ANALYSIS ON THE GEOLOGY AND PROSPECTING POTENTIAL OF VEIN COPPER DEPOSITS IN SOUTHEASTERN HUBEI PROVINCE: A Case Study of Liujialong Orefield in Daye City
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摘要:
鄂东南矿集区殷祖岩体南部的刘家垄矿区，勘探线和钻孔显示刘家垄铜矿体主要倾向南、南西，受到毛铺-两剑桥东西断裂带的构造控制.矿体主要集中在石英闪长岩体与志留系碎屑岩接触交代部位，在岩体内侧赋存成矿.矿化类型主要有黄铜矿化石英闪长岩和含黄铜矿石英脉.围岩主要为钾化石英闪长岩和角岩化的粉砂岩.通过对比区域上的成矿类型，刘家垄脉状铜矿与斑岩型有关，即斜长石和石英为造岩矿物，可见绿泥石、方解石等蚀变矿物.矿化主要发生在夕卡岩化石英闪长岩带.通过总结成矿规律，认为有利的勘探区段在断裂构造发育、岩体与碎屑岩接触部位的岩体一侧.
Abstract:The Liujialong orefield is located on the south of Yinzu pluton in the Southeastern Hubei ore-concentrated region. Exploratory sections and boreholes show that the copper orebodies, mainly S- and SW-trending, are structurally controlled by the Maopu-Liangjianqiao E-W fault zone. The orebodies are mainly concentrated in the contact metasomatism area between quartz diorite and Silurian clastic rocks, hosted inside the pluton. The mineralization is of mainly chalcopyrited quartz diorite and chalcopyrite-bearing quartz vein types, with wall rocks dominated by potassic-altered quartz diorite and hornstone altered siltstone. By comparing the metallogenic types regionally, Liujialong vein copper orebodies are related to porphyry type. That is, plagioclase and quartz serve as rock-forming minerals, with also altered minerals such as chlorite and calcite. The mineralization mainly occurs in the skarnized quartz diorite belt. By summarizing the metallogenic regularity, it is considered that the favorable exploration area is on the pluton side of the contact between pluton and clastic rocks, where fault structures are developed.
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