A New Intergrowth Consisting of FeO and SiO2 Phases from Lower Mantle

• 来源期刊: 大陆动力学（英文版）
• 学科: 地球科学
• 关键词: intergrowth wiistite quartz chromitite ophiolite Tibet
• 年，卷（期）: 2001,（2）
• 页码范围: 1-7
• 页数: 7页
• 分类号: P5
• 语种: 英文

摘要

A grain of unexpected mineral composed of FeO (wiistite) and SiO2 (quartz) with au intergrowth structure was found in ophiolitic chromitite, Luobusa, Tibet. According to high-pressure and temperature experimental studies, this intergrowth broke down from a silicate mineral (perovskite?),suggesting that it is possibly found in mantle depth of more than 670 km.