Matches in SemOpenAlex for { <https://semopenalex.org/work/W4321120974> ?p ?o ?g. }
- W4321120974 abstract "地球系统科学研究的一个关键点是地球深部与表层系统的联动。深部过程通过火山作用对表层系统产生的重要影响已经取得了许多重要进展,认识比较薄弱的是表层系统如何影响深部的结构、过程和演化。板块俯冲将大量沉积物带入地幔过渡带乃至核幔边界的D”层,可以导致地幔的不均一性。特别是,板块俯冲带入的水通过影响地幔物理性质而增强地幔的熔融和对流能力,进而又在一定程度上影响了地球深部的岩浆活动、变质作用,以及包括板块俯冲在内的构造运动。华北克拉通破坏及其相伴的岩石圈变化可能是水通过板块俯冲而影响深部过程的一个体现。表层系统不仅影响了深部的结构和过程,而且还极大地影响了深部的地质演化。在前寒武纪,古元古代和新元古代两次雪球地球之后形成了巨量的洋底沉积物,这些沉积物进入俯冲带后提高了板块俯冲的润滑性及其速率,进而对该时期活跃的全球构造运动及超大陆形成产生一些影响。在显生宙,4.3亿年后陆地植物的大发展和2亿年以后海洋三大浮游生物的大发展都通过改变沉积物成分而影响深部圈层物质的演化,分别导致碎屑锆石和金伯利岩在一些同位素组成上出现重大转变。这些极少量但非常重要的新认识对人们研究行星地球的运行机制及其地质演化至关重要。表层物质进入地幔关键带是如何进行循环和演化的、水等表层物质是否改变了深部圈层的演化方向及规模,这些都是亟待解决的重大科学难题。而要突破这些难题,需要建立有效的定性和定量化的示踪技术方法体系。" @default.
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- W4321120974 date "2023-02-01" @default.
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- W4321120974 title "Surface system impact on the spatiotemporal evolution of deep Earth" @default.
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- W4321120974 doi "https://doi.org/10.1360/tb-2023-0002" @default.
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