东海陆架盆地中生界残留分布特征及其大地构造意义

发布时间：2018-05-04 00:24

本文选题：东海陆架盆地 + 中生界　；参考：《中国海洋大学学报(自然科学版)》2017年11期

【摘要】：东海陆架盆地位于西太平洋活动大陆边缘,为一典型的中、新生界叠合盆地,盆内新生界地质成果丰硕,但中生界相关研究程度较低。本文基于近10年来的中生界研究工作,并综合前人研究成果,对盆内中生界发育特征、残留展布特点等进行了系统性总结与描述。盆内中生界广泛分布、南北差异,北部分布较为分散且厚度略薄,以白垩系为主,一般厚约1 000~2 500m。南部则分布连续且广泛,厚度较大,白垩系、侏罗系皆发育较好,一般厚约4 500~6 000m,最大厚度可达7 500m,雁荡低凸起、台北低凸起及观音凸起等构造单元上皆发育有一定厚度的中生代地层,进而较大程度改变了对于东海陆架盆地构造格局的传统认识。在此基础上,进一步探讨了中生代盆地构造格局,系统讨论了中生界展布所反映的大地构造背景与东亚陆缘转换问题。这些研究不仅对盆地中生界油气勘探中的区带优选具有重要参考价值,而且对于深入研究东海陆架盆地中生代构造演化、动力学机制等具有重要的借鉴意义。
[Abstract]:The East China Sea shelf basin is located on the active continental margin of the western Pacific Ocean and is a typical Mesozoic and Cenozoic superimposed basin. Based on the research work of Mesozoic in recent 10 years and the previous research results, the characteristics of Mesozoic development and residual distribution in the basin are systematically summarized and described in this paper. The Mesozoic is widely distributed in the basin, with the difference between the north and the south, and the distribution in the north is scattered and slightly thin, mainly in the Cretaceous system, generally about 1 000 ~ 2 500 m thick. In the south, the distribution is continuous, wide and thick, and the Cretaceous and Jurassic are well developed, the thickness is about 4 500 ~ 6 000 m, the maximum thickness is 7 500 m, and the Yandang is low bulge. Mesozoic strata have been developed on the low uplift and Guanyin uplift in Taipei, which has changed the traditional understanding of the tectonic framework of the East China Sea shelf basin to a great extent. On this basis, the tectonic framework of Mesozoic basin is further discussed, and the tectonic background and the transformation of East Asian continental margin reflected by Mesozoic spreading are systematically discussed. These studies not only have important reference value for the optimal selection of zones in Mesozoic oil and gas exploration of the basin, but also have important reference significance for studying the Mesozoic tectonic evolution and dynamic mechanism of the East China Sea shelf basin.
【作者单位】：中国地质调查局青岛海洋地质研究所;国土资源部海洋油气资源和环境地质重点实验室;
【基金】：国家自然科学基金项目(41506080,41476053,41606050) 中国地质调查局项目(DD20160153-01)资助~~
【分类号】：P618.13;P736.1

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