摘要
主要从时空分布、岩石学、矿物学、地球化学及C-O-Sr-Nd-Pb同位素特征等方面对碳酸岩进行全面总结,结合近20年来的实验岩石学资料,论述了其岩浆的分异演化过程、地幔交代作用及源区物质组成。碳酸岩具有极高的Sr、Ba和稀土含量(平均ΣREE=3731),Sr-Nd-Pb放射性同位素、C-O稳定同位素和惰性气体组成以及实验岩石学证据,均指示碳酸岩来自地幔,几乎没有受到地壳物质的混染。碳酸岩研究仍存在诸多争议,但本文认为,越来越多的证据显示碳酸岩的形成与大火成岩省以及地幔柱活动有密切的时空联系。
The paper introduces a comprehensive summary about the spatio-temporal distribution,petrology,mineralogy,geochemistry and C-O-Sr-Nd-Pb isotopic features of carbonatite.On the basis of experimental petrology data in recent 20 years,the differential evolution of carbonatitic magma,mantle metasomatism and material compositions of mantle sources are discussed.The carbonatite has very high abundances of Sr,Ba and rare-earth elements（averageΣREE=3731）.The carbonatite is derived from the mantle without contamination of the crust based on the carbonatitic Sr-Nd-Pb isotopic data,C-O isotopic compositions,noble gases,and experimental phase equilibria.There are still many controversial issues about study of carbonatite,but more and more evidences indicating carbonatite related to large igneous provinces（LIPs）and mantle plume in time and space are found.
出处
《资源调查与环境》
2015年第1期21-27,共7页
Resources Survey & Environment
基金
国家自然科学基金项目(项目编号:40703009
41373021)资助
关键词
碳酸岩
岩石学
地球化学
地幔源区
地幔柱
carbonatite
petrology
geochemistry
mantle source
mantle plume
