珠江口盆地恩平凹陷珠琼运动二幕的构造—沉积响应及区域构造意义

doi:10.7623/syxb201104005

石油学报 ›› 2011, Vol. 32 ›› Issue (4): 588-595.DOI: 10.7623/syxb201104005

珠江口盆地恩平凹陷珠琼运动二幕的构造—沉积响应及区域构造意义

王家豪 1,2 刘丽华 3 陈胜红 3 尚亚乐 1

1中国地质大学资源学院湖北武汉 430074； 2中国地质大学构造与油气资源教育部重点实验室湖北武汉 430074； 3中海石油（中国）有限公司深圳分公司广东广州 510240

收稿日期:2010-11-27 修回日期:2011-03-18 出版日期:2011-07-25 发布日期:2011-09-22
通讯作者: 王家豪
作者简介:王家豪，男，1968年10月生，2005年获中国地质大学（武汉）博士学位，现为中国地质大学（武汉）副教授，主要从事沉积学、层序地层学方面的研究工作。
基金资助:
国家自然科学基金项目（No.40872077）资助。

Tectonic-sedimentary responses to the second episode of the Zhu-Qiong movement in the Enping Depression, Pearl River Mouth Basin and its regional tectonic significance

WANG Jiahao 1,2 LIU Lihua 3 CHEN Shenghong 3 SHANG Yale 1

Received:2010-11-27 Revised:2011-03-18 Online:2011-07-25 Published:2011-09-22

摘要/Abstract

摘要：

珠琼运动二幕是发生在珠江口盆地晚始新世—早渐新世的一次重大构造运动。通过对恩平凹陷的地震层序、沉积演化和断裂活动研究揭示，珠琼运动二幕的构造—沉积响应表现为文昌组与恩平组之间的区域性不整合面、盆地演化从断陷至断—拗阶段的变革、沉降中心迁移、新生EW走向断层和沉积体系整体转变等。结合中国东部渤海湾盆地黄骅坳陷的研究，珠琼运动二幕及同期构造作用不仅在珠江口盆地，而且在中国东部新生代盆地均可追索，对盆地构造演化、沉积充填以及油气生-储-盖组合均产生了重要影响，其共同特点是拗陷作用增强、区域应力场顺时针方向偏转并伴随右旋张扭作用，其形成与晚始新世以来印度板块与欧亚板块碰撞作用有关。

关键词: 珠江口盆地, 恩平凹陷, 古近纪, 珠琼运动, 层序地层

Abstract:

The second episode of the Zhu-Qiong movement is an important tectonic event that occurred from late Eocene to early Oligocene in the Pearl River Mouth Basin. Studies on seismic stratigraphic sequences, depositional evolution and fault activities of the Enping Depression have revealed that tectonic and sedimentary responses to the second episode of the Zhu-Qiong movement are characterized by a regional unconformity between the Enping Formation and the underlying Wenchang Formation, evolutional transform of the basin from rift to fault sag; migration of subsidence centers, generation of EW-orientated faults and the whole transform of depositional system. Furthermore, integrated with studies on the Huanghua Depression of the Bohai Bay Basin, eastern China, it has been proposed that the second episode of the Zhu-Qiong movement and its synchronous tectonism can be found not only in the Pearl River Mouth Basin but also in other Cenozoic basins of eastern China, they have affected tectonic evolution, deposition, and petroleum system of these basins greatly. These effects are commonly characterized by strengthening of downwarping and dextrorotatory deflection of regional stress fields with dextrorotatory tense-shearing action, and generally resulted from the collision of the Indian Plate with the Eurasian Plate since late Eocene.

Key words: Pearl River Mouth Basin, Enping Depression, Paleogene, Zhu-Qiong movement, stratigraphic sequence

王家豪刘丽华陈胜红尚亚乐. 珠江口盆地恩平凹陷珠琼运动二幕的构造—沉积响应及区域构造意义[J]. 石油学报, 2011, 32(4): 588-595.

WANG Jiahao LIU Lihua CHEN Shenghong SHANG Yale. Tectonic-sedimentary responses to the second episode of the Zhu-Qiong movement in the Enping Depression, Pearl River Mouth Basin and its regional tectonic significance[J]. Editorial office of ACTA PETROLEI SINICA, 2011, 32(4): 588-595.

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珠江口盆地恩平凹陷珠琼运动二幕的构造—沉积响应及区域构造意义

Tectonic-sedimentary responses to the second episode of the Zhu-Qiong movement in the Enping Depression, Pearl River Mouth Basin and its regional tectonic significance

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