地球物理学进展 ›› 2018, Vol. 33 ›› Issue (5): 2166-2171.doi: 10.6038/pg2018BB0372

• 应用地球物理学Ⅱ(海洋、工程、环境、仪器等) • 上一篇    下一篇

海阳凹陷东、西边界以及胶莱盆地东部边界讨论

孙中宇1(),刘展1,*(),杨博1,张旺2,张勇3,孟祥君3   

  1. 1. 中国石油大学(华东)地球科学与技术学院,山东青岛 266555
    2. 国家海洋局北海海洋工程勘察研究院, 山东青岛 266033
    3. 青岛海洋地质研究所, 山东青岛 266071
  • 收稿日期:2017-12-09 修回日期:2018-07-16 出版日期:2018-10-20 发布日期:2019-01-11
  • 通讯作者: 刘展 E-mail:sunzhy2016@163.com;liuzhan5791@sina.com
  • 作者简介:孙中宇,男,1993年生,硕士,主要从事海洋重磁勘探研究工作.
  • 基金资助:
    国家高技术研究发展计划(863计划)项目(2012AA09A20107)

Discussion on the eastern and western boundary of Haiyang depression and eastern boundary of Jiaolai Basin

SUN Zhong-yu1(),LIU Zhan1,*(),YANG Bo1,ZHANG Wang2,ZHANG Yong3,MENG Xiang-jun3   

  1. 1. School of Geosciences, China University of Petroleum (Hua Dong), Shandong Qingdao 266555, China
    2. State Oceanic Administration Beihai Marine Engineering Investigation Institute, Shandong Qingdao 266033, China
    3. Qingdao Institute of Marine Geology, Shandong Qingdao 266071, China;
  • Received:2017-12-09 Revised:2018-07-16 Online:2018-10-20 Published:2019-01-11
  • Contact: Zhan LIU E-mail:sunzhy2016@163.com;liuzhan5791@sina.com

摘要:

胶莱盆地位于山东半岛中部,郯庐断裂带东部,处于中国东部构造关键位置上.多年来,由于胶莱盆地一部分在海里,缺乏精度较高的物探资料,所以地质、地球物理学家对胶莱盆地的形成机制,边界断裂存在不同的认识.本文利用最新海陆高精度重磁资料,和成熟的重磁数据处理方法,并结合前人大量的地质和地球物理资料,基于断裂划分、重磁联合解释以及密度界面和磁性界面的反演结果进行构造区划,并结合基底特征、断裂特征、地层特征综合地质和地球物理知识重点讨论了海阳凹陷的东西边界,发现海阳凹陷与千里岩隆起的上述特征相差很大,海阳凹陷与胶莱盆地虽然有牟即断裂带相隔,但是仍然有很多相近之处,基于此重新划定了海阳凹陷的东部边界为千里岩北缘断裂,并划定胶莱盆地的东部边界为千里岩北缘断裂.为下一步的构造区划和该地区海洋地质研究奠定了基础.

关键词: 重磁联合解释, 胶莱盆地, 海阳凹陷, 边界断裂, 地层埋深

Abstract:

Jiaolai Basin is located in the central part of Shandong Peninsula, east of the Tan-Lu fault zone and is located in the key tectonic setting in eastern China. Over the years, due to the lack of accurate geophysical data in part of the Jiaolai Basin, geological and geophysicists have different understandings on the formation mechanism and boundary faults of the Jiaolai Basin. In this paper, based on the latest sea-land high-precision gravity and magnetic data and mature gravity and magnetic data processing methods, combined with a large number of geological and geophysical data, based on fracture classification, gravity and magnetic interpretation and inversion results of density and magnetic interfaces tectonic zoning and combining the features of basement, fault, stratigraphic features with geology and geophysics, focusing on the east-west boundary of Haiyang depression, we find that there is a great difference between Haiyang depression and Qianliyan uplift, However, there are still many similarities. Such as the depth of the basement, the depth of the layers and the missing of the layers are similar to each other.Based on this, the eastern boundary of Haiyang depression was delimited by the northern margin of the Qianliyan rock and the east boundary of the Jiaolai Basin was delineated as the fracture of the northern margin of the Qianliyan. It laid the foundation for the next tectonic regionalization and the marine geological research in the area.

Key words: jointing gravity and magnetic data, Jiaolai Basin, Haiyang depression, boundary fault, stratigraphic depth

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