Characteristics of Fluid Inclusions and Ore Genesis of Chuduoqu Pb-Zn Ore Deposit in Tuotuohe Area, Qinghai Province
-
摘要: 青海省沱沱河地区楚多曲铅锌矿为近年来发现的一处大型铅锌矿床.铅锌矿体主要呈脉状产出,主要受控于切割碳酸盐岩地层的陡倾断裂.通过对系统流体包裹体研究,结果表明,石英中流体包裹体较为发育,主要为气液两相包裹体.成矿流体均一温度为160～220℃,盐度w(NaCl)为8%～10%,密度为0.90～0.95 g/cm3,具有低温、低盐度、低密度的特征.估算成矿压力为11～13 MPa,深度为1.1～1.3 km,属浅成深度.成矿流体δD为-96.4‰~122.1‰,δ18OH2O值为2.1‰~9.5‰.综合区域构造背景、铅锌矿体形成特点、流体包裹体特征及矿石组构等相关信息,认为楚多曲铅锌矿矿床成因类型为受断裂控制的中低温热液脉型铅锌矿床.该认识可极大拓展青海省沱沱河地区铅锌矿的找矿潜力,具有重要的研究意义和实用价值.Abstract: The Chuduoqu Pb-Zn deposit is a large newly found mineral deposit in Tuotuohe of Qinghai Province. Its ore-bodies occur as veins, controlled by the steep fracture that cut the carbonatite strata. The research of fluid inclusion shows that fluid inclusions are well developed in quartz, mainly in gas-liquid phase. The ore-forming fluid is characterized by medium-low temperature (160-220℃), low salinity (8%-10%NaCl) and low density (0.90-0.95 g/cm3), with pressure of 11 to 13 MPa and depth of 1.1 to 1.3 km. The δD value of the ore-forming fluid is -122.1‰ to -96.4‰ and the δ18OH2O value is 2.1‰ to 9.5‰. Combined with the regional tectonic background, ore-forming characteristics of lead and zinc, fluid inclusions and ore fabrics, this paper summarized that Chuduoqu Pb-Zn deposit is a medium-low temperature hydrothermal vein Pb-Zn deposit controlled by fractures. This conclusion is of great academic and applied significance to improve lead-zinc ore potential in Tuotuohe area.
-
-
刘长征,陈岳龙,许光,等.地球化学块体理论在青海沱沱河地区铅锌资源潜力预测中的应用[J].地学前缘,2011,18(5):271-282. Liu Changzheng, Chen Yuelong, Xu Guang, et al. The application of geochemical block theory to lead and zinc resources assessment in Tuotuohe area of Qinghai Province[J].Earth Science Frontiers,2011,15(5):271-282.
孙岩,王训练,陈建平,等.基于证据权重法的沱沱河地区铅锌银矿成矿预测[J].地质通报,2010,29,(4):556-564. Sun Yan, Wang Xunlian, Chen Jianping, et al. Lead-zinc-silver metallogenic prediction based on GIS in Tuotuo River region,Qinghai,China[J]. Geological Bulletin of China,2010, 29,(4):556-564.
钱烨.青藏高原沱沱河地区成矿背景及铅锌成矿作用[D].吉林大学地球科学学院,2014. Qian Ye. Metallogenic setting and metallogenesis of lead and zinc in Tuotuohe region, Qinghai-Tibet Plateau[D].College of Earth Sciences,Jilin University,2014.
王贵仁,宋玉财,邹公明,等.青海南部查曲帕茶Pb-Zn矿床的勘查历史、现状与下一步找矿方向[J].岩石矿物学杂志,2012,31(1).79-89. Wang Guiren, Song Yucai, Zou Gongming, et al. History,current status and next targets of exploration in the Chaqupacha Pb-Zn deposit,Southern Qinghai Province[J].Acta Petrologica Et Mineralogica, 2012,31(1).79-89.
张翀,宋玉财,侯增谦,等.青海沱沱河地区那日尼亚铅锌矿床地质与地球化学研究[J].岩石矿物学杂志,2013,32(3):291-304. Zhang Chong, Song Yucai, Hou Zengqian, et al. Geological and Geochemical studies of Nariniya lead-zinc deposit in Tuouohe area,Qinghai Province[J]. Acta Petrologica Et Mineralogica,2013,32(3):291-304.
陈建平,王倩,董庆吉,等.青海沱沱河地区遥感蚀变信息提取[J].地球科学-中国地质大学学报,2009,34(2):314-318. Chen Jianping, Wang Qian, Dong Qingji, et al. Extraction of remote sensing alteration information in Tuotuohe,Qinghai Province[J].Earth Science-Journal of China University of Geosciences,2009,34(2):314-318.
宋玉财,侯增谦,杨天南,等.青海沱沱河多才玛特大型Pb-Zn矿床—定位预测方法与找矿突破过程[J].矿床地质,2013,32(4):744-756. Song Yucai, Hou Zengqian, Yang Tiannan, et al. Mineral prospecting and its related approaches in Duocaima Pb-Zn deposit in Tuotuohe,Qinghai Province[J].Mineral Deposit, 2013,32(4):744-756.
易平乾,汪元奎,顾瑛.沱沱河地区多金属成矿规律初步探讨[J].青海国土经略,2007,(1):35-38. Yi Pingqian, Wang Yuankui, Gu Ying. Preliminary study on polymetal metallogenic regularity of Tuotuohe area[J].Management and Plan for Territory of Qinghai Province,2007,(1):35-38.
康玉柱.中国古大陆形成及古生代演化特征[J].天然气工业,2010,30(3):1-7. Kang Yuzhu. The formation and evolution of the Paleozoic paleocontinent in China [J]. Natural Gas. Industry, 2010, 30(3):1-7.
李红霞,郭锋,李超文,等.晚古生代古亚洲洋俯冲作用:来自珲春前山镁铁质侵入岩的年代学和地球化学记录[J].岩石学报,2010,26(5):1531-1540. Li Hongxia, Guo Feng, Li Chaowen, et al. Late Paleozoic subduction of the Paleo-Asian Ocean: Geochronological and geochemical records from Qianshan mafic intrusion in Hunchun area, NE China[J]. Acta Petrologica Sinica, 2010,26(5): 1531-1540.
李文渊,张照伟,高永宝,等.秦祁昆造山带重要成矿事件与构造响应[J].中国地质,2011,38(5):1135-1149. Li Wenyuan, Zhang Zhaowei, Gao Yongbao, et al. Important metallogenic events and tectonic response of Qinling, Qilian and Kunlun orogenic belts[J]. Geology in China,2011,38(5):1135-1149.
卢焕章,范洪瑞,倪培,等. 流体包裹体[M]. 第一版. 北京:科学出版社,2004:1-450. Lu Huanzhang,Fan Hongrui,Ni Pei,et al.Fluid inclusion[M].Science Press,Beijing,2004:1-450.
孙丰月,金巍,李碧乐,等.关于脉状热液金矿床成矿深度的思考[J].长春科技大学学报,2000,30(增刊):27-30. Sun Fengyue,Jin Wei,Li Bile,et al. Deep thinking about metallogenic depth of vein hydrothermal gold deposit [J]. Journal of Changchun Technology and Science University,2000,30(suppl.):27-30.
夏林圻,夏祖春,徐学义,等.天山古生代洋陆转化特点的几点思考[J].西北地质, 2002, 35(4):9-20. Xia Linqi, Xia Zuchun, Xu Xueyi, et al. Some thoughts on the characteristics of Paleozoic ocean-continent trasition from Tianshan mountains [J]. Northwestern Geology, 2002, 35(4): 9-20.
夏林圻,夏祖春,徐学义,等.天山及邻区石炭纪—早二叠世裂谷火山岩岩石成因[J].西北地质,2008,41(4):1-68. Xia Linqi, Xia Zuchun, Xu Xueyi, et al. Petrogenesis of Caboniferous-Early Permian rift-related volcanic rocks in the Tianshan and its neighboring Areas, Northwestern China[J].Northwestern Geology,2008, 41(4):1-68.
姚凤良,孙丰月. 矿床学教程[M]. 北京:地质出版社,2006:1-155. Yao Fengliang,Sun Fengyue.Deposit tutorial [M]. Geological Publishing House,Beijing,2006:1-155.
张勤山,尹和峥. 沱沱河-唐古拉地区中低温热液成因多金属矿床地质特征及找矿标志[J].青海国土经略,2010,(2):45-48. Zhang Qinshan,Yin Hezheng.Geological characteristics and prospecting markers of middle-low temperature hydrothermal polymetallic deposit in Tuotuohe-Tanggula area[J].Management and Plan for Territory of Qinghai Province,2010,(2):45-48.
朱毅秀, 刘洛夫, 林畅松. 中亚地区费尔干纳盆地油气地质特征[J]. 兰州大学学报(自然科学版),2005,41(1):25-31. Zhu Yixiu, Liu Luofu, Lin Changsong. Petroleum geology of Fergana Basin in Central Asia[J]. Journal of Lanzhou University (Natural Sciences), 2005,41(1):25-31.
Franco P J, Mao J W, Zhang Z C,et al. The association of mafic-ultramafic intrusions and A-type magmatism in the Tian Shan and Altay orogens, NW China: Implications for geodynamic evolution and potential for the discovery of new ore deposits[J].Journal of Asian Earth Sciences, 2008,32(2):165-183.
Friedman I, O'Neil J R, Fleischer M. Compilation of stable isotope fractionation factors of geochemical interest[M].United States Geological Survey, 1977:440.
Niu Y L, O'Hara M J. MORB mantle hosts the missing Eu (Sr, Nb, Ta and Ti) in the continental crust: New perspectives on crustal growth, crust-mantle differentiation and chemical structure of oceanic upper mantle[J].Lithos, 2009,112 (1-2):1-17.
Taylor J R, Frechen J, Degens E T,et al. Oxygen and carbon isotope studies of carbonatites from the Laacher See district, West Germany and the Aln district, Sweden[J].Geochimica et Cosmochimica Acta, 1967,31(3):407-430.
Zhou M F, Zhao J H, Jiang C Y,et al.OIB-like, heterogeneous mantle sources of Permian basaltic magmatism in the western Tarim Basin, NW China: Implications for a possible Permian large igneous province[J]. Lithos,2009, 113(3-4):583-594.
计量
- 文章访问数: 2863
- HTML全文浏览量: 0
- PDF下载量: 3414
下载:
