M. Charles Gilbert

Former Director and Eberly Family Chair Professor

  Ph.D. 1965, University of California at Los Angeles
  M.S. 1961, University of Oklahoma
  B.S. 1958, University of Oklahoma

mcgilbert@ou.edu

Igneous and Metamorphic Rock Systems

My interests have included 1) stability relations of the rock-forming ferromagnesian minerals, especially amphiboles, pyroxenes, and micas; 2) processes active in the evolution of igneous and metamorphic rock systems; and 3) petrology and tectonic development of rifts, particularly as exemplified by the Southern Oklahoma Aulacogen. Much of my work lately has centered around attempts to understand the emplacement of the Cambrian igneous floor of the Southern Oklahoma Aulacogen through study of the outcrops in the Wichita Mountains, effectively combining all the interests noted above.

Earlier experimental investigations of various endmember amphiboles yielded insight on the effect of such parameters as oxygen, sulfur, and fluorine fugacities, and higher total pressure, on mineral stability relations. Amphibole chemistry along with the co-existing mineral assemblages can, in turn, provide one window into rock-forming processes. Combining information on mineral chemistry with order of crystallization leads to models of low pressure (shallow depth) crystallization at high temperatures under relatively dry conditions for many granite bodies emplaced in extensional terranes.

The granite bodies of some rift zones, such as the Southern Oklahoma Aulacogen (SOA), appear to have the shape of sheets rather than the bulbous forms associated with compressional orogenic belts such as the Sierra Nevada. Applying the concepts of crustal magma traps to the geometry of the crustal column and of magma driving pressure rationalizes the geometries of the intrusive bodies in extension setings. Scientific drilling is being targeted toward understanding how the evolution of the SOA fits into the development of southern Laurentia.

My teaching has included undergraduate courses in petrology, physical geology, environmental geology, Earth history, field methods, and graduate courses in igneous and metamorphic rock systems, phase equilibrium, and experimental geochemistry, as well as advanced problem seminars and advanced field topics

Selected Publications

Soreghan, G. S., and Gilbert, M. C., 2006, The end of the Ancestral Rockies: Geological Society of America Abstracts with Program, v.38, #1, p.36.

Ahern, J., and Gilbert, M. C., 2006, Unusal circular structures in southern Oklahoma: Geological Society of America Abstracts with Program, v.38, #1, p.36.

London, D., and Gilbert, M. C., 2006, Interpreting textures of granitic and gabbroic rocks, Wichita Mountains, Oklahoma: Geological Society of America, South- Central Section Field Trip Guidebook.

Gilbert, M. C.,, 2005, How current understanding of basement outcrops in Oklahoma can help decipher later geologic history: Meeting Program, 2005 AAPG Mid-Continent Section Meeting, Oklahoma City, p.23.

Gilbert, M. C., 2004, Final movements associated with late Ancestral Rockies deformation: Geological Society of American Abstracts with Programs, v.36, #5, p.509.

Gilbert, M. C., 2003, Comparison of continental paleo- and neo-rifts: Geological Society of America Abstracts with Program, v. 35, #6, p.557l

Gilbert, M. C., and Hogan, J. P., 2002, Reconciling mineralogy and chemistry in Quanah Granite, Wichita Mountains, Oklahoma: Programme with Abstracts, 18th General Meeting of the International Mineralogical Association, Edinburgh, p.248.

Katz, O., Gilbert, M.C., Reches, Z., and Roegiers, J-C., 2001, Mechanical properties of Mount Scott Granite: Wichita Mountains, Oklahoma: Oklahoma Geology Notes, Oklahoma Geological Survey, v. 61, #2, 28-34.

Hogan, J. P., Gilbert, M. C., and Price, J. D., 2000, Crystallization of fine- and coarse-grained A-type granite sheets of the Southern Oklahoma Aulacogen, U.S.A.: Transactions, Royal Society of Edinburgh, v.91, pts. 1 & 2, 139-150.

Miller, C. L., and Gilbert, M. C., 2000, Relationship of thematic mapper images to geologic mapping of the eastern Wichita Mountains, Oklahoma: Proceedings of 14th Conference on Applied Geologic Remote Sensing, Las Vegas, Nevada, 486-492.

Price, J.D., Hogan, J.P., Gilbert, M.C., London, D., and Morgan, G. B., VI, 1999, Experimental study of titanite-fluorite equilibria in the A-type Mount Scott Granite: implications for assessing F contents of felsic magma: Geology, 27, #10, 951-954.

Gilbert, M.C., and Denison, R.E.,1999, Exposed basement rock of Oklahoma: geology and economic use, in Johnson, K. S. (ed.), Proceedings of the 34th Forum on the Geology od Industrial Minerals, 1998, Oklahoma Geological Survey Circular 102, 25-36.

Hogan, J.P., Price, J.D., and Gilbert, M.C., 1998, Magma traps and driving pressure: consequences for pluton shape and emplacement in an extensional regime, Journal of Structural Geology, 20, #9/10, pp. 1155-1168.

Hogan, J.P. and Gilbert, M.C., 1997, The intrusive style of A-type sheet granites from the Southern Oklahoma Aulacogen: p. 299-311 in Middle Proterozoic to Cambrian rifting: Mid-North America: Ojakangas, R.W., Dickas, A.B., and Green, J.C. (eds), Geological Society of America Special Publication 312, 322pp.

Price, J.D, Hogan, J.P., and Gilbert, M.C., 1996, Rapakivi texture in the Mount Scott Granite, Wichita Mountains, Oklahoma: European Journal of Mineralogy, 8, 435-451.

Hogan, J.P. and Gilbert, M.C., 1995, The A-type Mount Scott Granite sheet: Importance of crustal magma traps: Journal of Geophysical Research, 100, B8, 15,779-15,792.

Gilbert, M.C., and Denison, R.E., 1993, Late Proterozoic to Early Cambrian Basement of Oklahoma: 303-314p. in the Geology of North American, v. C-2, Precambrian: Conterminous U.S., Geological Society of America, 657pp.

Huckenholz, H.G. Gilbert, M.C. and Kunzmann, T., 1992, Stability and phase relations of calcic amphiboles crystallized from magnesio-hasting site compositions in the 1 to 45 kbar pressure range: Neues Jahrbuch f¨autu;r Mineralogie, Abh, 164, 2/3, 229-268.

Gilbert, M.C., 1992, Speculations on the origin of the Anadarko Basin: pp 195-208 in Mason, R. (ed), International Basement Tectonics Association Publication No. 7, Kluwer Academic Publishers, 480pp.

McConnell, D.A., and Gilbert, M.C., 1990, Cambrian extensional tectonics and magmatism within the Southern Oklahoma Aulacogen: Tectonophysics, 174, 147-157.

Lambert, D.D., Unruh, D.M., and Gilbert, M.C., 1988, Rb-Sr and Sm-Nd isotopic study of the Glen Mountains layered complex: Initiation of rifting within the Southern Oklahoma Aulacogen: Geology, 16, 13-17.

Gilbert, M.C., and Powell, B.N., 1988, Igneous geology of the Wichita Mountains, southwestern Oklahoma: 109-126 p. in Hayward, O.T. (editor), South-central Section of the Geological Society of America, Boulder, Colorado, Geological Society of America Centennial Field Guide, 4, (468 pp.).

	School of Geology and Geophysics
Prospective Undergraduates What are Geology and Geophysics? What do Geologists and Geophysicists do? Why do we need Geologists and Geophysicists? You might be a Geologist or Geophysicist if you... Why study Geology and Geophysics at OU? Scholarships Degrees Offered Areas Of Emphasis Prospective Graduate Students Areas of Emphasis Degrees Offered Admissions Assistantships and Fellowships Successful Graduates Field Trips Recruiting Current Students Student Organizations Geology Courses Geophysics Courses OU Course Catalog CEE Student Services Registration Degree Navigator Mission People Faculty Staff Students Research Areas of Emphasis Laboratories Alumni School Policies, Forms, and Archives	M. Charles Gilbert Former Director and Eberly Family Chair Professor Ph.D. 1965, University of California at Los Angeles M.S. 1961, University of Oklahoma B.S. 1958, University of Oklahoma mcgilbert@ou.edu Igneous and Metamorphic Rock Systems My interests have included 1) stability relations of the rock-forming ferromagnesian minerals, especially amphiboles, pyroxenes, and micas; 2) processes active in the evolution of igneous and metamorphic rock systems; and 3) petrology and tectonic development of rifts, particularly as exemplified by the Southern Oklahoma Aulacogen. Much of my work lately has centered around attempts to understand the emplacement of the Cambrian igneous floor of the Southern Oklahoma Aulacogen through study of the outcrops in the Wichita Mountains, effectively combining all the interests noted above. Earlier experimental investigations of various endmember amphiboles yielded insight on the effect of such parameters as oxygen, sulfur, and fluorine fugacities, and higher total pressure, on mineral stability relations. Amphibole chemistry along with the co-existing mineral assemblages can, in turn, provide one window into rock-forming processes. Combining information on mineral chemistry with order of crystallization leads to models of low pressure (shallow depth) crystallization at high temperatures under relatively dry conditions for many granite bodies emplaced in extensional terranes. The granite bodies of some rift zones, such as the Southern Oklahoma Aulacogen (SOA), appear to have the shape of sheets rather than the bulbous forms associated with compressional orogenic belts such as the Sierra Nevada. Applying the concepts of crustal magma traps to the geometry of the crustal column and of magma driving pressure rationalizes the geometries of the intrusive bodies in extension setings. Scientific drilling is being targeted toward understanding how the evolution of the SOA fits into the development of southern Laurentia. My teaching has included undergraduate courses in petrology, physical geology, environmental geology, Earth history, field methods, and graduate courses in igneous and metamorphic rock systems, phase equilibrium, and experimental geochemistry, as well as advanced problem seminars and advanced field topics Selected Publications Soreghan, G. S., and Gilbert, M. C., 2006, The end of the Ancestral Rockies: Geological Society of America Abstracts with Program, v.38, #1, p.36. Ahern, J., and Gilbert, M. C., 2006, Unusal circular structures in southern Oklahoma: Geological Society of America Abstracts with Program, v.38, #1, p.36. London, D., and Gilbert, M. C., 2006, Interpreting textures of granitic and gabbroic rocks, Wichita Mountains, Oklahoma: Geological Society of America, South- Central Section Field Trip Guidebook. Gilbert, M. C.,, 2005, How current understanding of basement outcrops in Oklahoma can help decipher later geologic history: Meeting Program, 2005 AAPG Mid-Continent Section Meeting, Oklahoma City, p.23. Gilbert, M. C., 2004, Final movements associated with late Ancestral Rockies deformation: Geological Society of American Abstracts with Programs, v.36, #5, p.509. Gilbert, M. C., 2003, Comparison of continental paleo- and neo-rifts: Geological Society of America Abstracts with Program, v. 35, #6, p.557l Gilbert, M. C., and Hogan, J. P., 2002, Reconciling mineralogy and chemistry in Quanah Granite, Wichita Mountains, Oklahoma: Programme with Abstracts, 18th General Meeting of the International Mineralogical Association, Edinburgh, p.248. Katz, O., Gilbert, M.C., Reches, Z., and Roegiers, J-C., 2001, Mechanical properties of Mount Scott Granite: Wichita Mountains, Oklahoma: Oklahoma Geology Notes, Oklahoma Geological Survey, v. 61, #2, 28-34. Hogan, J. P., Gilbert, M. C., and Price, J. D., 2000, Crystallization of fine- and coarse-grained A-type granite sheets of the Southern Oklahoma Aulacogen, U.S.A.: Transactions, Royal Society of Edinburgh, v.91, pts. 1 & 2, 139-150. Miller, C. L., and Gilbert, M. C., 2000, Relationship of thematic mapper images to geologic mapping of the eastern Wichita Mountains, Oklahoma: Proceedings of 14th Conference on Applied Geologic Remote Sensing, Las Vegas, Nevada, 486-492. Price, J.D., Hogan, J.P., Gilbert, M.C., London, D., and Morgan, G. B., VI, 1999, Experimental study of titanite-fluorite equilibria in the A-type Mount Scott Granite: implications for assessing F contents of felsic magma: Geology, 27, #10, 951-954. Gilbert, M.C., and Denison, R.E.,1999, Exposed basement rock of Oklahoma: geology and economic use, in Johnson, K. S. (ed.), Proceedings of the 34th Forum on the Geology od Industrial Minerals, 1998, Oklahoma Geological Survey Circular 102, 25-36. Hogan, J.P., Price, J.D., and Gilbert, M.C., 1998, Magma traps and driving pressure: consequences for pluton shape and emplacement in an extensional regime, Journal of Structural Geology, 20, #9/10, pp. 1155-1168. Hogan, J.P. and Gilbert, M.C., 1997, The intrusive style of A-type sheet granites from the Southern Oklahoma Aulacogen: p. 299-311 in Middle Proterozoic to Cambrian rifting: Mid-North America: Ojakangas, R.W., Dickas, A.B., and Green, J.C. (eds), Geological Society of America Special Publication 312, 322pp. Price, J.D, Hogan, J.P., and Gilbert, M.C., 1996, Rapakivi texture in the Mount Scott Granite, Wichita Mountains, Oklahoma: European Journal of Mineralogy, 8, 435-451. Hogan, J.P. and Gilbert, M.C., 1995, The A-type Mount Scott Granite sheet: Importance of crustal magma traps: Journal of Geophysical Research, 100, B8, 15,779-15,792. Gilbert, M.C., and Denison, R.E., 1993, Late Proterozoic to Early Cambrian Basement of Oklahoma: 303-314p. in the Geology of North American, v. C-2, Precambrian: Conterminous U.S., Geological Society of America, 657pp. Huckenholz, H.G. Gilbert, M.C. and Kunzmann, T., 1992, Stability and phase relations of calcic amphiboles crystallized from magnesio-hasting site compositions in the 1 to 45 kbar pressure range: Neues Jahrbuch f¨autu;r Mineralogie, Abh, 164, 2/3, 229-268. Gilbert, M.C., 1992, Speculations on the origin of the Anadarko Basin: pp 195-208 in Mason, R. (ed), International Basement Tectonics Association Publication No. 7, Kluwer Academic Publishers, 480pp. McConnell, D.A., and Gilbert, M.C., 1990, Cambrian extensional tectonics and magmatism within the Southern Oklahoma Aulacogen: Tectonophysics, 174, 147-157. Lambert, D.D., Unruh, D.M., and Gilbert, M.C., 1988, Rb-Sr and Sm-Nd isotopic study of the Glen Mountains layered complex: Initiation of rifting within the Southern Oklahoma Aulacogen: Geology, 16, 13-17. Gilbert, M.C., and Powell, B.N., 1988, Igneous geology of the Wichita Mountains, southwestern Oklahoma: 109-126 p. in Hayward, O.T. (editor), South-central Section of the Geological Society of America, Boulder, Colorado, Geological Society of America Centennial Field Guide, 4, (468 pp.).