本文選題：小秦嶺西段　切入點(diǎn)：鐮子溝　出處：《長安大學(xué)》2015年碩士論文

【摘要】：工作區(qū)位于華北地臺(tái)南緣豫西斷隆之小秦嶺金礦帶西段。出露地層主要為太古界太華群秦倉溝組和南部中元古界高山河組,高山河組呈角度不整合覆蓋于秦倉溝組之上。工作區(qū)位于大月坪-金羅斑復(fù)背斜南翼,呈單斜構(gòu)造。太華群秦倉溝組片麻理走向北西,傾向北北東-北東,中等-較陡傾角,南部高山河組地層傾向南東,中等-較緩傾斜。斷裂構(gòu)造發(fā)育,以北東-北北東向斷裂為主。鐮子溝金礦床礦體均賦存于該組斷裂帶中。區(qū)內(nèi)未見巖漿巖出露,脈巖較發(fā)育,主要有輝綠巖、正長斑巖、鉀長偉晶巖等。工作區(qū)內(nèi)圈出礦化蝕變帶9條,其產(chǎn)狀與北東-北北東向斷裂構(gòu)造基本一致,空間上呈大致平行展布。礦化蝕變帶中均有金礦體存在。通過地質(zhì)勘查,圈定7個(gè)工業(yè)礦體,即Ⅲ-1、Ⅱ-2、Ⅱ-1、Ⅴ、Ⅳ、Ⅵ、Ⅺ號(hào)礦體,其中Ⅲ-1、Ⅱ-2號(hào)礦體具有較大規(guī)模,是礦床主要工業(yè)礦體。礦體形態(tài)較簡單,多為脈狀、似脈狀、透鏡狀。規(guī)模大小不等,長度55m-550m,厚度1.4m-1.6m,礦體品位1.6 g/t-2.8g/t。圍巖蝕變以硅化、絹英巖化、黃鐵礦化、方鉛礦化、鉀化、碳酸鹽化、綠泥石化為主。礦石中貴金屬礦物為自然金,其次為黃鐵礦,方鉛礦,再次為碲鉛礦和黝銅礦,脈石礦物主要為石英,其次是鉀長石和方解石。金主要以粒間金、裂隙金和包裹金的形式存在。礦石結(jié)構(gòu)以粒狀結(jié)構(gòu)、壓碎結(jié)構(gòu)為主。礦石構(gòu)造主要為碎裂狀、塊狀、浸染狀構(gòu)造。礦石自然類型主要為蝕變巖型、石英脈型。
[Abstract]:The working area is located in the west section of the Xiaoqinling gold belt in the west of Henan Province on the southern margin of the North China platform.The outcropping strata are mainly the Qinchanggou formation of Taihua Group in the Archaean and the Gaoshanhe formation of the Middle Proterozoic in the south, and the Gaoshanhe formation covers the Qinchanggou formation at an angle unconformity.The working area is located in the south wing of the Dayue Ping-Jinluoban complex anticline, with monoclinic structure.Fault structure developed, NNE-NNE trending fault dominated.The orebodies of the Xiucigou gold deposit occur in the fault zone.Magmatic rocks are not exposed and dikes are relatively developed in the area, mainly diabase, syenite porphyry, kalium feldspar and so on.There are 9 mineralization alteration zones in the working area, which are consistent with the NNE-NNE fault structure and are distributed in parallel in space.Gold ore bodies exist in all mineralization alteration zones.Through geological exploration, seven industrial orebodies, i.e. 鈪，

本文編號(hào)：1710020