地球学报2001，Vol.22Issue(1)：61-66,6.
青藏高原北缘火山岩中辉石岩包体研究
Pyroxenite Xenolith in the Volcanic Rocks from North Tibet
吴才来 1杨经绥 1李海兵 1史仁灯 2孟繁聪1
作者信息
- 1. 中国地质科学院地质研究所
- 2. Institute of Geology, CAGS,
- 折叠
摘要
Abstract
The pyroxenite xenolith in the volcanic rocks from Hohxil, north Tibet, consists of clinopyroxenes and othopyroxenes. Mineral chemically these pyroxenes are similar to mantle enclaves including peridotite and pyroxenite from China and abroad, and different from ones of granulites. The temperatures and pressures of forming pyroxenes are in ranges of 1 101～1 400 ℃（averaged 1 250 ℃） and 30×108～60×108Pa（averaged 46×108Pa）based on the thermobarometer of Mercier(1980), respectively. Combined with magma dynamics we deduced that magma was derived from the mantle with the depth of more than 150 km, which is fit in with geophysical conclusion that showed the low-velocity zone existed in the mantle under 150 km.关键词
辉石岩包体/矿物化学/可可西里分类
天文与地球科学引用本文复制引用
吴才来,杨经绥,李海兵,史仁灯,孟繁聪..青藏高原北缘火山岩中辉石岩包体研究[J].地球学报,2001,22(1):61-66,6.
