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| 天山北缘晚新生代快速变形时间的确定及其成藏意义 | |
| 引用本文： | 方世虎,宋岩,贾承造,郭召杰,张志诚,刘楼军.天山北缘晚新生代快速变形时间的确定及其成藏意义[J].地学前缘,2007,14(2):205-214. |
| 作者姓名： | 方世虎 宋岩 贾承造 郭召杰 张志诚 刘楼军 |
| 作者单位： | 1. 中国石油勘探开发研究院,北京,100083 2. 北京大学,地球与空间科学学院,北京,100871 3. 中国石油,新疆油田公司,新疆,乌鲁木齐,834000 |
| 基金项目： | 中国石油集团石油科技中青年创新基金 , 中国博士后科学基金 , 国家科技攻关项目 |
| 摘 要： | 生长地层分析及区域研究成果表明天山北缘冲断带晚新生代快速变形主要形成于10～7Ma以来。10Ma以来准南前陆冲断带持续扩展,形成现今地表可见的三排褶皱冲断带,其构造形成时间明显晚于天山南缘,显示印-藏碰撞引起的区域构造变形由南向北传播的特征。10Ma以来的变形强度显示天山北缘乌鲁木齐以西—齐古背斜地区的构造变形相对较弱,向两侧剥蚀作用、构造变形有所增强。晚新生代快速变形与晚期成藏匹配良好,决定冲断带前缘是油气成藏的有利部位,而山前构造带的剥蚀、隆升强烈,构造变形较弱的构造(带)应是早期成藏得以保存的有利部位。 |
| 关 键 词： | 天山北缘 冲断带 晚新生代 变形时间 变形特征 油气成藏 |
| 文章编号： | 1005-2321(2007)02-0205-10 |
| 修稿时间： | 2006年9月18日 |
Timing of Cenozoic intense deformation at the north margin of Tianshan and its implications for petroleum accumulation |
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| Fang Shihu,Song Yan,Jia Chengzao,Guo Zhaojie,Zhang Zhicheng,Liu Loujun.Timing of Cenozoic intense deformation at the north margin of Tianshan and its implications for petroleum accumulation[J].Earth Science Frontiers,2007,14(2):205-214. | |
| Authors: | Fang Shihu Song Yan Jia Chengzao Guo Zhaojie Zhang Zhicheng Liu Loujun |
| Abstract: | Regional studies indicate that intense Cenozoic tectonism along the north margin of the Tianshan began between 10 Ma and 7 Ma BP. This tectonism was associated with intense deformation, leading to the formation of three thrust belts on the northern margin of the Tianshan. The timing of this intense deformation is much younger than that on the southern Tianshan, suggesting that tectonic deformation propagated from south to north, due to the India-Asia collision. The Late Cenozoic deformation resulted in the relatively gentle deformation at the western rümqi-Qigu anticline. This differential tectonic deformation indicates that the front of a thrust belt is advantageous for the accumulation of hydrocarbons. Moreover, structure with relatively gentle denudation and uplifting along the fold belt is also advantageous for the preservation of oil and gas that accumulated during the early deformation phase. |
| Keywords: | north margin of Tianshan thrust belt Late Cenozoic intense deformation hydrocarbon accumulation |
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