Source of Metallogenic Material of Lawu Zn-Cu Polymetallic Deposit in Gangdise Metallogenic Belt, Tibet: Sulfide LA-MC-ICP-MS in-situ S Isotope Constraint
-
摘要: 拉屋中型矽卡岩型锌铜多金属矿床位于中冈底斯铅锌多金属成矿带东段。该矿床以铜铅锌矿化为主，并伴生钨锡矿化，明显不同于区域上的铅锌银矿床。锌铜多金属矿体主要产于二长花岗岩与石炭系接触带的矽卡岩中，其次赋存于角岩化砂质板岩。为查明成矿物质来源，笔者采用激光剥蚀-多接收等离子体质谱（LA-MC-ICP-MS）分析法，对矿床中发育的金属硫化物进行原位硫同位素分析。测试结果显示，黄铁矿δ34Sv-CDT值为-2.57‰～-1.17‰，平均值为-1.65‰；黄铜矿δ34Sv-CDT值为+1.32‰～+2.74‰，平均值为+1.73‰；方铅矿δ34Sv-CDT值为+0.84‰～+1.53‰，均值为+1.09‰。原位S同位素总体分布较为集中，δ34Sv-CDT为-2.57‰～+2.74‰，平均值为+0.09‰。综合分析认为，拉屋锌铜多金属矿床硫化物S同位素组成与区域上广泛发育的铅锌多金属矿床相似，均与印度大陆与欧亚大陆碰撞造山过程形成的S型花岗岩相关，成矿物质来源于岩浆，属典型的矽卡岩型矿床，而非前人认为的喷流沉积矿床。Abstract: Lawumedium skarn type Zn-Cu polymetallic deposit is located in the eastern section of the Middle Gangdise Pb-Zn polymetallic metallogenic belt.The deposit is dominated by Cu-Pb-Zn mineralization, accompanied by W-Sn mineralization,obviously different from the Pb-Zn-Ag deposits developed in the same region.The Zn-Cu polymetallic ore bodies are mainly produced in the skarn of the contact zone between the monzogranite and carboniferous system, and occur in the hornfels sandy slate.To find out the source of ore-forming materials, the authors carried out the in-situ S isotope analysis by LA-MC-ICP-MS.The results are as follows:in Lawu deposit, the δ34Sv-CDT values in pyrite is-2.57‰~-1.17‰, averaging-1.65‰; theδ34Sv-CDT values in chalcopyrite is+1.32‰~+2.74‰, averaging+1.73‰; theδ34Sv-CDT values in galena is+0.84‰~+1.53‰,with an average value of+1.09‰. The in-situ S isotope distribution is relatively concentrated, the δ34Sv-CDT is-2.57‰~+2.74‰,averaging +0.09‰. Comprehensive analysis shows that the composition of isotopic sulfide in Lawu Zn-Cu polymetallic ore deposit is similar to that of the lead-zinc polymetallic deposit extensively developed in this area,relating to S-type granite caused by the orogenic collision of Indiacontinent and Eurasia.Ore-forming material was a typical skarn type deposit,rather than the sedimentary exhalative deposit previous studies suggested.
-
-
陈好寿, 周肃, 魏琳, 等.成矿作用年代学及同位素地球化学[M].北京:地质出版社,1994.
程文斌, 顾雪祥, 唐菊兴.西藏冈底斯-念靑唐古拉成矿带典型矿床硫化物Pb同位素特征-对成矿元素组合分带性的指示[J].岩石学报,2010,26(11):3350-3362.
CHENG Wenbin, GU Xuexiang, TANG Juxing, et al. Lead isotope characteristics of ore sulfides from typical deposits in the Gangdese-Nya inqentanglha metallogen ic belt:Implications for the zonation of oreforming elements[J].Acta Petrologica Sinica,2010,26(11):3350-3362.
崔玉斌, 赵元艺, 屈文俊, 等.西藏当雄地区拉屋矿床磁黄铁矿Re-Os同位素测年和成矿物质来源示踪[J].地质通报,2011,30(08):1283-1293.
CUI Yubing, ZHAO Yuanyi, QU Wenjun, et al. Re-Os dating and ore-forming material tracing of the Lawu ore deposit in Damxung area, Tibet[J].Geological Bulletin of China,2011,30(08):1283-1293.
董磊.西藏当雄县拉屋铜锌矿床控岩控矿构造研究[D].北京:中国地质科学院,2013.
董磊, 李光明, 兰双双, 等.西藏当雄县拉屋铜锌矿床控岩控矿特征初探[D],北京:中国地质科学院,2017.
杜欣, 刘俊涛, 王亚平.西藏拉屋铜铅锌多金属矿床地质特征及成因分析[J].矿产与地质,2004,18(05):410-414+449.
DU Xin, LIU Juntao, WANG Yaping.Geological Character and Ore Genesis of the Lawu Copper-Lead-Zinc Polymetall IC Ore Deposit[J].Mineral Resources and Geology,2004,18(05):410-414+449.
费光春, 多吉, 温春齐, 等.西藏洞中拉铅锌矿床S,Pb,Sr同位素组成对成矿物质来源的示踪[J].矿物岩石,2011,31(04):52-57.
FEI Guangchun, DUO Ji, WEN Chunqi, et al. S,Pb and Sr Isotopic Compositions for Tracing Sources of ore-forming Materials in Dongzhongla Lead-Zinc Deposit in Tibet[J]. Mineral Petrol,2011,31(04):52-57.
郝军, 喻亨祥, 谢洪顺.西藏当雄县拉屋铜铅锌矿成矿规律浅析[J].中国科技信息,2007,(11):20-21,23.
HAO Jun, YUN Hengxiang, XIE Hongshun.A brief analysis of metallogenic law of Lawu Copper-lead-zinc deposit in Dangxiong County, Xizang Province[J].China Science and Technology Information,2007,(11):20-21,23.
何国朝, 赵延朋, 原恩慧, 等.西藏拉屋铜锌矿床成因探讨[J].矿产与地质,2009,23(2):147-150.
HE Guochao, ZHAO Yanpeng, YUAN Enhui, et al. Discussion on the genesis of the Lawu copper-zinc deposit, Tibet[J].Mineral Resources and Geology,2009,23(2):147-150.
胡庆成, 吕新彪, 高奇, 等.热液金矿金的溶解和迁移研究进展[J].地球科学进展,2012,27(8):847-856.
HU Qingcheng, LÜ Xinbiao, GAO Qi, et al. Dissolution and Migration of Au in Hydrothermal Ore Deposit:A Review[J].Advance in Earth Sciences,2012,27(8):847-856.
吉林大学地质调查研究院.1:25万门巴区幅地质调查成果与进展[J].沉积与特提斯地质,2005,25(1-2):100-110.
Jilin University.1:250 000 Mainba Sheet in Xizang[J].Sedimentary Geology and Tethyan Geology,2005,25(1-2):100-110.
江磊, 王若梅, 李智明.矽卡岩型矿床特征概述[J].西北地质,2012,45(增):167-168.
JIANG Lei, WANG Ruomei, LI Zhiming.An overview of the characteristics of skarn type deposits[J].Northwestern Geology,2012,45(suppl.):167-168.
柯贤忠, 王晶, 钟石玉, 等.西藏则学地区热液脉型铅锌矿S、Pb同位素组成及其对成矿物质来源的启示[J].中国地质,2019,46(03):629-641.
KE Xianzhong, WANG Jing, ZHONG Shiyu, et al. Sulfur and lead isotope composition of hydrothermal vein type lead-zinc deposits in Zexue area,Tibet and its implications for the origin of ore-forming material[J].Geology in China,2019,46(03):629-641.
李光明, 王高明, 高大发, 等.西藏冈底斯南缘构造格架与成矿系统[J].沉积与特提斯地质,2002,22(2):1-7.
LI Guangming, WANG Gaoming, GAO Dafa, et al. The tectonic framework and metallogenic systems in southern Gangdise metallogenic belt, Xizang[J].Sedimentary Geology and Tethyan Geology,2002,22(2):1-7.
李光明, 王高明, 高大发, 等.西藏冈底斯铜矿资源前景与找矿方向[J].矿床地质,2002,21(增):144-147.
LI Guangming, WANG Gaoming, GAO Dafa, et al. Perspective of Copper Ore Deposit and Its Exploration Direction in Gangdise Metallogenic Belt, Tibet[J].Mineral Deposits,2002,21(suppl.):144-147.
连永牢, 曹新志, 燕长海, 等.西藏当雄县拉屋铜铅锌多金属矿床喷流沉积成因[J].吉林大学学报(地球科学版),2010,40(05):1041-1046+1065.
LIAN Yonglao, CAO Xinzhi, YAN Changhai, et al. Exhalative Sedimentary Genesis of Lawu Copper Lead-Zinc Deposit in Dangxiong County of Tibet[J].Journal of Jilin University(Earth Science Edition),2010,40(05):1041-1046+1065.
连永牢, 曹新志, 燕长海, 等.西藏工布江达县亚贵拉铅锌矿床地质特征及成因分析[J].地质与勘探,2009,45(05):570-576.
LIAN Yonglao, CAO Xinzhi, YAN Changhai, et al. Geological Characteristics and Genesis of Yaguila Lead-Zinc Depositin the Gongbujiangda County of Tibet Province[J].Geology and Exploration,2009,45(05):570-576.
刘洪, 吕新彪, 李春诚, 等.河南罗山金城金矿床成矿条件与深部找矿前景分析[J].地质与勘探,2013,49(2):265-273.
LIU Hong, LÜ Xinbiao, LI Chuncheng, et al. Metallogenic Conditions and Ore-Searching Prospect at Depth of the Jincheng Gold Ore Deposit in Luoshan County, Henan Province[J].Geology and Exploration,2013,49(2):265-273.
潘桂棠, 陈智梁, 李兴振.东特提斯地质构造形成演化[M].北京:地质出版社,1997.
唐攀, 唐菊兴, 冷秋锋, 等.西藏轮郎铅锌矿床S、Pb同位素组成及对成矿物质来源的示踪[J].岩石矿物学杂志,2016,35(6):1045-1054.
TANG Pan, TANG Juxing, LENG Qiufeng, et al. S,Pb isotope composition and source tracing of ore-forming materials in the Lunlang lead zinc deposit,Tibet[J].Acta Petrologica et Mineralogica,2016,35(6):1045-1054.
王立强, 程文斌, 罗茂澄, 等.西藏蒙亚啊铅锌矿床金属硫化物、石英稀土元素组成特征及其成因研究[J].中国地质,2012,39(03):740-749.
WANG Liqiang, CHENG Wenbin, LUO Maocheng, et al. A study of metallic sulfides, quartz REE composition characteristics and genesis of the Mengya'a lead-zinc deposit[J].Geology in China,2012,39(03):740-749.
王振琦, 朱秀兰, 刘恒轩, 等.西藏当雄县拉屋铜铅锌矿地质特征及找矿标志[J].四川地质学报,2018,38 (1):70-72.
WANG Zhenqi, ZHU Xiulan, LIU Hengxuan, et al. Geological Features and Prospecting of the Lawu Cu-Pb-Zn Deposit in Damxung, Tibet[J].Acta Geologica Sichuan,2018,38 (1):70-72.
西藏地质矿产局.西藏自治区区域地质志[M].北京:地质出版社,1993.
肖万峰, 李光明, 马东方, 等.西藏当雄县拉屋铜铅锌矿床的控矿构造浅析[J].矿床地质,2012,31(增):1069-1070.
辛存林, 都卫东, 张育平, 等.西藏洞中松多铅锌多金属矿床地质特征及成因[J].兰州大学学报(自然科学版),2013,49(01):24-31.
XIN Cunlin, DU Weidong, ZHANG Yuping, et al. A preliminary study of the geologic characteristics and genesis of the Dongzhongsongduo lead-zinc polymetallic deposit, Tibet[J].Journal of Lanzhou University (Natural Sciences),2013,49(01):24-31.
杨勇, 罗泰义, 黄智龙, 等.西藏纳如松多银铅矿S、Pb同位素组成:对成矿物质来源的指示[J].矿物学报,2010,30(03):311-318.
YANG Yong, LUO Taiyi, HUANG Zhilong, et al. Sulfur and Lead Isotope Compositions of the Narusongduo Silver Zinc-Lead Deposit in Tibet:Implications for the Sources of Plutons and Metals in the Deposit[J].Acta Mineralogica Sinica,2010,30(03):311-318.
尹观, 倪师军.同位素地球化学[M].北京:地质出版社,2009.
西藏自治区当雄县拉屋矿区铜铅锌矿详查地质报告[R].中国地质调查局成都地质调查中心,2013.
Bao Zhian, Chen Lu, Zong Chunlei,et al. Development of pressed sulfide powder tablets for in situ sulfur and lead isotope measurement using LA-MC-ICP-MS[J].International Journal of Mass Spectrometry,2017,421:255-262.
Chaussidon M, Lorand J.P.Sulphur isotope composition of orogenic spinel lherzolite massifs from ariege (north-eastern pyrenees, france):an ion microprobe study[J].Geochimica et Cosmochimica Acta,1990,54(10):2835-2846.
Chen Lu, Chen Kaiyun, Bao Zhian,et al. Preparation of standards for in-situ sulfur isotope measurement in sulfides using femtosecond laser ablation MC-ICP-MS[J].Journal of Analytical Atomic Spectrometry,2017,32(1):107-116.
Chen Lu, Yuan Honglin, Chen Kaiyun,et al. In-situ sulfur isotope analysis by laser ablation MC-ICPMS and a case study of the Erlihe Zn-Pb ore deposit, Qinling orogenic belt, Central China[J].Journal of Asian Earth Sciences,2019,176:325-336.
H Ohmoto.Systematics of sulfur and carbon isotopes in hydrothermal ore deposits[J].Economic Geology,1972,67(5):551-578.
P Richards J.Tectonic, magmatic, and metallogenic evolution of the Tethyan orogen:From subduction to collision[J].Ore Geology Reviews,2015,70:323-345.
Tang Pan, Tang Juxing, Wang Ying,et al. Zircon U-Pb geochronology, geochemistry, S-Pb-Hf isotopic compositions, and mineral chemistry of the Xin'gaguo skarn Pb-Zn deposit, Tibet, China[J].Geological Journal,2019.
Wang Liqiang, Cheng Wenbin, Tang Juxing,et al. U-Pb geochronology, geochemistry, and H-O-S-Pb isotopic compositions of the Leqingla and Xin'gaguo skarn Pb-Zn polymetallic deposits, Tibet, China[J].Journal of Asian Earth Sciences,2016,115:80-96.
Wang Liqiang, Tang Juxing, Bagas Leon,et al. Early Eocene Longmala skarn Pb-Zn-Cu deposit in Tibet, China:Geochemistry, fluid inclusions, and H-O-S-Pb isotopic compositions[J].Ore Geology Reviews,2017,88:99-115.
Yuan Honglin, Liu Xu, Chen Lu,et al. Simultaneous measurement of sulfur and lead isotopes in sulfides using nanosecond laser ablation coupled with two multi-collector inductively coupled plasma mass spectrometers[J].Journal of Asian Earth Sciences,2018,154:386-396.
Zhao Xiaoyan, Yang Zhusen, Zheng Yuanchuan,et al. Geology and genesis of the post-collisional porphyry-skarn deposit at Bangpu, Tibet[J].Ore Geology Reviews,2015,70:486-509.
-
计量
- 文章访问数: 625
- PDF下载数: 64
- 施引文献: 0
下载: