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壳-幔细结构与地壳运动、构造变形、地震活动及其成因机制、岩浆活动、变质作用与成矿作用、地球的温度变化及演化等基本地学问题密切相关。本文以我国苏、浙、皖区和东海大陆架地壳细结构研究为例,结合国内外深部地质资料,探讨了异常地幔的三种可能成因;指出了苏南-东海大陆架有滑脱构造的某些地壳细结构特征;认为Moho面之下的M_0面可作为Air?模式的均衡补偿面。最后,文中给出了苏、浙、皖区均衡模式。
The crust-mantle fine structure is closely related to crustal movement, tectonic deformation, seismic activity and its genetic mechanism, magmatic activities, metamorphism and mineralization, temperature change and evolution of the earth. Taking the deep crustal structure of the continental shelf in Jiangsu, Zhejiang, Anhui and the East China Sea as an example, this paper discusses three possible causes of anomalous mantle in combination with deep geological data at home and abroad. It also points out that some crustal structures of the southern Jiangsu-East China Sea shelf have slippage structures Fine structure feature; it is considered that the M_0 plane under the Moho plane can be used as an equilibrium compensation plane for Air mode. Finally, the article gives the equilibrium model of Jiangsu, Zhejiang and Anhui provinces.