内蒙古太仆寺旗沙子沟钼矿床地质特征
摘要
钼是一种重要的战略性资源,广泛应用于高新技术领域。沙子沟钼矿床位于华北地台北缘正镶白旗—多伦多金属成矿区内,为近年发现的矿产地,研究程度较低。通过资料收集与分析、野外踏勘、光、薄片鉴定、微量元素测试、包裹体成分测试、稳定同位素分析等,系统地研究了矿床地质特征,初步探讨了矿床成因。取得以下成果:
1、矿床赋存于白云鄂博群变质岩中,为一隐伏矿床。由四个矿化带共计32个矿体组成。矿化带呈60°-70°展布,平面上多呈舒缓波状弯曲。控制的矿化范围长500m,宽700m,矿体呈层状、似层状,矿石具自形—半自形晶、他形晶结构,浸染状构造。主要矿石矿物辉钼矿呈细脉状、星点状分布。
2、成矿过程划分为热液成矿期、表生期,其中热液成矿期进一步划分为石英—黑钨矿、石英—辉钼矿—黄铁矿、石英—硫化物三个成矿阶段,石英—辉钼矿—黄铁矿阶段是主要的成矿阶段。
3、矿石中的黄铁矿δ34S=6.7‰~7.1‰,平均6.9‰,指示硫来自深部岩浆。成矿流体属硅酸盐熔融体+金属组份型,推断成矿流体主要为岩浆水。矿床成因类型属于石英脉型钼矿床。
以上成果对于沙子沟钼矿床的深部勘探及外围找矿具有指导意义,并进一步丰富了华北地块北缘多金属成矿带的成矿理论。
Molybdenum is an important strategic resources, widely used in high-tech fields. Located in the Zhengxiangbaiqi-Duolun polymetallic (Au-Pb-Zn) ,northern margin of the North China platform ,The newly discovered Shazigou Mo deposit have a low research. Through the data collection, analysis methods of field investigation, thin section identification,trace elements, compositions of fluid inclusions and stable isotope, study geological characteristics and discuss the genesis of Shazigou Mo deposit.the following achievement have been obtained:
1、The deposit occurs in metamorphic rocks of Baiyunebo group. It is composed of four mineralized zones, they are typically between 60 and 70 degree,almost near the level of relief wavy spread,and about 500 meters long,700 meters thick,Ore bodies are like thick layer, The ore typically shows granular structure, disseminated structures. Molybdenite shows thin vein-like, star-shaped points .
2、Process was divided into hydrothermal ore mineralization period supergene stage, Hydrothermal mineralization is further divided into quartz - wolframite, quartz - molybdenite - pyrite, quartz - sulfide ore-forming three stage, quartz - molybdenite - pyrite mineralization stage is the main stage.
3、δ34S=6.7‰~7.1‰, the average value of 34S in pyrite is 6.9‰c the sulfur came mainly from the deep magma. Composition of fluid inclusions is type of silicate melt and metal component,Infer magmatic water is the main ore-forming fluid.The genetic type of siderite deposit belongs to quartz-vein Mo deposit .
The study can not only guide the deep exploration and external prospecting, but also conducive to the northern margin of North China block-rich polymetallic metallogenic belt theory.
1、矿床赋存于白云鄂博群变质岩中,为一隐伏矿床。由四个矿化带共计32个矿体组成。矿化带呈60°-70°展布,平面上多呈舒缓波状弯曲。控制的矿化范围长500m,宽700m,矿体呈层状、似层状,矿石具自形—半自形晶、他形晶结构,浸染状构造。主要矿石矿物辉钼矿呈细脉状、星点状分布。
2、成矿过程划分为热液成矿期、表生期,其中热液成矿期进一步划分为石英—黑钨矿、石英—辉钼矿—黄铁矿、石英—硫化物三个成矿阶段,石英—辉钼矿—黄铁矿阶段是主要的成矿阶段。
3、矿石中的黄铁矿δ34S=6.7‰~7.1‰,平均6.9‰,指示硫来自深部岩浆。成矿流体属硅酸盐熔融体+金属组份型,推断成矿流体主要为岩浆水。矿床成因类型属于石英脉型钼矿床。
以上成果对于沙子沟钼矿床的深部勘探及外围找矿具有指导意义,并进一步丰富了华北地块北缘多金属成矿带的成矿理论。
Molybdenum is an important strategic resources, widely used in high-tech fields. Located in the Zhengxiangbaiqi-Duolun polymetallic (Au-Pb-Zn) ,northern margin of the North China platform ,The newly discovered Shazigou Mo deposit have a low research. Through the data collection, analysis methods of field investigation, thin section identification,trace elements, compositions of fluid inclusions and stable isotope, study geological characteristics and discuss the genesis of Shazigou Mo deposit.the following achievement have been obtained:
1、The deposit occurs in metamorphic rocks of Baiyunebo group. It is composed of four mineralized zones, they are typically between 60 and 70 degree,almost near the level of relief wavy spread,and about 500 meters long,700 meters thick,Ore bodies are like thick layer, The ore typically shows granular structure, disseminated structures. Molybdenite shows thin vein-like, star-shaped points .
2、Process was divided into hydrothermal ore mineralization period supergene stage, Hydrothermal mineralization is further divided into quartz - wolframite, quartz - molybdenite - pyrite, quartz - sulfide ore-forming three stage, quartz - molybdenite - pyrite mineralization stage is the main stage.
3、δ34S=6.7‰~7.1‰, the average value of 34S in pyrite is 6.9‰c the sulfur came mainly from the deep magma. Composition of fluid inclusions is type of silicate melt and metal component,Infer magmatic water is the main ore-forming fluid.The genetic type of siderite deposit belongs to quartz-vein Mo deposit .
The study can not only guide the deep exploration and external prospecting, but also conducive to the northern margin of North China block-rich polymetallic metallogenic belt theory.
引文
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[3]李向龙.浅谈中国钼工业现状与发展[J].中国金属通报,2008,(45):37-38
[4]刘军民.我国钼资源现状及对策[J].中国有色金属,2009,(4):60-61
[5]吴爱祥.我国钼资源的分布与特征[J].中国钼业,1994,53:6-9
[6]彭如清.中国钨钼资源现状与对外贸易态势[J].中国钼业,2002,26(4):3-7
[7]刘浩元,王安民.钼矿床工业分类实例[J].中国钼业,1999,23(3):15-16
[8]中国矿床编委会.中国矿床[M].北京:地质出版社,1989
[9]付静波,赵宝华.国内外钼工业发展现状[J].稀有金属,2007,31:151-153
[10]王德志,赵宝华,杨刘晓.走循环经济之路,促进钼业可持续发展[J].中国钼业,2006,30(3):3.
[11]彭如清.全面协调可持续发展中国钼业[J].中国钼业,2004,28(4):3.
[12]王顺昌,世界钼经济近况[J].中国钼业,1997,21(2、3),22-23
[13]徐爱东,杨召会.近年来钼市场分析[J],世界有色金属,2006,3:41-44。
[14]冯进城,卢欣祥,刘东华等.当前钼矿开发热与资源开发政策[J].河南省国土资源,2005,(9):12-14.
[15]马杏垣、吴正文.华北地台基地构造[J].地质学报,1979,53(4)
[16]王东方.华北地台北缘地质构造演化及多金属成矿带的构造控制问题[J].矿床地质,1987,6(3)
[17]芮宗瑶,黄崇轲,齐国明等.中国斑岩铜(钼)矿床[M].北京:地质出版社,1984
[18]王东方等.中朝陆台北缘大陆构造地质[M].北京:地质出版社,1992
[19]内蒙古自治区地质矿产局.内蒙古自治区区域地质志[R].地质出版社,1991
[20]祁思敏.内蒙古板块运动的证据及与地槽演化的关系.第一届全国构造地质学术会议论文选集,地质出版社,1991
[21]胡骁,许传诗,牛树银.华北地台北缘早古生代大陆边缘演化[M].北京大学出版社,1990
[22]张文佑.华北断块区的形成与发展[M].科学出版社,1990
[23]任纪舜.中国东部及邻区大地构造演化的新见解[J].中国区域地质,1989
[24]王荃.内蒙古中部中朝与西伯利亚古板块缝合线的确定[J].地质学报,1986,60(1)
[25]丛柏林等.我国东部中生代火山岩岩石化学及其地质意义[J].中国科学,1977,(3)
[26]裴荣富,吕凤翔,范继璋等.华北地块北缘及其北侧金属矿床成矿系列与勘查[M].北京:地质出版社,1998.1
[27]周成宪等.遥感影象地学理解与分析[M].科学出版社,2003
[28]张万良等.赣南九龙嶂火山盆地遥感影象构造分析[M].遥感科技论坛,中国宇航出版社,2004
[29]孙家柄等.遥感原理方法和应用[M].测绘出版社,1997
[30]戴昌达等.遥感图像应用处理与分析[M].北京:清华大学出版社,2004
[31]中国科学院矿床地球化学开放研究实验室著.矿床地球化学[M].北京:地质出版社,1997
[32] Ohmoto H. Systematics of sufur and carbon isotopes in hydrothermal ore deposits. Econ Geol,1972.67:551-579
[33] Ohmoto H,Kaiser C J,Geer K A. Systematics of sulphur isotopes in recent marine sediments and ancient sediment-hosted base metal deposit. In:H. K Herbert and S. E. Ho(Editors),Stable isotopes and Fluid Processes in Mineralisation. Geol. Dep. Univ. Extens.,Univ. of Western Australia,1990.23:70-120
[34] Ohmoto H.,Goldhaber M B. Sulfer and carbon isotopes. In:Geochemistry of Hydrothermal deposits(ed H L Barnes),3rd Edition,John Wiley and Sons,New York,1997.517-614
[35]郑永飞,陈江峰.稳定同位素地球化学[M].北京:科学出版社,2000
[36]张理刚.稳定同位索在地质科学中的应用[M].西安:陕西科学技术出版社,1985.23-250
[37] Poulsen K H ,Robert F ,Dube B. Geological Classification of Canadian gold deposits[J] . Geological Survey of Canada Bulletin ,2000,540:1-105.
[38]魏菊英,王关玉.同位素地球化学[M].北京:地质出版社,1988
[39]沈渭洲.稳定同位素地质[M].北京:原子能出版社,1987
[40]李延河.同位素示踪技术在地质研究中的某些应用[J].地学前沿,1998,5(1-2):275-281
[41]黎彤.化学元素的地球丰度[J].地球化学,1976,(3):167-174
[42]陈振胜,张理刚等.水岩交换作用及其成矿[J].地质与勘探,1989,(3):7-11
[43]杜乐天.地壳流体与地幔流体间的关系[J].地学前缘,1996,3(3):172-180
[44]华仁民.成矿过程中由流体混合而导致金属沉淀的研究[J].地球科学进展,1994,9(4):15-21
[45]汤葵联.地质流体研究及其重要意义[J].国外地质科技,1994,(6):1-10
[46]周作侠等.华北地台南缘金、钼矿床成因[M].北京:地震出版社,1993
[47]翟裕生.关于构造-流体-成矿作用研究的几个问题[J].地学前缘,1996,3(4):230-235
[48]王安建,银剑钊,金魏等.流体研究与找矿预测[J].矿床地质,1997,16(3):279-285
[49]刘英俊,曹励明主编.元素地球化学导论[M].北京:地质出版社,1987
[50]张文淮,成矿流体及成矿机制[J].地学前沿,1996.3(3-4):245-252
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