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| 莺-琼盆地基底控制断裂样式的模拟探讨 | |
| 引用本文： | 孙珍,周蒂,钟志洪,丘学林,曾佐勋.莺-琼盆地基底控制断裂样式的模拟探讨[J].热带海洋学报,2005,24(2):70-78. |
| 作者姓名： | 孙珍 周蒂 钟志洪 丘学林 曾佐勋 |
| 作者单位： | 1. 中国科学院南海海洋研究所与广州地球化学研究所边缘海地质重点实验室,广东,广州,510301;中国海洋石油有限公司深圳分公司,广东,深圳,518067 2. 中国科学院南海海洋研究所与广州地球化学研究所边缘海地质重点实验室,广东,广州,510301 3. 中国海洋石油有限公司深圳分公司,广东,深圳,518067 4. 中国地质大学地学院,湖北,武汉,430074 |
| 基金项目： | 国家重点基础研究发展规划项目(G20000467 02)，中国科学院知识创新工程项目(KZCX2 SW 117 05)，国家自然科学基金重点项目(40238060)，中国科学院南海海洋研究所领域前沿项目，“九五”国家科技专项(2001DIA50041) |
| 摘 要： | 莺歌海盆地与琼东南盆地(即莺一琼盆地)是南海西北部2个重要的含油气盆地。莺歌海盆地走向NW，发育在红河断裂带上；琼东南盆地走向NE，与莺歌海盆地近直角相交。根据物理模拟实验，认为莺歌海盆地的演化受到了NW与近S-N向基底断裂的控制，在印支地块顺时针挤出应力场下发育和演化；而琼东南盆地则受到NE向基底断裂的控制，在SSE向伸展应力场控制下发育，NW与NE向构造带相互影响，造成了琼东南盆地北侧边界断裂走向近E—W，向南呈台阶式下掉，南侧边界断裂走向NE，莺琼过渡区隆凹格局复杂。由于莺歌海盆地NW向构造活动早于琼东南盆地NE向裂陷作用，从而导致NW向构造控制地位的形成，NW向断裂和构造表现为对NE向断裂和构造的阻截。 |
| 关 键 词： | 莺-琼盆地 构造演化 基底控制断裂 走滑伸展 物理模拟 |
| 文章编号： | 1009-5470(2005)02-0070-09 |
| 修稿时间： | 2004年6月7日 |
A STUDY ON BASAL CONTROLLING FAULT PATTERN OF YING-QIONG BASIN THROUGH ANALOGUE MODELING |
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| SUN Zhen,ZHOU Di,ZHONG Zhi-hong,QIU Xue-lin,ZENG Zuo-xun.A STUDY ON BASAL CONTROLLING FAULT PATTERN OF YING-QIONG BASIN THROUGH ANALOGUE MODELING[J].Journal of Tropical Oceanography,2005,24(2):70-78. | |
| Authors: | SUN Zhen ZHOU Di ZHONG Zhi-hong QIU Xue-lin ZENG Zuo-xun |
| Abstract: | The Yinggehai Basin and the Qiongdongnan Basin (abbreviated as Ying-Qiong Basin) are two important oil & gas bearing basins on the northwest shelf of the South China Sea. The Yinggehai Basin developed on the Red River Fault Zone and trends NW, while the Qiongdongnan Basin trends NE and is nearly perpendicular to the Yinggehai Basin. Based on analogue modeling experiments, we believe that the evolution of the Yinggehai Basin was controlled by initial NW and roughly N-S basal faults and developed under the stress field of the sinistral slip and clockwise rotation of the Indochina block. The Qiongdongnan Basin was controlled by NE-trending basal faults and developed under SSE extensional stress field. The NW- and NE-trending fault belts interacted to produce a complex triangle area, which is bounded by nearly E-W-trending faults in the north and NE-trending faults in the south. Most faults in the triangle area are E-W-trending and SE-dipping ones, which divided the triangle area into multiple uplifts and depressions. The initial rifting of the Yinggehai Basin was earlier than that of the Qiongdongnan Basin, so the NW-trending structures predominated and prohibited the NW propagation of the NE-trending faults and structures. |
| Keywords: | Ying-Qiong Basin tectonic evolution initial basal fault transtension analogue modeling |
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