陕西双王金矿床西段成矿特征及成因探讨

Discussion on metallogenic characteristics and genesis of the western section of Shuangwang Gold Deposit,Shaanxi Province

陕西双王金矿床位于凤-太泥盆纪热水沉积盆地的东部,是凤太矿集区内最典型的角砾岩型金矿床,目前累计探明储量已超过70t。矿区以西大梁为界,分为东西两段,由大小不等的五个角砾岩体组成,其中西段分布Ⅰ、Ⅱ号角砾岩体,目前已在Ⅱ号角砾岩体中圈出了KT2及KT6两条金矿体,并在Ⅱ号角砾岩体北部钠长板岩中圈出了KT6-1矿体。通过对双王金矿床西段的详细研究发现,矿床成因类型为(混合)热液型金矿床,其形成是内外因素在时空四维条件下耦合作用的结果,这些因素在空间组合和时间演化的耦合的程度越好,则越有利于金矿床的形成。

Shuangwang gold deposit occurs in the east part of the Feng-Tai Devonian hydrothermal sedimentary basin in the West Qinling Mountains,which is the most typical breccia type gold deposit with proven reserves over 70 tons of gold in the Feng-Tai ore concentration area.The mining area of the deposit is divided by Xidaliang into the east and the west sections,containing five breccia bodies with different sizes.In the west section two breccia bodies I and II are exist and two gold mineralized zones KT2 and KT6 are discovered in the body II.One ore body KT6-1 is delineated in albite slate at the north part of the breccia body II.detailed study of the western section of Shuangwang gold deposit indicated that the genetic type of the deposit is(mixed)hydrothermal gold deposit formed by coupling actions of internal and external factors under the four dimensional space-time conditions.The better the coupling of these factors in spatial combination and temporal evolution,the more favorable the gold deposit formation.