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Characteristics of airborne gravity field and the main geological discovery in the northern South Yellow Sea |
ZHANG Xuanjie, ZHANG Wan, FAN Ziliang, ZHU Weiping, TONG Jing, YAO Guotao |
China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083, China |
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Abstract The obvious anomalies of gravity field in the northern South Yellow Sea distribute in a gradient belt form, which reflects the main geological characteristics of structural framework with uplifts, depressions and faults in this area. The main structural framework of South Yellow Sea consists of NE-trending faults, and Jiashan-Xiangshui fault belt and north margin of South Yellow Sea fault belt formed the south boundary of Su-Lu orogenic belt together. The aeromagnetic and gravity data indicate that the Gongjiadao NW-trending deep fault, a new discovery, controls basement formation and magmatic rocks distribution in the northern South Yellow Sea. The Precambrian crystalline basement exists in northeast sag of northern depression in the South Yellow Sea from inversion and interpretation of magnetic and gravity data. The aero gravity data indicate that Jiaolai basin extends eastward into South Yellow Sea with maximum thickness of deposition up to 3 km. These new recognition and discovery can provide some solutions for further investigation of marine regional geology, oil-gas investigation, and other fundamental geological problems in the northern South Yellow Sea.
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Received: 03 January 2017
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[1] 熊盛青.我国航空重磁勘探技术现状与发展趋势[J].地球物理学进展,2009,24(1):113-117. [2] 张玄杰,陈斌,朱卫平,等.大连周边海域航空重力调查方法及重要成果[J].中国地质调查,2016,3(2):40-45. [3] 林晓星,陈斌,张玄杰,等.天津周边海-陆过渡地区航空重力调查及主要成果[J].中国地质调查,2016,3(6):57-62. [4] 张婉,王志博,刘英会,等.航空重磁综合测量在准噶尔油气资源调查中的应用[J].中国地质调查,2016,3(6):10-16. [5] 杨文采.中央造山带东段岩石圈的构造格架[J].中国地质,2005,32(2):299-309. [6] 陈建文,龚建明,李刚,等.南黄海盆地海相中—古生界油气资源潜力巨大[J].海洋地质前沿,2016,32(1):1-7. [7] 姚永坚,夏斌,冯志强,等.南黄海古生代以来构造演化[J].石油实验地质,2005,27(2):124-128. [8] 高顺莉,周祖翼.南黄海盆地东北凹侏罗纪地层的发现及其分布特征[J].高校地质学报,2014,20(增刊):286-293. |
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