湖南东山钨矿成矿地质条件及成矿预测研究
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摘要
东山钨矿位于湖南省南部临武县境内,是一个以白钨矿为主的矽卡岩—热液充填交代型矿床。
本文抓住成矿母岩形态和容矿构造两大因素进行重点分析,以查明矿床的定位机制,分析成矿地质条件,摸清成矿规律为目的,采用各种找矿方法和手段对盲矿体进行定位预测。通过研究分析矿床产出的地质背景、矿体的形态、产状、空间分布、矿体在剖面上的延伸与变化规律,矿体产出与构造的关系,矿体内部结构特点、容矿构造及其空间展布形式等,从中找出矿床和矿体形成的地质条件及成矿规律。
研究发现矿体产出与构造关系密切,矿体一般产出在接触带由陡变缓的凹部;岩浆侵入时产出的垂向直剪作用,在岩体外接触带形成张扭性断裂,是矿区重要的导矿构造和容矿构造;与接触带相连的古岩溶构造,是矿化富集的有利场所。该矿床的形成,主要控矿因素是地层、构造、岩浆岩。地层(碳酸盐岩)为成矿提供了成矿元素Ca和O,构造控制着矿体的形态产状和空间分布,岩浆岩为成矿提供了主要成矿元素W。通过分析成矿地质条件和成矿规律,辅以化探原生晕法和物探中的激电测深法,在矿区预测了找矿远景区。
Dongshan Tungsten ore deposit, lies in the Lingwu country of south of the Hunan province, is a Skarn- hydrothermal scouring replacement deposit, and scheelite is only useful mineral in this ore deposit.
Basic on the host-rock and the host structure characteristics, the author determined the location mechanisms, analysised the geologic formation conditions, summarized the metallogenic regularities, then predicted the blind orebody through some kinds of methods and determined the geological background, the shape, occurrence, spatial distribution, extention and variations of sections, the relationship between occurrence of orebody and structure, the inner structural characteristics of orebody, the host structure and distribution in spatial, then to discover some rules of geological conditions and metallogenic regularities.
We found out that the deposit related to structers closely. Orebody always occur at the low point of touch-zone. The orebody occurred in the concave of the touch-zone from steep to gentle. The observation under electron microscope to the sample affords the ore-forming mechanism. Indicator element in the geochemical prospecting plays an important role in prospecting the blind orebody in the deep. Prospecting with the IP sounding method find out the lower resistance and lower Cathode layer. Though analysise of the geological condition and metallogenic reglarities, then find out the prospecting area in the deposit.
本文抓住成矿母岩形态和容矿构造两大因素进行重点分析,以查明矿床的定位机制,分析成矿地质条件,摸清成矿规律为目的,采用各种找矿方法和手段对盲矿体进行定位预测。通过研究分析矿床产出的地质背景、矿体的形态、产状、空间分布、矿体在剖面上的延伸与变化规律,矿体产出与构造的关系,矿体内部结构特点、容矿构造及其空间展布形式等,从中找出矿床和矿体形成的地质条件及成矿规律。
研究发现矿体产出与构造关系密切,矿体一般产出在接触带由陡变缓的凹部;岩浆侵入时产出的垂向直剪作用,在岩体外接触带形成张扭性断裂,是矿区重要的导矿构造和容矿构造;与接触带相连的古岩溶构造,是矿化富集的有利场所。该矿床的形成,主要控矿因素是地层、构造、岩浆岩。地层(碳酸盐岩)为成矿提供了成矿元素Ca和O,构造控制着矿体的形态产状和空间分布,岩浆岩为成矿提供了主要成矿元素W。通过分析成矿地质条件和成矿规律,辅以化探原生晕法和物探中的激电测深法,在矿区预测了找矿远景区。
Dongshan Tungsten ore deposit, lies in the Lingwu country of south of the Hunan province, is a Skarn- hydrothermal scouring replacement deposit, and scheelite is only useful mineral in this ore deposit.
Basic on the host-rock and the host structure characteristics, the author determined the location mechanisms, analysised the geologic formation conditions, summarized the metallogenic regularities, then predicted the blind orebody through some kinds of methods and determined the geological background, the shape, occurrence, spatial distribution, extention and variations of sections, the relationship between occurrence of orebody and structure, the inner structural characteristics of orebody, the host structure and distribution in spatial, then to discover some rules of geological conditions and metallogenic regularities.
We found out that the deposit related to structers closely. Orebody always occur at the low point of touch-zone. The orebody occurred in the concave of the touch-zone from steep to gentle. The observation under electron microscope to the sample affords the ore-forming mechanism. Indicator element in the geochemical prospecting plays an important role in prospecting the blind orebody in the deep. Prospecting with the IP sounding method find out the lower resistance and lower Cathode layer. Though analysise of the geological condition and metallogenic reglarities, then find out the prospecting area in the deposit.
引文
[1]郴州幅地质图1/20万,地质出版,社1966
[2]王昌烈,柿竹园钨多金属矿床地质,地质出版社,1987
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[6]长春地院力学室,区域构造学,地质出版社,1979
[7]宋宏邦,黄满湘,樊钟衡,湖南东山钨矿地质特征及成矿预测,地质找矿丛论,2004
[8]徐开礼,朱志澄.构造地质学.地质出版社,2002
[9]李启昆.构造地质学.冶金出版社,1992
[10]胡祥昭.岩浆岩研究方法.中南大学地学与环境工程学院
[11]孟良义,花岗岩与成矿,科学出版社,1993
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[14]曾庆丰,论热液成矿条件,科学出版社,1986
[15]朱焱龄,赣南钨矿床地质,江西人民出版社,1981
[16]湖南有色238队,东山钨矿南部找矿报告,1995
[17]湖南有色206队,东山钨矿南部找矿报告,1995
[18]卢焕章,典型金属矿床的成因及其构造环境,地质出版社,1995
[19]韩吟文,马振东.地球化学.地质出版社.2003
[20]李祖材.构造地球化学成矿学.中南大学出版社,1999
[21]陈乐寿,王光鄂.构造电法勘探.中国地质大学出版社,1991
[22]南京大学地质系,华南不同时代花岗岩各类及其与成矿关系的研究,1966
[23]刘石年,成矿预测学,中南工业大学出版社,1993
[24]袁见齐,朱上庆,翟裕生等.矿床学.地质出版社:115-130
[25]查.赫.奇逊(英),矿床及其构造背景,地质出版社,1990
[26]布雅诺夫.构造地质学和域外地质学.地质出版社,1959
[27]Bryant D G.Intrusive breccias associated with ore,Warren(Bisbee)Mining District,Arizona.Economic Geology,1968,63(1):1-12
[28]Norton D L,Cathles L M.Breccia pipes,products of exsolved vapor from magmas.Economic Geology,1973,68(3):540-546
[29]Sharp J E.CavePeak,a molybdenum-mineralized breccia pipe complex in Culberson County,Texas.Economic Geology and theBul-letin of the Society of Economic Geologists,1979,74(3):517-534
[30]Norman D,I Sawkins FJ.The Tribag breccia pipes:Precambrian Cu-Mo deposits,Batchawana Bay,Ontario.Economic Geology,1985,80(5):1593-1621;
[2]王昌烈,柿竹园钨多金属矿床地质,地质出版社,1987
[3]陈国达,成矿构造研究法,地质出版社,1978
[4]陈国达.中国成矿大地构造图(1:400万).长沙:中南工业大学出版社,1999.
[5]昆明地质学校.构造地质及地质力学.地质出版社,1979
[6]长春地院力学室,区域构造学,地质出版社,1979
[7]宋宏邦,黄满湘,樊钟衡,湖南东山钨矿地质特征及成矿预测,地质找矿丛论,2004
[8]徐开礼,朱志澄.构造地质学.地质出版社,2002
[9]李启昆.构造地质学.冶金出版社,1992
[10]胡祥昭.岩浆岩研究方法.中南大学地学与环境工程学院
[11]孟良义,花岗岩与成矿,科学出版社,1993
[12]莫柱孙,南岭花岗岩地质学,地质出版社,1983
[13]越伦山等,地球化学,地质出版社,1988
[14]曾庆丰,论热液成矿条件,科学出版社,1986
[15]朱焱龄,赣南钨矿床地质,江西人民出版社,1981
[16]湖南有色238队,东山钨矿南部找矿报告,1995
[17]湖南有色206队,东山钨矿南部找矿报告,1995
[18]卢焕章,典型金属矿床的成因及其构造环境,地质出版社,1995
[19]韩吟文,马振东.地球化学.地质出版社.2003
[20]李祖材.构造地球化学成矿学.中南大学出版社,1999
[21]陈乐寿,王光鄂.构造电法勘探.中国地质大学出版社,1991
[22]南京大学地质系,华南不同时代花岗岩各类及其与成矿关系的研究,1966
[23]刘石年,成矿预测学,中南工业大学出版社,1993
[24]袁见齐,朱上庆,翟裕生等.矿床学.地质出版社:115-130
[25]查.赫.奇逊(英),矿床及其构造背景,地质出版社,1990
[26]布雅诺夫.构造地质学和域外地质学.地质出版社,1959
[27]Bryant D G.Intrusive breccias associated with ore,Warren(Bisbee)Mining District,Arizona.Economic Geology,1968,63(1):1-12
[28]Norton D L,Cathles L M.Breccia pipes,products of exsolved vapor from magmas.Economic Geology,1973,68(3):540-546
[29]Sharp J E.CavePeak,a molybdenum-mineralized breccia pipe complex in Culberson County,Texas.Economic Geology and theBul-letin of the Society of Economic Geologists,1979,74(3):517-534
[30]Norman D,I Sawkins FJ.The Tribag breccia pipes:Precambrian Cu-Mo deposits,Batchawana Bay,Ontario.Economic Geology,1985,80(5):1593-1621;