【作者】 王晓地；

【导师】 孙传敏； 何政； 陶专；

【作者基本信息】 成都理工学院 ， 矿物、岩石、矿床学， 2001， 硕士

【摘要】 本文在充分收集前人研究成果，结合本人的野外实际工作，综合分析了新疆伊犁地区的下石炭统大哈拉军山组火山岩岩石特征、含矿性；系统研究了火山岩中存在的以金、铜为主的矿床特征；进一步总结出金、铜成矿规律。 通过研究，发现新疆伊犁地区的下石炭统大哈拉军山组火山岩主要分布在伊犁盆地以北的博罗克努山一带，与伊犁中部的伊什基里克—察布察尔山一带，以及那拉提山北缘。是该区重要而且比较有优势的含矿层位之一。 博罗科努山以南的图拉苏火山盆地中的哈拉军山组火山岩，火山活动强烈，岩相变化较大，为陆相环境下喷出的。岩石类型以中酸性和酸性为主，其次为中基性和基性，且常以熔岩和火山碎屑岩产出，有时夹有火山碎屑沉积岩。伊犁盆地中哈拉军山组火山岩在各地变化复杂，成分各异。火山活动强烈，爆发作用较强烈，为海陆交互的喷发环境产生。岩性总体以中酸性喷发岩为主，基性岩次之。底部以少量正常沉积碎屑岩特征，中部以火山碎屑岩为主，上部则以熔岩为岩石组合的最大特征。 伊犁盆地大哈拉军山组火山岩是裂谷环境形成；博罗科努一带的大哈拉军山组火山岩是松弛拉张的古陆边缘环境形成；总体是拉张环境的产物。 大哈拉军山组火山岩普遍富含Au、Cu、Pb、Zn、Ag、As、Sb、Mg等亲硫成矿元素，各元素的变异系数在其中高达0.58—2.19，属分异～强分异型分布，具典型的矿源层特征。是寻找金、铜矿产资源最有利的层位之一。 吐拉苏火山盆地之中的下石炭统大哈拉军山组火山岩中与金矿成矿密切相关；伊犁盆地大哈拉军山火山岩中从成矿条件来说，南部那拉提山北缘一带有利于成矿，Cu应当是南部最有希望的成矿元素。 金矿主要集中吐拉苏火山盆地之中，为浅成低温热液型，按成矿地质构造条件和成矿特征以及矿物共生组合等，又分为冰长石—绢云母型和硅化岩型。成矿时代为华力西中期，成矿物质来源是大哈拉军山组酸性凝灰岩段（C₁d²），它是该区不同类型金矿成矿的主要矿源层。金矿受火山机构的严格控制，在火山活动中心附近的断裂系内形成冰长石—绢云母型金矿；远离火山活动中心的构造薄弱带内形成硅化岩型金矿。冰长石—绢云母型与金矿化有关的岩石为钙碱系列（部分为碱性系列）的中酸性火山岩、英安质角砾熔岩和石英角闪安山玢岩，围岩蚀变主要为硅化、高岭土化、黄铁矿化、绢云母化和冰长石化；硅化岩型与大哈拉军山组酸性凝灰岩段沉凝灰角砾岩、火山角砾岩密切相关，围岩蚀变以硅化为主、黄铁矿化、毒砂化。冰长石—绢云母型金矿地球化学标志以：Au、Ag、As、Sb、Te、Se等低温元素组合异常区；硅化岩型金矿地球化学标志以：Au、Ag、Hg、Sb、Se、Bi等元素富含时是矿化体赋存的重要标志。 铜矿分布主要分布于伊犁盆地中，并且大多数都集中在察布察而山—伊什基里克山—带及那拉提山北，主要类型以火山热液型为主，少数为矽卡岩型，成矿时代为华力西中期与火山热液型铜矿有关的为下石炭统大哈拉军山组火山碎屑岩、火山岩为容矿岩石。构造破碎蚀变岩，北东东一近东西向断裂带控制着铜矿的分布、低级别的韧性断裂带为容矿构造，华力西中期钾长花岗岩是形成铜矿床的能量来源，围岩蚀变以硅化、黄铁矿化、绿泥石化、绢云母化、碳酸盐化。更多还原

【Abstract】 Volcanic rock mineral-bearing features of Lower CarboniferousDarhalange mountain formation in Xijiang YLi area and gold.copper ore deposit’s mineralization ruIeAbstact In this paper,the author collects adequately former researchfu1 fruit to ana1ysesyntheticalIy volcanic rock features and mineral-bearing quality of Lower CarboniferousDarhalange mountain formation in Xijiang area with the field operation of the authorDepositcharacter that Au. Cu are main in volcanic rock is systemically researched.FinaIly mineraIizationru1e of Au and Cu is summarized.Through investigation, the author finds vo1canic rock of Lower Carboniferous Darha1angemountain formation in Xijiang Yili area distributes in Berlukener Mountain north to Yili Basin.Yshengilic-Charbucher Mountain in the middle of Yi1i and at the edge of Nalarty Mountain.It isone of important and advantageous producing formations in this area.VOlcanic rock of Darhalange seriers in Tulas VOIcanic Basin south to Berlukerner Mountainwhich erupts in continental facies environment has drastic volcanic activity and it’s rock facieschange greatly.Intermidiate acidity rock and acidity rock are main,and basic rock and intermidiatebasic rock are secondary It appears in the form of lava and effiata,somCtimes havingvolcaniclastic sedimentary rock. Volcanic rock of Darhalange fOrmation in the middle of Yiliwhich erupts in ocean and continental environment varies complicatedly and has differentcomposition. in different areas.which erupts in ocean and continental environment Intermidiateacidity rock is main,and basic rock is secondary. At the bottom is smalI normal holoclasticrock,efflata is in the middle,and at the top is lava.VOlcanic rock of Darhalange fOrmation in Yili basin forms in rift enviroment. Volcanic rockof DarhaIange seriers in Berlukerner Mountain fOrms in s1ack rift ancient continenta1 marginenvironment.In the main al1 are outcome in rift environment.VoIcanic rock of Darhalange seriers abounds with Au. Cu. Pb. Zn. Ag. As. Sb. Mg etcwhich are sulfophile mineralization elements.Every element variation coefficient changesbetween 0.58 and 2. l9 be1ong to differential and strong differentiaI distribution which is typicalcharacter of mineral resource layer.lt is the most advantageous formation searching Au. Cumineral resource.Volcanic rock of Lower Carboniferous DarhaIange mountain formation in Tusuler Basinrelates c1oseIy with gold mineralization.As volcanic rock of DarhaIange seriers in Yiili Basin asis concerned,mineraIization is easy in the south Nalarty Mountain north edge,and Cu shouId bethe most possible mineraIization eIement.Gold mines concentrating most1y in the Tularsu vo1canic basin are supergeneepithermal,which are also divided into adularia-sericite and silicified rock according togeological mineralization stucture condition mineralization features and mineral accretion combination.Mineralization epoch is Variscan metaphase. Mineralization substances s origin is Cd2 which is main mineral resource layer of inhomogeneous gold mine mineralization in this area.Gold mine is controlled strictly by volcanic framework.Adularia-sericite gold mine is formed in the rifling near to vocanic activity center,but silicified rock gold mine is formed in the weak framework strip far to vocanic activity center. Adularia-sericite type relating with gold mineralization is calc-alkaline formation (partly alkaline formation) intermediate acidity volcanic rocks dacitic breccia lava and quartz hungarite porphyrite.Wall rock erosion is mainly silicification.. kaolinization.. pyritization. adularization and sericitization. silicified rock type relates with deposit breccia.. volcanic breccia of Cd2. Wall rock erosion is mainly silicification.. sericitization and arsenopyritization. Adularia-sericite gold mine is geochemical sign is the abnormal section of Au.. Ag.. As.. Sb.. Te.. Se etc low-temperature element combination;silicified rock gold mine geochemical sign is the enrichment of更多还原