Duncan Keller

Visiting Assistant Professor

Email: dskeller@skidmore.edu
Phone: (518) 580-5192
Office Location: CIS 280C

EDUCATION

• Ph.D. 2021, Earth and Plaentary Sciences, Yale University
• MPhil. 2017, Geology and Geophysics, Yale University
• B.A, 2015, Geology, Colgate University

COURSES TAUGHT AT SKIDMORE

• GE209 Earth Materials
• GE251-C Topics in Geophysics

PUBLICATIONS

Keller, D.S. and Lee, C.-T.A. Major slab melting events throughout the Proterozoic eon revealed by Sr and Nd isotopic systematics of massif-type anorthosites. In review at Earth and Planetary Science Letters.

Lee, C.-T.A., Keller, D.S., Dasgupta, R., Siebach, K., McGovern, P., Borchardt, J., and Zhang, J. (2025) Crustal thickness effects on chemical differentiation and hydrology on Mars. Earth and Planetary Science Letters, 651, 119155. https://doi.org/10.1016/j.epsl.2024.119155.

Ague, J.J., Keller, D.S., Ackerson, M.R., and Holycross, M. (2024) Titanium Substitutions in Garnet at Magmatic, Granulite Facies, and High-Pressure Granulite Facies Conditions. American Mineralogist (early publication). https://doi.org/10.2138/am-2024-9442

Keller, D.S., Lee, C.-T.A., Peck, W.H., Monteleone, B.D., Martin, C., Vervoort, J.D. and Bolge, L (2024). Mafic slab melt contributions to Proterozoic massif-type anorthosites. Science Advances, 10, eadn3976. https://doi.org/10.1126/sciadv.adn3976 

Tassara, S., Ague, J.J., Keller, D.S., Rooney, A.D., Wostbrock, J., Axler, J.A., and Tardani, D. (2024) Osmium and oxygen isotope constraints on magma-crust interactions and the transport of copper at the roots of arcs. Chemical Geology, 664, 122301. https://doi.org/10.1016/j.chemgeo.2024.122301

Keller, D.S., Tassara, S., Robbins, L.J., Lee, C.-T.A., Ague, J.J. and Dasgupta, R. (2023) Links between large igneous province volcanism and subducted iron formations. Nature Geoscience, 16, 527– 533. https://www.nature.com/articles/s41561-023-01188-1 Keller, D.S. and Ague, J.J. (2022b) Predicting and explaining crystallographic orientation relationships of exsolution lamellae in garnet using the edge-to-edge matching model. Journal of Metamorphic Geology, 40, 1189–1218. https://onlinelibrary.wiley.com/doi/epdf/10.1111/jmg.12662

Keller, D.S. and Ague, J.J. (2022a) Possibilities for misidentification of natural diamond and coesite in metamorphic rocks. Neues Jahrbuch für Mineralogie - Abhandlungen (Journal of Mineralogy and Geochemistry), 197, 3. https://doi.org/10.1127/njma/2021/0313

Keller, D.S. and Ague, J.J. (2020) Quartz, mica, and amphibole exsolution from majoritic garnet reveals ultra-deep sediment subduction, Appalachian orogen. Science Advances, 6, 11, eaay5178.
https://www.science.org/doi/10.1126/sciadv.aay5178

Keller, D.S. and Ague, J.J. (2019) Crystallographic and textural evidence for solid-state precipitation of rutile, ilmenite, corundum, and apatite lamellae from garnet. American Mineralogist, 104, 980– 995.
https://doi.org/10.2138/am-2019-6849

Keller, D.S. and Ague, J.J. (2018) High-pressure granulite facies metamorphism (~1.8 GPa) revealed in silica-undersaturated garnet-spinel-corundum gneiss, Central Maine Terrane, Connecticut, U.S.A. American Mineralogist, 103, 1851–1868.
https://doi.org/10.2138/am-2018-6543