期刊文献+

准噶尔盆地西北缘构造演化与扇体形成和分布 预览 被引量:124

Tectonic evolution and development and distribution of fans on northwestern edge of Junggar Basin
在线阅读 下载PDF
收藏 分享 导出
摘要 准噶尔盆地西北缘经历了多次(期)不同性质的构造演化.在新生代以后,表现出(类)前陆盆地性质,伴随区域构造运动发生强烈的碰撞挤压、冲断作用.断裂活动具有明显的推覆性质,产生了与断裂带平行的褶皱构造.西北缘逆掩断裂普遍具有同生活动性质,对扇体的形成有明显的控制作用.主要表现为冲断作用持续发生,上、下盘地形相差悬殊,自冲断席上剥蚀下来的碎屑物堆积于断崖根部而形成各类扇体(冲积扇、扇三角洲和水下扇等),阶梯式逆冲断裂则形成多级扇体.研究表明,从二叠纪到侏罗纪构造活动逐渐减弱,扇体规模逐渐变小; 在平面上由于构造活动的位移,导致了扇体的迁移.总体来看,百口泉 - 夏子街地区活动性最强,延续时间最长,形成的扇体规模较大、叠置程度高、迁移明显; 车拐 - 克拉玛依地区活动性较弱,形成的扇体规模小、叠置程度差、迁移小. The northwestern edge of Junggar Basin experienced multiphase tectonic movements of different natures, and it appeared as a foreland basin since Cenozoic. Extensive collision, compression and thrusting occurred along with regional tectonic movement, and faulting apparently had the nature of overthrusting, resulting in fold structures to be in parallel with the fracture zone. The overthrust faults were commonly syngenetic and controlled obviously the development of fans. Thrusting occurred continuously, so topographies on the hanging walls were greatly different from those on the footwalls. Clastics denuded from the thrust sheets accumulated on the foot of fault scarps, leading to the formation of various fans (alluvial fan, fan delta and submarine fan, etc.). Step thrust faults led to the formation of multistage fans. Tectonic activities attenuated gradually from Permian to Jurassic and the sizes of fans decreased gradually. Lateral displacement of tectonic activities resulted in the migration of fans. As a whole, the strongest and longest tectonic activities occurred in Baikouquan-Xiazijie area, hence the fans in that area would be relatively large, highly superimposed and largely migrated; while those in Cheguai-Karamay area were relatively weak, so the fans would be small, poorly superimposed and shortly migrated.
作者 雷振宇 鲁兵 蔚远江 张立平 石昕 Lei Zhenyu,Lu Bing,Wei Yuanjiang,Zhang Liping, Shi Xin(1.Petroleum Exploration and Development Research Institute, PetroChina,Beijing; 2.Petroleum Exploration and Development Company, PetroChina, Beijing )
出处 《石油与天然气地质》 EI CAS CSCD 北大核心 2005年第1期 86-91,共6页 Oil & Gas Geology
基金 中国石油天然气集团公司资助项目
关键词 准噶尔西北缘 构造演化 断裂活动 扇体迁移 northwestern edge of Junggar Basin tectonic evolution faulting fan migration
  • 相关文献

参考文献12

二级参考文献21

共引文献143

同被引文献1537

引证文献124

二级引证文献797

投稿分析
职称考试

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈