云南保山核桃坪铅锌矿床角闪石和绿帘石族矿物特征

云南保山核桃坪铅锌多金属矿床是一个与典型矽卡岩矿床及其类似的大型铅锌矿床,矿体内矽卡岩角闪石和绿帘石族矿物分布广、颜色变化大,矿化好,是开展核桃坪铅锌矿床成因研究的一个重要切入点.通过电子探针对核桃坪铅锌矿床主矿体中的角闪石和绿泥石族矿物进行分析,并进行晶体化学计算.核桃坪铅锌多金属矿床中角闪石族矿物属于钙角闪石亚族,主要以铁阳起石及铁钙镁闪石为主,表现出富铁、富钙的特征;绿帘石族矿物主要为褐帘石及富铁绿帘石,总体呈现出较富铁的特征;并且不同矿物的产出形态在一定程度上反映了矿物晶体的不同生长环境,对于矿床成因的研究有着重要的指示意义.

The Mineralogy of Amphibole Group and Epidote Group from Hetaoping Lead-zinc Polymetallic Deposit in Baoshan,Yunnan

Hetaoping Pb- Zn polymetallic deposits is a large polymetallic deposit which is similar with skarnminerals. Amphibole group and Epidote group,as one of the most typical and important skarn minerals in theHetaoping lead- zinc polymetallic deposit,is a key point for study of skarn due to its wide distribution,variouscolors and strong mineralization. Electron microprobe analysis was conducted on Garnet of No.1 orebody of the mainorebody in Hetaoping lead-zinc polymetallic deposit,and crystal chemical calculations. It was suggested that theAmphibole group of this deposit is mainly consisted of Actinolite and Iron Calcium Magnesium Amphibole,andEpidote group is mainly consisted of Allanite and Iron Epidote. The common characteristics of the both mineral isconsist of Iron,to some extent,their different characteristics of mineral revealed different growing environment.