【作者】 孟宪锋；

【导师】 邓军； 吕文德；

【作者基本信息】 中国地质大学（北京） ， 地质工程， 2007， 硕士

【摘要】 本文在系统论述熊耳山—外方山地区区域地层建造、构造特征及岩浆作用等成矿地质背景的基础上，总结了嵩县南部金成矿地质特征，分析了金成矿控制因素和成矿条件，评价了成矿前景。 详细分析了该区金成矿控制因素，认为金矿的形成和空间分布与熊耳期火山喷发活动、燕山期岩浆活动及马超营断裂带的演化关系密切。区域北西西向和北东向基底断裂构造不仅控制了火山盆地和火山机构的形成和分布，而且控制了燕山期岩浆活动的发生、发展及岩体的分布，从而控制了区域金异常的分布及金矿床(点)的分布；金矿床的形成和分布受熊耳群古火山机构及其旁侧断裂构造蚀变带的联合控制，大致呈环带状分布于火山口外围；受矿床产出构造位置及成矿机理差异的制约，区内金矿床类型可分为构造蚀变岩型、爆发角砾岩型及石英脉型三种，尤其是构造蚀变岩型金矿分布广，规模大。金矿体的产状和空间分布则受构造蚀变带内局部应力作用下形成的剪裂带阵列的控制，总体上符合里德尔剪切实验规律，建立了金矿构造控矿模式，分析了矿体产出的总体规律。探讨了金成矿物质来源及物理化学环境，通过对硫、铅及氢氧同位素资料分析，认为金成矿物质主要来源于上地幔，同时在含矿流体运移过程中有少部分地壳物质的加入；成矿流体总体上是在偏酸性的环境中形成和运移的，但在成矿的中—晚期阶段一度存在偏碱性环境；成矿流体的温度101.2～318.6℃，平均232℃，属于中—低温环境。研究区金矿的形成是长时间、多期次、多阶段构造—岩浆热流体作用的结果，具有多期次叠加的特点，最终成矿时间为燕山晚期。 对研究区地层建造、构造特征和地球化学异常等成矿条件进行分析，并与已知金矿区类比，认为研究区成矿条件优越，找矿前景广阔，指出环形构造东、南侧化探异常区是进一步找矿的重点靶区。更多还原

【Abstract】 Based on the systematically stated of Ore-forming geological base such as layer-construction,tectonic property,magmaism and geological characteristics of typical gold d eposits in Xongershan-Waifangshan area,The paper summerised Ore-forming geological properties of goiddeposits, analysised Ore-forming controing act and conditions of gold deposits in southern of Songxian,further more the future-pictuer had been appraisement ed.Detailed analysis of Ore-forming and Ore-controlling factors of gold deposits in t his area,Result that in the region Ore-forming and Spreading inthe space of gold dep osits not only closly relate with volcanic process in the Xonger Age and magmatic pr ocess in the YANSHAN Age,but also with the evolution of MACHAOYING fault. Th e NWW and NE regional deep faults controlingnot only the forming and spreading of volcanic-basin and volcanics,but also the occurrence,developing and spreading of magm atic process in the YANSHAN Age,and thus controling the spreading of regional gold-abnormal or gold deposits(points). Ore-forming and Spreading of gold deposits is unite -controlled by Xonger Blok volcanic-tectonic and metmorpic belt in fault beside it,usua lly as ring-belt distributed outside around with it.As a result of controled by diffence from it position in fault and ore-forming process,the gold deposits can be devided into three types:metamorphic tectonite, explosion breccia and quartz vein. What is more,th e former spreading wide, magnitude huge. The attitude and spreading in the space of ore-body controlled by array from which stressproess occus,and that harmonize with R iedel experiment law,stand this the ore-forming model by tectonic of gold deposit is s etup, dpend on this a law of ore-body spreading is determinated. Where the matterco mes from and how did the physical-chemical environment was has been discussedsimp ly.Stand by analysis of sulfur,lead and hydrogen-oxigen isotop information,mainly it is comes from upper mantle,partly from crust, the formingand moving of the Au-bearing liquid generaly in acid,but in alkali at middle-latter stage, and it temperature about 10 1.2-318.6℃, at aevrage 232℃, belongs middle-lower temperature environment.It is th e creation that ore-forming of gold of hot fluidal process from tectonic-magmatism in long time,more period and more stage,it has properties of stromatolithic more times,and ended at YANSHAN Age.Based on Ore-forming geological conditions analysis of layer-construction,geotecton ic properties and its geochemical information,compared with thewellknown area of gold deposit,the author point out that the studed-area have upper ore-forming geological con ditions and large prospective for prospecting, the area where has geochemical informati on and outside the eastern and southeastern of circumtectonic line are the key target districts in deeply ore-prospecting.更多还原