巴基斯坦盐岭东部新生代演化过程及对喜山运动幕次的响应
发布时间：2019-02-24 16:33
【摘要】：巴基斯坦盐岭地区位于印度板块北部,与其北部的波特瓦尔盆地一同接受了新生代早期沉积。区内自古新世和始新世的滨海相-海相沉积起,经渐新世抬升剥蚀,中新世以来转为陆相前陆沉积,沉积了巨厚层河流-冲积相碎屑岩,至更新世后期开始逆冲成山,而其北部波特瓦尔盆地相应地进入破裂前陆盆地演化期,在其南部形成新的前陆沉积区。盐岭新生代演化过程中两个关键时间点分别为渐新世末和上新世末,前者完成了沉积环境由洋到陆的转变,后者使盐岭隆升成山,改变了区域构造格局,这两个时间点对应喜马拉雅运动Ⅰ幕和Ⅱ幕。盐岭东部地区新生代的演化与印度-欧亚板块的俯冲-碰撞息息相关,且在演化的关键时间点上密切呼应,其新生代演化过程对我国青藏高原隆升意义重大。
[Abstract]:The Salt Ridge region of Pakistan, located in the northern part of the Indian Plate, received early Cenozoic deposits along with the Bolvar Basin in the north. Since Paleocene and Eocene, the littoral facies and marine facies have been deposited in the area, after the Oligocene uplift and denudation, they have been converted into continental Foreland deposits since the Miocene, and have deposited huge thick fluvial alluvial clastic rocks, which began to thrust into mountains during the late Pleistocene. The northern Bolvar basin correspondingly entered the evolution period of the fractured Foreland basin and formed a new Foreland sedimentary area in the southern part of the basin. The two key time points in the Cenozoic evolution of Yanling are the end of Oligocene and the end of Pliocene. The former has completed the transition of sedimentary environment from ocean to land, and the latter has made the Yanling uplift into a mountain and changed the regional tectonic pattern. These two time points correspond to the Himalayan movement acts I and II. The evolution of the Cenozoic in the eastern Yanling area is closely related to the subduction and collision of the Indo-Eurasian plate and is closely echoed at the critical time point of evolution. The Cenozoic evolution process is of great significance to the uplift of the Qinghai-Xizang Plateau in China.
【作者单位】： 西北大学地质学系大陆动力学国家重点实验室;中国煤炭地质总局航测遥感局;
【基金】：国家自然科学基金项目(41330315,91214301,90814005) 西北大学大陆动力学国家重点实验室科学技术部专项
【分类号】：P542
，
本文编号：2429727
[Abstract]:The Salt Ridge region of Pakistan, located in the northern part of the Indian Plate, received early Cenozoic deposits along with the Bolvar Basin in the north. Since Paleocene and Eocene, the littoral facies and marine facies have been deposited in the area, after the Oligocene uplift and denudation, they have been converted into continental Foreland deposits since the Miocene, and have deposited huge thick fluvial alluvial clastic rocks, which began to thrust into mountains during the late Pleistocene. The northern Bolvar basin correspondingly entered the evolution period of the fractured Foreland basin and formed a new Foreland sedimentary area in the southern part of the basin. The two key time points in the Cenozoic evolution of Yanling are the end of Oligocene and the end of Pliocene. The former has completed the transition of sedimentary environment from ocean to land, and the latter has made the Yanling uplift into a mountain and changed the regional tectonic pattern. These two time points correspond to the Himalayan movement acts I and II. The evolution of the Cenozoic in the eastern Yanling area is closely related to the subduction and collision of the Indo-Eurasian plate and is closely echoed at the critical time point of evolution. The Cenozoic evolution process is of great significance to the uplift of the Qinghai-Xizang Plateau in China.
【作者单位】： 西北大学地质学系大陆动力学国家重点实验室;中国煤炭地质总局航测遥感局;
【基金】：国家自然科学基金项目(41330315,91214301,90814005) 西北大学大陆动力学国家重点实验室科学技术部专项
【分类号】：P542
，
本文编号：2429727
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