TY  - JOUR
A1  - Schildgen, Taylor F.
A1  - Hoke, Gregory D.
T1  - The topographic evolution of the central andes
JF  - Elements : an international magazine of mineralogy, geochemistry, and petrology
N2  - Changes in topography on Earth, particularly the growth of major mountain belts like the Central Andes, have a fundamental impact on regional and global atmospheric circulation patterns. These patterns, in turn, affect processes such as precipitation, erosion, and sedimentation. Over the last two decades, various geochemical, geomorphologic, and geologic approaches have helped identify when, where, and how quickly topography has risen in the past. The current spatio-temporal picture of Central Andean growth is now providing insight into which deep-Earth processes have left their imprint on the shape of the Earth's surface.
KW  - paleoaltimetry
KW  - stable isotopes
KW  - relief development
KW  - river incision
KW  - landscape evolution
Y1  - 2018
U6  - https://doi.org/10.2138/gselements.14.4.231
SN  - 1811-5209
SN  - 1811-5217
VL  - 14
IS  - 4
SP  - 231
EP  - 236
PB  - Mineralogical Society of America
CY  - Chantilly
ER  - 
TY  - JOUR
A1  - Hoke, Gregory D.
A1  - Garzione, Carmala N.
A1  - Araneo, Diego C.
A1  - Latorre, Claudio
A1  - Strecker, Manfred
A1  - Williams, Kendra J.
T1  - The stable isotope altimeter : do quaternary pedogenic carbonates predict modern elevations?
N2  - Stable isotope altimetry is a useful tool for estimating paleoelevation in sedimentary records. Yet questions remain regarding how source moisture, climate, and local topography can influence these estimates. Here we present stable isotope altimetry results on late Quaternary pedogenic carbonates of known elevation on both flanks of the Andean orogen at 33 degrees S. We measured delta O-18 values of pedogenic carbonates and river water samples from small drainages at regular elevation increments within the Rio Aconcagua (Chile) and Rio Mendoza (Argentina) catchments. The delta O-18 values of river waters correlate well with elevation and show similar isotopic gradients between the Chilean (-3.7 parts per thousand/km) and Argentine (-4.8 parts per thousand/km) sides of the range. Uncertainties associated with scatter in the river water data and assumptions about the temperature of carbonate formation indicate that elevation estimates have 1 sigma errors of 350-450 m. We estimate the isotopic composition of soil water from pedogenic carbonates on both sides of the range by assuming mean annual temperatures based the modern temperature lapse rate from meteorological station data. Combined, our data show that stable isotope altimetry produces reasonable estimates of modern elevation, with the majority of our samples (60%) within the 1 sigma uncertainties and 77% within 2 sigma.
Y1  - 2009
UR  - http://geology.gsapubs.org/
U6  - https://doi.org/10.1130/G30308a.1
SN  - 0091-7613
ER  - 
TY  - JOUR
A1  - Hoke, Gregory D.
A1  - Giambiagi, Laura B.
A1  - Garzione, Carmala N.
A1  - Mahoney, J. Brian
A1  - Strecker, Manfred
T1  - Neogene paleoelevation of intermontane basins in a narrow, compressional mountain range, southern Central Andes of Argentina
JF  - Earth & planetary science letters
KW  - Neogene
KW  - Andes
KW  - surface uplift
KW  - tectonics
KW  - paleoelevation
Y1  - 2014
U6  - https://doi.org/10.1016/j.epsl.2014.08.032
SN  - 0012-821X
SN  - 1385-013X
VL  - 406
SP  - 153
EP  - 164
PB  - Elsevier
CY  - Amsterdam
ER  -