DOI: 10.1038/NGEO2429
论文题名: A climate signal in exhumation patterns revealed by porphyry copper deposits
作者: Yanites B.J. ; Kesler S.E.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期: 6 起始页码: 462
结束页码: 465
语种: 英语
Scopus关键词: Cenozoic
; climate signal
; copper
; exhumation
; mineral deposit
; orogeny
; plate tectonics
; porphyry
; tectonic setting
; uplift
英文摘要: The processes that build and shape mountain landscapes expose important mineral resources. Mountain landscapes are widely thought to result from the interaction between tectonic uplift and exhumation by erosion1. Both climate and tectonics affect rates of exhumation, but estimates of their relative importance vary2,3. Porphyry copper deposits are emplaced at a depth of about 2 km in convergent tectonic settings; their exposure at the surface therefore can be used to track landscape exhumation. Here we analyse the distribution, ages and spatial density of exposed Cenozoic porphyry copper deposits using a global data set4 to quantify exhumation. We find that the deposits exhibit young ages and are sparsely distributed-both consistent with rapid exhumation-in regions with high precipitation, and deposits are older and more abundant in dry regions. This suggests that climate is driving erosion and mineral exposure in deposit-bearing mountain landscapes. Our findings show that the emplacement ages of porphyry copper deposits provide a means to estimate long-term exhumation rates in active orogens, and we conclude that climate-driven exhumation influences the age and abundance of exposed porphyry copper deposits around the world. © 2015 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106185
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: University of Idaho, Department of Geological Sciences, Moscow, IA, United States; University of Michigan, Department of Earth and Environmental Sciences, Ann Arbor, MI, United States
Recommended Citation:
Yanites B.J.,Kesler S.E.. A climate signal in exhumation patterns revealed by porphyry copper deposits[J]. Nature Geoscience,2015-01-01,8(6)