Jennifer Witter(web)

Jennifer Witter, Ph.D.

Term Assistant Professor of Geological Sciences
Office: NSB218
Phone: (907) 786-6865
Email: jpwitter@uaa.alaska.edu

Biography

 Dr. Witter has been a term assistant professor for UAA Geological Sciences since August, 2011.  She received her B.A. in Geology from the University of California, Santa Cruz in 1991. In 1999 she completed he Ph.D. in Igneous Petrology from the University of Oregon under the supervision of Dr. A. Dana Johnston. Her dissertation research involved "High Pressure Experimental Studies of Melting within Continental Crust and Beneath Mid-Ocean Ridges." Dr. Witter completed the single subject secondary education credential program from Pacific Union College in 2004.  From 2006 to 2011 she taught high school science and chemistry in both California and Oregon until June 2011.

Teaching Responsibilites

  • Physical Geology A111 (Lab and Lecture)
  • Research Methods
  • Advanced Petrology

Research Interests

  •  Post-Doctoral Researcher, University of California, Davis, 1999-2001
    • Worked with Dr. Charles E. Lesher, conducting high pressure melting experiments on peridotite using the multi-anvil apparatus
    • Assisted in the calibration of the Getting cubic anvil apparatus using high-pressure resistivity changes in thallium metal
    • Conducted simultaneous melting and pressure-calibration experiments using the proton beam at Argonne National Laboratory
    • Created all sample charges and thermocouples using machine tools and arc welder
    • Characterized the mineralogy of experimental run products using an electron microprobe
     
  • Graduate Research Fellow, University of Oregon, 1995-1999
    • Advised on dissertation research by Dr. A. Dana Johnston, conducting high pressure (1 Gpa) partial melting experiments using 1/2” piston-cylinder apparatus
    • Conducted experiments on peridotite to determine the effect of mineral mode on the melt productivity and composition of partial melts
    • Conducted experiments on meta-pelite to provide constraints on the origin of boron-rich granites from the Black Hills, South Dakota
    • Assisted in the determination of the thermal gradient in the 1/2” piston-cylinder apparatus using double-thermocouple experiments
    • Created all sample charges and thermocouples using machine tools and arc welder
    • Characterized the mineralogy of experimental run products using an electron microprobe
    • Published results in three peer-reviewed journal publications, and presented findings in posters and talks at numerous professional meetings, including one invited talk 

    Publications

    Selected Publications, Talks, and Posters
    • Pickering-Witter, JM, and Johnston, AD (2000) The effects of variable mineral proportions on the melting systematics of fertile peridotite assemblages. Contributions to Mineralogy and Petrology v. 140, 190-211.
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    • Pickering, JM, and Johnston, AD (1998) Fluid-absent melting behavior of a two-mica metapelite: Experimental constraints on the origin of Black Hills granite. Journal of Petrology, v. 39, 1787-1804.
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    • Pickering, JM, Schwab, BE, and Johnston, AD (1998) Off-center hot spots: Double thermocouple determination of the thermal gradient in a 1.27 cm (1/2 in.) CaF2 piston-cylinder furnace assembly. American Mineralogist, v. 83, 228-235.
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    • Pickering-Witter, J, Schwab, BE, and Johnston, AD (1999) Melting systematics at 1.0 GPa of modally variable peridotites with a focus on near-solidus pyroxene compositions, Invited talk, American Geophysical Union
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    • Pickering-Witter, J, and Lesher, CE (1999) Melting systematics of a clinopyroxene-rich peridotite at 3.6 GPa. American Geophysical Union
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    • Pickering, JM, Schwab, BE, and Johnston, AD (1998) The effects of variable mode on the melt productivity of fertile peridotitic assemblages, American Geophysical Union
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    • Pickering, JM, and Johnston, AD (1997) The effect of variable mode on melt productivity from compositionally fertile peridotites, American Geophysical Union
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    • Schwab, BE, Pickering, JM, and Johnston, AD (1996) Off-center hotspots: Double thermocouple measurements of the thermal gradient in ½” piston-cylinder assemblies. American Geophysical Union
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    • Pickering, JM, and Johnston, AD (1996) Experimental Constraints on the origin of Black Hills granite, Geological Society of America