Metamorphic decarbonation, silicate weathering and the long-term carbon cycle
Metamorphic decarbonation, silicate weathering and the long-term carbon cycle
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DOI：
10.1111/j.1365-3121.1996.tb00756.x
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发表时间：
1996-01-01
期刊：
影响因子：
2.4
通讯作者：
Bickle, MJ
中科院分区：
文献类型：
--
作者：
Bickle, MJ
海水Sr-87/Sr-86曲线表明，风化速率为50-100百万年，这需要相应的变化，从固体地球到大气中的CO2脱气。有人提出，这是由造山作用，既产生CO2作为变质脱碳酸反应的结果，并消耗额外的CO2作为侵蚀增强风化的结果。因此，地质时间尺度上的全球气候是由相对较大的和可变的造山-缓和脱气和风化CO2通量之间的差异控制的。
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.