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.
出处
《高校地质学报》
CAS
CSCD
北大核心
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)
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
eclogite
UHP belt
deep subduction of oceanic crust
western Alps
Southwestern Tianshan
China
