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Peter Michael PhD

Department Chairperson of Geosciences
McMan Professor of Geosciences College of Engineering & Natural Sciences
Geosciences
918-631-3017
pjm@utulsa.edu
faculty-photo

Ph.D., Columbia University
M.A., Columbia University
B.A., Colgate University


Field and Geochemical Laboratory study of Igneous Rocks
Mid-ocean Ridges and Oceanic Plateaus

Oceanography
Mineralogy
Igneous and Metamorphic Rocks and Processes
Plate Tectonics


The following may be selected publications rather than a comprehensive list.

Journal Articles


Michael, P.J. and Graham, D.W. The Behavior and Concentration of CO2 in the Suboceanic Mantle: Inferences from Undegassed Ocean Ridge and Ocean Island Basalts. Lithos, 236-237 (2015),pp.338-351.

Jackson, M.G., Cabral, R., Rose-Koga, E.F., Koga, K.T., Price, A.A., Hauri, E.H., and Michael, P.J., Ultra-depleted melts in olivine-hosted melt inclusions from the Ontong Java Plateau. Chemical Geology, 414 (2015), pp 124-137.

Bendtz, K., Milstead, D., Hächler, H.-P., Hirt, A. M., Mermod, P., Michael, P., Sloan, T., Tegner, C., and S. B. Thorarinsson (2013) Search for Magnetic Monopoles in Polar Volcanic Rocks. Phys. Rev. Lett., 110, 121803. doi/10.1103/PhysRevLett.110.121803. PACS:14.80.Hv, 91.25.-r, 91.35.Gf, 93.30.Li

Escrig, S., Bézos, A., Langmuir, C.H., Michael, P.J., and R.J. Arculus, (2012) Characterizing the effect of mantle source, subduction input and melting in the Fonualei Spreading Center, Lau Basin: Constraints on the origin of the boninitic signature of the back-arc lavas. Geochem. Geophys. Geosyst.,13, Q10008,doi:10.1029/2012GC004130

Tivey, M.K., E. Becker, R. Beinart, C.R. Fisher, P.R. Girguis, C.H. Langmuir, P.J. Michael, and A.-L. Reysenbach. (2012). Links from mantle to microbe at the Lau Integrated Study Site: Insights from a back-arc spreading center. Oceanography 25(1):62–77, http://dx.doi.org/10.5670/oceanog.2012.04.

Resing, J.A., Rubin, K.H., Embley, R.W., Lupton, J.E., Baker, E.T., Dziak, R.P., Baumberger, T., Lilley, M.D., Huber, J.A., Shank, T.M., Butterfield, D.A., Clague, D.A., Keller, N.S., Merle, S.G., Buck, N.J., Michael, P.J., Soule, A., Caress, D.W., Walker, S.L., Davis, R., Cowen, J.P., REysenbach, A.-L., Thomas, H., (2011), Active Submarine eruption of boninite in the northeastern Lau Basin. Nature Geoscience 4, 799-806 doi:10.1038/ngeo1275

Timm, C., Hoernle, K., Werner, R., Hauff, F., van den Bogaard, P., Michael, P., Coffin, M.F., and Koppers, A., (2011) Age and Geochemistry of the oceanic Manihiki Plateau, SW Pacific: New Evidence for a Plume Origin. Earth Planet. Sci. Lett. 304, 135-146.

Escrig, S., A. Bézos, S. L. Goldstein, C. H. Langmuir, and P. J. Michael, (2009), Mantle source variations beneath the Eastern Lau Spreading Center and the nature of subduction components in the Lau basin–Tonga arc system, Geochem. Geophys. Geosyst., 10, Q04014, doi:10.1029/2008GC002281.

Bézos, A., Escrig, S., Langmuir, C.H., Michael, P.J., and Asimow, P.D., (2009) Origins of chemical diversity of back-arc basin basalts: a segment-scale study of the Eastern Lau Spreading Center. Jour. Geophys. Res. 114, B06212, doi:10.1029/2008JB005924, pp. 1–25.

Standish, J. J., H. J. B. Dick, P. J. Michael, W. G. Melson, and T. O’Hearn (2008), MORB generation beneath the ultraslow spreading Southwest Indian Ridge (9–25°E): Major element chemistry and the importance of process versus source, Geochem. Geophys. Geosyst., 9, Q05004, doi:10.1029/2008GC001959.

Goldstein, S.L., Soffer, G., Langmuir, C.H., Lehnert, K.A., Graham, D.W., Michael, P.J., (2008): Origin of a ‘Southern Hemisphere’ geochemical signature in the Arctic upper mantle. Nature 453, 89-93.

Baker, E.T., H.N. Edmonds, P.J. Michael, W. Bach, H.J.B. Dick, J.E. Snow, S.L. Walker, N.R. Banerjee, and C.H. Langmuir (2004): Hydrothermal venting in magma deserts: The ultraslow-spreading Gakkel and South West Indian Ridges. Geochem. Geophys. Geosys., 5(8), Q08002, doi: 10.1029/2004GC000712.

Michael, P.J., Langmuir, C.H., Dick, H.J.B., Snow, J.E., Goldstein, S.L., Graham, D.W., Lehnert, K., Kurras, G., Jokat, W., Mühe, R., and Edmonds, H.N., 2003, Magmatic and amagmatic seafloor generation at the ultra-slow Gakkel ridge, Arctic Ocean, Nature 423, 956-961.

Edmonds, H.N. Michael, P.J., Baker, E.T., Connelly, D.P., Snow, J.E., Langmuir, C.H., Dick, H.J.B., Mühe, R., German, C.R., and Graham, D.W., 2003, Discovery of abundant hydrothermal venting on the ultra-slow spreading Gakkel Ridge, Arctic Ocean, Nature v. 421, 252-256.

Sims, K.W.W., Blichert-Toft, J., Fornari, D.J., Fornari, M.R., Goldstein, S.J., Johnson, P., DePaolo, D.J., Hart, S.R., Murrell, M.T., Michael, P.J., and Layne, G.D., 2003, Aberrant youth: Chemical and isotopic constraints on the origin of off-axis lavas from the East Pacific Rise, 9°-10°N, Geology, Geophysics, Geosystems (G-cubed) Paper number 2002GC000443., pp. 1-27.

Sims, K.W., Goldstein, S.J., Blichert-Toft, J., Perfit, M.R., Kelemen, P., Fornari, D.J., Michael, P., Murrell, M.T., Hart, S.R., DePaolo, D.J., Layne, G., Ball, L., Jull, M., and Bender, J., 2002, Chemical and isotopic constraints on the generation and transport of magma beneath the East Pacific Rise, Geochimica et Cosmochimica Acta, v. 66, 3481-3504.

Michael, P.J., McDonough, W.F., Nielsen, R.L. and Cornell, W.C., 2001, Depleted Melt Inclusions in MORB Plagioclase: Messages from the Mantle or Mirages from the Magma Chamber? Chemical Geology, v. 183, 43-62.

Michael, P.J., 1999, Implications for Magmatic Processes at Ontong Java Plateau from Volatile and Major Element Contents of Cretaceous Basalt Glasses, Geology, Geophysics, Geosystems (G-cubed) Paper number 1999GC000025., pp. 1-18.

Nielsen, R.L., Michael, P.J. and Sours-Page, R., 1998, Chemical and physical indicators of compromised melt inclusions, Geochim et Cosmochim Acta 62, pp. 831-839.

Michael, P.J. and Cornell, W.C., 1998, Influence of Spreading Rate and Magma Supply on Crystallization and Assimilation Beneath Mid-Ocean Ridges: Evidence from Chlorine and Major Element Chemistry of Mid Ocean Ridge Basalts, Jour. Geophys. Res. v. 103, pp. 18, 325-18, 356.

Michael, P.J., 1995, Regionally distinctive sources of depleted MORB: evidence from trace elements and H2O. Earth Planet. Sci. Lett. v. 131, pp. 301-320.

Magenheim, A. J., Spivack, A.J., Michael, P.J., and Gieskes, J.M., 1995, Chlorine stable isotope composition of the oceanic crust: Implications for Earth’s distribution of chlorine, Earth Planet. Sci. Lett. 131, pp. 427-432.

Michael, P.J., Forsyth D.W. and Blackman, D.K., Fox, P.J., Hanan, B.B., Harding, A.J., Macdonald, K.C., Neumann, G.A., Orcutt, J.A., Tolstoy, M. and Weiland, C.M., 1994, Mantle control of a dynamically evolving spreading center: Mid-Atlantic Ridge, 31°-34°S. Earth Planet. Sci. Lett., v. 121, pp. 451-468.

Allan, J.F., Cousens, B.L., Michael, P.J., Chase, R.L., Gorton, M.P. and Scott, S.D., 1993, The Tuzo Wilson Volcanic Field: Alkalic volcanism at a complex, diffuse transform-trench-ridge triple junction, Jour. Geophys. Res. v. 98, pp. 22, 367–22, 387.

Michael, P. J., 1991, Intrusion of basaltic magma into a crystallizing granitic magma chamber: the Cordillera del Paine Pluton in southern Chile. Contrib. Mineralogy and Petrology v. 108, pp. 396–418.

Michael, P.J. and Schilling, J.-G., 1989, Chlorine in mid-ocean ridge magmas: Evidence for assimilation of seawater-influenced components. Geochim.et Cosmochim. Acta., v.53, pp. 3, 131–133, 143.

Michael, P.J. and Chase, R.L., 1989, Petrologic and Geologic variations along the Southern Explorer Ridge, northeast Pacific Ocean. Jour. Geophysical Res., v. 94, p. 13, 895–13, 918.

Bonatti, E. and Michael, P.J., 1989, Mantle peridotites from continental rifts to ocean basins to subduction zones. Earth Planet. Sci. Lett., v. 91, 297–311.

Michael, P.J., 1988, Partition coefficients for rare earth elements into mafic minerals of high-silica rhyolites: the importance of accessory mineral inclusions. Geochim. et Cosmochim. Acta., v. 52, pp. 275–282.

Michael, P.J., 1988, The concentration, behavior and storage of H2O in the suboceanic mantle: Implications for Mantle metasomatism. Geochim. et Cosmochim. Acta. v.52, p. 555–566.

Sullivan, B.T., Osborne, N.R., Hardy, W.N., Carolan, J.F., Yang, B.X., Michael, P.J. and Parsons, R.R., 1988, Bi-Sr-Ca-Cu-oxide superconducting thin films deposited by dc magnetron sputtering, Appl. Phys. Lett. v. 52, 1992–1994

Michael, P.J. and Chase, R.L., 1987, The influence of primary magma composition, H2O and pressure on mid-ocean ridge basalt differentiation. Contrib. Mineral. Petrol., v. 96, pp. 245–263.

Michael, P.J., and Bonatti, E., 1985, Petrology of Ultramafic rocks from sites 556, 558 and 560 in the North Atlantic. Initial Reports of the Deep Dea Drilling Project, v. 82, pp. 523–528.

Michael, P.J., and Bonatti, E., 1985, Peridotite composition from the North Atlantic: regional and tectonic variations and implications for partial melting. Earth and Planet. Sci. Lett., v. 73, pp. 91–104.

Michael, P.J., 1984, Differentiation of the Cordillera Paine granite by in situ fractional crystallization. Contrib. Mineral. Petrol., v. 87, pp. 179–195.

Michael, P.J., 1983, Reply to a Comment by Wes Hildreth on "Differentiation of high-silica magmas through processes of crystallization". Geology, v. 11, pp. 623–624.

Michael, P.J., 1983, Differentiation of high-silica magmas through processes of crystallization. Geology, v. 11, pp. 31-34.

Coleman, P.J., Michael, P.J., and Mutter, J., 1982, Origin of the Naturaliste Plateau, S.E. Indian Ocean: Implications from dredged basalts. Jour. Geol. Soc. Australia, v. 29, pp. 457–468.

Bryan, W.B., Thompson, G., and Michael, P.J., 1979, Compositional variation in a steady-state zoned magma chamber: mid-Atlantic Ridge at 36°50’N. Tectonophysics, v. 55, pp. 63-85.

Book Chapter


Scott, S.D., Chase, R.L., Hannington, M., Michael, P.J., McConachy, T.M. and Shea, G.T., 1990, Sulfide deposits,tectonics and petrogenesis of Explorer Ridge, northeast Pacific Ocean. in J. Malpas, E.M. Moores, A.Panayiotou and C. Xenophontos, editors: Ophiolites – Oceanic Crustal Analogues, Proceedings of the Symposium "Troodos 87", Geol. Survey Dept., Ministry of Agriculture and Natural Resources, Nicosia, pp. 719-733.

Conference Proceedings


Rubin, K.H., Michael, P., Jenner, F., Clague, D., Glancy, S., Hellebrand, E., Arculus, R., Gill, J., Todd, E., Lupton, J., Embley, R., 2015, Composition within and between Tonga arc/Lau Basin backarc eruptions reveal wide variety of parent melts linked to eruption styles. Goldschmidt Geochemistry Conference 2015, Prague.

Michael, P.J., Graham, D.W. 2013, Concentration and Behavior of CO2 in MORB and OIB: a reevaluation. Goldschmidt Geochemistry Conference 2013, Florence, Italy.

Michael, P.J., Escrig, S., Bézos, A and Langmuir, C., 2014, Influence of slab composition on Th and REE in arc and back arc lavas: Subduction of Louisville Smts, Tonga. Goldschmidt Geochemistry Conference 2014, Sacramento, CA, USA, Goldschmidt Abstracts 2014, 1679.

Rubin, K.H., Michael, P., Gill, J., Clague, D., Plank, T., Escrig, S., Glancy, S., Todd, E., Cooper, L., Keller, N., Soule, A., Hellebrand, E., Kelley, K., Cottrell, E., Jenner, F., Arculus, R., Ruprechet, P., Lupton, J., Langmuir, C., Resing, J., and Embley, R., 2013, Timescale and petrogenesis of 2009 and older W. Mata boninite magmas. Goldschmidt Geochemistry Conference 2013, Florence, Italy.

Lundstrom, C., Gajos, N., and Michael, P., 2011, Production of the Cordillera del Paine Igneous Complex by Thermal Migration Zone Refining, Goldschmidt Geochemistry Conference, Prague, August, 2011, Mineralogical Magazine, p. 1366.

Park, S.H., Langmuir, C.H., Lin, J., Hahm, D., Kim, S.S., Hong, S.G., Lee, Y.M. and Michael, P., 2011, Preliminary results of a recent expedition to the Australian-Antarctic Ridge, Goldschmidt Geochemistry Conference, Prague, August, 2011, Mineralogical Magazine, p. 1600.

Michael, P.J. and Escrig, S., 2010, Cl/H2O of mantle-derived magmas: relation to seawater salinity", Goldschmidt Geochemistry Conference, Knoxville, TN, USA, June, 2010, Geochimica et Cosmochimica Acta 74(S1), A705.

Michael, P.J., 2009, Degassing of sulfur from MORB: Evidence from popping rocks. Goldschmidt Geochemistry Conference, Davos, Switzerland, June, 2009, Geochimica et Cosmochimica Acta 73(S1), A877

Bonifacie, M., Eiler, J., Stolper, E., Bézos, A., Michael P. , Langmuir, C., 2008, Oxygen Isotope Evidence for Slab-Derived Silicate Melt in Lau Basin Back-Arc Lavas. Goldschmidt Geochemistry Conference, Vancouver, Canada, July, 2008, Geochimica et Cosmochimica Acta 72(S1), A96.

Langmuir, C., Bézos, A., Escrig, S. and Michael, P., 2008, Hydrous Components in the Mantle. Goldschmidt Geochemistry Conference, Vancouver, Canada, July, 2008, Geochimica et Cosmochimica Acta 72(S1), A515.

Goldstein, S.L., Soffer, G., Langmuir, C.H., Cai, Y., Lehnert, K.A., Graham, D.W., and Michael, P.J., 2008, The Gakkel Ridge – A Microcosm of Global MORB Variability, a Smoking Gun for an Origin of DUPAL Mantle. Goldschmidt Geochemistry Conference, Vancouver, Canada, July, 2008, Geochimica et Cosmochimica Acta 72(S1), A316.

Park, S.-H., Michael, P.J., Lee, J.I., Lee, K.Y., 2007, Geochemistry of basalt from the Eastern Woodlark Basin: Its implications for the mantle heterogeneity. Goldschmidt Geochemistry Conference, Cologne, August, 2007, Geochimica et Cosmochimica Acta 71(S1), A754.

Langmuir, C.H., Michael, P.J., Lehnert, K., Goldstein, S.L., Soffer, G., Gier, E., and Snow, J., 2004, Constraints from the Gakkel Ridge on the origin of MORB. Goldschmidt Geochemistry Conference, Copenhagen, June, 2004, Geochimica et Cosmochimica Acta 68(S1), A690.

Soffer, G., Goldstein, S.L., Graham, D.W., Langmuir, C.H., and Michael, P.J., 2004, An arctic mantle domain boundary: Evidence from the Gakkel Ridge. Goldschmidt Geochemistry Conference, Copenhagen, June, 2004, Geochimica et Cosmochimica Acta 68(S1), A692.

Michael, P.J., Langmuir, C.H., Goldstein, S., Soffer, G., Dick, H., Snow, J.E., and Graham, D., 2004, Geochemistry of Gakkel Ridge. Goldschmidt Geochemistry Conference, Copenhagen, June, 2004, Geochimica et Cosmochimica Acta 68(S1), A692.

Snow, J.E., Hellebrand, E.H., von Der Handt, A., Dick, H., Michael, P., Langmuir, C. and Goldstein, S., 2004, Comparative melting dynamics of Gakkel Ridge and Lena Trough, Arctic Ocean. Goldschmidt Geochemistry Conference, Copenhagen, June, 2004, Geochimica et Cosmochimica Acta 68(S1), A691.

Dick, H.J.B., Snow, J., Michael, P.J., Hellebrand, E.H., Shimizu, N., and Hofmann, A., 2004, Gakkel Ridge: Mantle and melting at ultraslow spreading rates. Goldschmidt Geochemistry Conference, Copenhagen, June, 2004, Geochimica et Cosmochimica Acta 68(S1), A691.

Michael, P.J. and Kamenetsky, V.S., 2002, Low H2O in the LOMU source of oceanic magmas: inferences from a South Atlantic submarine glass, Goldschmidt Geochemistry Conference, Davos, Switzerland, August, 2002.

Michael, P.J. and Natland, J.H., 2002, Sulfide Undersaturated basalts from mid-ocean ridges and oceanic plateaus; Implications for PGE. Symposium for Highly Siderophile Elements, Nancy, France, August, 2002.

Snow, J.E., Dick, H., Buechl, A., Michael, P., Hellebrand, E., Ship Sc Parties HEALY 102-POLARSTERN 59, 2001, Mantle Partial Melting Beneath Gakkel Ridge Reflected in the Petrography of Spinel Lherzolites, Eos Trans. Amer. Geophys. Union, v. 82, F.

Edmonds, H.N., Michael, P.J., Baker, E.T., Graham, D.W., Vock, M., Snow, J., Mühe, R., Connelly, D.P., German, C.R., 2001, Hot Springs in a Cold Ocean: Evidence for Abundant Hydrothermal Venting on the Ultra-Slow Spreading Gakkel Ridge, Eos Trans. Amer. Geophys. Union, v. 82, F.

Adams, M. L. and Michael, P.J., 2001, Bridging the Gap: The Role of Research in Science Education, Eos Trans. Amer. Geophys. Union, v. 82, F.

Kurras, G.J., Gauger, S., Michael, P., Thiede, J., Dick, H., Hartmann, T., Hatzky, J., Jokat, W., Langmuir, C., Axial Valley Morphology of the Gakkel Ridge [8° W-88° E]: Seabeam and Hydrosweep Bathymetry from the Arctic Mid-Ocean Ridge Expedition (AMORE 2001). Eos Trans. Amer. Geophys. Union, v. 82, F.

Dick, H.J., Kurras, G.J., Snow, J., Jokat, W., Michael, P., Langmuir, C., 2001, Volcanic and Tectonic Processes along the Gakkel Ridge; Morphologic Interpretation of Axial Valley Features and Samples from the Arctic Mid-Ocean Ridge Expedition (AMORE 2001). Eos Trans. Amer. Geophys. Union, v. 82, F.

Michael, P.J., Thiede, J., Dick, H.J.., Goldstein, S.L., Graham, D., Jokat, W., Langmuir, C.H., Mühe, R., Snow, J. E., 2001, The Arctic Mid-Ocean Ridge Expedition -AMORE 2001- Seafloor Spreading at the Top of the World, Eos Trans. Amer. Geophys. Union, v. 82, F.

Langmuir, C. H., Lehnert, K., Goldstein, S. L., Michael, P., Graham, D., Schramm, B., 2001, Petrology of Gakkel Ridge Basalts: Preliminary Results, Eos Trans. Amer. Geophys. Union, v. 82, F.

Gauger, S., Hatzky, J., Hartmann, T., Kurras, G., Thiede, J., Michael, P., Jokat, W., 2001, Hydrosweep and Seabeam Measurements during the AMORE Expedition to Gakkel Ridge, Eos Trans. Amer. Geophys. Union, v. 82, F.

Michael, P.J., McDonough, W.F., Nielsen, R.L. and Cornell, W.C., 2000, Depleted Melt inclusions in Plagioclase: Messages from the mantle or mirages in the making? Trans. Amer. Geophys. Union, v. 81, p. F1248.

Michael, P.J., 1999, H2O Characteristics of Mantle End Members: Evidence from MORB and OIB. 9th Annual V.M. Goldschmidt Conference.

Michael, P.J., Sims, K., Fornari, D.J., Perfit, M.R., 1999, Excess Radium-226 in Mid-Ocean Ridge basalts is not caused by assimilation, Trans. Amer. Geophys. Union, v. 80, p. F1087.

Michael, P. J., Hanan, B. B. and Neumann, G.A., 1998, Seven Million Years in the Life of a Short-Wavelength Mantle Geochemical Anomaly Along the Mid-Atlantic Ridge, 33°S: Implications for Mantle Dynamics, Trans. Amer. Geophys. Union, v. 80, p. F938.

Michael, P.J. and Hanan, B.B., 1998, Magmatic diversity in a small seamount of the Tristan da Cunha group: Implications for evolution of Ocean Islands, Geological Society America Penrose Conf. Series Abstract Volume "Evolution of Ocean Island Volcanoes" p. 60.

Hanan, B.B. and Michael, P.J., 1997, Temporal evolution of the short wavelength geochemical anomaly at 33.0°S along the southern mid-Atlantic Ridge: New Pb isotope constraints from off-axis basalts to 6 Ma, Trans. Amer. Geophys. Union, v. 78, p. F670.

Michael, P.J. and Cornell, W.C., 1997, The influence of spreading rate and magma supply on crystallization and assimilation beneath mid-ocean ridges, Trans. Amer. Geophys. Union, v. 78, p. F657.

Michael, P.J. and Cornell, W.C., 1996, Assimilation beneath Ocean Islands: Inferences from Mid-Ocean ridge basalts. Presented at Amer. Geophys. Union. Chapman Conf. on Shallow-Level Processes in Ocean Island Magmatism. November 10-15, Tenerife, Canary Islands.

Neumann, G.A., Michael, P.J. and Hanan, B.B., 1996, Temporal variation of crustal emplacement, 33°S Mid-Atlantic Ridge. Journal of Conference Abstracts, v. 1 no. 2, p. 836. Presented at the FARA IR Mid-Atlantic Ridge Symposium, Reykjavik, Iceland, June, 1996.

Michael, P.J. and Cornell, W.C., 1996, Influence of spreading rate, magma flux and tectonic setting on crystallization pressure and assimilation beneath mid-ocean ridges, Journal of Conference Abstracts, v. 1 no. 2, p. 828. Presented at the FARA IR Mid-Atlantic Ridge Symposium, Reykjavik, Iceland, June, 1996.

Michael, P.J. and Cornell, W.C., 1996, H2O, CO2 , Cl and S contents in 122 Ma glasses from Ontong Java Plateau: Implications for mantle and crustal processes, Trans. Amer. Geophys. Union, v. 77, p. F714.

Graham, D.W., Michael, P.J. and Hanan, B.B., 1996, Helium-carbon dioxide relationships in MORB glasses from the Mid-Atlantic Ridge at 33°S, Trans. Amer. Geophys. Union, v. 77, p. F830.

Neumann, G.A., Hanan, B.B. and Michael, P.J., 1996, Temporal variation of crustal emplacement, 33°S MAR. Trans. Amer. Geophys. Union, v. 77, p. S276.

Michael, P.J. and W.C. Cornell, 1995, Chlorine in MORB: Influence of spreading rate, tectonic setting and crystallization pressure on assimilation in magma chambers, Trans. Amer. Geophys. Union, v. 76, p. F695.

Sherman, S.B., Karsten, J.L., Klein, E.M. and Michael, P.J., 1995, Water content of southern Chile Ridge axis glasses, Trans. Amer. Geophys. Union, v. 76, p. F531.

Michael, Peter. “Petrology and Geochemistry of MORB from the EPR, 28°-36°S: Implications for Mantle and Crustal Processes.” Vol. 74. Trans. Amer. Geophys. Union, 1993. 686. Print.

Michael, P.J. and Hanan, B.B., 1992, Trace element evidence for multi-component, multistage mixing in the sources of MORB: southern Mid-Atlantic Ridge, Trans. Amer. Geophys. Union, v. 73, p. 605.

Hanan, B.B., Graham, D.W., Michael, P.J. and Schilling, J-G., 1992, He and Pb Isotope constraints for the origin of a short wavelength geochemical anomaly along the South Atlantic Mid-Ocean Ridge, Trans. Amer. Geophys. Union, v. 73, p. 582-583.

Michael, P.J., 1991, H2O and Trace elements in MORB: Implications for large-scale heterogeneity in the mantle. Trans. Amer. Geophys. Union, v. 72, p. 544.

Hanan, B.B., Michael, P.J., Fox. P.J. and Schilling, J-G., 1991, Pb isotopic evidence for short wavelength mantle heterogeneity along the South Atlantic MAR, Trans. Amer. Geophys. Union, v. 72, p. 453.

Michael, P.J., Hanan, B.B. and Fox, P.J., 1990, Petrological and Geochemical Variations along contrasting Ridge segments: 31°-34° S., MAR. Trans. Amer. Geophys. Union, v. 71, p. 1628.

Michael, P.J. and Shimizu, N., 1989, Liquid versus solid-state mixing in MORB: Preliminary evidence from minor and trace element zoning in plagioclase phenocrysts., Trans. Amer. Geophys. Union, v. 70, p. 1400.

Michael, P.J., 1989, Intrusion of basaltic magma into a crystallizing granitic magma chamber: Cordillera del Paine in the southernmost Andes, Chile. Int. Assoc. Volcanol. and Chem. of the Earth’s Interior, Quadrennial Meeting in Santa Fe, in New Mexico Bur. Mines and Mineral Res. Bull. 131, p. 189.

Michael, P.J., and Schilling, J-G. 1988, Chlorine in Mid-Ocean Ridge basalts and FeTi basalts: Evidence for magma chamber contamination by a seawater-derived component? Trans. Amer. Geophys. Union, v. 69, p. 1, 469.

Bonatti, E. and P.J. Michael, 1988, Mantle Peridotites from Continental Rifts to Ocean Basins, Trans. Amer. Geophys. Union, v. 69, p. 1479-1480.

Bonatti, E. and P.J. Michael, 1988, Mantle Peridotites from Continental Rifts to Ocean Basins, Trans. Amer. Geophys. Union, v. 69, p. 1479-1480.

Michael, P.J. and Chase R.L. 1987, Petrologic and Tectonic Variations along the southern Explorer Ridge. Trans. Amer. Geophys. Union, v. 68, p. 1540.

Michael, P.J. 1987, Concentration, Behavior and Storage of Water in the suboceanic Upper Mantle: Implications for Metasomatism, Trans. Amer. Geophys. Union, v. 68, p. 443-444.

Scott, S.D., Herzig, P.M., Chase, R.L., and Michael,P.J. , 1987 Sulfide deposits, tectonics and petrogenesis of Explorer Ridge, northeast Pacific Ocean compared with ophiolitic sulfide deposits on Cyprus. in "Ophiolites and Oceanic Lithosphere" Symposium Troodos, 1987, p. 161.

Bonatti, E. and Michael, P.J., 1986, Mantle peridotites from continental rifts to Ocean basins, Trans. Amer. Geophys. Union, v. 67, p. 393.

Michael, P.J. and Chase, R.L., 1986, Influence of P, H2O and Composition on MORB Differentiation, Trans. Amer. Geophys. Union, v. 67, pp. 1254-1255.

Michael, P.J., Chase, R.L., Shea, G.T., and O’Hearn, T., 1985, Petrology and tectonics of southern Explorer Ridge, Geol. Soc. Amer. Abs. with Programs, v. 17, p. 369.

Michael, P.J., 1985, Contrasting rare earth element differentiation trends in granites: control by trace phases, Geol. Soc. Amer. Abs. with Programs, v. 17, p. 369.

Michael, P.J. and Chase, R.L., 1985, Trace element and Sr-isotope Variations in basalts from the Explorer, Dellwood and Tuzo Wilson spreading segments and Seamounts, northeast Pacific, Trans. Amer. Geophys. Union, v. 66, p. 926.

Shea, G.T., Michael, P.J. and Chase, R.L., 1985, Basalt geochemistry from the Magic Mountain hydrothermal region, Southern Explorer Ridge, Trans. Amer. Geophys. Union, v. 66, p. 926.

Michael, P.J. and Bonatti, E., 1984, Peridotite composition from the North Atlantic: Regional variations and implications for partial melting, Trans. Amer. Geophys. Union, v. 65, pp. 302-203.

Michael, P.J., and Bonatti, E., 1983, Peridotites from DSDP Leg 82 and the Oceanographer F.Z., Trans. Amer. Geophys. Union, v. 64, p. 345.

Forsythe, R., Michael, P.J. and Mpodozis, C., 1981, Metamorphic complexes of the Estrecho Nelson area: cases for subduction-related metamorphism in the southern Andes. in "Correlation of West Antarctica withthe southern Andes", Geol, Soc. London symposium.

Michael, P.J., 1981, Ba-zonation in orthoclase: implications for crystallization and differentiation of granites, Trans. Amer. Geophys. Union, v. 62, p. 438.

Michael, P.J., 1980, Emplacement and differentiation of two granitic plutons in the southern Andes, Trans. Amer. Geophys. Union, v. 61, p. 401.

Michael, P.J., 1980, Differentiation of a granitic pluton in the southern Andes, Geol. Soc. Amer. Abs. with Programs v. 11, p. 483.

Michael, P.J., 1979, A late Cenozoic high-potassium volcanic center in southern Chile, Trans. Amer. Geophys. Union, v. 60, p. 414.

Others


Park, S.-H., Langmuir, C.H., Lin, J., Kim, S., Hahm, D., Michael, P.J., Scott, S.R., and Sims, K.W., 2014, Mantle domain and segmentation at the Australian-Antarctic Ridge, Abstract #20738 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15–19 Dec.

Graham, D.W., Michael, P.J., and Rubin, K.H., 2014, Variations in Magmatic He, CO2 and δ13 C during the 2005-06 Seafloor Eruption Near 9°50’N on the East Pacific Rise Abstract #10493, presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15–19 Dec.

Rubin, K.H., Michael, P., Perfit, M., and Sinton, J., 2014, Magma dynamics from temporal and spatial compositional variations within and between eruptions. Goldschmidt Geochemistry Conference 2014, Sacramento, CA, USA, Goldschmidt Abstracts 2014, 2125.

Jackson, M.G., Cabral, R.A., Rose-Koga, E.F., Koga, K.T., Price, A.A., Hauri, E.H. and Michael, P.J., 2014, An Ultra-Depleted Mantle Component in the Ontong Java Plateau Revealed by Major, Trace and Volatile Element Abundances in Olivine-Hosted Melt Inclusions. Abstract #14203, presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15–19 Dec.

Michael, P.J., Graham, D.W., and Perfit, M.R., 2012, Vesiculation and degassing in the 2005-6 submarine flow at 9°50’N, East Pacific Rise: Implications for volatile fluxes and CO2:He kinetic fractionation Abstract V24B-04, presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec.

Park, S.H., Langmuir, C.H., Lin, J., Kim, S.S., Hahm, D., Michael, P.J. and Baker, E.T., 2012, Geochemistry of lavas from the Australian-Antarctic Ridge, easternmost Southeast Indian Ridge. Abstract V11D-2807, presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec.

Loewen, M.W., Kent, A.J., Duncan, R.A., Lrawl, K., Michael, P.J. and Graham, D.W., 2012, Geochemical Uniformity over 30 Million Years of Volcanic Activity in the Caribbean Large Igneous Province: Evidence from Curacao and Haiti. Abstract DI51A2336, presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec.

Gajos, N., Lundstrom, C., Michael, P., 2012, Non-traditional isotope variations in the Cordillera del Paine Pluton. Goldschmidt Geochemistry Conference 2012, Abstract 01449.

Michael, P.J., Escrig, S., Bézos, A., Langmuir, C.H., Arculus, R.J., and Goddard, C.I., 2011, Along- and Across-arc Basalt Geochemical Trends of Seamounts in Lau Basin: Evidence for Fluid Components and Mantle Melting, Abstract V54B-02, presented at 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec.

Bézos, A., Escrig, S., Langmuir, C.H., and Michael, P.J., 2011, The role of subduction fluids and mantle sources in the petrogenesis of Eastern Lau Spreading Center magmas, Abstract V41D-2547, presented at 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec.

Cai, Y., Goldstin, S.L., Langmuir, C.H., and Michael, P.J., 2011, Melting and refertilization of the Arctic mantle from the ultra-slow spreading Gakkel Ridge, Abstract V31D-2564, presented at 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec.

Michael, P.J., 2011, “A Backarc in Time” – News and Views Commentary. Nature, v. 469, pp. 170–171.

Michael, P.J., Gill, J.B., and Ramos, F.C., 2010, Comparison of Magma Residence, Magma Ascent and Magma-Hydrothermal Interaction at EPR 9°N and Endeavour Segment., Abstract V11A-2241 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.

Park, S., Sims, K.W., Michael, P.J., Orihashi, Y., Plank, T., and Abe, N., 2010, Geochemical characteristics of off-axis lavas from the Chile Rise: Geochemical characteristics of off-axis lavas from the Chile Rise., Abstract V32B-2365 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.

Graham, D.W., Lupton, J.E., Goldstein, S.L., Langmuir, C.H., and Michael, P.J., 2009, Helium Isotope Variations in Basalts Along Gakkel Ridge and Heterogeneity of the Arctic Upper Mantle, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract V31F-05.

Michael, P.J., Escrig, S., Rubin, K.H., Cooper, L.B., Langmuir, C.H., Clague, D.A., Keller, N.S. and Plank, T., 2009, Major and Trace Elements and Volatiles in Glasses from the 2009 Rapid Response Expedition to West Mata Volcano and Northeast Lau Spreading Center (NELSC), Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract V51D-1720.

Michael, P.J. and Cheadle, M.J., 2009, Making a Crust. Science v. 323, 1017–1018.

Escrig, S., Bezos, A., Langmuir, C.H., and Michael, P.J., 2009, Mapping and Deciphering Mantle Source Heterogeneity and Subduction Input in the Lau Basin, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract T21A-1769.

Hoernle, K., Timm, C., Hauff, S.F., Rupke, L., Werner, R., van den Bogaard, P., Michael, P.J., Coffin, M., Mortimer, N.N., and Davy, B.W., 2009, New Results for the Multi-stage Geochemical Evolution of the Manihiki and Hikurangi Plateaus, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract V51H-03.

Rubin, K.H., Embley, R.W., Clague, D.A., Resing, J.A., Michael, P.J., Keller, N.S., and Baker, E.T., 2009, Lavas from Active Boninite and Very Recent Basalt Eruptions at Two Submarine NE Lau Basin Sites, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract V44I-05.

Keller, N.S., Rubin, K.H., Clague, D.A., Michael, P.J., Resing, J.A., Cooper, L.B., Shaw, A.M., Ono, S., Tamura, Y., 2009, Sulfur in submarine eruptions: Observations and preliminary data from West Mata, NE Lau Basin, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract V43I-08.

Standish, J., Langmuir, C., Michael, P., and Goldstein, S., 2008, A Window into Exotic Arctic Mantle. Goldschmidt Geochemistry Conference, Vancouver, Canada, July, 2008, Geochimica et Cosmochimica Acta 72(S1), A891.

Vogt, P.R., Michael, P.J., White, S.M., Macdonald, K.C., 2008, Tall Volcanic Edifices on MOR Spreading Boundaries-Characteristics and Causes. Eos Trans. AGU, 89(52), Fall Meet. Suppl., Abstract V41B-2088.

Michael, P.J., Perfit, M.R., Palke, A., Fornari, D.J., Soule, S.A. 2008, Observations of CO2 Exsolution in Submarine Lava Flows: The 2005-6 Eruption on the East Pacific Rise, 9°50"N. Eos Trans. AGU, 89(52), Fall Meet. Suppl., Abstract V21B-2106.

Gill, J., Michael, P., 2008, Open Magmatic Systems at Ocean Ridges. Eos Trans. AGU, 89(52), Fall Meet. Suppl., Abstract V51F-2115.

Langmuir, C.H., Bezos, A., Escrig, S., Michael, P.J., 2007 Water and Melting in Back-arc Basins: New perspectives from the Eastern Lau Spreading Center. Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract V51G-01.

Bezos, A., Escrig, S., Langmuir, C.H., Michael,P.J., Asimow, P.D., 2007, Trace element constraints on the origin of subduction components in the Eastern Lau Back- arc Spreading Center. Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract V51G-02.

Escrig, S., Goldstein, S.L., Bezos, A., Langmuir, C.H., ,b>Michael, P.J., 2007, Trace element and isotopic constraints on mantle source heterogeneity and subduction- related fluids along the Eastern Lau Spreading Center. Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract V52A-07.

Woodcock, J., Gill, J., Ramos, F., Michael, P., 2007, Frequently Shifting Magma Sources at Endeavour Segment, Juan de Fuca Ridge. Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract V21B-0602.

Michael, P.J., Bezos, A., Langmuir, C.H., Escrig, S., Matzen, A.K., Asimow, P., Arculus, R., 2007, Cross-arc Variations in Lava Chemistry in the Tonga Arc-Lau Back Arc System, 19- 23°S. Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract V52A-08.

Michael, P.J., 2006, Extremely Large Eruptions from Ontong Java Plateau., Geological Society of America Abstracts with Programs, 38(1), 5.

Goldstein, S.L., Langmuir, C.H., Soffer, G., Lehnert, K., Cai, Y., Graham, D.W., Michael, P.J., 2006, A "DUPAL" Geochemical Signature in Gakkel Ridge MORB and Relationship to Cenozoic Arctic Tectonics, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V12C-02.

Standish, J.J., Dick, H., Hart, S., Kurz, M., Michael, P., Frey, F., 2006, Chemical Variation and MORB Generation on the Ultraslow-Spreading Southwest Indian Ridge (9°-25° E), Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V11G-05.

Graham, D.W., Michael, P.J., 2006, A "DUPAL" Geochemical Signature in Gakkel Ridge MORB and Relationship to Cenozoic Arctic Tectonics, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V12C-02.

Cai, Y.M., Goldstein, S.L., Langmuir, C.H., and Michael, P., 2006, Along Axis Variability in the Sources of Eastern Gakkel Ridge Basalts, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V23E-0686.

Cai, Y.M., Goldstein, S.L., Langmuir, C.H., and Michael, P., 2006, Along Axis Variability in the Sources of Eastern Gakkel Ridge Basalts, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V23E-0686.

Woodcock, J.P., Gill, J., Kela, J., Michael, P., Ramos, F., 2006, Basalt Geochemistry of the Endeavour Segment, Juan de Fuca Ridge, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract B31B-1105.

Palke, A.C., Michael, P. J., Perfit, M R., 2006, CO2 Exsolution in Historic Submarine Lava Flows from the Juan de Fuca Ridge and the East Pacific Rise at 9°N, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V23B-0607.

Langmuir, C.H., Michael, P., Standish, J., Goldstein, S., 2006, Constraints on ocean ridge basalt generation from Gakkel Ridge basalts, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V12C-01.

Palke, A., Michael, P., and Perfit, M., 2006, Degassing of Submarine Lavas on the CoAxial Segment of the Juan de Fuca Mid-Ocean Ridge.. Geological Society of America Abstracts with Programs, 38(1), 30.

Michael, P.J., Langmuir, C., Goldstein, S.L., Graham, D.W., Ionov, D.A., Matzen, A.K., 2006, Evidence from Volatiles and Trace Elements for Continental Mantle in the Source of Gakkel Ridge MORB, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V12C-03.

Escrig, S., Goldstein, S.L., Bezos, A., Langmuir, C.H., Michael, P. J., 2006, Isotopic constraints on mantle source heterogeneity and subduction-related components along the Eastern Lau Spreading Center, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V34C-07.

Michael, P.J., and Cornell, W.C.C., 2006, Sulfide Concentration and Saturation in Natural MORB Glasses. Eos Trans. AGU, 87(36), Jt. Assem. Suppl,, Abstract V41C-04.

Graham, D W., Sinton, J.M., Hoernle, K., Christie, D.M., Mahoney, J.J., Hanan, B.B., Michael, P.J., Lupton, J.E., 2006, Helium Isotope Variations and Mantle Plume-Spreading Ridge Interaction Along the Galapagos Spreading Center, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V14A-02.

Bezos, A., Langmuir, C., Escrig, S., Michael, P., Asimow, P., Woods, S., 2005, Mantle petrogenesis of the Eastern Lau Spreading Center basalts and andesites and the role of subduction-related fluids. Eos Trans. AGU, 86(52), Fall Meet. Suppl., Abstract V41C-1469.

Michael, P.J., Langmuir, C.H., Bezos, A., Escrig, S., Matzen, A.K., Asimow, P., Woods, S., Gier, E., Goddard, C., Arculus, R., 2005, Geochemistry of Seamounts Between the East Lau Spreading Center and Tonga Arc. Eos Trans. AGU, 86(52), Fall Meet. Suppl., Abstract V34A-06.

Michael, P.J., Matzen, A.K., Langmuir, C.H. Goldstein, S.L., Soffer, G., Schmieder, P., Graham, D.W., 2003, High H2O in MORB From Gakkel Ridge. Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract V22F-07.

Michael, P.J., 2004, Evidence for Extremely Large Lava Flows on Ontong Java Plateau from High Precision Measurements of Volatiles and Major Elements in Natural Glasses. Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract V31A-1418.

Dick, H.J., Kelemen, P., Kikawa, E.,Cheadle, M.J., Michael, P. J., Snow, J., Schouten, H., Lin, J., Hirth, G., 2003, How Variable Slow-Spread Ocean Crust? Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract V22F-01.

Dick, H; Standish, J; Snow, J; Michael, P; Salters, V.,2003, Physical and petrologic evidence for a two component mantle MORB source. EGS - AGU - EUG Joint Assembly 2003, Nice, France. In Geophysical Research Abstracts, v. 5, EAE03-A-07805.

Michael, P.; Thiede, J.; Langmuir, C.; Jokat, W.; Dick, H.; Snow, J.; Goldstein, S.; Graham, D.; Edmonds, H., 2003, The Arctic Mid-Ocean Ridge Expedition - AMORE 2001. EGS - AGU - EUG Joint Assembly 2003, Nice, France. In Geophysical Research Abstracts, v. 5, EAE03-A-07563.

Dick, H; Lin, J; Schouten, H; Michael, P; Snow, J; Jokat, W., 2003, A New Class of Plate Boundary and Ocean Ridge. EGS - AGU - EUG Joint Assembly 2003, Nice, France. In Geophysical Research Abstracts, v. 5, EAE03-A-07581.

Dick, H.J., Standish, J., Michael, P.J., Lin, J., Schouten, H., 2003, Field Studies of Mantle Melting at Ultra-slow Spreading Ridges. Eos Trans. AGU, 84(46), Fall Meet. Suppl., Abstract V42H-02.

von der Handt, A.; Snow, J.E.; Hellebrand, E.; Dick, H.J.B; Michael, P., 2003, Shallow mantle melt stagnation under Gakkel Ridge. EGS - AGU - EUG Joint Assembly 2003, Nice, France. In Geophysical Research Abstracts, v. 5, EAE03-A-11703.

Langmuir, C; Gier, E; Soffer, G ; Goldstein, S; Michael, P; Lehnert, K; Simons, K., 2003,Petrology and geochemistry of basalts from the Gakkel Ridge. EGS - AGU - EUG Joint Assembly 2003, Nice, France. In Geophysical Research Abstracts, v. 5, EAE03-A-10413 .

Hellebrand, E.; Snow, J.E.; Dick, H.; von der Handt, A.; Michael, P., 2003, Scales and Causes of Chemical Heterogeneity in the Oceanic Mantle: Abyssal Peridotites from Gakkel Ridge. EGS - AGU - EUG Joint Assembly 2003, Nice, France. In Geophysical Research Abstracts, v. 5, EAE03-A-03374.

Graham, D.W., Connelly, D.P., German, C.R., Lupton, J.E., Michael, P.J., Edmonds, H.N., 2002, Helium-3 and Manganese in Hydrothermal Plumes Along the Gakkel Ridge, Arctic Ocean. Eos Trans. AGU, 83(47), Fall Meet. Suppl., Abstract. T52E-07.

Dick, H JB., Lin, J, Michael, P J, Schouten, H, Snow, J E., 2002, Ultra-slow-spreading - A New Class of Ocean Ridge. Eos Trans. AGU, 83(47), Fall Meet. Suppl., Abstract T52E-05.

Hellebrand, E., Snow, J.E., Griselin, M., von der Handt, A., Dick, H.J., Michael, P.J., 2002, Opx-Cpx Trace Element Partitioning in Mid-Ocean-Ridge Melting Residues. Eos Trans. AGU, 83(47), Fall Meet. Suppl., Abstract V72B-1311.

Michael, P.J., 2002, “Lava without the Fizz” – News and Views Commentary. Nature, v. 419, pp. 445–446.

Michael, P.J. and Natland, J.H., 2002, Sulfide Undersaturated Basalts from Mid-Ocean Ridges and Oceanic Plateaus; Implications for Mantle Melting and Heterogeneity. Eos Trans. AGU, 83(47), Fall Meet. Suppl., Abstract V52A-1279.

Hanan, B.B., Graham, D.W. and Michael, P.J., 1994, Highly correlated Pb-He-Sr isotopes in Mid-Atlantic Ridge basalts from 33°S. in: Abstracts of the 8th International Conf. on Geochronology, Cosmochronology and Isotope Geology, U.S. Geol Surv. Circular 1107, p. 125.

Michael, PJ., 1994, Evidence from trace elements and H2O for regionally distinctive sources of depleted MORB: Implications for evolution of the depleted mantle. in: Abstracts of the 1994 V.M. Goldschmidt Conference, Edinburgh, Scotland, Mineralogical Magazine, v. 58A, pp. 607-608.

Hanan, B.B., Graham, D.W. and Michael, P.J., 1994, Highly correlated lead, helium and strontium isotopes in Mid-Atlantic Ridge basalts from a dynamically evolving spreading center. in: Abstracts of the 1994 V.M. Goldschmidt Conference, Edinburgh, Scotland, Mineralogical Magazine, v. 58A, pp. 370-371.

Magenheim, A. J., Spivack, A.J. and Michael, P.J., 1994, Chlorine isotopic composition of oceanic rock and carbonaceous chondrites, in: Abstracts of the 8th International Conf. on Geochronology, Cosmochronology and Isotope Geology, U.S. Geol Surv. Circular 1107, p. 201.

Michael, P.J., Chase, R.L. and Armstrong, R.L., 1994, A combined Pb-Nd-Sr isotopic and trace element study of mid-ocean ridge basalts from Explorer Ridge, northeast Pacific. in: Abstracts of the 8th International Conf. on Geochronology, Cosmochronology and Isotope Geology, U.S. Geol Surv. Circular 1107, p. 217.

Michael, P.J., 1992, Control of trace element differentiation trends in granites by accessory phases, 1992 V.M. Goldschmidt Conference for Geochemistry, abstract volume, p. A69-A70.

Michael, P.J. and Cornell, W.C., 1992, Cl in MORB: Evidence for a spreading rate dependence on assimilation in magma chambers, 1992 V.M. Goldschmidt Conference for Geochemistry, abstract volume, p. A70-71.

Michael, P.J. 1987, The Concentration and Behavior of H2O in the mantle and its role in meta somatism of oceanic and island arc mantle. IUGG, 19th Genrl Assembly, Abstr v. 2 p. 405.


GEOL 1003 Introduction to OceaNography
GEOL 2140 Mineralogy Lab
GEOL 2143 Mineralogy
GEOL 4144 Igneous and Metamorphic Rocks and Processes
GEOL 7113 Plate Tectonics
GEOL 7986 Research and Thesis
MSE 7113 Earth's Physical Environment