萤石Sm—Nd同位素体系对晴隆锑矿床成矿时代和物源的制约
Samarium-Neodymium isotope system of fluorites from the Qinglong antimony deposit, Guizhou Province: Constraints on the mineralizing age and ore-forming materials'''' sources.
-
摘要: 本文首次对黔西南晴隆锑矿床的萤石进行Sm-Nd同位素研究,来探讨该矿床的形成时间和成矿物源.研究表明,该矿主成矿期的萤石构成两组等时线,其对应的等时线年龄分别为148±8 Ma和142±16 Ma,显示该矿床的成矿作用发生在晚侏罗世.本次测定的成矿年龄数据远小于峨眉山玄武岩的成岩年龄,暗示该矿床与该区二叠纪的火山作用没有直接的成因联系.计算表明,在晴隆锑矿床成矿时(142 Ma),两组萤石的εNd(t)值分别为-5.72~-5.81和-3.81~-3.88,远小于峨眉山玄武岩的相应值(0.40~3.27);两组萤石初始Nd同位素组成的差异,暗示其Nd的来源存在不均一性,这很可能与萤石沉淀环境围岩的局部差异有关.在εSr(t)-εNd(t)图解中,萤石明显分布在与赋矿围岩不同的区域,暗示该矿的成矿物质主要是来自外部(可能是下伏老地层或基底),而不是赋矿的峨眉山玄武岩和茅口组灰岩,因此,该矿并非是前人认定的"原地改造成矿".
-
关键词:
- Sm-Nd同位素体系 /
- 成矿时代 /
- 成矿物源 /
- 萤石 /
- 贵州晴隆
-
[1] [1]Cai Huajun and Zhang Baogui. 1996. REE geochemistry of fluorites from the stibnite-fluorite deposits. Geology Geochemistry, 24(2):103-106 (in Chinese with English abstract)
[2] [2]Cai Huajun, Zhang Baogui and Li Yuansheng. 1997. Fluid inclusion geochemistry of antimony deposits at the triangle area of Yunnan, Guizhou and Guangxi Provinces. Acta Mineralogica Sinica, 17(4):427-434 (in Chinese with English abstract)
[3] [3]Cao Junchen, Li Benchao, Li Xin\'an et al. 1987. Geochemistry of strata-bound fluorite deposits. Geochemistry of Strata-Bound Deposits in China (Vol.2). Beijing: Science Press. 224-259 (in Chinese)
[4] [4]Chen Daiyan. 1991. A research on stable isotopes of major strata-bound Sb-Hg ore deposits in Eastern Yunnan and Western Guizhou. Geology of Guizhou, 8(3):227-240 (in Chinese with English abstract)
[5] [5]Chen Yu, Liu Xiucheng and Zhang Qihou. 1984. A tentative discussion on the genesis of the Dachang antimony deposit, Qinglong County, Guizhou Province. Mineral Deposits, 3(3):1-10 (in Chinese with English abstract)
[6] [6]Cherniak D J, Zhang X Y, Wayne N K et al. 2001. Sr, Y and REE diffusion in fluorite. Chem. Geol., 181:99-111
[7] [7]Chesley J T, Halliday A N, Kyser T K et al. 1994. Direct dating of MVT mineralization: use of Sm-Nd in fluorite. Econ. Geol., 89:1192-1199
[8] [8]Chesley J T, Halliday A N, Scrivener R C. 1991. Samarium-Neodymium direct dating of fluorite mineralization. Science, 252:949-951
[9] [9]Chung S L and Jahn B M. 1995. Plume-lithosphere interaction in generation of the Emeishan flood basalts at the Permian-Triassic boundary. Geology, 23:889-892
[10] [10]Feng Yuexing, Chen Minyang and Xu Wenxin, 1993, Stable isotope geochemistry research of Dushan antimony ore deposits. Mineral Resources and Geology. 7(2):119-126 (in Chinese with English abstract)
[11] [11]Galindo C, Pankhurst R J, Casquet C et al. 1997. Age, Sr- and Nd-isotope systematics, and origin of two fluorite lodes, Sierras Pampeanas, Argentina. International Geology Reviews, 39:948-954
[12] [12]Galindo C, Tornos F, Darbyshire D P F et al. 1994. The age and origin of the barite-fluorite veins of the Sierra del Guadarrama: a radiogenic and stable isotope study. Chem. Geol., 112:351-364
[13] [13]Halliday A N, Shepherd T J, Dicken A P et al. 1990. Sm-Nd evidence for the age and origin of a MVT ore deposit. Nature, 344:54-56
[14] [14]Han Wenbin, Zhang Wenyou, Huang Wenming et al. 1992. The isotopic geochemistry of fluorites in Wuyi fluorite Mine, Zhejiang Province. Geochimica, 21 (4):354-364 (in Chinese with English abstract)
[15] [15]Li Huaqin, Liu Jiaqi, Du Guomin et al. 1992. The metallogenic geochronology of endogenic metal deposits -- Taking Xihuashan W deposit as an example. Chinese Bulletin of Sciences, 37(12):1109-1112 (in Chinese)
[16] [16]Li Zhichang, Wan Jianhua, and Du Guomin. 1987. Sm-Nd isochron of fluorites. Geology Geochemistry, 15(9): 67-68 (in Chinese with English abstract)
[17] [17]Liao Chaozhong. 1983. A study on the genesis of Dachang antimony deposit, Guizhou. Guizhou Science-Technology Information of Geology, (1):16-28 (in Chinese with English abstract)
[18] [18]Liao Shanyou and Hu Tao. 1990. The ore-controlling condition and ore-forming mechanism of the Dachang antimony deposit, Qinglong County, Guizhou Province. Geology of Guizhou, 7(3):229-235 (in Chinese with English abstract)
[19] [19]Liu Dongsheng and Geng Wenhui. 1985. Mineralogical features and metallogenic conditions for Carlin-type gold deposit in China. Geochimica, 14(3):277-282(in Chinese with English abstract)
[20] [20]Menuge J F, Feely M and O\'Reilly C. 1997. Origin and granite alteration effect of hydrothermal fluid: Isotopic evidence from fluorite veins, Co. Galway, Ireland. Mineral Deposita, 32:34-43
[21] [21]Michard A and Albar閐e F. 1986. The REE content of some hydrothermal fluids. Chem. Geol., 55:51-60
[22] [22]Michard A. 1989. Rare earth element systematics in hydrothermal fluids. Geochim. Cosmochim. Acta, 53:745-750
[23] [23]Nie Fengjun, Jiang Sihong, Liu Yan et al. 2002. Sm-Nd isotopic dating of fluorite separates from Dongqiyishan fluorite deposit, Alxa, Western Inner Mongolia. Mineral Deposits, 21(1):10-15 (in Chinese with English abstract)
[24] [24]Peng Jiantang, Hu Ruizhong and Jiang Guohao. 2003. Sr isotope geochemistry of fluorite from the Qinglong antimony deposit, Southwestern Guizhou. Geological Journal of China Universities, 9(2):244-251 (in Chinese with English abstract)
[25] [25]Peng Jiantang, Hu Ruizhong, Qi Liang et al. 2002. REE geochemistry of fluorite from the Qinglong antimony deposit and its geological implications. Chinese Journal of Geology, 37(3):277-287 (in Chinese with English abstract)
[26] [26]Song Xieyan, Hou Zengqian, Cao Zhimin et al. 2001. Geochemical characteristics and period of the Emei Igneous Province. Acta Geologica Sinica, 75(4):498-506 (in Chinese with English abstract)
[27] [27]Xu Cheng, Huang Zhilong, Qi Liang, et al. 2002. REE and isotopic geochemistry of fluorites in the Maoniuping rare-earth deposit, Sichuan Province. Geochimica, 31(2):180-190 (in Chinese with English abstract)
[28] [28]Zhang Guolin, Yao Jinyan, Gu Xiangpin. 1998. The type of Chinese antimony deposits and its temporal, spatial distribution regularities. Mineral Resources and Geology, 12(5):306-311 (in Chinese with English abstract)
[29] [29]Zhu Xun. 1999. The China Situation of Mineral Resources (vol.2). Beijing: Science Press. 448-449 (in Chinese with English abstract)
[30] [30]蔡华君,张宝贵,李院生.1997.滇黔桂三角地区锑矿床流体包裹体研究.矿物学报,17(4):427-434
[31] [31]蔡华君,张宝贵.1996.辉锑矿-萤石共生矿床中萤石的稀土元素地球化学.地质地球化学,24(2):103-106
[32] [32]曹俊臣,李本超,李新安等.1987.层控萤石矿床地球化学.中国层控矿床地球化学(第二卷).北京:科学出版社,1987.224-259
[33] [33]陈代演.1991.滇东黔西主要层控锑汞矿床稳定同位素研究.贵州地质,8(3):227-240
[34] [34]陈豫,刘秀成,张启厚.1984.贵州晴隆大厂锑矿床成因探讨.矿床地质,3(3):1-10
[35] [35]俸月星,陈民扬,徐文昕.1993.独山锑矿稳定同位素地球化学研究.矿产与地质,7(2):119-126
[36] [36]韩文彬,张文育,黄文明等.1992.浙江武义萤石矿田同位素地球化学研究.地球化学,21(4):354-364
[37] [37]李华芹,刘家齐,杜国民等.1992.内生金属矿床成矿作用年代学研究-以西华山钨矿床为例.科学通报,37(12):1109-1112
[38] [38]李志昌,万建华,杜国民.1987.萤石Sm-Nd等时线.地质地球化学,15(9):67-68
[39] [39]廖朝中.1983.贵州大厂锑矿床成因探讨.贵州地质科技情报,(1):16-28
[40] [40]廖善友,胡涛.1990.贵州晴隆大厂锑矿床控矿条件及成矿机理.贵州地质,7(3):229-235
[41] [41]刘东升,耿文辉.1985.我国卡林型金矿矿物特征及成矿条件探讨.地球化学,14(3):277-282
[42] [42]聂凤军,江思宏,刘妍等.2002.阿拉善东七一大型萤石矿床萤石钐-钕同位素年龄及地质意义.矿床地质,21(1):10-15
[43] [43]彭建堂,胡瑞忠,蒋国豪,2003.贵州晴隆锑矿床中萤石的Sr同位素地球化学.高校地质学报,9(2):244-251
[44] [44]彭建堂,胡瑞忠,漆亮等.2002.晴隆锑矿床中萤石的稀土元素特征及其指示意义.地质科学,37(3):277-287
[45] [45]宋谢炎,侯增谦,曹志敏等.2001.峨眉山火成岩省的岩石地球化学特征及时限.地质学报,75(4):498-506
[46] [46]许成,黄智龙,漆亮等.2002.四川牦牛坪稀土矿床萤石稀土元素、同位素地球化学.地球化学,31(2):180-190
[47] [47]张国林,姚金炎,谷湘平.1998.中国锑矿床类型及时空分布规律.矿产与地质,12(5):306-311
[48] [48]朱训.1999.中国矿情(V.2. 金属矿产).北京:科学出版社.448-449
计量
- 文章访问数: 7157
- PDF下载数: 6690
- 施引文献: 0