本文主要研究内容
作者吾克依拉吾铁朴(2019)在《吉林省夹皮沟成矿区金矿多元信息成矿预测》一文中研究指出:夹皮沟成矿区位于吉林省桦甸市境内,是滨太平洋成矿带内重要的金矿集区之一。大地构造位置位于华北克拉通北缘东段与中亚造山带东段之间的北西向拼贴带内,夹皮沟-大石砬子NW向构造带控制金矿带内金矿床、矿(化)点的分布。区内目前已发现二道沟、小北沟、八家子、三道岔、四道岔、下戏台和板庙子等一批大中小型矿床和数几十余处矿(化)点。伴随矿山开采对已探明资源储量的不断消耗,找寻接替资源任务紧迫,同时由于前人对矿床成因、成矿控制因素、主要预测要素(标志)、成矿富集规律等方面的认识存在较大争议,制约找矿工作的顺利开展。为缓解中国黄金集团夹皮沟矿业有限责任公司的资源危机,中金集团设立了“夹皮沟金成矿区多元信息找矿预测”科研项目。作者依托该项目研究,以勘查区找矿预测理论和综合信息矿产预测理论为指导,在系统收集、分析和整理前人研究成果的基础上,以典型矿床(二道沟金矿、小北沟金矿和八家子金矿等)地质地球化学特征、矿床成因研究为基础,系统分析了夹皮沟成矿区的成矿地质条件与控矿因素(成矿要素),总结成矿规律;根据野外观察结合对已有航磁、重力、化探数据以及本项目实施的高磁、土壤测量成果的综合信息解译,确定金矿的预测要素;最后,以基于GIS平台的区域矿产资源综合信息评价系统(MRAS)为基础,以证据权法为手段,提取夹皮沟金成矿区的地质(地层岩性、构造及岩浆岩)、矿产(矿床、矿点及矿化点)等成矿信息及重力、航磁、化探等预测信息(标志),对区域金矿找矿潜力进行评价,圈出找矿靶区,并对各找矿靶区潜在资源量进行估算,为矿山企业开展后续勘查工作提供选区及科学依据。论文研究取得如下成果:1.以典型矿床研究为手段,总结了夹皮沟成矿区金矿的地质特征及成因,建立成矿模式。研究认为夹皮沟金矿区的金矿化以含金石英脉型为主,其次是蚀变岩型,赋矿围岩均为夹皮沟群三道沟组,岩性以花岗片麻岩和斜长角闪岩为特征,矿体严格受北西向夹皮沟断裂及其低序次北西向、北东向断裂构造综合控制,与中生代花岗质岩浆活动关系密切。成矿作用划分为热液成矿期及次生氧化期,其中热液期包括石英(I)、石英-黄铁矿(II)、金矿化-石英-多金属硫化物(III)和晚期石英-方解石(IV)等四个矿化蚀变阶段。流体包裹体及氢-氧同位素研究表明,区内金矿的成矿流体属于中温、中低盐度共存的NaCl-H2O-CO2不混溶体系,主要来源于具有幔源流体特征的岩浆水,成矿晚阶段演化为成分相对简单的均一NaCl-H2O体系;矿石硫同位素组成显示区内金矿床成矿物质具有壳-幔混合来源的特征,以深源为主,成矿流体上升运移过程中从围岩中萃取了少量成矿物质。对成矿有关岩浆岩LA-ICP-MS锆石U-Pb年代学研究显示,该区至少存在252Ma和230 Ma213 Ma两期岩浆作用。结合矿体与岩浆岩体(脉)的依存关系,提出夹皮沟成矿区金的成矿作用从晚三叠世一直延续到中侏罗世早期,从早到晚可划分为两个成矿期次,分别对应于区域上的两期构造-岩浆事件:印支晚期(240210Ma)和燕山早期金成矿作用(180160 Ma)。综上所处,确定夹皮沟金矿床为中温岩浆热液矿床。结合区域构造演化特征,认为成矿作用形成于华北克拉通北缘与中亚造山带东缘挤压向伸展过渡的构造环境中。2.研究确定了夹皮沟成矿区金矿成矿的地质条件及控矿因素,总结了区域金矿成矿要素。夹皮沟成矿区的金矿床受夹皮沟北西向构造带控制,根据地质、地球物理解译结果,提出夹皮沟北西带西侧存在TTG岩浆穹窿,夹皮沟北西带早期为TTG穹窿与夹皮沟群地层接触带,晚古生代-中生代继承性发展为区域性北西向韧脆性断裂带,控制区内金矿床总体北西向带状分布;夹皮沟北西带的低序次北西向、北东向构造控制矿床矿体的空间分布,构成构造控矿要素;太古界夹皮沟群三道沟岩组中的斜长角闪岩、角闪斜长片麻岩在空间上为金矿矿体的主要容矿岩石,其金等成矿元素含量及变异系数、浓集系数特征表明其为金矿成矿提供物质来源,构成金矿成矿地层岩性要素;印支期、燕山早期区域花岗质岩浆活动,在时间、空间、热液来源、成矿物质来源、成矿动力学特征方面控制矿体的产出及分布,构成成矿岩浆岩条件。夹皮沟成矿区金矿的形成是上述构造、地层岩性、岩浆作用条件综合作用的产物。根据地质及航磁、重力综合信息解译结果,确定了夹皮沟成矿区的成矿地质体、成矿结构面及控矿构造类型及特征,为后续找矿潜力评价奠定基础。3.根据野外观察,结合地质、航磁、重力、化探综合信息解译,确定了夹皮沟金成矿区的金矿预测要素。对已知矿床研究确定成矿有关的硅化、黄铁矿化、钾化、绢英岩化、黄铁绢英岩化和绿泥石化、绿帘石化、碳酸盐化为金矿预测的地质标志;夹皮沟北西向构造及其派生的低序次北西向、北东向断裂构造以及成矿有关脉岩集中发育地段也是金矿成矿预测的地质标志。对区域化探数据解译结果表明,夹皮沟成矿区内Au、Ag、Zn、Mo、Sb、Hg、Pb、Cu等为主要成矿元素(变异系数),且Au、Ag、Pb、Zn、As、U、Mo等元素表现出一个主成矿期(阶段),Cu、Bi、W、Sb、Hg、Sn、Th等元素表现出两个或以上成矿期(阶段);成矿元素划分为Ag-Cu-Pb-Zn、Co-Ni-Ti-V、Au-Bi-W、F-Mo-Th、As-B-Sb、Mn-Sn和Hg-U等元素组合,表明区内成矿元素具有多来源、多阶段叠加富集特征,确定Au、Bi、W、Ag、Pb、Zn、Cu、Sb、Mn等元素异常及Au-Bi-W、Ag-Cu-Pb-Zn组合异常(元素组合因子得分值的异常区)为金矿找矿的地球化学标志。对区域航磁、重力数据进行化极、延拓、解析,根据不同上延高度不同方向水一阶导数轴值(极大值或极小值)反映物性变化界面,不同上延高度垂向二阶导数0等值线反映不同物性地质体边界特征,提取了航磁、重力的线性构造信息和环形构造信息,根据金矿床矿体与重磁解译线性构造、环形构造的空间依存关系,确定重磁解译北西向构造、北东向构造(物性界面)及其交汇部位,北西向构造与环形构造的交汇部位控制矿床矿体空间分布,确定其为金矿找矿的地球物理标志。4.根据夹皮沟成矿区金矿床、矿点的分布特征及其与控矿地层岩性、构造、岩浆岩及重磁解译线性构造、环形构造关系,总结了区域金矿成矿规律。提出区内金矿床(点)在空间分布上具有明显的不均匀矿化与集中分布、等间距规律,这主要受夹皮沟群地层岩性、北西向或北东向构造、太古代TTG分布以及中生代花岗岩分布综合控制;夹皮沟成矿区金矿床(点)多产于北西向与北东向线构造交汇复合部位、环形构造(或成矿地质体)产状变化部位、环形构造与线构造交汇地段;金矿成矿作用集中发生于印支燕山早期。5.以基于GIS平台的区域矿产资源综合信息评价系统(MRAS)为基础,以证据权法为模型,提取夹皮沟金成矿区的地质(地层岩性、构造及岩浆岩)、矿产(矿床、矿点及矿化点)等成矿信息及重力、航磁、化探等预测信息(标志),开展1:5万金矿综合信息成矿预测研究,共圈定A级成矿预测区5处,B级成矿预测区8处,C级成矿预测区11处,并利用数量化理论Ⅰ模型对各成矿预测区进行资源量估算,获得金矿预测资源量总计348t,为研究区开展后续金矿勘查提供选区及科学依据。
Abstract
ga pi gou cheng kuang ou wei yu ji lin sheng hua dian shi jing nei ,shi bin tai ping xiang cheng kuang dai nei chong yao de jin kuang ji ou zhi yi 。da de gou zao wei zhi wei yu hua bei ke la tong bei yuan dong duan yu zhong ya zao shan dai dong duan zhi jian de bei xi xiang pin tie dai nei ,ga pi gou -da dan la zi NWxiang gou zao dai kong zhi jin kuang dai nei jin kuang chuang 、kuang (hua )dian de fen bu 。ou nei mu qian yi fa xian er dao gou 、xiao bei gou 、ba jia zi 、san dao cha 、si dao cha 、xia hu tai he ban miao zi deng yi pi da zhong xiao xing kuang chuang he shu ji shi yu chu kuang (hua )dian 。ban sui kuang shan kai cai dui yi tan ming zi yuan chu liang de bu duan xiao hao ,zhao xun jie ti zi yuan ren wu jin pai ,tong shi you yu qian ren dui kuang chuang cheng yin 、cheng kuang kong zhi yin su 、zhu yao yu ce yao su (biao zhi )、cheng kuang fu ji gui lv deng fang mian de ren shi cun zai jiao da zheng yi ,zhi yao zhao kuang gong zuo de shun li kai zhan 。wei huan jie zhong guo huang jin ji tuan ga pi gou kuang ye you xian ze ren gong si de zi yuan wei ji ,zhong jin ji tuan she li le “ga pi gou jin cheng kuang ou duo yuan xin xi zhao kuang yu ce ”ke yan xiang mu 。zuo zhe yi tuo gai xiang mu yan jiu ,yi kan cha ou zhao kuang yu ce li lun he zeng ge xin xi kuang chan yu ce li lun wei zhi dao ,zai ji tong shou ji 、fen xi he zheng li qian ren yan jiu cheng guo de ji chu shang ,yi dian xing kuang chuang (er dao gou jin kuang 、xiao bei gou jin kuang he ba jia zi jin kuang deng )de zhi de qiu hua xue te zheng 、kuang chuang cheng yin yan jiu wei ji chu ,ji tong fen xi le ga pi gou cheng kuang ou de cheng kuang de zhi tiao jian yu kong kuang yin su (cheng kuang yao su ),zong jie cheng kuang gui lv ;gen ju ye wai guan cha jie ge dui yi you hang ci 、chong li 、hua tan shu ju yi ji ben xiang mu shi shi de gao ci 、tu rang ce liang cheng guo de zeng ge xin xi jie yi ,que ding jin kuang de yu ce yao su ;zui hou ,yi ji yu GISping tai de ou yu kuang chan zi yuan zeng ge xin xi ping jia ji tong (MRAS)wei ji chu ,yi zheng ju quan fa wei shou duan ,di qu ga pi gou jin cheng kuang ou de de zhi (de ceng yan xing 、gou zao ji yan jiang yan )、kuang chan (kuang chuang 、kuang dian ji kuang hua dian )deng cheng kuang xin xi ji chong li 、hang ci 、hua tan deng yu ce xin xi (biao zhi ),dui ou yu jin kuang zhao kuang qian li jin hang ping jia ,juan chu zhao kuang ba ou ,bing dui ge zhao kuang ba ou qian zai zi yuan liang jin hang gu suan ,wei kuang shan qi ye kai zhan hou xu kan cha gong zuo di gong shua ou ji ke xue yi ju 。lun wen yan jiu qu de ru xia cheng guo :1.yi dian xing kuang chuang yan jiu wei shou duan ,zong jie le ga pi gou cheng kuang ou jin kuang de de zhi te zheng ji cheng yin ,jian li cheng kuang mo shi 。yan jiu ren wei ga pi gou jin kuang ou de jin kuang hua yi han jin dan ying mai xing wei zhu ,ji ci shi shi bian yan xing ,fu kuang wei yan jun wei ga pi gou qun san dao gou zu ,yan xing yi hua gang pian ma yan he xie chang jiao shan yan wei te zheng ,kuang ti yan ge shou bei xi xiang ga pi gou duan lie ji ji di xu ci bei xi xiang 、bei dong xiang duan lie gou zao zeng ge kong zhi ,yu zhong sheng dai hua gang zhi yan jiang huo dong guan ji mi qie 。cheng kuang zuo yong hua fen wei re ye cheng kuang ji ji ci sheng yang hua ji ,ji zhong re ye ji bao gua dan ying (I)、dan ying -huang tie kuang (II)、jin kuang hua -dan ying -duo jin shu liu hua wu (III)he wan ji dan ying -fang jie dan (IV)deng si ge kuang hua shi bian jie duan 。liu ti bao guo ti ji qing -yang tong wei su yan jiu biao ming ,ou nei jin kuang de cheng kuang liu ti shu yu zhong wen 、zhong di yan du gong cun de NaCl-H2O-CO2bu hun rong ti ji ,zhu yao lai yuan yu ju you man yuan liu ti te zheng de yan jiang shui ,cheng kuang wan jie duan yan hua wei cheng fen xiang dui jian chan de jun yi NaCl-H2Oti ji ;kuang dan liu tong wei su zu cheng xian shi ou nei jin kuang chuang cheng kuang wu zhi ju you ke -man hun ge lai yuan de te zheng ,yi shen yuan wei zhu ,cheng kuang liu ti shang sheng yun yi guo cheng zhong cong wei yan zhong cui qu le shao liang cheng kuang wu zhi 。dui cheng kuang you guan yan jiang yan LA-ICP-MSgao dan U-Pbnian dai xue yan jiu xian shi ,gai ou zhi shao cun zai 252Mahe 230 Ma213 Maliang ji yan jiang zuo yong 。jie ge kuang ti yu yan jiang yan ti (mai )de yi cun guan ji ,di chu ga pi gou cheng kuang ou jin de cheng kuang zuo yong cong wan san die shi yi zhi yan xu dao zhong zhu luo shi zao ji ,cong zao dao wan ke hua fen wei liang ge cheng kuang ji ci ,fen bie dui ying yu ou yu shang de liang ji gou zao -yan jiang shi jian :yin zhi wan ji (240210Ma)he yan shan zao ji jin cheng kuang zuo yong (180160 Ma)。zeng shang suo chu ,que ding ga pi gou jin kuang chuang wei zhong wen yan jiang re ye kuang chuang 。jie ge ou yu gou zao yan hua te zheng ,ren wei cheng kuang zuo yong xing cheng yu hua bei ke la tong bei yuan yu zhong ya zao shan dai dong yuan ji ya xiang shen zhan guo du de gou zao huan jing zhong 。2.yan jiu que ding le ga pi gou cheng kuang ou jin kuang cheng kuang de de zhi tiao jian ji kong kuang yin su ,zong jie le ou yu jin kuang cheng kuang yao su 。ga pi gou cheng kuang ou de jin kuang chuang shou ga pi gou bei xi xiang gou zao dai kong zhi ,gen ju de zhi 、de qiu wu li jie yi jie guo ,di chu ga pi gou bei xi dai xi ce cun zai TTGyan jiang qiong long ,ga pi gou bei xi dai zao ji wei TTGqiong long yu ga pi gou qun de ceng jie chu dai ,wan gu sheng dai -zhong sheng dai ji cheng xing fa zhan wei ou yu xing bei xi xiang ren cui xing duan lie dai ,kong zhi ou nei jin kuang chuang zong ti bei xi xiang dai zhuang fen bu ;ga pi gou bei xi dai de di xu ci bei xi xiang 、bei dong xiang gou zao kong zhi kuang chuang kuang ti de kong jian fen bu ,gou cheng gou zao kong kuang yao su ;tai gu jie ga pi gou qun san dao gou yan zu zhong de xie chang jiao shan yan 、jiao shan xie chang pian ma yan zai kong jian shang wei jin kuang kuang ti de zhu yao rong kuang yan dan ,ji jin deng cheng kuang yuan su han liang ji bian yi ji shu 、nong ji ji shu te zheng biao ming ji wei jin kuang cheng kuang di gong wu zhi lai yuan ,gou cheng jin kuang cheng kuang de ceng yan xing yao su ;yin zhi ji 、yan shan zao ji ou yu hua gang zhi yan jiang huo dong ,zai shi jian 、kong jian 、re ye lai yuan 、cheng kuang wu zhi lai yuan 、cheng kuang dong li xue te zheng fang mian kong zhi kuang ti de chan chu ji fen bu ,gou cheng cheng kuang yan jiang yan tiao jian 。ga pi gou cheng kuang ou jin kuang de xing cheng shi shang shu gou zao 、de ceng yan xing 、yan jiang zuo yong tiao jian zeng ge zuo yong de chan wu 。gen ju de zhi ji hang ci 、chong li zeng ge xin xi jie yi jie guo ,que ding le ga pi gou cheng kuang ou de cheng kuang de zhi ti 、cheng kuang jie gou mian ji kong kuang gou zao lei xing ji te zheng ,wei hou xu zhao kuang qian li ping jia dian ding ji chu 。3.gen ju ye wai guan cha ,jie ge de zhi 、hang ci 、chong li 、hua tan zeng ge xin xi jie yi ,que ding le ga pi gou jin cheng kuang ou de jin kuang yu ce yao su 。dui yi zhi kuang chuang yan jiu que ding cheng kuang you guan de gui hua 、huang tie kuang hua 、jia hua 、juan ying yan hua 、huang tie juan ying yan hua he lu ni dan hua 、lu lian dan hua 、tan suan yan hua wei jin kuang yu ce de de zhi biao zhi ;ga pi gou bei xi xiang gou zao ji ji pa sheng de di xu ci bei xi xiang 、bei dong xiang duan lie gou zao yi ji cheng kuang you guan mai yan ji zhong fa yo de duan ye shi jin kuang cheng kuang yu ce de de zhi biao zhi 。dui ou yu hua tan shu ju jie yi jie guo biao ming ,ga pi gou cheng kuang ou nei Au、Ag、Zn、Mo、Sb、Hg、Pb、Cudeng wei zhu yao cheng kuang yuan su (bian yi ji shu ),ju Au、Ag、Pb、Zn、As、U、Modeng yuan su biao xian chu yi ge zhu cheng kuang ji (jie duan ),Cu、Bi、W、Sb、Hg、Sn、Thdeng yuan su biao xian chu liang ge huo yi shang cheng kuang ji (jie duan );cheng kuang yuan su hua fen wei Ag-Cu-Pb-Zn、Co-Ni-Ti-V、Au-Bi-W、F-Mo-Th、As-B-Sb、Mn-Snhe Hg-Udeng yuan su zu ge ,biao ming ou nei cheng kuang yuan su ju you duo lai yuan 、duo jie duan die jia fu ji te zheng ,que ding Au、Bi、W、Ag、Pb、Zn、Cu、Sb、Mndeng yuan su yi chang ji Au-Bi-W、Ag-Cu-Pb-Znzu ge yi chang (yuan su zu ge yin zi de fen zhi de yi chang ou )wei jin kuang zhao kuang de de qiu hua xue biao zhi 。dui ou yu hang ci 、chong li shu ju jin hang hua ji 、yan ta 、jie xi ,gen ju bu tong shang yan gao du bu tong fang xiang shui yi jie dao shu zhou zhi (ji da zhi huo ji xiao zhi )fan ying wu xing bian hua jie mian ,bu tong shang yan gao du chui xiang er jie dao shu 0deng zhi xian fan ying bu tong wu xing de zhi ti bian jie te zheng ,di qu le hang ci 、chong li de xian xing gou zao xin xi he huan xing gou zao xin xi ,gen ju jin kuang chuang kuang ti yu chong ci jie yi xian xing gou zao 、huan xing gou zao de kong jian yi cun guan ji ,que ding chong ci jie yi bei xi xiang gou zao 、bei dong xiang gou zao (wu xing jie mian )ji ji jiao hui bu wei ,bei xi xiang gou zao yu huan xing gou zao de jiao hui bu wei kong zhi kuang chuang kuang ti kong jian fen bu ,que ding ji wei jin kuang zhao kuang de de qiu wu li biao zhi 。4.gen ju ga pi gou cheng kuang ou jin kuang chuang 、kuang dian de fen bu te zheng ji ji yu kong kuang de ceng yan xing 、gou zao 、yan jiang yan ji chong ci jie yi xian xing gou zao 、huan xing gou zao guan ji ,zong jie le ou yu jin kuang cheng kuang gui lv 。di chu ou nei jin kuang chuang (dian )zai kong jian fen bu shang ju you ming xian de bu jun yun kuang hua yu ji zhong fen bu 、deng jian ju gui lv ,zhe zhu yao shou ga pi gou qun de ceng yan xing 、bei xi xiang huo bei dong xiang gou zao 、tai gu dai TTGfen bu yi ji zhong sheng dai hua gang yan fen bu zeng ge kong zhi ;ga pi gou cheng kuang ou jin kuang chuang (dian )duo chan yu bei xi xiang yu bei dong xiang xian gou zao jiao hui fu ge bu wei 、huan xing gou zao (huo cheng kuang de zhi ti )chan zhuang bian hua bu wei 、huan xing gou zao yu xian gou zao jiao hui de duan ;jin kuang cheng kuang zuo yong ji zhong fa sheng yu yin zhi yan shan zao ji 。5.yi ji yu GISping tai de ou yu kuang chan zi yuan zeng ge xin xi ping jia ji tong (MRAS)wei ji chu ,yi zheng ju quan fa wei mo xing ,di qu ga pi gou jin cheng kuang ou de de zhi (de ceng yan xing 、gou zao ji yan jiang yan )、kuang chan (kuang chuang 、kuang dian ji kuang hua dian )deng cheng kuang xin xi ji chong li 、hang ci 、hua tan deng yu ce xin xi (biao zhi ),kai zhan 1:5mo jin kuang zeng ge xin xi cheng kuang yu ce yan jiu ,gong juan ding Aji cheng kuang yu ce ou 5chu ,Bji cheng kuang yu ce ou 8chu ,Cji cheng kuang yu ce ou 11chu ,bing li yong shu liang hua li lun Ⅰmo xing dui ge cheng kuang yu ce ou jin hang zi yuan liang gu suan ,huo de jin kuang yu ce zi yuan liang zong ji 348t,wei yan jiu ou kai zhan hou xu jin kuang kan cha di gong shua ou ji ke xue yi ju 。
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