缅甸含油气盆地群形成演化及其地球动力学背景

王营; 辛仁臣

doi:10.19509/j.cnki.dzkq.2021.0009

缅甸含油气盆地群形成演化及其地球动力学背景

doi: 10.19509/j.cnki.dzkq.2021.0009

王营,
辛仁臣^,

基金项目:

国家科技重大专项"全球重点领域油气地质与富集规律研究" 2016ZX05029-001-002

详细信息

作者简介:
王营(1995—), 女, 现正攻读海洋科学专业硕士学位, 主要从事沉积学、层序地层学方面的研究工作。E-mail:wangying4164@163.com

通讯作者:
辛仁臣(1964—), 男, 副教授, 主要从事沉积学、层序地层学和油气地质学方面的研究工作。E-mail:xinrenchen@163.com

中图分类号: P541
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出版历程
- 收稿日期: 2020-01-08

Evolution and geodynamic background of Myanmar petroliferous basin group

Wang Ying,
Xin Renchen^,

摘要

摘要: 基于不同构造单元地质记录的分析，结合板块重建及地球动力学背景，对缅甸含油气盆地群的形成演化及其地球动力学背景进行了探讨。研究表明：缅甸含油气盆地群的基底是晚基梅里期变质杂岩；晚白垩世至始新世，新特提斯洋壳向西缅地块之下NNE向斜向俯冲，在西缅地块西缘发育增生楔，而在西缅地块内形成了火山弧、弧前裂陷盆地和弧后裂陷盆地；渐新世以来，新特提斯关闭，随后印度地块与西缅地块北段陆陆碰撞，西缅地块北部的盆地演化为弧后前陆盆地；印度洋壳向西缅地块中段和南段之下NEE向俯冲，西缅地块西缘先期增生楔逐步隆升为印缅山脉，印缅山脉东侧的西缅地块中南部盆地均演化为弧后挤压盆地，印缅山脉西侧的若开盆地成为弧前盆地。
- 缅甸盆地群 /
- 弧前盆地 /
- 弧后盆地 /
- 盆地演化 /
- 新特提斯
Abstract: Based on the analysis of the geological records of different tectonic units, and combined with plate reconstruction and geodynamic background, the evolution and their geodynamic background of Myanmar petroliferous basin group are discussed in this paper.The study shows that the basement of Myanmar petroliferous basin group is a metamorphic complex developed in the Late Cimmerian period.From Late Cretaceous to Eocene, the Neo-Tethys oceanic crust subducted towards the NNE under the West Burma block.Accretionary wedge developed on the western edge of the West Burma block, and volcanic arcs, fore-arc rift basins, and back-arc rift basins formed in the West Burma block.Since Oligocene, the Neo-Tethys closed down, and then the Indian block and the northern part of the West Burma block collided, and the basins in the northern part of the West Burma block evolved into back-arc foreland basins.The Indian Ocean crust subducted towards the NEE under the central and southern parts of West Burma block, and the accretionary wedge developed on the western edge of the West Burma block gradually uplifted to the Indo-Burma range.The central and southern basins of the West Burma block on the east side of the Indo-Burma range all evolved into back-arc compressional basins, while the Rakhine basin on the west side of the Indo-Burma range evolved into fore-arc basin.The results of this study have certain indicative significance for the prediction and exploration of oil-gas and mineral resources in the Myanmar basin group.
- Myanmar basin group /
- fore-arc basin /
- back-arc basin /
- basin evolution /
- Neo-Tethys

HTML全文

图 1 缅甸地区构造简图(据文献[1, 5]编绘)

Figure 1. Schematic structural diagram of Myanmar area

下载: 全尺寸图片幻灯片

图 2 印缅山脉-西缅地块及围区地质剖面简图(剖面位置见图 1，据文献[18]编绘)

Figure 2. Schematic diagram of geological section of Indo-Burma range-West Burma block and surrounding areas

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图 3 缅甸盆地群重点地区地层序列及对比(据文献[1, 7-9, 12, 19-23, 29-33]编绘)

Figure 3. Stratigraphic sequence and comparison of the key areas of the Myanmar basin group

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图 4 西缅地块中北部(23°N附近)地震资料地质解释剖面(剖面位置见图 1，据文献[30]编绘)

A.地震剖面；B.地质解释剖面

Figure 4. Geological section interpreted from seismic data of the central-north part of the West Burma block (near 23°N)

下载: 全尺寸图片幻灯片

图 5 东特提斯古地理再造(据文献[35-44]编绘)

Figure 5. Palaeogeographic reconstructions for eastern Tethys

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图 6 缅甸盆地群演化剖面(剖面位置见图 1，5)

Figure 6. Geological section of evolution of the Myanmar basin group

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