George B. Morgan VI

Electron Microprobe Operator

Ph.D., 1988, University of Oklahoma
M.S., 1986, University of Oklahoma
B.A., 1984, University of Nevada, Las Vegas
B.S., 1983, University of Nevada, Las Vegas

Office: SEC E110
Phone: 405-325-2642
Fax: 405-325-3140
E-mail: gmorgan@ou.edu

Areas of Interest

Electron Microscopy and Microanalysis, Igneous Petrology, Experimental Geochemistry, Materials Science

Research

I am responsible for operation of the electron microprobe laboratory, and consider a modern electron microprobe to be the most useful tool for characterizing multi-component solid materials. One of the joys of working with such a versatile analytical platform is exposure to materials problems from a great variety of scientific disciplines including not only samples from numerous geological settings, but also diverse materials problems spanning the gamut from identifying the constituents of human kidney stones to investigating the nature or failure of fabricated metallic or electronic components.

Courses Taught

Electron Microbeam Methods

Faculty Web Page

http://research.ou.edu/Microprobe/OUEMPLhome.asp

Selected Publications

Morgan GB VI, Acosta-Vigil A, and London D (2008) Diffusive equilibration between hydrous metaluminous-peraluminous haplogranite liquid couples at 200 MPa (H₂O) and alkali transport in granitic liquids. Contributions to Mineralogy and Petrology, 155, 257-269.

Acosta-Vigil A, London D, and Morgan GB VI (2006) Experiments on the kinetics of partial melting of a leucogranite at 200 MPa H₂O and 690-800^oC: Compositional variability of melts during the onset of H₂O-saturated crustal anatexis. Contributions to Mineralogy and Petrology, 151, 539-557.

Acosta-Vigil A, London D, Morgan GB VI, and Dewers TA (2006) Dissolution of quartz, albite, and orthoclase in H₂O-saturated haplogranitic melt at 200 MPa: Diffusive transport properties of granitic melts at crustal anatectic conditions. Journal of Petrology, 47, 231-254.

Morgan GB VI and London D (2005) Phosphorus distribution between potassic alkali feldspar and metaluminous haplogranitic liquid at 200 MPa (H₂O): The effect of undercooling on crystal-liquid systematics. Contributions to Mineralogy and Petrology, 150, 386-402.

Morgan GB VI and London D (2005) The effect of current density on the electron microprobe analysis of alkali aluminosilicate glasses. American Mineralogist, 90, 1131-1138.

Acosta-Vigil A,>London> D, and Morgan GB VI (2005) Contrasting interactions of sodium and potassium with H₂O in haplogranitic liquids and glasses at 200 MPa from hydration-diffusion experiments. Contributions to Mineralogy and Petrology, 149, 276-287.

Acosta-Vigil A, London D, Morgan GB VI, and Dewers TA (2003) Solubility of excess alumina in hydrous granitic melts in equilibrium with peraluminous minerals at 700^o-800^oC and 200 MPa, and applications of the aluminum saturation index. Contributions to Mineralogy and Petrology, 146, 100-119.

Morgan GB VI and London D (2003) Trace element partitioning at conditions far from equilibrium: Ba and Cs distributions between alkali feldspar and undercooled hydrous granitic liquid at 200 MPa. Contributions to Mineralogy and Petrology, 144, 722-738.

Acosta-Vigil A, London D, Dewers TA, and Morgan GB VI (2002) Dissolution of corundum and andalusite in H₂O-saturated haplogranitic melts at 800^oC and 200 MPa: Constraints on diffusivities and the generation of peraluminous melts. Journal of Petrology, 43, 1885-1908.

Morgan GB VI and London D (1999) Crystallization of the Little Three layered pegmatite-aplite dike, Ramona District, California. Contributions to Mineralogy and Petrology, 136, 310-330.

London D, Wolf MB, Morgan GB VI, and MG (1999) Experimental silicate-phosphate equilibria in peraluminous granitic magmas, with a case study of the Albuquerque Batholith at Tres Arroyos, Badajoz, Spain. Journal of Petrology, 40, 215-240.

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