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华南东部晚中生代岩石圈减薄机制的研究综述
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Abstract:
中国东部在中生代晚期经历了显著的岩石圈减薄过程，这一地质事件与区域广泛发育的强烈岩浆活动表现出明显的时空耦合性。值得注意的是，该区域的岩石圈减薄程度呈现明显的空间分异特征，表现为自西向东逐渐加剧的变化趋势。关于华南岩石圈减薄机制尚存诸多争议，所涉及理论包括拆沉作用、古太平洋板块俯冲作用以及地幔柱构造等。因此，加强对研究岩石圈板块演化的时间、机制具有重要意义。基于前人研究成果，文章系统综述了华南地区中生代岩石圈减薄的时代背景、动力学机制的研究现状。
The eastern China region underwent significant lithospheric thinning during the late Mesozoic, a geological event that exhibits clear spatiotemporal correlation with the widespread and intense magmatic activity in the area. Notably, the degree of lithospheric thinning in this region displays distinct spatial heterogeneity, characterized by an eastward-increasing trend. The mechanisms behind lithospheric thinning in South China remain highly debated, with proposed theories including delamination, subduction of the Paleo-Pacific Plate, and mantle plume tectonics. Therefore, it is of great significance to further investigate the timing and mechanisms of lithospheric plate evolution. Based on previous research, this paper systematically reviews the temporal framework and current understanding of the dynamic mechanisms of Mesozoic lithospheric thinning in South China.
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