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引用本文:王明健,张勇,潘军,黄龙,陈晓红,骆迪,侯方辉,尚鲁宁. 东部海域地学大断面地质结构特征及其对综合地层分区的约束[J]. 中国地质, 2020, 47(5): 1474-1485.
WANG Mingjian,ZHANG Yong,PAN Jun,HUANG Long,CHEN Xiaohong,LUO Di,HOU Fanghui,SHANG Luning. Geological structure of the large section in eastern China’ s sea areas and its constraint on comprehensive stratigraphic division[J]. Geology in China, 2020, 47(5): 1474-1485(in Chinese with English abstract).
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东部海域地学大断面地质结构特征及其对综合地层分区的约束
王明健1,2, 张勇1,2, 潘军1, 黄龙1, 陈晓红3, 骆迪1, 侯方辉1, 尚鲁宁1
1.青岛海洋地质研究所, 山东 青岛 266071;2.海洋国家实验室海洋矿产资源评价与探测技术功能实验室, 山东 青岛 266071;3.中国石油大学 (华东), 山东 青岛 266580
摘要:
本文利用实测的地质地球物理资料,在中国东部海域开展了地学大断面重磁震联合反演,系统研究了各构造单元的基底性质和地层结构,并以此为约束开展了海陆综合地层分区。研究认为,东海陆架盆地基底为元古宇和古生界,盖层发育5套构造层;南黄海盆地具有双重基底,盖层可以划分为8个构造层。东海陆架盆地以晚中生代燕山期以来的变形为主;南黄海盆地海相下构造层主要表现为挤压变形,陆相中构造层主要发育拉张作用形成各种构造样式。区内莫霍面深度稳定,一般在30 km左右,仅在勿南沙—中部隆起处上地幔略有抬高,总体上南部东海陆架盆地区莫霍面埋深要大于北部南黄海盆地—苏鲁造山带。将中国东部海域划分为2个地层大区,6个地层区和14个地层分区。大断面地层结构研究揭示,在南黄海海域和东海海域广泛发育中、古生代地层,巨厚的中—古生界为油气资源的形成与赋存提供了丰富的物质基础。
关键词:  地震剖面|地球物理|构造特征|联合反演|油气资源效应|中国东部海区
DOI:10.12029/gc20200513
分类号:TE122.1
基金项目:中国地质调查局地质调查项目(DD20160137,DD20190205,DD20190208)及国家自然科学基金(41606079)联合资助。
Geological structure of the large section in eastern China’ s sea areas and its constraint on comprehensive stratigraphic division
WANG Mingjian1,2, ZHANG Yong1,2, PAN Jun1, HUANG Long1, CHEN Xiaohong3, LUO Di1, HOU Fanghui1, SHANG Luning1
1.Qingdao Institute of Marine Geology, CGS, Qingdao 266071, Shandong, China;2.Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, Shandong, China;3.China University of Petroleum, Qingdao 266580, Shandong, China
Abstract:
Based on the geophysical and geophysical data collected in recent years, the authors carried out the joint gravitymagnetic-seismic inversion in eastern China's sea areas and studied the characteristics of the basement and geological structure of regionalization and predicted the favorable oil-bearing prospective areas of Mesozoic. The basement of the East China Sea shelf basin is composed of Proterozoic and Paleozoic strata, and 5 sets of tectonic layers are developed in the caprock. The south Yellow Sea basin having dual basement and caprock feature can be divided into 8 tectonic layers. The East China Sea shelf basin is dominated by the late Mesozoic Yanshanian transformation. The lower tectonic layer of the Yellow Sea basin is mainly characterized by extrusion deformation while the middle tectonic layer is mainly characterized by multiple structural styles formed by extension. The depth of the Moho surface is stable in the study area, which is usually about 30 km. The upper mantle is slightly elevated in the Wunansha-middle uplift. The Moho depth in the East China Sea shelf basin is generally deeper than that in the South Yellow Sea Basin—Sulu orogenic belt. Eastern China's sea areas and their adjacent areas can be divided into 2 first level stratigraphic regions (Eurasian), 6 second level stratigraphic regions and 14 third level stratigraphic regions. The study of large cross-section stratigraphic structure reveals that the Mesozoic and Paleozoic strata are widely developed in south Yellow Sea and the East China Sea. The thick Meso-Paleozoic strata provide a rich material basis for oil and gas formation and accumulation.
Key words:  seismic section|geophysics|tectonic characteristics|joint inversion|oil and gas resources|eastern China's sea areas