| 柴达木盆地东段中、新生代沉积迁移规律及原型盆地性质研究 |
| |
| 引用本文： | 冯怀伟,许淑梅,王大华,肖永军,王金铎.柴达木盆地东段中、新生代沉积迁移规律及原型盆地性质研究[J].沉积学报,2022,40(3):667-678. |
| |
| 作者姓名： | 冯怀伟 许淑梅 王大华 肖永军 王金铎 |
| |
| 作者单位： | 1.潍坊科技学院, 山东 潍坊 262700 |
| |
| 基金项目： | 中国石油化工股份有限公司胜利油田分公司科技攻关项目 |
| |
| 摘 要： | 为明确柴达木盆地东段中、新生代沉积迁移变化及原型盆地性质，通过对柴达木盆地东段红山、霍布逊凹陷中、新生界野外地质露头追踪、钻井（孔）资料分析、岩性岩相分析、二维地震剖面解释、地层划分对比及平衡地质剖面恢复的研究，认为中、新生代沉积迁移呈现出形象的“跷跷板”移动现象，这种现象与凹陷所处的大地构造位置、盆地性质及板块运动的远程效应有关。下侏罗统局限于红山小型断陷盆地，中侏罗统范围向南扩大到霍布逊凹陷，与羌塘板块、拉萨地块与亚欧板块两次俯冲挤压碰撞之间的应力松弛作用有关，此作用在早侏罗世导致北部红山地区的板缘裂陷，在中侏罗世扩展到南部的霍布逊地区；晚侏罗世和早白垩世沉积中心位于红山挤压型盆地，这与拉萨地块与欧亚板块碰撞的远程效应导致柴北缘地区构造反转有关；古近系在北部红山凹陷的发育而在南部霍布逊凹陷的缺失，与新特提斯洋东部闭合首先导致霍布逊地区隆升有关；新近系及第四系主要分布在南部霍布逊凹陷，与此时柴北缘及周缘山系全面隆升导致沉积中心南移有关。
|
| 关 键 词： | 中、新生界 沉积迁移 原型盆地 板块运动 柴达木盆地东段 |
| 收稿时间： | 2020-05-26 |
Study of the Process of Sedimentary Migration,and Mesozoic and Cenozoic Prototype Basins,Eastern Segment of Qaidam Basin |
| |
| FENG HuaiWei,XU ShuMei,WANG DaHua,XIAO YongJun,WANG JinDuo.Study of the Process of Sedimentary Migration,and Mesozoic and Cenozoic Prototype Basins,Eastern Segment of Qaidam Basin[J].Acta Sedimentologica Sinica,2022,40(3):667-678. |
| |
| Authors: | FENG HuaiWei XU ShuMei WANG DaHua XIAO YongJun WANG JinDuo |
| |
| Institution: | 1.Weifang University of Science and Technology, Weifang, Shandong 262700, China2.College of Marine Geosciences, Ocean University of China, Qingdao, Shandong 266100, China3.Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Qingdao, Shandong 266100, China4.Exploration and Development Research Institute, Shengli Oilfield, SINOPEC, Dongying, Shandong 257000, China |
| |
| Abstract: | This clarification of the changes in sedimentary migration and Mesozoic and Cenozoic prototype basins in the eastern segment of the Qaidam Basin was based on a field geological survey of Mesozoic and Cenozoic strata. Interpretation of seismic sections， analysis of lithofacies features， division and correlation of the strata， and a study of balanced geological cross-sections found that the sedimentary migration took place in a teeterboard， or seesaw， manner. This phenomenon is related to the geotectonic location， the basin prototypes and continental plate motion. Lower Jurassic strata is localized in the Hongshan small fault basin. With protracted rifting， Middle Jurassic deposits appear in the Huobuxun Sag， related to tensile stress caused by the collision of the Qiangtang and Lhasa Plates with the southern margin of the Eurasian Plate during the Early-to-Middle Jurassic. Northward movement of the sedimentary scope of Upper Jurassic and Lower Cretaceous strata was related to the collision between the Lhasa Terrane and Eurasian Plate， which led to structural inversion of the northern Qaidam Block. The appearance of Paleogene strata only in the Hongshan Sag， and not in the Huobuxun Sag， is associated with closure of the eastern Neotethys， which resulted in uplift of the Huobuxun region. Neogene and Quaternary strata occur mainly in the Huobuxun Sag， due to the overall uplift of the mountains in the northern Qaidam Basin. |
| |
| Keywords: | |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《沉积学报》浏览原始摘要信息 |
| 点击此处可从《沉积学报》下载免费的PDF全文 |
|
