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东海陆架盆地南部生长断层活动特征
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  • 英文篇名:Research on characteristics of growth faults in the southern East China Sea Shelf Basin
  • 作者:冉伟民 ; 栾锡武 ; 邵珠福 ; 刘鸿 ; 李德勇 ; 赵洋 ; 王慧东 ; 颜中辉
  • 英文作者:RAN Weimin;LUAN Xiwu;SHAO Zhufu;LIU Hong;LI Deyong;ZHAO Yang;WANG Huidong;YAN Zhonghui;College of Marine Geosciences,Ocean University of China;Evaluation and Detection Technology Laboratory of Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology;Qingdao Institute of Marine Geology;School of Earth Science,Northeast Petroleum University;China Petroleum Pipeline (Engineering) Co.,Ltd.Engineering;China University of Petroleum;
  • 关键词:生长断层 ; 演化特征 ; 生长指数 ; 断层落差 ; 东海陆架盆地南部
  • 英文关键词:growth fault;;evolution characteristics;;growth index;;fault throw;;Southern East China Sea Shelf Basin(ECSSB)
  • 中文刊名:海洋地质与第四纪地质
  • 英文刊名:Marine Geology & Quaternary Geology
  • 机构:中国海洋大学海洋地球科学学院;海洋矿产资源评价与探测技术功能实验室;自然资源部青岛海洋地质研究所;东北石油大学地球科学学院;中国石油天然气管道局;中国石油大学(华东);
  • 出版日期:2019-02-28
  • 出版单位:海洋地质与第四纪地质
  • 年:2019
  • 期:01
  • 基金:国土资源部公益性行业科研专项“海底冷泉拖曳式快速成像系统”(201511037);; 青岛海洋科学与技术国家实验室基金项目“印尼爪哇盆地新生代构造变形及古地理演化”(QNLM201708);“多分量地震波逆时偏移拉伸校正及其并行实现”(QNLM2016ORP0206);; 鳌山科技创新计划项目“深海专项(预研)”(2017ASKJ01,2017ASKJ02);; 山东省自然科学基金博士基金“地质约束下的重磁三维反演在南黄海盆地崂山隆起的应用”(ZR2016DB33);; 中国博士后科学基金“基于保幅波场分离的多分量地震波逆时偏移方法研究”(2017M612219)
  • 语种:中文;
  • 页:103-115
  • 页数:13
  • CN:37-1117/P
  • ISSN:0256-1492
  • 分类号:P736.1
摘要
生长断层是在伸展和走滑盆地中一种重要且广泛存在的构造样式。通过地震资料定性识别出东海陆架盆地南部地区18条生长断层;根据断裂对研究区各级构造单元控制作用和纵向切穿地层情况,将其划分为一级控盆断裂、二级控凹断裂、三级控带断裂和盖层断裂;通过断裂平面分布特征研究认为研究区的断裂以NE、NNE延伸为主,少数为NEE方向;利用地震剖面在研究区识别出阶梯状组合断层带、"Y"字型组合断层、多米诺式断层带、地堑、地垒等多种断裂组合样式;又结合生长指数和断层落差两种方法对研究区生长断层的运动学特征进行了定量统计分析,发现研究区生长断层在古近纪时期活动强度具有自西向东逐渐递减趋势,区内断层活动期次自西向东逐渐变新,整个研究区内生长断层在古近纪盆地裂陷—断陷期活动强度最大,中新世后断裂活动趋于稳定。认为晚中生代以来太平洋板块西缘俯冲后撤和印度板块向亚欧板块俯冲碰撞在东海陆架盆地形成的远程蠕散效应,使东海陆架盆地形成了拉张伸展应力场环境,是研究区发育大量生长断层的首要原因。同时,加强对研究区生长断层伴生构造如滚动背斜和缓坡带阶梯状断裂组合封堵形成的岩性圈闭研究,有利于推动东海陆架中新生代盆地资源勘探可持续发展。
        The growth fault is an important and widely distributed structure in extensional and strike-slip basins.18 growth faults have been identified by the authors with seismic data in the south East China Sea Shelf Basin(ECSSB).According to their roles in controlling tectonic units development and the vertical sequence they cut through,the faults may be divided into several orders,i.e.the 1 st order basin-controlling faults,the 2 nd order concave controlling faults,the 3 rd order band controlling faults and cap faults.As to the distribution pattern,the majority of the growth faults of the study area are distributedin NE and NNE directions with a few in NEE direction.Various types of faults combinations are identified in seismic profiles,such as the steplike faults,the "Y"type faults,the domino-type faults,and the combination of graben and horst faults.According to the kinematics characteristics of faults such as growth index and fault throw,it is found that the growth faulting movement of Paleogene was in a decreasing trend from west to east,and thus the faults became younger to the east.The intensity of growth faulting in the whole study area reached a peak in Paleocene and became stable after Miocene,resulted from the joint effects of the extension dynamics background,that is the retrogradation of the subduction slab of the west Pacific margin and the eastern vermiculation of the ECSSB due to the subduction and collision between the India plate and Eurasian plate.Further study on growth fault and associated structures as well as the steplike fault zone in gentle slope belts is suggested to push forward the explorationin ECSSB basins.
引文
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