Miocene development of alpine glacial relief in the Patagonian Andes, as revealed by low-temperature thermochronometry

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• 作者：Elizabeth C. Christeleit^a ; ^{elizabeth.christeleit@yale.edu} ; Mark T. Brandon^a ; David L. Shuster^b ; ^c
• 关键词：apatite ; (U&ndash ; Th)/He thermochronometry ; 4He/3He ; Patagonian Andes ; glacial erosion ; landscape evolution
• 刊名：Earth and Planetary Science Letters
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：460
• 期：Complete
• 页码：152-163
• 全文大小：3193 K
• 卷排序：460

文摘

Thermal–kinetic model reveals the resolution of apatite (U–Th)/He and 4He/3He data. Our data require that glacial erosion in the Patagonian Andes proceeded rapidly during early glaciations. Formation of valley relief is the primary change in regional topography since ∼10 Ma. Valley relief in the Patagonian Andes was eroded early, during the late Miocene, and not during the mid-Pleistocene transition. Chile triple junction migration has a minor effect on the temperature of the shallow crust.