Geodynamics of a Cordilleran Orogenic System: The Central Andes of Argentina and Northern Chile

Low-temperature thermochronologic trends across the central Andes, 21°S–28°S
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Published:January 01, 2015
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P.W. Reiners, S.N. Thomson, A. Vernon, S.D. Willett, M. Zattin, J. Einhorn, G. Gehrels, J. Quade, D. Pearson, K.E. Murray, W. Cavazza, 2015. "Low-temperature thermochronologic trends across the central Andes, 21°S–28°S", Geodynamics of a Cordilleran Orogenic System: The Central Andes of Argentina and Northern Chile, Peter G. DeCelles, Mihai N. Ducea, Barbara Carrapa, Paul A. Kapp
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In this paper, we merge more than 200 new apatite and zircon (U-Th)/He analyses and 21 apatite fission-track analyses from 71 new samples with previous published thermochronologic data using the same systems to understand the growth and large-scale kinematics of the central Andes between 21°S and 28°S. In general, minimum dates decrease and the total range of dates increases from west to east across the range. Large variations in thermochronometer dates on the east side reflect high spatial gradients in depth of recent erosional exhumation. Almost nowhere in this part of the Andes has Cenozoic erosion exceeded ~6–8 km, and...
- absolute age
- Andes
- apatite
- Cenozoic
- dates
- Eastern Cordillera
- erosion
- exhumation
- fission-track dating
- geochronology
- low temperature
- nesosilicates
- orthosilicates
- Paleogene
- phosphates
- silicates
- South America
- temperature
- Tertiary
- thermochronology
- (U-Th)/He
- zircon
- zircon group
- Cordillera de Domeyko
- Loma Amarilla Formation