Title

Main characteristics and tectonic movement ages of fractures in Niaoshan region, west of Tarim Basin

作者

杨海军李曰俊吴根耀李勇曾昌民赵岩谭泽金

Authors

Yang Haijun Li Yuejun Wu Genyao Li Yong Zeng Changmin Zhao Yan Tan Zejin

单位

中国石油天然气股份有限公司塔里木油田分公司勘探开发研究院, 新疆, 库尔勒, 841000 2. 中国科学院, 地质与地球物理研究所, 北京, 100029

Organization

Research Institute of Petroleum Exploration & Development, Tarim Oilfield Branch Company, PetroChina, Korla, Xinjiang 841000, China 2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

摘要

基于一系列地震剖面解释,发现塔里木盆地西部东西向的鸟山深部断裂(及其北的罗斯塔格深部断裂)白垩纪发生向北的冲断,向下收敛于中—下寒武统膏盐层;鸟山浅部断裂更新世向北冲断,可延至全新世。鸟山东断裂主要在白垩纪发生右行剪切,与北西向的海米塔格深部断裂共同构成东西向冲断带中的变换构造带。鸟山北断裂中新世发生右行走滑,在北西向断裂的冲断活动中起了剪切变换作用。鸟山及邻区晚中生代以来的构造样式,可总结为2套不同方向的冲断系及与之配套的2套剪切变换系。据此认为该地区的油气前景不容乐观,并对断裂发育区的油气勘探提出了若干建议。

Abstract

The EW-trending Niaoshan deep fracture locates in the west of Tarim Basin.According to seismic section analyses,the Niaoshan deep fracture as well as the Luositage deep fracture to the north both thrusted to the north during Cretaceous,and extended downwards till the Lower-Middle Cambrian gypsum-salt layer.The Niaoshan shallow fracture thrusted northwards during Pleistocene,and continued to Holocene.The Niaoshan eastern fracture sheared right-laterally mainly in Cretaceous,forming transferring structural belt in EW-trending thrust belt together with the NW-trending Haimitage deep fracture.The Niaoshan northern fracture strike-slipped right-laterally during Miocene,playing the role of shearing transfer in the thrusting of NW-trending fracture.The tectonic styles in the Niaoshan and neighboring regions ever since the late Mesozoic were summarized into 2 sets of thrusting system with varied orientations,accompanied by 2 sets of shearing transfer.The Niaoshan region might not be a beneficial region for oil-and-gas exploration.Some suggestions for explorations in fracture well-developed regions were presented.

关键词：

鸟山断裂带; 鸟山北走滑断层; 鸟山东断裂带; 构造样式; 活动时代; 油气勘探; 塔里木西部;

Keywords:

Niaoshan fracture belt; Niaoshan northern strike-slipping fault; Niaoshan eastern fracture belt; structural style; tectonic movement ages; oil-and-gas exploration; western Tarim Basin;

基金项目

国家科技重大专项(2008ZX05008-063-001);国家自然科学基金(40972085);国家重点基础研究发展计划"973计划"项目(2006CB202301)共同资助

DOI

https://doi.org/10.11781/sysydz201102113

塔里木盆地西部鸟山地区断裂的主要特征和活动时代