岩石矿物学杂志2013，Vol.32Issue(1)：23-40,18.
广东省天堂铜铅锌多金属矿床矽卡岩矿物学特征及其地质意义
Skarn mineral characteristics of the Tiantang Cu-Pb-Zn polymetallic deposit in Guangdong Province and their geological significance
摘要
Abstract
The large Tiantang Cu-Pb-Zn polymetallic skarn deposit in Yuexi area is hosted in limestone of Devonian Tianziling Formation, and the ore bodies occur in the skarn and skarnized marble in stratoid, lamellar, lenticular and irregular forms. Metallic minerals consist mainly of chalcopyrite, galena, sphalerite and pyrite, whereas gangue minerals are composed of garnet, diopside, epidote, wollastonite, chlorite etc. With skarn minerals as the study object and by using electron microprobe technology, the authors investigated the mineralogical characteristics. Electron microprobe analyses show that the skarns in the Tiantang Cu-Pb-Zn polymetallic deposit belong to typical calcic skarns. Garnets in the ore deposit are mainly andradite-grossularite and varied with time from grossular to andradite, suggesting that the ore-forming fluid had a evolutionary trend from acidic to basic. Augites are mainly diopside. Components of garnet and proxene are Adr4.60-96.47 Grs2.10~94.28 (Prp + Sps)0.41~3.88 and Di88.51-95.09 Hd3.31-9.76 Jo0.28-3.98. respectively, and their wide compositional variation range suggests that skarns were not formed under a totally enclosed equilibrium condition. The end member of the epi-dote group is dominated by epidote, and contains a little zoisite. The Mn/Fe ratio of pyroxene may be related to mineral metals. Characteristics of skarn in the Tiantang Cu-Pb-Zn polymetallic deposit shows that it is a typical skarn deposit resulting from the replacement of the marble by granitoid magma.关键词
粤西地区/天堂铜铅锌多金属矿床/矿物学特征/电子探针分析/矽卡岩Key words
Yuexi area/ Tiantang Cu-Pb-Zn polymetallic deposit/ mineral characteristics/ electron microprobe analysis/ skarn minerals分类
天文与地球科学引用本文复制引用
郑伟,陈懋弘,赵海杰,徐林刚,张东阳,凌世彬,姚磊,于淼,常利忠..广东省天堂铜铅锌多金属矿床矽卡岩矿物学特征及其地质意义[J].岩石矿物学杂志,2013,32(1):23-40,18.基金项目
中国地质调查局地质调查工作项目(1212011120831) （1212011120831）
国家自然科学基金(40930419) （40930419）
国家重点基础研究发展计划973课题(2012CB416704) （2012CB416704）
