|
|||||
|
|
| 准噶尔盆地中生代演化的地层学和沉积学证据 | |
| 引用本文： | 方世虎,郭召杰,张志诚,徐怀民,刘楼军.准噶尔盆地中生代演化的地层学和沉积学证据[J].高校地质学报,2004,10(4):554-561. |
| 作者姓名： | 方世虎 郭召杰 张志诚 徐怀民 刘楼军 |
| 作者单位： | 1. 北京大学,地球与空间科学学院,北京,100871;中国石油勘探开发研究院,北京,100083 2. 北京大学,地球与空间科学学院,北京,100871 3. 石油大学(北京),北京,昌平,102200 4. 新疆油田分公司,新疆,乌鲁木齐,834000 |
| 基金项目： | 国家重点基础研究发展规划项目 (2 0 0 1CB4 0 980 4 )课题资助 |
| 摘 要： | 准噶尔盆地是一个构造演化复杂、由多个含油气凹陷构成的盆地。根据盆地中生界地层发育特征、地震资料及前人研究成果，探讨了准噶尔盆地中生代的沉积特征、沉积范围、沉积中心迁移特征及断裂对沉积的控制作用，将中生代准噶尔盆地划分为三叠纪—侏罗纪断—拗盆地和白垩纪陆内坳陷盆地两个发育阶段，其中晚侏罗世—早白垩世早期可能是盆地由张性背景向挤压背景转化的重要时期。 |
| 关 键 词： | 准噶尔盆地 中生代 盆地边界 沉积中心 构造演化 |
| 文章编号： | 1006-7493(2004)04-554-08 |
| 修稿时间： | 2003年12月20 |
Mesozoic Tectonic Evolution of Southern Junggar Basin,Northwestern China:Constraints from Stratigraphic and Sedimentologic Evidences |
|
| FANG Shi-hu.Mesozoic Tectonic Evolution of Southern Junggar Basin,Northwestern China:Constraints from Stratigraphic and Sedimentologic Evidences[J].Geological Journal of China Universities,2004,10(4):554-561. | |
| Authors: | FANG Shi-hu |
| Institution: | FANG Shi-hu~ |
| Abstract: | According to the analyses of depositional facies, seismic and geologic information, the Triassic-Jurassic depocenter was near to Urumqi city, and the Cretaceous depocenter migrated northwards to the central part of the Junggar basin. In southern Junggar basin boundary area, the Triassic, especially the Lower Triassic, was a set of strata of braided stream to braided delta facies, suggesting the Triassic basin boundary was near to that of present day. The Lower Jurassic was alluvial-fan to fan-delta facies in Houxia area (80 km south to Urumuqi) and braided delta facies in Toutun River section. The Middle Jurassic was braided delta facies in Houxia area and meandering river to lacustrine facies in Toutun River section. The Houxia area and Tuntun River sections were formed in the same sedimentary system, which suggests a southward migration of the Jurassic basin boundary toward the Houxia area. Consequently, the Junggar basin couldn't be foreland basin during the Triassic-Jurassic. The Upper Jurassic Kalazha conglomerate in southern Junggar basin and the Cretaceous basal conglomerate recorded rapid uplift and denudation during the Late Jurassic to the earliest Cretaceous. The rapid uplift and denudation might be related to the amalgamation of Lhasa block on the south margin of Eurasia plate. The basin boundary shrank obviously in Cretaceous near to southern Junggar basin boundary of present day. The Mesozoic tectonic evolution of Junggar Basin could be divided into two episodes: the extensional faulted-depression from the Triassic to Jurassic and the compressional intra-continent depression in the Cretaceous. |
| Keywords: | Junggar basin Mesozoic basin boundary depocenter tectonic evolution |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |