锡矿山锑矿成矿模式与找矿

Metallogenic Model and Prospecting of Xikuangshan Antimony Deposit

锡矿山锑矿以储量富、锑质优、产量多被誉为“世界锑都”,是中国锑工业的发源地,我国锑业的龙头。矿田为一轴向北30°东,向南北两端倾伏的断褶隆起,其西翼为F75断裂,东翼有煌斑岩脉和北东向断裂产出。矿床属低温热液型,成矿受构造、地层、岩相联合控制,推测深部有隐伏岩体存在。浅部为“背斜加一刀”的成矿模式,深部褶皱消失,表现为断裂与含矿层共同控矿。近年勘查有较大找矿进展,发现查明了北部稻草湾锑矿床,矿田内多个勘查钻孔揭示,佘田桥组龙口冲砂质页岩的底部与棋子桥组灰岩接触部位似层状锑矿体,开拓了矿田深部找矿新的空间。预测锡矿山北部的白云岩背斜、芦茅塘背斜及煌斑岩脉以东地段具有大的找矿突破潜力。

Xikuangshan Antimony Mine is known as the“World Antimony Capital”for its rich reserves,high-quality antimony,and high output.It is the birthplace of China s antimony industry and the leader of China s antimony industry.The ore field is a fault fold uplift with an axial direction of 30°east to the north and plunging towards both ends of the north and south.Its west wing is the F 75 fault,and its east wing is dominated by lamprophyre veins and NE trending faults.The deposit belongs to a low-temperature hydrothermal type,and its mineralization is jointly controlled by structure,strata,and lithofacies.It is speculated that there are concealed rock masses in the deep.The shallow part is a“anticline plus a knife”metallogenic model,and the deep folds disappear,showing the joint ore controled by faults and ore bearing beds.In recent years,significant exploration progress has been made,and the Daocaowan antimony deposit in the north has been discovered.Several exploration boreholes in the ore field have revealed that the bottom of the Longkouchou sandy shale of the Shetianqiao Formation and the contact area of the Qiziqiao Formation limestone are similar to layered antimony ore bodies,opening up a new space for deep ore prospecting in the ore field.It is predicted that the dolomite anticline,the Lumaotang anticline,and the section east of the lamprophyre vein in the north of Xikuangshan have great prospecting breakthrough potential.