山脉隆升驱动硅酸盐风化机制研究进展

Mountain Building and Silicate Weathering:A Review and Perspectives

山脉隆升与气候变化的关系是近几十年来的研究热点。自20世纪80年代著名的“构造抬升驱动气候变冷”假说在提出以来,山脉隆升通过硅酸盐风化驱动百万年尺度气候变化的观点已深入人心。尽管许多大陆风化记录已经建立,但它们往往存在多解性,难以直接验证该假说。这激发了大量从现代过程角度验证该假说的研究,但部分研究发现山地流域的风化不受物理剥蚀过程控制,因此不太可能响应构造活动而发生变化,与“构造抬升驱动气候变冷”假说的核心观点相矛盾。文章综述了山脉隆升驱动硅酸盐风化机制研究的相关进展并分析了这一矛盾产生的原因,探讨了异地风化作为解决该矛盾的新风化机制的可能性,并初步展望了异地风化研究领域的机遇和挑战。

The relationship between mountain uplift and climate change has been a prominent focus of research in recent decades.Since the emergence of the famous“uplift-weathering”hypothesis in the 1980s,which suggests that tectonic uplift of mountains drives climate change over millions of years through silicate weathering,significant attention has been directed towards this concept.Extensive continental denudation and weathering records have been established to test this hypothesis.Despite the majority of these records aligning with the hypothesis,the presence of alternative interpretations complicates direct hypothesis testing.Consequently,numerous studies have explored contemporary weathering processes to better understand this relationship.However,these studies have unveiled that weathering in mountainous regions is not primarily controlled by physical denudation processes and is unlikely to fluctuate in response to tectonic activities.This challenges the fundamental premise of the“upliftweathering”hypothesis.This paper conducts a comprehensive review and analysis to elucidate the reasons for this contradiction.Moreover,it examines the potential of non-local weathering in floodplains as a novel weathering mechanism to resolve this inconsistency.Additionally,it delves into the opportunities and challenges within the realm of non-local weathering research.