| 西藏措勤盆地晚中生代构造-岩相演化 |
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| 引用本文： | 刘燊,李才,杨德明,王天武,杨日红.西藏措勤盆地晚中生代构造-岩相演化[J].吉林大学学报(地球科学版),2000,30(2):134-138,156. |
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| 作者姓名： | 刘燊 李才 杨德明 王天武 杨日红 |
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| 作者单位： | 长春科技大学,地球科学学院,吉林,长春,130026 |
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| 基金项目： | 中国石油天然气集团公司“九五”科技工程资助项目!(970 2 0 4- 0 2 - 0 3) |
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| 摘 要： | 措勤盆地的主要形成、发育期为中生代。由于受南、北两条特提斯构造带的影响 ,盆地内东西向构造岩相分带比较明显 ,并与一定的沉积环境相对应 ,即由海相 -三角洲相 -滨滩相 -台地相 -陆相沉积。晚中生代措勤盆地的地层说明了盆地的演化经历了从沉陷—稳定—隆起的构造旋回过程 ,从而反映了从裂谷—洋盆—残余海封闭及断陷盆地发育的沉积历史。在盆地内 ,川巴—色林错地区发育了一套具有一定生油条件、富含有机质的残留海盆沉积 ,同时 ,该地区在白垩纪又经历了海进—海退旋回 ,这为该区储油盖层的形成和配置提供了优越的沉积条件。因此该区具有良好的油气远景。
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| 关 键 词： | 西藏措勤盆地 晚中生代 构造-岩相带 演化 |
THE EVOLUTION OF LATE-MESOZOIC TECTONIC-PETROGRAPHIC FACIES IN COQ(E)N BASIN,TIBET |
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| LIU Shen,LI Cai,YANG De-ming,WANG Tian-wu,YANG Ri-hong.THE EVOLUTION OF LATE-MESOZOIC TECTONIC-PETROGRAPHIC FACIES IN COQ(E)N BASIN,TIBET[J].Journal of Jilin Unviersity:Earth Science Edition,2000,30(2):134-138,156. |
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| Authors: | LIU Shen LI Cai YANG De-ming WANG Tian-wu YANG Ri-hong |
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| Abstract: | Mesozoic is the main period of formation and development of Coqn basin. Under the influence of the two Tethy structural belts(North and South), the EW tectonic-petrographic facies zoning is fairly obvious inside the basin. The zone of facies corresponds with specified depositional environment, namely the transition stage from marine facies to delta facies, to offshore beach facies, to plateau facies and to land facies. The strata records of Mesozoic Coqn basin show that the basin has gone through a tectonic cycle process of depression-stabilization-swelling, showing the depositional history of rift to ocean basin to residual sea sealing up and faulted basin development.There are a series of residual basin sediments in Chuanba-Selincuo area of this basin, which are favorable producing oil and rich in organism. Meanwhile, the region has undergone a cycle of ingression-regression in Cretaceous, providing a favourable depositional condition for the formation and allocation of the cap formation. All that can be said is that this region has hopeful prospects for oil and gas prospecting. |
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| Keywords: | Tibet Coqn basin late-Mesozoic tectonic-facies belts evolution |
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