第27卷第5期 2013年10月
现代地质 GEOSCIENCE
Vol.27No.5
Oct.2013
塔里木盆地巴楚隆起卡拉沙依断裂带活动特征
吕明1,2，汤良杰,2
（1.中国石油大学（北京）油气资源与探测国家重点实验室，北京102249；2.中国石油大学（北京）盆地与油藏研究中心，北京102249）摘要：通过系统的地震资料综合解释，对塔里木盆地巴楚隆起卡拉沙依断裂上、下盘沉积地层厚度的变化及各界面与上、下部地层的接触关系、不整合面的发育特征及变化规律进行研究，以此来探讨卡拉沙依断裂各时期的活动特征。认为卡拉沙依断裂东、西两段呈现出截然不同的活动特征。主断裂东段，晚寒武世一奥陶纪，断裂无明显活动；早志留世晚期一早二叠世，断裂开始活动，呈现出逆冲推覆断裂的特征；经中二叠世的平静期，从晚二叠世开始文有一次逆冲推覆活动。而位于主断裂南侧的次级断裂，在晚寒武纪一中志留世，断裂无明显活动；从早中泥盆世开始，次级断裂开始活动，表现为压性断裂特征，逆冲推覆作用持续至早二叠世，经过中二叠世短暂的平静期，在晚二叠世还有一次继承性活动，但活动强度较弱。主断裂西段，奥陶纪时期，断裂开始活动并表现出张性断裂活动特征；经过志留纪一中二叠世的平静期，从晚二叠世开始，断裂西段发生正反转作用，逆冲推覆活动明显。次级断裂西段，在晚寒武
世一早中二叠世并无活动，从晚二叠世开始，断裂开始活动，表现为强烈的逆冲推覆作用。关键词：卡拉沙依断裂；削截；正反转构造；活动期次
中图分类号：TE121.2
文献标志码：A
文章编号：10008527(2013)05-101310
Characteristics of Kalashayi Fault Zone Activities in
Bachu Uplift, Tarim Basin LU Ming'-2, TANG Liang-jie'-2
(1. State Key Laboratory of Petroleum Resources and Prospecting, China Unizersity of Petroleum, Bejing102249, China;
2. Basin and Reserroir Research Center, China Unizersity of Petroleum, Bejing102249, China)
Abstract: Based on the interpretation of seismic data, the residual thickness of sediment strata, contact rela-tionship between overlying and underlying strata, interfaces in the hanging wall and footwall blocks, and development characteristics and variational rules of unconformity in Kalashayi fault in Bachu uplift of Tarim Ba-sin were researched, moreover the characteristics of activities of Kalashayi fault in different stages were investi-gated. The results show that the east section and the west section of Kalashayi fault have different activities. In the east section, the fault is inactive from Late Cambrian to Ordovician, and thrusting nappe fault occurs from the late stage of Early Silurian to Early Permian; in Middle Permian the fault is inactive and thrusts again in Late Permian. The subsidiary faults located in the south of main fault are inactive from Late Cambrian to Early-Middle Silurian, then strongly thrust since Early Devonian and continue to thrust until Early Permian; after a quiet period within Middle Permian, the faults are weakly active in Late Permian. In the west section, the fault is inactive since Late Cambrian; in Ordovician, the fault is active to be an extensional fault; from Silurian to Middle Permian, there occurs a quiet stage; in Late Permian, the fault has undergone a positive inversion move-ment. The subsidiary faults in the west section are inactive from Late Cambrian to Middle Permian and are strongly active to be thrusting nappe faults since Late Permian.
Key words: Kalashayi fault; truncation; positive inversion structure; active stage
收稿日期：2013-06-15；改回日期：2013-07-20；责任编辑：潘令枝。
基金项目：国家科技重大专项（2011ZX05002-003-001）；中石化西北油田分公司项目（KY2010-S-053）。作者简介：吕明，男，博士研究生，1983年出生，构造地质学专业，主要从事含油气盆地构造研究工作。
Email:Ivming0729@163.com。