西阿尔卑斯Zermatt-Saas洋壳深俯冲超高压变质带与我国新疆西南天山超高压变质带的比较  

A Comparative Study on the UHP Metamorphic Ophiolitic Rocks in Zermaat-Saas Zone, Western Alps and Western Tianshan, China

作　　者：张立飞[1] 吕增[1] 李旭平[2] Kurt Bucher 

机构地区：[1]造山带与地壳演化教育部重点实验室北京大学地球与空间科学学院 [2]山东科技大学地球资源学院 [3]Institute of Mineralogy,University of Freiburg,Alberstrasse 23b,D-79104 Freiburg,Germany

出　　处：《高校地质学报》2007年第3期498-506,共9页Geological Journal of China Universities

基　　金：国家自然科学基金(40325005)

摘　　要：根据对西阿尔卑斯Zernatt-Saas带的野外地质考察及有关资料的总结,详细地介绍了西阿尔卑斯Zermatt-Saas洋壳深俯冲超高压变质带的地质概括、岩石组成和变质作用演化过程,并着重与我国新疆西南天山洋壳深俯冲超高压变质带进行了比较,探讨了这两个洋壳深俯冲超高压变质带在变质作用和地质演化方面的异同。在此基础上,总结了这两个目前世界上已知最典型的洋壳深俯冲超高压变质带的基本地质特征是都具有保存完好的洋壳岩石组合特征和较低的地热梯度。The general geology of ultrahigh pressure （UHP） metamorphic ophiolitic belt in Zermatt-Saas, western Alps, especially the petrologic characteristics and metamorphic evolution, is introduced in this paper. Based on the comparative study of geology, petrology and geochronology between two typical UHP ophiolitic belts in the Zermatt- Saas zone, western and the Chinese Tianshan belt, the general characteristics of UHP ophiolitic belt such as lower geothermal gradient and preservation of pillow lava structure of oceanic basalt are discussed in this paper.

关 键 词：榴辉岩 超高压变质带 洋壳深俯冲 西阿尔卑斯 新疆西南天山 

分 类 号：P588.34[天文地球—岩石学]