| 西构造结—帕米尔及周边深部结构与构造探榷 |
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| 引用本文： | 王谦身,滕吉文,陈石,文武,张永谦,徐伟民.西构造结—帕米尔及周边深部结构与构造探榷[J].地球物理学报,2020,63(8):2970-2977. |
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| 作者姓名： | 王谦身 滕吉文 陈石 文武 张永谦 徐伟民 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所, 北京 100029;2. 吉林大学地球探测科学与技术学院, 长春 130026;3. 中国地质科学院矿产资源研究所, 北京 100037;4. 中国地震局地球物理研究所, 北京 100081 |
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| 基金项目： | 国家自然科学基金面上项目（41774090）和国家自然科学基金地震联合基金项目（U1939205）资助. |
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| 摘 要： | 帕米尔高原是五大山脉汇结之中心,被称为"西构造结".在此山高耸谷陡深是人迹罕至的无人区.应用稀少的地面重力和人工地震数据和卫星重力资料,以NNW和NEE向两条长达1620 km的十字交叉剖面,对帕米尔高原地区地壳深部结构与区域地质构造进行了研讨.帕米尔高原中心地区地壳厚度(莫霍界面深度)接近70 km,并在总体上呈向四周逐渐延展减薄(变浅)的总趋势,到帕米尔的周边地区减薄为50余km左右.这里是一个壳幔结构变异的构造强烈活动地域.
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| 关 键 词： | 帕米尔 西构造结 重力异常 密度结构 地壳厚度 |
| 收稿时间： | 2020-02-04 |
Deep structure beneath the western Himalayan syntaxis-Pamir and surroundings and tectonic implications |
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| WANG QianShen,TENG JiWen,CHEN Shi,WEN Wu,ZHANG YongQian,XU WeiMin.Deep structure beneath the western Himalayan syntaxis-Pamir and surroundings and tectonic implications[J].Chinese Journal of Geophysics,2020,63(8):2970-2977. |
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| Authors: | WANG QianShen TENG JiWen CHEN Shi WEN Wu ZHANG YongQian XU WeiMin |
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| Institution: | 1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2. College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China;3. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Bejing 100037, China;4. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | The Pamir plateau is the center of the confluence of the five mountain ranges, known as the western Himalayan syntaxis. It is inaccessible to the human being due to the high mountains and steep valleys. In this paper, we study the deep crustal structure and regional geological structure of the Pamir plateau region using two NNW and NEE trending crossing profiles with 1620 km in length, on which the limited ground gravity, artificial seismic data and satellite gravity data are available. Results show that the crustal thickness (the depth of Moho) in the central Pamir plateau is about 70 km, overall with a thinning trend (shallower) from the center to the rim, about 50 km in the surroundings of Pamir. This area is characterized by intense tectonic activity and obvious variation of crust and mantle structures. |
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| Keywords: | Pamir Western tectonic belt junction Gravity anomaly Density structure Crustal thickness |
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