孔雀河斜坡与库鲁克隆起构造-热演化史研究  

Research on basin-mountain tectonic-thermal history of Kongquehe Slope and Kuruketag Uplift

作　　者：任战利[1] 肖晖[1] 韩伟[1] 梁宇[1] 卿颖[1] 腾志宏[1] 史政[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,陕西西安710069

出　　处：《西北大学学报（自然科学版）》2009年第3期510-516,共7页Journal of Northwest University（Natural Science Edition）

基　　金：中石化股份有限公司重大基金资助项目(YPH08057);国家重点基础研究发展规划基金资助项目(2003CB214605)

摘　　要：目的探讨孔雀河斜坡与库鲁克塔格隆起盆山关系及其构造热演化历史。方法利用构造解析、镜质体反射率、磷灰石及锆石裂变径迹分析等方法,研究孔雀河斜坡与库鲁克塔格隆起盆山关系及其构造热演化历史。结果孔雀河斜坡区中新生代以来表现为平缓的斜坡,无明显的前陆拗陷。寒武—奥陶纪孔雀河地区及库鲁克塔格地区处于拉张环境,盆地原型为大陆裂谷盆地;志留—泥盆纪孔雀河地区为一种挤压环境,盆地类型为陆缘拗陷盆地;孔雀河地区侏罗纪呈现出陆内断陷盆地特征。库鲁克塔格隆起至少经历了两次隆升过程,分别是海西期和晚白垩世以来。结论孔雀河斜坡与库鲁克塔格隆起发育海西、燕山两期重要的构造运动,主构造变形期为早海西期,变形以褶皱及与之相伴的逆冲断裂为主要变形样式。盆山构造热演化史研究表明早海西期寒武系—下奥陶统烃源岩达到最大埋深和最高热演化程度,寒武系—下奥陶统烃源岩主生烃期为加里东晚期-早海西期。早海西期之后孔雀河斜坡寒武系—下奥陶统烃源岩不具有二次生烃条件。孔雀河斜坡油气勘探方向应以形成于海西期且后期保存好的圈闭为主。Aim To discuss the basin-mountain relation and tectonic-thermal evolution history of Kongquehe slope and Kuruketag uplift. Methods Of Structure analysis, vitrinite reflectance and fission track analysis of apatite and zircon is a useful way to research the basin-mountain relation and tectonic-thermal evolution history of Kongquehe slope and Kuruketag uplift. Results Kongquehe slope is gentle slope since Mesozoic era,which is no depression of foreland. Kongquehe slope and Kuruketag uplift is in extension, prototype basin is continental rift basin during Cambrian to Ordovician. Since Sinian to Devonian, it is in compressional surroundings, prototype basin is epicontinental depression basin, with characteristics of intracontinental rift basin during Jurassic. Kuruketag uplift undergoes two stage of uplift processes which are early Hercynian and since late Crataceous periods respectively. Conclusion Kongquehe slope and Kuruketag uplift experienced two periods of important tectonic movement which are Hercynian and Yanshan, stage of main tectonic deformation is early Hercynian, folds and associate thrust faults is main deformation style, tectonic-thermal evolution history of basin-mountain system shows that the largest burial depth and highest thermal maturity of Cambrian-Lower Ordovician source rock is formed in early Hercynian. the main hydrocarbon generation stages of Cambrian-Lower Ordovician source rock is from late Caledonian to early Hercynian, Kongquehe slope has not condition of secondary hydrocarbon generation after early Hercynian. Oil and gas exploration direction in Kongquehe slope is seeking trap formed in Hercynian,which has good preservation condition after Hercynian.

关 键 词：塔里木盆地 孔雀河斜坡 库鲁克塔格隆起 盆山系统 裂变径迹 隆升时代 构造-热演化史 

分 类 号：P618.13[天文地球—矿床学]