Research Areas: South America


Chile


The amazing copao fruit from the cacti of the Rio Elqui Valley, Chile. photo by Greg Hoke

From its three order of magnitude N-S change in precipitation to the 5000 m of relief from sea level to the crest of the Andes, Chile is a land of contrasts. With these kinds of gradients Chile is another one of South America's amazing natural laboratories for Earth Science. Professor Hoke has worked in Chile since 2000 and the ES&T group started working in Chile again in 2010 in collaboration with Kate Huntington (U. Washington), Claudio Latorre (P. Univ. de Chile), Francisca Diaz (P. Univ. de Chile) and graduate students from the University of Washington and SU. Here in Chile, we are taking advantage of the extreme 4700 m of relief from La Serena to the Paso de Agua Negra that leads Argentina's San Juan Province as a site to calibrate the clumped isotope geothermometer in modern soils and improve our understanding of the process of desert soil formation. We are also exploring the effect of long duration carboante accumulation on clumped isotope temperatures by exploiting well dated wave-cut terraces near Tongoy, Chile.


Check back for our first results from our current NSF Low Temperature Geochemistry and Geobiology sponsored project. 




Prior research in Chile sponsored by NSF award OISE-0601957 and incude the following publications:

    • Hoke, G.D., Aranibar, J.N.,Viale,M., Araneo, D.C., Llano, C., 2013, Seasonal moisture sources and the isotopic composition of precipitation, rivers and carbonates across the Andes at 32.5 - 35.5°S: Geochemistry, Geophysics, Geosystems, v. 14, p. 962-978, doi:10.1002/ggge.20045
    • Hoke, G.D., Garzione, C.N., Araneo, D.C., Latorre, C., Strecker, M.R., and *Williams, K.J., 2009, The stable isotope altimeter: Do Quaternary pedogenic carbonates predict modern elevations?: Geology, 37(11), p. 1015-1018,doi: 10.1130/G30308A.1

Other research in Chile, from Prof. Hoke's doctoral and postdoctoral work incude the following publications:

    •  Jordan, T.E., Nester, P. L., Blanco, N., Hoke, G. D., Davila, F. M., and Tomlinson, A.J., 2010, Uplift of the Altiplano-Puna Plateau: A view from the west: Tectonics,vol. 29 (5) pp. TC5007, doi: 10.1029/2010TC002661.

    • Hoke, G.D., Garzione, C.N., Araneo, D.C., Latorre, C., Strecker, M.R., and *Williams, K.J., 2009, The stable isotope altimeter: Do Quaternary pedogenic carbonates predict modern elevations?: Geology, 37(11), p. 1015-1018,doi: 10.1130/G30308A.1

    • Garzione, C. N., Hoke, G. D., Labarkin, J. C., Withers, S., MacFadden, B. J., Ghosh, P., and Mulch, A., 2008, Rise of the Andes: Science, 320, p. 1304-1307. doi:10.1126/science.1148615

    • Hoke, G. D. and Garzione, C. N., 2008, Paleosurfaces, paleoelevation, and the mechanisms for the latest Miocene topographic development of the Altiplano Plateau: Earth and Planetary Science Letters, v. 271, no. 1-4, p. 192-201, doi:10.1016/j.epsl.2008.04.008

    • Hoke, G. D., Isacks, B. L., Jordan T.E., Tomlinson, A.J., Blanco Pavez, N., and Razmezani, J., 2007, Geomorphic evidence for post-10 Ma uplift of the western flank of the central Andes 18°30'22°S: Tectonics 26 doi:10.1029/2006TC002082

    • Loveless, J. P., Hoke, G. D., Allmendinger, R. W., Gonzalez, G., Isacks, B. L., and Carrizo, D. A., 2005, Pervasive cracking of the northern Chilean Coastal Cordillera: New evidence for forearc extension: Geology, 33(12) p. 973-976. doi:10.1130/G22004.1

    • Allmendinger, R. W., Gonzalez, G, Yu, J, Hoke, G. and Isacks, B., 2005, Trench Parallel Shortening in the Northern Chilean Forearc: Tectonic and Climatic Implications: Geological Society of America Bulletin 116(1-2), doi:10.1130/B25505.1

    • Hoke, G. D., Isacks B. L, Jordan T. E. and Yu, J. S., 2004, A groundwater origin for the giant quebradas of northern Chile: Geology 32 (7), p. 605-608. doi: 10.1130/G20601.1




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Department of Earth Sciences
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