青藏高原新生代火山活动与高原隆升关系  

Relationship Between Cenozoic Volcanism in the Qinghai—Tibetan Plateau and Its Uplifting

作　　者：邓万明[1] 孙宏娟[1] 

机构地区：[1]中国科学院地质研究所,北京100029

出　　处：《地质论评》1999年第S1期952-958,共7页Geological Review

基　　金：国家重点基础理论研究专项经费资助项目;中国科学院青藏高原研究项目(编号KZ951-A1-204;KZ95T-06)的成果

摘　　要：青藏高原新生代火山岩分布广泛,在时代上几乎贯穿了整个第三纪和早第四纪。火山活动与高原岩石圈的构造演化和隆升过程有良好的耦合关系。高原隆起前、后火山岩在地球化学性质及源区的差异,反映了岩石圈深部地质过程的不同特征。火山活动和高原的隆升都表现了多阶段性和非均匀的特点。推测在上新世末高原面已抬升到4000～4500m,更新世以来的强烈隆起主要表现为高原周边造山带的构造活化,青藏高原的隆升是多因素综合作用的结果。Cenozoic volcanic rocks are widespread over the Qinghai—Tibet Plateau. Volcanic eruptions ran through nearly the entire Tertiary and Early Quaternary in age. There is a good coupling relationship between the volcanic activity and lithosphere tectonic evolution and uplifting process of the Plateau. Differences in the geochemistry and sources of the volcanic rocks before and after the uplift of the plateau reflected different characteristics of the deep geological events. Volcanic activity and plateau uplifting show features multistage evolution and nonhomogeneith. From the available data it may be inferred that the plateau came up to 4000 ～ 4500 m at end of the Pliocene. A violent uplift of the plateau since the Pleistocene was mainly reflected in tectonic mobilization around the plateau. The uplifting of the plateau is a composion result the manifold factors.

关 键 词：青藏高原 新生代 火山活动 岩石圈演化 高原隆升 

分 类 号：P542.2[天文地球—构造地质学]