| 豫西南栾川地区铅锌矿床碳、氧同位素地球化学 |
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| 引用本文： | 段士刚,薛春纪,冯启伟,高炳宇,刘国印,燕长海,宋要武.豫西南栾川地区铅锌矿床碳、氧同位素地球化学[J].现代地质,2010,24(4). |
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| 作者姓名： | 段士刚 薛春纪 冯启伟 高炳宇 刘国印 燕长海 宋要武 |
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| 作者单位： | 1. 地质过程与矿产资源国家重点实验室,中国地质大学,地球科学与资源学院,北京,100083
2. 河南省地质调查院,河南,郑州,450007 |
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| 基金项目： | 地质过程与矿产资源国家重点实验室开放基金，中央高校基本科研业务费专项资金项目，高等学校学科创新引智计划项目，长江学者和创新团队发展计划项目，国家自然科学基金 |
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| 摘 要： | 豫西南地区铅锌矿产勘查工作近年来进展迅速,尤其在栾川地区先后发现十余处铅锌银多金属矿脉群、上百条含矿断裂带,铅、锌、银资源前景广阔。对该区铅锌矿的科学研究丰富了华北陆块南缘区域成矿学认识,并促进了进一步找矿勘查工作。栾川地区铅锌矿产在燕山期斑岩体周围矽卡岩中和外围的断裂带(脉状)中。脉状铅锌矿脉石矿物碳酸盐C、O同位素的组成(赤土店矿床1δ3C为-3.66‰~-2.82‰,1δ8O为10.31‰~15.86‰;百炉沟矿床1δ3C为-3.00‰~1.80‰,1δ8O为9.40‰~17.70‰;冷水北沟矿床1δ3C为-4.90‰~-0.40‰,1δ8O为6.00‰~12.50‰)介于典型海相石灰岩(1δ3C为0±2‰,1δ8O为28‰~30‰)和岩浆岩(1δ3C为-3‰~-30‰,1δ8O为6‰~12‰;地幔1δ3C为-7‰~-5‰)之间,指示成矿流体、成矿物质的岩浆和地层双重作用、两种来源特点。综合分析认为,栾川地区铅锌矿有矽卡岩型和岩浆热液充填-交代型两种。
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| 关 键 词： | 铅锌矿床 碳、氧同位素 岩浆热液充填-交代型矿床 矽卡岩型矿床 豫西南栾川 |
Carbon and Oxygen Isotope Compositions of Gangue Carbonates in Pb-Zn Ore Deposits in Luanchuan District, Southwest Henan Province |
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| DUAN Shi-gang,XUE Chun-ji,FENG Qi-wei,GAO Bing-yu,LIU Guo-yin,YAN Chang-hai,SONG Yao-wu.Carbon and Oxygen Isotope Compositions of Gangue Carbonates in Pb-Zn Ore Deposits in Luanchuan District, Southwest Henan Province[J].Geoscience——Journal of Graduate School,China University of Geosciences,2010,24(4). |
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| Authors: | DUAN Shi-gang XUE Chun-ji FENG Qi-wei GAO Bing-yu LIU Guo-yin YAN Chang-hai SONG Yao-wu |
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| Abstract: | It has been made a big progress in Pb-Zn Prospecting in southwestern Henan Province recently.Especially,more than ten vein groups of Pb-Zn-Ag mineralization(more than 100 Pb-Zn-Ag veins) have been found in Luanchuan district,which shows a broad prospection of Pb-Zn-Ag resources.The scientific research on these Pb-Zn-Ag ore veins enriches knowledge on regional metallogeny of southern margin of North China Craton and promotes the pace of Pb-Zn prospecting.Pb-Zn ores in Luanchuan district occur in skarn around Yanshannian porphyries or in fractures(vein type) peripheral to Yanshannian porphyries.Gangue carbonate of vein type Pb-Zn ore has carbon and oxygen isotope compositions(Chitudian Pb-Zn deposit: δ13C ranges from-3.66‰ to-2.82‰ and δ18O ranges from 10.31‰ to 15.86‰;Bailugou Pb-Zn deposit: δ13C ranges from-3.00‰ to 1.80‰,δ18O ranges from 9.40‰ to 17.70‰;Lengshuibeigou Pb-Zn deposit: δ13C ranges from-4.90‰ to-0.40‰,δ18O ranges from 6.00‰ to 12.50‰) between typical marine limestone(δ13C is 0 ± 2‰,δ18O ranges from 28‰ to 30‰) and magmatic rock(δ13C ranges from-3‰ to-30‰,δ18O ranges from 6‰ to 12‰;mantle: δ13C ranges from-5‰ to-7‰),which shows the ore forming fluid and metals bear characteristics of dual function and both sources of magma and strata.It can be concluded from synthetic analysis that Pb-Zn ore deposits in Luanchuan district are skarn type or magmatic hydrothermal filling-metasomatic type. |
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| Keywords: | lead and zinc deposit carbon and oxygen isotope magmatic hydrothermal filling-metasomatic type deposit skarn type deposit Luanchuan Southwest Henan Province |
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