|
|||||
|
|
| 塔里木盆地库车坳陷三叠纪沉积相与古地理研究 | |
| 引用本文： | 纪云龙,丁孝忠,李喜臣,于开宁.塔里木盆地库车坳陷三叠纪沉积相与古地理研究[J].地质力学学报,2003,9(3):268-274. |
| 作者姓名： | 纪云龙 丁孝忠 李喜臣 于开宁 |
| 作者单位： | 1. 中国地质大学能源地质系,北京,100083;国家地震局地壳应力研究所,北京,100085 2. 中国地质大学能源地质系,北京,100083;中国地质科学院地质研究所,北京,100037 3. 中国地质大学能源地质系,北京,100083 4. 石家庄经济学院,石家庄,050031 |
| 基金项目： | 国家重点基础研究发展规划项目(973)《中国典型叠合盆地油气形成富集与分布预测》之子课题《中国典型叠合盆地层序地层分析与构造古地理—岩相古地理再造》(课题编号:G1999043304) |
| 摘 要： | 库车坳陷继晚二叠世的厚层磨拉石沉积之后，三叠纪开始进入封闭的挤压挠曲型盆地发展阶段，拉开了中生代前陆盆地发展的序幕，构造格局和构造样武较古生代发生很大转变。盆地内三叠纪气候湿热，沉积相类型多样。靠近北部山前发育大套冲积扇、扇三角洲和辫状三角洲沉积，向坳陷中心有辫状三角洲、曲流河和湖泊沉积。河漫沼泽上发育多套煤层。其滨湖、沼泽相炭质泥岩及煤系建造是库车坳陷重要的烃源岩。在整个三叠纪演化的不同时期，逆冲挤压应力逐渐增强又逐渐减弱，各时期盆地的古地理特征不同。从早三叠世到晚三叠世，盆地的沉积和沉降中心持续南迁，前缘隆起则持续向前陆方向后退。三叠纪前缘隆起和北部逆冲带在轮台以东连通，该连通古陆从早三叠世至晚三叠世持续由东向西移动，但迁移幅度不大，在晚三叠世时期成为一个次要物源区。 |
| 关 键 词： | 塔里木盆地 库车坳陷 三叠纪 沉积相 古地理 |
| 文章编号： | 1006-6616(2003)03-0268-07 |
| 收稿时间： | 2003/7/17 0:00:00 |
| 修稿时间： | 2003年7月17日 |
TRIASSIC PALEOGEOGRAPHY AND SEDIMENTARY FACIES OF THE KUQA DEPRESSION,TARIM BASIN |
|
| JI Yun-long,DING Xiao-zhong,LI Xi-chen and YU Kai-ning.TRIASSIC PALEOGEOGRAPHY AND SEDIMENTARY FACIES OF THE KUQA DEPRESSION,TARIM BASIN[J].Journal of Geomechanics,2003,9(3):268-274. | |
| Authors: | JI Yun-long DING Xiao-zhong LI Xi-chen and YU Kai-ning |
| Institution: | Energy Resources Dept., China University of Geosciences, Beij ing 100083;Institute of Crustal Dynamics, China Seismological Bureau, Beijing 100085,Energy Resources Dept., China University of Geosciences, Beij ing 100083;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037,Energy Resources Dept., China University of Geosciences, Beij ing 100083 and Shijiazhuang College of Economics, Shijiazhuang 050031, Hebei, China |
| Abstract: | After the deposition of Late Permian thick-bedded molas s es,the Kuqa depression began to enter a stage of development of a closed compres s ional flexural basin in the Triassic,thus ushering in the stage of development o f a Mesozoic foreland basin,when the tectonic framework and style were very diff erent from those in the Paleozoic.The Triassic climate in the basin was wet and hot and the sedimentary facies were very diverse.There are deposits of alluvial fans,fan deltas and braided deltas near the piedmont belt in the northern part.T owards the center of the depression,there are deposits of braided deltas and mea nder ing rivers and lakes.Several coal beds are developed in backswamp deposits.Lakes hore and swampy carbonaceous mudstone and coal measures are major hydrocarbon so urce rocks of the Kuqa depression.In different phases of the entire Triassic evo lution,thrust compressional stresses increased gradually and weakened gradually. The paleogeographic features in various phases were different.From the Early Tri assic to Late Tiassic,the depocenter and subsidence center moved southward progr essively,while the frontal uplift retreated toward the foreland continually.The Triassic frontal uplift and northern thrust belt were connected to the east of L u ntai.This connected oldland moved westward steadily from the Early to Late Trias sic but the magnitude of migration was not large.In the Late Triassic it became a subordinate material source. |
| Keywords: | Kuqa depression Triassic sedimentary facies paleogeogra phy |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《地质力学学报》浏览原始摘要信息 | |
| 点击此处可从《地质力学学报》下载免费的PDF全文 | |