青藏高原整体隆升与地壳短缩增厚的物理－力学机制研究（下）  

PHYSICAL MECHANICAL MECHANISM FOR THE WHOLE UPLIFTING OF THE QINGHAI XIZANG PLATEAU AND THE LATERAL SHORTENING AND VERTICAL THICKENING OF THE CRUST

作　　者：滕吉文[1] 张中杰[1] 胡家富[1] 尹周勋[1] 刘宏宾 万志超[1] 杨顶辉[1] 张秉铭[1] 张慧[1] 

机构地区：[1]中国科学院地球物理研究所

出　　处：《高校地质学报》1996年第3期307-323,共17页Geological Journal of China Universities

摘　　要：青藏高原整体隆升与地壳短缩增厚的物理－力学机制研究＊（下）滕吉文张中杰胡家富尹周勋刘宏宾万志超杨顶辉张秉铭张慧（中国科学院地球物理研究所）（承接本刊２卷２期１３３页）４青藏高原隆升与地壳短缩的物理－力学机制讨论青藏高原平均高度为４５００ｍ，面积达３０...The Himalayan movement is the latest strong movement of the crust and the most important geological event in Asia during the Mesozoic and Cenozoic Eras. This movement, which has built up the Himalayan Mountains and is still in progress, affects a wide area of eastern Aisa and is regarded as the cause for whole uplifting of the Qinghai Xizang Plateau. A variety of hypotheses have been suggested for this uplifting mechanism, but none of them is convincible. In order to investigate the physical mechanical mechanism for the whole establish and to establish a geodynamic model for crustal shortening and thickening, this paper, starting from discussions on the tectonic framework, crust and mantle structure and geophysical field, will be concentrated on the following five problems: 1. The basic models for the formation of thick crust, thin lithosphere, deep faults of varying features and for thrusting, intersecting and collisional orogeny. 2. Earthquake activities, fault plane solution and stress fields. 3. Plate movement, terrain amalgamation and continental accretion. 4. Physical mechanical mechanism for uplifting of the Qinghai Xizang Plateau. 5. Geodynamic model for the uplifting. As a result of the northward movement of the India plate and its collision with the Eurasia continent, the long term tectonic compression has rendered the plateau area anomalous earthquakes and stress fields, strong hydrothermal activities, rapid southward declining of Lg wave energy and strengthening of the Q value, as well as the pattern of southward increasing of crustal temperature and “hot” crust relative to “cold” mantle in the lithosphere. Gravity isostasy has not yet been reached at both south and north piedmonts, and high mountains have been continuously uprising. The ophiolite suite emplaced along the Yaluzangbu River extends 1700km in length. A series of strike slip faults were formed and rocks were strongly deformed. A transitional zone, 300 to 500km in width between the north margin of the Ganges Plain and

关 键 词：青藏高原 整体隆升 地壳短缩 增厚 物理力学 

分 类 号：P542.3[天文地球—构造地质学] P553[天文地球—地质学]