Dense hydrous silica carrying water to the deep Earth and promotion of oxygen fugacity heterogeneity

作     者：Yanhao Lin Ho-Kwang Mao Yanhao Lin;Ho-Kwang Mao

作者机构：Center for High Pressure Science and Technology Advanced ResearchBeijing 100193People’s Republic of China 

出 版 物：《Matter and Radiation at Extremes》 (极端条件下的物质与辐射（英文）)

年 卷 期：2022年第7卷第6期

页      面：76-78页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：国家自然科学基金 

主　　题：Earth mantle silica 

摘      要：Water has remarkable effects on the properties of mantle rocks,but,owing to the high temperatures in the mantle,uncertainties remain about how and how much water is transported into the deep *** studies have shown that stishovite and post-stishovites as highpressure phases of SiO2 have the potential to carry weight percent levels of water into the Earth’s interior along the geotherm of the subducting oceanic *** slabs are subducted to the deepest mantle,dehydration of these dense hydrous silica phases has the potential to change the physicochemical properties of the mantle by reducing melting points,forming new high-pressure phases,and enhancing the oxygen fugacity heterogeneity of the lower mantle.