安达曼海盆地德林达依陆架丹老断裂走滑特征与演化

金龙; 栾锡武; 肖菲; 姜露珊; 殷鉴; 王子杰; 王婕园; 杨晓; 马浩喆

doi:10.16028/j.1009-2722.2023.285

安达曼海盆地德林达依陆架丹老断裂走滑特征与演化

1.
山东科技大学地球科学与工程学院，青岛 266590

2.
中国地质调查局青岛海洋地质研究所，青岛 266237

基金项目: 国家自然科学基金（92055211，42249801）；中国-东盟海上合作基金项目（2120100500017001）

详细信息

作者简介: 金龙（1995—），男，硕士，助理工程师，主要从事海洋地球物理方面的研究工作. E-mail：jinlong_geology@163.com

通讯作者: 肖菲（1978—），女，高级工程师，主要从事海洋地质方面的研究工作. E-mail：xiaofei_hds@163.com

中图分类号: P736

收稿日期: 2023-12-16

刊出日期: 2024-12-28

Characterization and evolution of the Mergui Faults in the Tanintharyi Shelf, Andaman Sea Basin

1.
College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China

2.
Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266237, China

More Information

Corresponding author: XIAO Fei, xiaofei_hds@163.com

Received Date: 16 December 2023

Publish Date: 28 December 2024

摘要

摘要:
安达曼海盆地是由拉分作用形成的弧后扩张盆地。盆地东部的构造特征与演化对研究安达曼海盆地的演化和板块斜向俯冲作用形成的走滑断裂具有重要意义。本文以二维和三维地震数据为基础，结合钻井数据，对安达曼海盆地东部地层结构和构造特征进行分析，建立了安达曼海盆地东部地区的层序地层结构。通过地层解释和属性分析，识别了2个主要的断裂带，命名为东丹老断裂和西丹老断裂。根据构造分析，建立了断裂带的演化模式。研究结果表明，安达曼海盆地东部断裂带演化划分为3个阶段：早中新世走滑-强拉伸阶段、中—晚中新世扭张-走滑阶段和上新世至今的右旋走滑阶段。
- 安达曼海盆地 /
- 德林达依陆架 /
- 丹老断裂 /
- 走滑断层 /
- 地震解释 /
- 构造演化
Abstract:
Andaman Sea Basin is a back-arc spreading basin formed by pull-apart action, whose tectonic features and evolutionary mechanism in the eastern part of the basin are essential for understanding the evolution of the Andaman Sea Basin. The structural characteristics and evolution of the eastern part of the basin are of great significance for studying the evolution of the Andaman Sea Basin and the strike-slip faults formed by the oblique subduction of the plate. The stratigraphic structure and tectonic features in the eastern Andaman Sea Basin were analyzed based on 2D and 3D seismic data, and drilling and seismic profile data. The seismic stratigraphic sequences in the eastern Andaman Sea were established. Faults were finely sculpted using automatic 3D seismic layer pickup and seismic attributes. Two major fault zones were identified and named the East Mergui Fault and the West Mergui Fault. The evolution model of the fault zone was established based on the structural analysis. The evolution of the eastern Andaman fault zone could be divided into three phases: the strike-slip and strong extension stage in the Early Miocene, the extensional strike-slip stage in the Middle to Late Miocene, and the right-lateral strike-slip stage from the Pliocene to the present.
- Andaman Sea Basin /
- Tanitharyi Shelf /
- Mergui Faults /
- strike-slip faults /
- seismic interpretation /
- tectonic evolution

HTML全文

图 1 研究区位置及区域地质构造

Figure 1.

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图 2 研究区层序地层格架

Figure 2.

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图 3 二维地震测线、三维地震数据和关键的钻井及基底构造图示意图

Figure 3.

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图 4 地震剖面解释

Figure 4.

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图 5 丹老断裂三维透视图

Figure 5.

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图 6 丹老断裂地震剖面

Figure 6.

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图 7 地震剖面显示的东丹老断裂

Figure 7.

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图 8 地震剖面显示的西丹老断裂

Figure 8.

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图 9 地震剖面显示的西丹老断裂

Figure 9.

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图 10 安达曼东部丹老断裂的形成与演化过程

Figure 10.

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