江苏栖霞山铅锌银多金属矿床硫同位素组成及成矿模式
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摘要
以江苏栖霞山铅锌多金属矿床为研究对象,通过分析矿石硫化物S同位素组成特征,讨论了矿床物质来源及成矿模式。研究表明:①矿石闪锌矿、方铅矿、黄铜矿δ~(34)S为-3.9‰～4.0‰,平均为1.46‰,集中分布特征显著;②热液特征黄铁矿δ~(34)S为-5.1‰～4.2‰,平均值为-0.15‰,具有岩浆硫特征,沉积特征黄铁矿δ~(34)S为-27.4‰～6.9‰,平均为-9.8‰,属同生沉积成因;③结合栖霞山矿床的成矿地质背景、矿床地质特征及已有矿床成因的认识,综合分析认为S源自深部岩浆、赋矿层位,总体属岩浆热液型铅锌多金属矿床;④矿体严格受控于层位、纵向断裂及不整合面,栖霞山铅锌多金属矿床为多因素耦合、临界转换、边界成矿的结果,矿床深部、侧伏方向及Ⅱ~#勘查区断裂构造附近为重要的找矿方向。
Taking Qixiashan Pb-Zn Deposit in Jiangsu Province as the study example,the sulfur isotope compositions of sulfide ore is analyzed,and the metallogenic material sources and metallogenic model are analyzed.The study results show that:①the δ~(34)S value of the sphalerite,galena and chalcopyrite vary from-3.9‰ to 4.0‰,with the average δ~(34)S value of 1.46‰,which characterized by concentrated distribution;②the δ~(34)S value of the hydrothermal-type pyrite vary from-5.1‰ to 4.2‰,with the average δ~(34)S value of-0.15‰,which characterized by magmatic sulfur,the δ~(34)S value of the sedimentary-type pyrite vary from-27.4‰ to 6.9‰,with the average δ~(34)S value of-9.8‰,which belongs to sedimentary origin;③according to the comprehensive analysis results of the metallogenic geological-background,geological characteristics and the deposit genesis of Qixiashan Pb-Zn Deposit,it is indicated that the deep-magma and ore-bearing strata are the main sources of sulfur isotope,and the deposit is belongs to magmatic-hydrothermal type Pb-Zn deposit;④the ore-bodies are strictly controlled by horizon,longitudinal fracture and unconformity surface.The above analysis results show that the Qixiashan Pb-Zn metallogenic deposit is an achievement of multi-factor coupling,critical transition and marginal metallogenesis,and the deep section,lateral trending and vicinal area are the significant prospecting directions.
Taking Qixiashan Pb-Zn Deposit in Jiangsu Province as the study example,the sulfur isotope compositions of sulfide ore is analyzed,and the metallogenic material sources and metallogenic model are analyzed.The study results show that:①the δ~(34)S value of the sphalerite,galena and chalcopyrite vary from-3.9‰ to 4.0‰,with the average δ~(34)S value of 1.46‰,which characterized by concentrated distribution;②the δ~(34)S value of the hydrothermal-type pyrite vary from-5.1‰ to 4.2‰,with the average δ~(34)S value of-0.15‰,which characterized by magmatic sulfur,the δ~(34)S value of the sedimentary-type pyrite vary from-27.4‰ to 6.9‰,with the average δ~(34)S value of-9.8‰,which belongs to sedimentary origin;③according to the comprehensive analysis results of the metallogenic geological-background,geological characteristics and the deposit genesis of Qixiashan Pb-Zn Deposit,it is indicated that the deep-magma and ore-bearing strata are the main sources of sulfur isotope,and the deposit is belongs to magmatic-hydrothermal type Pb-Zn deposit;④the ore-bodies are strictly controlled by horizon,longitudinal fracture and unconformity surface.The above analysis results show that the Qixiashan Pb-Zn metallogenic deposit is an achievement of multi-factor coupling,critical transition and marginal metallogenesis,and the deep section,lateral trending and vicinal area are the significant prospecting directions.
引文
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[14] 毛景文,邵拥军,谢桂青,等.长江中下游成矿带铜陵矿集区铜多金属矿床模型[J].矿床地质,2009,28(2):109-119.
[15] 钱建民,钟增球,楼新涛,等.浙江治岭头狂天地球化学特征的研究[J].金属矿山,2008(6):82-84.
[16] 武彬,樊献科,王爱国,等.新疆若羌喀腊达坂铅锌矿床S同位素特征及找矿预测[J].金属矿山,2018(2):112-120.
[17] 白云,陈志,陈毓川,等.尕尔穷—嘎拉勒铜金矿集区S、Pb同位素地球化学特征[J].金属矿山,2015(9):100-104.
[18] 刘孝善,吴澄宇,黄标.河南栾川南泥湖—三道庄钼(钨)矿床热液系统的成因与演化[J].地球化学,1987(3):199-207.
[19] 张明超.江苏栖霞山铅锌银多金属矿床成矿作用研究[D].北京:中国地质大学(北京),2015.
[2] 叶水泉,曾正海.南京栖霞山铅锌银多金属矿床流体包裹体研究[J].华东地质,2000,21(4):266-274.
[3] 储彬彬,罗立强,王晓芳,等.南京栖霞山铅锌矿区铅同位素示踪[J].地球学报,2012,33(2):209-215.
[4] 徐忠发,曾正海.南京栖霞山铅锌银矿床成矿作用于岩浆活动关系探讨[J].地质学刊,2006,30(3):177-182.
[5] 桂长杰,景山.南京旗下三铅锌多金属矿成矿特征及找矿方向[J].地质学刊,2011,35(4):395-400.
[6] 张明超,吕志成,于晓飞,等.江苏栖霞山矿床铜的来源探讨[J].地质论评,2016(S1):147-148.
[7] 张明超,李景朝,左超群,等.江苏栖霞山铅锌银多金属矿床成矿时代探讨[J].中国矿业,2015(S2):128-134.
[8] 张术根,阳杰华.宁镇中段燕山期中酸性侵入岩的稀土和微量元素地球化学特征[J].地质与勘探,2008,44(6):42-46.
[9] 关俊朋,韦福彪,孙国曦,等.宁镇中段中酸性侵入岩锆石U-Pb年龄及其成岩成矿指示意义[J].大地构造与成矿学,2015,39(2):344-354.
[10] 陈志洪,赵玲,李亚楠.长江中下游宁镇矿集区非含矿岩体的锆石U-Pb年龄及其意义[J].矿物岩石地球化学通报,2017,36(1):171-178.
[11] 刘建敏,闫峻,李全忠,等.宁镇地区安基山岩体锆石LA-ICPMS U-Pb定年及意义[J].地质论评,2014,60(1):190-200.
[12] 曾键年,李锦伟,陈津华,等.宁镇地区安基山侵入岩SHRIMP锆石U-Pb年龄及其地质意义[J].地球科学:中国地质大学学报,2013,38(1):57-67.
[13] 徐继峰,王强,徐义刚,等.宁镇地区中生代安基山中酸性侵入岩的地球化学:亏损重稀土和钇的岩浆产生的限制[J].岩石学报,2001,17(4):576-584.
[14] 毛景文,邵拥军,谢桂青,等.长江中下游成矿带铜陵矿集区铜多金属矿床模型[J].矿床地质,2009,28(2):109-119.
[15] 钱建民,钟增球,楼新涛,等.浙江治岭头狂天地球化学特征的研究[J].金属矿山,2008(6):82-84.
[16] 武彬,樊献科,王爱国,等.新疆若羌喀腊达坂铅锌矿床S同位素特征及找矿预测[J].金属矿山,2018(2):112-120.
[17] 白云,陈志,陈毓川,等.尕尔穷—嘎拉勒铜金矿集区S、Pb同位素地球化学特征[J].金属矿山,2015(9):100-104.
[18] 刘孝善,吴澄宇,黄标.河南栾川南泥湖—三道庄钼(钨)矿床热液系统的成因与演化[J].地球化学,1987(3):199-207.
[19] 张明超.江苏栖霞山铅锌银多金属矿床成矿作用研究[D].北京:中国地质大学(北京),2015.