甘肃北山公婆泉铜矿矿集区成矿构造剖析及成矿预测

Metallotectonic Anatomy and Metallogenic Prognosis for Ore-concentrated Area of Gongpoquan Copper Deposit from Beishan Area of Gansu Province

甘肃肃北县公婆泉铜矿是北山成矿带一个中型斑岩铜矿床,作者运用矿田构造分析思路,综合利用重力、遥感、矿床勘查及同位素测年资料,研究了控制该矿带?矿田?矿体的不同级次构造的空间展布及形成演化,厘定出4级成矿构造:斜切弧的北西向深大断裂控制了公婆泉铜矿、勒巴泉铜矿、红柳沟铜矿、419铜矿等构成的矿集区的展布,公婆泉铜矿田?各矿区?各矿段的分布分别受控于代表岩基?岩浆柱或浅部岩浆房?热液通道的一、二、三级环形组构,各个热液通道内的矿体至少呈深浅两层矿体群出现。类似的环形构造FV1?10及外围是公婆泉铜矿田重要的找矿靶区。

Gongpoquan Copper deposit is a medium-sized porphyry copper deposit in Beishan metallogenic belt in Subei town of Gansu province. Ac- cording to mine field structure analysis, the author uses gravity, remote sense, deposit exploring and dating by isotope to research the spatial distribution characteristics and formation and evolution of the different class structures controlling the fahlband-mine concession-orebody, respectively. The author al- so clarifies 4 levers of metallotectonic ： the NW deep-large scale fault of cutting across the arc controlling the spread of Gongpoquan, Lebaquan, Hongli- ugou, 419 Copper deposits concentrated area, the distribution to Gongpoquan Copper field-mining areas-ore blocks are controlling by the Ⅰ , Ⅱ, Ⅲ an- nular volcano framcs delegated bathelith-maganatic column or surface magma chamber-hydrotherm channel, and the orebodies in channels appear as dark -shallow two ore cluster at least. The similar annular volcano frames FV1-10, also its surrounding are important targets for ore-prospecting in Gongpo- quan concession area.