地质学报2024，Vol.98Issue(3)：662-679,18.DOI:10.19762/j.cnki.dizhixuebao.2024017
地幔不均一性与地幔循环的多维表征和原因思考
Multidimensional characterization and causes of mantle heterogeneity and mantle cycle
摘要
Abstract
The mantle experienced core-mantle-crust differentiation in its early stages,followed by convection circulation at various scales,resulting in mantle heterogeneity.Overthe past three decades,the study of oceanic basalt has gradually established a comprehensive geochemical system of the mantle,revealing the presence of various mantle end members and non-radioactive isotopic evidence,confirmingthe existence of mantle heterogeneity.However,the relationship between mantle heterogeneity and mantle cycling in terms of time and space scales remains unclear,as well as the evolutionary history and laws governing mantle heterogeneity.Geophysical studies have provided evidence for the spatial heterogeneity of the traversal convective system through observations of differences in thickness of the upper mantle lithosphere between the ocean and the continent,velocity anomalies in the middle and lower mantle,and the morphology of subduction plates.The combination of geochemical and geophysical methods is crucial for studying mantle heterogeneity,and it has been widely accepted to use this"binocular"approach to better understand the composition and structure of the mantle.This paper considers the internal logic of the superficial supercontinent cycle and mantle heterogeneity by integrating different manifestations of the geochemical field and geophysics,and contrasting oceanic and continental patterns in both present and historical periods.The significance of mantle heterogeneity in the context of global evolution is emphasized,and the potential for establishing amantle cycle driving model through multiple approaches is proposed.关键词
地幔循环/地幔不均一性/地球化学场/地球物理场/超大陆旋回Key words
mantle cycling/mantle heterogeneity/geochemical field/geophysical field/supercontinental cycles引用本文复制引用
郑建平,刘为先,王伟,马强,吴树成,戴宏坤..地幔不均一性与地幔循环的多维表征和原因思考[J].地质学报,2024,98(3):662-679,18.基金项目
本文为国家重点研发计划项目(编号2023YFF0804404)和国家自然科学基金重点国际合作项目(编号42320104001)资助的成果. （编号2023YFF0804404）
