甘肃省肃南县红石拉排铁多金属矿地质特征

Geological Characteristics of Iron Polymetallic Deposit in Hongshilapai of Gansu Province Sunan County

勘查区地处北祁连山加里东期造山带与中祁连地块两大构造单元的交汇部位荒田地-野马大滩裂谷带北西侧,地层的展布明显受所处构造单元的控制。区域内主要出露地层有:前长城系北大河岩群、长城系朱龙关群、寒武纪上统香毛山群、奥陶系、石炭系、白垩系下统新民堡群、第四系等。前长城系北大河群是红石拉排铁多金属矿的含矿层位。红石拉排铁多金属矿为沉积-变质型铁矿,赋矿地层为前长城系北大河群,控矿构造为北西向红石拉排-七大坂断裂。区内目前已发现了铁矿体3条,铁矿化体1条,矽卡岩型钨铜矿化体1条,找矿前景良好,具有进一步开展地质工作的价值。

The exploration area is located at the intersection of the Caledonian orogenic belt in the north Qilian Mountains and the Central Qilian Block. The northwest side of the barren land-Yema Datan rift belt is obviously controlled by the tectonic units in which the strata are distributed. The main outcropping strata in the area are: the Beidahe Group of the Pre-Great Wall System, the Zhulongguan Group of the Great Wall System, the Xiangmaoshan Group of the Upper Cambrian, the Ordovician, the Carboniferous, the Xinminbao Group of the Lower Cretaceous and the Quaternary. The Beida River group of the former the Great Wall is the ore bearing horizon of Hongshilapai iron polymetallic deposit.The Hongshilapai polymetallic ore deposit is a sedimentary-metamorphic iron deposit, hosted by the Beidahe Group of the Pre-Great Wall System, and controlled by the NW-trending Hongshilapai-Qidaban fault. Three iron ore bodies, one iron ore body and one skarn type W-Cu ore body have been found in the area. The prospecting prospect is good and it is of value for further geological work.