现代地质2017，Vol.31Issue(4)：757-767,11.
贵州紫云方解石矿床地球化学特征及成因研究
Study on Geochemical Characteristics and Genesis of Calcite Deposit from Ziyun County, Guizhou Province, China
摘要
Abstract
The Ziyun calcite deposit is a newly discovered non-metallic deposit in southwest of Guizhou Province.Orebodies are veined,lenticulared or stratoid in form and are hosted in the carbonate rocks and are found to have been developed in the faults.Calcite is the dominant mineral.The ores revealed a variety of hydrothermal structural characteristics.Ore samples were collected from Huoshanguan,Daze,etc.at Ziyun County and were tested for the isotope geochemistry,trace and rare earth element contents.The carbon and oxygen isotope geochemistry indicate that metallogenetic material came from marine carbonate rocks.Ore-forming fluids are dominated by HCO3-,and thus a great amount of precipitation is added in the following mineralization,which has not a close relationship with magma.In contrast to the surrounding rocks,the Daze ore block has obvious characteristics by analysis of different REE distribution patterns,Eu positive anomalies and high content of Sr,Zn and Ni.This indicates that the ore-forming fluid was probably from deep source evolved in the process of mineralization of the Daze ore block.Both the orebodies and the surrounding rocks have similar REE distribution pattern and regularity variation of ∑ REE in the Huoshanguan,Dalao and other ore blocks,which shows that the metallogenetic material may come from carbonate rocks.Compared with the regional mineralization,metallogenetic epoch of the calcite deposit could be Indo-Yanshanian.关键词
地球化学特征/碳、氧同位素/方解石矿床/紫云/贵州Key words
geochemical characteristic/carbon and oxygen isotope/calcite deposit/Ziyun County/Guizhou Province分类
天文与地球科学引用本文复制引用
曹正端,杨瑞东,高军波,陈军,张伟,沈明联,张旭,李纪..贵州紫云方解石矿床地球化学特征及成因研究[J].现代地质,2017,31(4):757-767,11.基金项目
贵州省国土资源厅公益性、基础性研究项目(201503404) （201503404）
贵州大学重点学科建设项目(ZDXK[2015]20). （ZDXK[2015]20）
