豫西故县水库环-弧形构造组合的找矿指示作用  

Prospecting Significance of Ring-arc Shaped Structure Combinations from Remote Sensing Images of the Guxian Reservoir,Western Henan Province

作　　者：梁涛 卢仁 王明国 

机构地区：[1]河南省有色金属地质勘查总院,河南郑州450052 [2]河南省有色金属深部找矿勘查技术研究重点实验室,河南郑州450052

出　　处：《地质与勘探》2011年第6期1162-1170,共9页Geology and Exploration

基　　金：河南省国土资源厅科技攻关项目(项目编号2010-61-5);河南省有色金属地质矿产局科研项目(项目编号YSDK2011-10)资助

摘　　要：对豫西故县水库遥感影像进行了解译,获得一系列的环形、弧形及线形构造,它们构成了具有大环(弧)套小环(弧)特征的故县水库环-弧形构造组合。故县水库遥感影像的中心区域为一个较完整的椭圆状环形构造,其北东和南西两侧发育一系列数量不等、规模不对称、近平行、近等间隔的弧形构造。横贯故县水库环-弧形构造北端的近北东东向线性构造与熊耳山北侧山前深大断裂相对应,近北西西向的线性构造切割了故县水库环-弧形构造区的东南隅,持续向东延伸约20km,整体走向与马超营断裂大致相同,6条近南北向的线性构造主要位于故县水库环-弧形构造的中部及西部,对故县水库环-弧形构造具有明显的破坏作用。19个呈椭圆状或近圆状小规模(长轴长度多小于1km)的环状构造位于故县水库环-弧形构造区内,以弧线型和弧间型环状构造为主要类型。在故县水库环-弧形构造区及附近区域内出露12个金、银、铅、锌、钼矿床(化)点,其中以弧间型空间关系矿床(化)点为主,且它们中毫无例外位于小规模环状构造约2km的范围内。在透岩浆流体成矿理论框架下构筑了故县水库环-弧形构造形成的深部过程模型,大环(弧)影像是寨凹隐伏花岗岩岩体-流体系总体上升撞击顶板的产物,相当于岩浆侵位的应力发散区,而小环(弧)则是含矿熔浆-流体流分枝(透岩浆流体)溢出的通道或波及的范围。并认为在故县水库环-弧形构造区内还应出现斑岩型、爆破角砾岩型、接触带型及破碎带蚀变岩型等矿床类型,地表出露的蒿坪沟花岗斑岩和蒿坪沟爆破角砾岩岩体应当具有较大的成矿潜力。此外,故县水库环-弧形构造区的线性构造与环形及弧形构造的交汇部位、弧形构造之间以及弧形构造轨迹弯度最大处或走向改变处和小规模环状构造内部及附近地带都应当给予充分重视。The remote sensing image of the Guxian reservior area in western Henan Province was interpreted. A series of ring-shaped, at＇c-shaped and line-shaped structures were found, which form a combination of ring-arc shaped structure （GXRAS） characterized by big ring-arc structures which encompass small sized ring-arc structures. On the remote image, the central area of the Guxian reservoir is a complete nearly elliptical ring-shaped structure, of which both northeast and southwest sides are a series of arc-shaped structures with different numbers, distinct sizes, which are approximately parallel and have same spacing. The NNE linear structure corresponds to deep range-front fault north of the Xiong＇ er Shan, which transverses the north part of GXRAS. NNW linear structure cut through the south part of GXRAS, and iextends about 20 km toward east, which strikes almost in same direction with the Machaoying fault. Six linear structures occur in the middle and west part of GXRAS which strike nearly in north-south direction, destroying the integrity of GXRAS. Nineteen elliptical or nearly ring-shaped structures, most of which have long axes smaller than l km, are present within GXRAS, dominated by the arc-line type and arc-arc type. There are 12 deposits with minerulization of Au, Ag, Pb, Zn and Mo found in the GXRAS region. Most of them are of the arc-arc mineralization type and fall in smaller sized ring-shaped structures. Based on metalogenic theory on the transmagmatic fluids, the formation model of deep process for the GXRAS was built. Big sized ring-shaped structure is the product of the uplift process of concealed granitic intru- sions named Zhaiwa batholith and the fluid system. Small sized ring-shaped structure is the product of escape channel of melts and fluids with mineralization （Transmagma fluids）. It is suggested that the mineralization type related to porphyry, breccia （ cryptoexplosive breccia） , and alteration rock could be found in the GXRAS. The granitic porphyry and breccia in the Haopingg

关 键 词：故县水库 环-弧形构造 遥感解译 透岩浆流体 熊耳山 崤山 

分 类 号：P627[天文地球—地质矿产勘探] P612[天文地球—地质学]