莺歌海盆地深层拆离断层的发现及其形成机制

doi:10.3799/dqkx.2026.108

莺歌海盆地深层拆离断层的发现及其形成机制

doi: 10.3799/dqkx.2026.108

1. 中国地质大学, 湖北武汉, 430074;
2. 中国海油南海油气能源院士工作站, 海南海口, 570312;
3. 自然资源部第二海洋研究所, 浙江杭州, 310012

基金项目:

国家自然科学基金项目（42372133，U25B6026）、国家科技重大专项（2025ZD1402801）和中国海油南海油气能源院士工作站基金项目（NHYQNYJIJIN-001）.

详细信息

作者简介:
任建业（1963-），男，教授，博士，主要从事大陆边缘盆地动力学方面的教学和科研工作。E-mail:jyren@cug.edu.cn;ORCID:0000-0003-0780-651X

中图分类号: P736
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- 网络出版日期: 2026-05-13

Discovery and Formation Mechanism of the Deep Detachment Fault in the Yinggehai Basin

1. China University of Geosciences, Wuhan, 430074, China;
2. CNOOC South China Sea Oil & Gas Energy Academician Workstation, Haikou, Hainan 570312, China;
3. Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China

摘要

摘要: 莺歌海盆地传统上被界定为走滑或走滑伸展型盆地。本文基于宽线二维地震剖面解释，结合哀牢山-红河断裂带最新厘定的主走滑活动年龄与区域构造事件对比，重新识别出盆地充填序列中走滑作用的响应界面T62；提出一号断层实为形成于红河主走滑作用之前的大型拆离断层，该断层不仅控制T62界面之下规模巨大的宽而深的拆离盆地，其强烈的拆离作用还导致基底地壳显著薄化与地幔剥露。研究认为，盆地深层拆离作用受控于印度-亚洲碰撞引发的喜马拉雅构造结周边应力场快速调整；基于新的研究认识，本文构建了“断陷-拆离-走滑-拗陷”复合叠加的莺歌海盆地形成演化新模型，深化了莺歌海盆地成因机制的认识，对研究区油气与新能源勘探具有重要的指导意义。
- 莺歌海盆地 /
- 一号断层 /
- 拆离盆地 /
- 地幔剥露 /
- 走滑盆地
Abstract: Traditionally, the Yinggehai Basin has been defined as a strike-slip or strike-slip extensional basin. Based on the interpretation of wide-line 2D seismic profiles and comparison with the newly determined timing of major sinistral strike-slip activity along the Ailao Shan-Red River Fault Zone and regional tectonic events, this study re-identifies the response horizon T62, which records the effects of strike-slip motion within the basin’s filling sequence. It is proposed that Fault No. 1 is actually a large-scale detachment fault formed prior to the main sinistral activity of the Red River Fault. This fault not only controlled the development of a large and deep detachment basin below the T62 interface but also caused significant crustal thinning and mantle exhumation in the basin basement due to intense detachment. The study suggests that the deep detachment in the basin was controlled by rapid stress field adjustments around the Himalayan syntaxis triggered by the India-Asia collision. Based on these new insights, this paper establishes a novel composite evolutionary model of "rifting-detachment-strike-slip-subsidence" for the Yinggehai Basin. The research deepens the understanding of the basin formation mechanism and has important implications for hydrocarbon and new energy exploration in the study area.
- Yinggehai Basin /
- No. 1 Fault /
- Detachment Basin /
- Mantle Exhumation /
- Strike Slip Basin

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参考文献(61)

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莺歌海盆地深层拆离断层的发现及其形成机制

doi: 10.3799/dqkx.2026.108

作者简介:
任建业（1963-），男，教授，博士，主要从事大陆边缘盆地动力学方面的教学和科研工作。E-mail:jyren@cug.edu.cn;ORCID:0000-0003-0780-651X

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Discovery and Formation Mechanism of the Deep Detachment Fault in the Yinggehai Basin

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莺歌海盆地深层拆离断层的发现及其形成机制

doi: 10.3799/dqkx.2026.108

作者简介: 任建业（1963-），男，教授，博士，主要从事大陆边缘盆地动力学方面的教学和科研工作。E-mail:jyren@cug.edu.cn;ORCID:0000-0003-0780-651X

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出版历程

Discovery and Formation Mechanism of the Deep Detachment Fault in the Yinggehai Basin

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出版历程

目录

作者简介:
任建业（1963-），男，教授，博士，主要从事大陆边缘盆地动力学方面的教学和科研工作。E-mail:jyren@cug.edu.cn;ORCID:0000-0003-0780-651X