成都理工大学学报（自然科学版）2017，Vol.44Issue(5)：579-588,10.DOI:10.3969/j.issn.1671-9727.2017.05.08
甘肃干沙鄂博稀土矿床成矿介质演化过程:来自包裹体的信息
Research on evolution process of ore-forming medium in Ganshaebo REE deposit, Gansu, China: Information from inclusions
摘要
Abstract
The characteristics,evolution of the ore-forming medium and precipitation mechanism of the Ganshaebo REE deposit are studied based on geological investigation and petrography and research of micro-thermometry of fluid inclusions in quartz,fluorite and calcite.A large amount of inclusions have been found in the ore of the deposit and according to the characteristics of composition and phase behavior at room temperature,seven types of the inclusions have been recognized,including melt inclusions,fluid-melt inclusions,H2O inclusions,CO2 inclusions,CO2-H2O inclusions,daughterbearing H2O inclusions and daughter-bearing CO2-H2O inclusions.During the ore-forming process,the inclusion types change from melt inclusion into fluid-melt inclusion+ fluid inclusion,and then to fluid inclusion.It imply that the ore-forming medium varied from magma to magma+hydrothermal,and then to hydrothermal solution.Two types of immiscibility took place during the magmahydrothermal metallogenic period,the early magma-hydrothermal immiscibility is characterized by the occurrence of abundant fluid-melt inclusions,resulting in the precipitation of fluorite and REEfluorine carbonates,and the late CO2-H2O immiscibility is characterized by the coexistence of H2O-rich CO2-H2O inclusions and CO2-rich CO2-H2O inclusions,leading to the precipitation of sulfides.关键词
流体-熔体包裹体/不混溶作用/稀土矿床/干沙鄂博Key words
fluid-melt inclusion/immiscibility/REE deposit/Ganshaebo分类
天文与地球科学引用本文复制引用
李葆华,陈晨,董晓燕,黄增保,高昆丽,傅太宇,郑惠..甘肃干沙鄂博稀土矿床成矿介质演化过程:来自包裹体的信息[J].成都理工大学学报（自然科学版）,2017,44(5):579-588,10.基金项目
国家自然科学基金项目(41372094). （41372094）
