摘要
吉林省红旗岭地区目前正在开采的铜镍硫化物矿床共有5个,均属岩浆熔离型矿床。矿石矿物磁黄铁矿显微镜下可识别出3个同质多象变体:陨硫铁(tr)、六方磁黄铁矿(hpo)和单斜磁黄铁矿(pm)。其基本结构主要为NiAs型,具有较高的Ni+Cu+Co含量,与相应的地幔包体成分相近。镍黄铁矿也有高温结晶型、低温出溶型和低温结晶型3种类型。电子探针微区成分分析显示了同种矿物的不同变种在成分上具有继承与关联性。在该矿床首次发现的辉砷镍矿的存在和黄铁矿的标形特征说明含SAs流体的交代作用在成岩后期普遍存在,为分析红旗岭铜镍硫化物矿床的成矿机制研究提供了矿物学信息。
5 CuNi sulfide deposits are being mined in Hongqiling area, Jilin Province, China. All the five deposits are believed to be magmatic liquation type. Pyrrhotite in the Hongqiling area has three subtypes: trolite(tr), hexagonal pyrrhotite(hpo) and monoclinic pyrrhotite(mpo). They all belong to NiAs type and are relatively high in Ni+Cu+Co, being similar to the composition of pyrrhotite in mantle-derived inclusions. Pentlandite also has three mutations: high temperature crystallization, low temperature exsolution and low temperature crystallization. Analysis on the composition of the different mineral mutations by electrical probe indicates the linkage among them. The newly found gersdorffite in the deposit, as well as the typomorphic features of pyrite indicates the prevalence of replacement at the late stage of mineralization and the abundance of S and As in related hydrothermal fluids. Hence, the research on ore minerals in the Hongqiling CuNi sulphide deposit provided some important information for understanding the ore-forming and ore-control mechanism .
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2004年第3期338-343,共6页
Journal of Jilin University：Earth Science Edition
