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| 兰坪金顶铅锌矿方解石微量元素、流体包裹体和碳-氧同位素地球化学特征研究 | |
| 引用本文： | 唐永永,毕献武,和利平,武丽艳,冯彩霞,邹志超,陶琰,胡瑞忠.兰坪金顶铅锌矿方解石微量元素、流体包裹体和碳-氧同位素地球化学特征研究[J].岩石学报,2011,27(9):2635-2645. |
| 作者姓名： | 唐永永 毕献武 和利平 武丽艳 冯彩霞 邹志超 陶琰 胡瑞忠 |
| 作者单位： | 1. 中国科学院地球化学研究所矿床地球化学国家重点实验室,贵阳550002;中国科学院研究生院,北京100049 2. 中国科学院地球化学研究所矿床地球化学国家重点实验室,贵阳,550002 3. 云南金鼎锌业有限公司,金顶镇,671401 |
| 基金项目： | 本文受国家重点基础研究发展规划项目(2009CB421005)和中国科学院重要方向项目群项目(KZCX2-YW-Q04-01)联合资助. |
| 摘 要： | 金顶铅锌矿矿床成因一直受到广泛关注,但至今没有达成共识,其重要原因之一是对矿床成矿流体性质和来源认识的局限。本文以金顶铅锌矿床成矿早期脉状方解石和晚期结核状方解石为研究对象,系统开展了微量元素、流体包裹体和碳-氧同位素地球化学研究,在此基础上探讨了该矿床成矿流体的性质和可能的来源。研究发现,虽然2种产状方解石都以轻稀土富集、轻重稀土显著分异、配分模式向右陡倾为特征,并且具有相似的Mg、Fe和Mn含量,但它们在微量元素、流体包裹体和碳-氧同位素地球化学特征上亦存在显著差异。脉状方解石相对于结核状方解石稀土元素总量较高,富集Co、Ni、(W)、Mo、Bi;脉状方解石流体包裹体显示相对高温高盐度的特征(Th>250℃,S>8.0% NaCleqv),而结核状方解石流体包裹体相对低温低盐度(Th<200℃,S<8.0% NaCleqv); 脉状方解石的碳同位素组成(δ13CPDB=-22.95‰~-2.56‰)较分散,具有多源性,而结核状方解石碳同位素组成(δ13CPDB=-7.02‰~-6.18‰)相对集中,二者的氧同位素组成(δ18OSMOW=20.16‰~23.49‰)与沉积岩类似。综合分析认为,金顶铅锌矿成矿期脉状和结核状方解石虽然均属热液成因,但它们分别代表了2类不同性质的热液体系,早期成矿流体为多源的混合流体,成矿过程中可能有深源组分的加入,而晚期成矿流体以大气降水为主。 |
| 关 键 词： | 微量元素 碳-氧同位素 流体包裹体 方解石 金顶铅锌矿 兰坪盆地 |
| 收稿时间： | 2011/3/15 0:00:00 |
| 修稿时间： | 7/7/2011 12:00:00 AM |
Geochemical characteristics of trace elements, fluid inclusions and carbon-oxygen isotopes of calcites in the Jinding Zn-Pb deposit, Lanping, China |
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| TANG YongYong,BI XianWu,HE LiPing,WU LiYan,FENG CaiXi,ZOU ZhiChao,TAO Yan and HU RuiZhong.Geochemical characteristics of trace elements, fluid inclusions and carbon-oxygen isotopes of calcites in the Jinding Zn-Pb deposit, Lanping, China[J].Acta Petrologica Sinica,2011,27(9):2635-2645. | |
| Authors: | TANG YongYong BI XianWu HE LiPing WU LiYan FENG CaiXi ZOU ZhiChao TAO Yan and HU RuiZhong |
| Institution: | State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;Yunnan Jinding Zinc Industry Limited Company, Jinding Town 671401, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China |
| Abstract: | The metallogenic mechanism of the Jinding Zn-Pb deposit is always of catholic concern,but it cannot reach a consensus.One of important causes is ascribed to limiting understanding in ore-forming fluid properties and its sources.Therefore,systematic geochemical studies of trace elements,fluid inclusions and carbon-oxygen isotopes on vein calcites and nodule calcites,formed in early and late mineralization respectively,have been carried out to investigate the ore-forming fluid nature and its potential sources... |
| Keywords: | Trace elements C-O isotopes Fluid inclusion Calcite Jinding Zn-Pb deposit Lanping Basin |
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