青藏高原古洋壳恢复与重建问题讨论  

A DISCUSSION ON THE REHABILITATION AND RECONSTRUCTION OF ANCIENT OCEANIC CRUST IN QINGHAI-TIBET PLATEAU

作　　者：高延林 

机构地区：[1]青海省科学技术委员会,西宁810000

出　　处：《青海地质》2000年第1期1-8,共8页

摘　　要：通过雅鲁藏布江和北祁连山南北两个典型蛇绿岩带的研究实践,作者提出并讨论了构造背景与岩石地层相结合、结构构造特征与矿物岩石分析相结合、物理化学成因与区域地质工作相结合、岩石类型年代学与地层年代学研究相结合的蛇绿岩研究思想,以及综合恢复重建古洋壳的古地磁资料分析、扩张速度分析、俯冲速率分析和古生物地理环境分析4种方法,并提供了青藏高原主要古大洋区的有关特征数据。Based on the studies of two typical ophiolite belts of Yarlung Zangbo andNorth Qilian, a study thought of four combinations for ophiolite has been put forward. Thatis combining the tectonic background with rock stratigraphy, combining the structural andtectonic characteristics with minerals and rocks(strata), combining physicochemical genesiswith regional geological works, and combining the petrologic chronology with stratigraphicchronology. Also four analyses methods for comprehensive reconstructing ancient oceaniccrust were discussed, i. e, analyses of palaemagnetic data, expanding velocity, subductionrate, and paleontology and environment. Some characteristic data about the main ancient o-cean on Qinghai-Tibet Plateau was provided.

关 键 词：青藏高原 蛇绿岩 古大洋 古洋壳 

分 类 号：P534[天文地球—古生物学与地层学]