Metamorphic decarbonation, silicate weathering and the long-term carbon cycle

被引:84
作者
Bickle, MJ
机构
[1] Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, Downing Street
关键词
D O I
10.1111/j.1365-3121.1996.tb00756.x
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The seawater Sr-87/Sr-86 curve implies a 50-100 Myr episodicity in weathering rate which requires a corresponding variation in CO2 degassing from the solid earth to the atmosphere. It is proposed that this is caused by orogenesis, which both produces CO2 as a result of metamorphic decarbonation reactions, and consumes extra CO2 as a consequence of erosion-enhanced weathering. Global climate on the geological time-scale is therefore controlled by the difference between the relatively large and variable orogenic-moderated degassing and weathering CO2 fluxes.
引用
收藏
页码:270 / 276
页数:7
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