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| 云南会泽超大型铅锌矿床C、O同位素地球化学 | |
| 引用本文： | 黄智龙,李文博,陈进,许德如,韩润生,刘丛强.云南会泽超大型铅锌矿床C、O同位素地球化学[J].大地构造与成矿学,2004,28(1):53-59. |
| 作者姓名： | 黄智龙 李文博 陈进 许德如 韩润生 刘丛强 |
| 作者单位： | 1. 中国科学院地球化学研究所矿床地球化学开放室,贵州,贵阳,550002 2. 云南会泽铅锌矿,云南,会泽,654211 3. 中国科学院地球化学研究所矿床地球化学开放室,贵州,贵阳,550002;中国科学院广州地球化学研究所与南海海洋研究所边缘海地质重点实验室,广东,广州,510640 4. 昆明理工大学国土资源工程学院,云南,昆明,650093 |
| 基金项目： | 国家自然科学基金，云南省省院省校科技合作项目 |
| 摘 要： | 云南会泽超大型铅锌矿床规模大、品位富、伴生有用元素多,预示其成矿环境较为特殊。本文分析该矿床矿石中脉石矿物方解石和赋矿碳酸盐地层的C、O同位素组成,结果表明矿石中脉石矿物方解石的C、O同位素组成相对均一,不同矿体(不同标高)、不同产状以及相同矿体不同产状方解石的C、O同位素组成不具明显差别,其δ13CPDB值和δ18OSMOW值分别为-2.1‰～-3.5‰(均值-2.8‰)和16.7‰～18.6‰(均值17.7‰),在δ13CPDB-δ18OSMOW图上集中于岩浆碳酸岩与海相碳酸盐岩之间的狭小范围内。多方面的证据表明:矿床成矿流体为壳-幔混合流体,其中壳源组分可能主要由矿区(或区域)碳酸盐地层提供,而幔源组分则可能与区域大面积峨眉山玄武岩岩浆活动过程中的去气作用有关。 |
| 关 键 词： | C、O同位素地球化学 成矿流体 云南会泽超大型铅锌矿床 |
| 文章编号： | 1001-1552(2004)01-0053-07 |
| 修稿时间： | 2003年2月9日 |
CARBON AND OXYGEN ISOTOPE GEOCHEMISTRY OF THE HUIZE SUPERLARGE Pb-Zn ORE DEPOSITS IN YUNNAN PROVINCE |
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| HUANG Zhilong,LI Wenbo,CHEN Jin,XU Deru,HAN Runsheng and LIU Chongqiang.CARBON AND OXYGEN ISOTOPE GEOCHEMISTRY OF THE HUIZE SUPERLARGE Pb-Zn ORE DEPOSITS IN YUNNAN PROVINCE[J].Geotectonica et Metallogenia,2004,28(1):53-59. | |
| Authors: | HUANG Zhilong LI Wenbo CHEN Jin XU Deru HAN Runsheng and LIU Chongqiang |
| Institution: | HUANG Zhilong1,LI Wenbo1,CHEN Jin2,XU Deru1,4,HAN Runsheng3 and LIU Chongqiang1 |
| Abstract: | The Huize superlarge Pb-Zn ore deposit is characterized by its bi g scale, high contents of Pb+Zn and multiple concomitant elements, which shows th at its ore-forming condition is relatively special. This paper analyzes the car bon and oxygen isotopic compositions of calcites occurring as gangue mineral in ores and in carbonate strata that host the ores. The results show that the carbo n and oxygen isotopic compositions of the calcites are relatively homogeneous, a nd the carbon and oxygen isotopic compositions of the calcites that appear in di fferent ore bodies, have different occurrences and the same ore body with varied occurrences are not obviously different from one another. The values of ?13CPD B and ?18OSMOW of calcite range respectively from-2.1‰～-3.5‰(the average value is-2.8‰) and 16.7‰～18.6‰(the average value is 17.7‰). In the ?13CP DB vs ?18OSMOW diagram, the samples are plotted in a small field between carbon atite and marine carbonate. A variety of evidences demonstrate that the ore-for ming fluids are of the crustal-mantle mixing type, with the crustal composition s being mainly originated from the carbonate strata in the orefield, and the man tle compositions being related to the degassing process of the Emeishan basalt m agmatism. |
| Keywords: | carbon and oxygen isotope geochemistry ore-forming fluids Huize s uperlarge Pb-Zn deposits Yunnan Province |
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