| 刘必政,王建平,曾祥涛,王可心,曹瑞荣,程建军.陕西省岩房湾铅锌矿成矿流体与地球化学特征[J].地质找矿论丛,2013,28(1):50-57 |
| 陕西省岩房湾铅锌矿成矿流体与地球化学特征 |
| Ore fluid and geochemical characteristics of Yanfangwan Pb-Zn deposit in Shaanxi Province |
| 投稿时间：2012-03-02 修订日期：2012-07-03 |
| DOI：10.6053/j.issn.1001-1412.2013.01.007 |
| 中文关键词: 岩房湾铅锌矿 流体包裹体 成矿流体 地球化学 凤太矿集区 陕西省 |
| 英文关键词:Yanfangwan Pb-Zn deposit fluid inclusion ore fluid geochemistry Fengtai ore-deposit-cluster area Shaanxi Province |
| 基金项目:国家自然科学基金项目(编号:41030423)和中国黄金集团公司科技项目"陕西省太白县双王金矿床地质特征、成矿规律及找矿靶区再研究"联合资助。 |
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| 中文摘要: |
| 岩房湾铅锌矿位于陕西省太白县境内。文章通过矿床的成矿流体及地球化学特征研究,对比同属于风太矿田的八方山—二里河、铅硐山、银母寺等大型铅锌矿,认为岩房湾铅锌矿床成矿流体为中-低盐度、中-低温、含有CO2,N2,CH4等气体的还原性流体体系,并显示出热卤水成因特点。流体包裹体主要包括水溶液包裹体、CO2-H2O-NaCl包裹体、纯CO2包裹体3种类型,为不混溶包裹体群,均一温度高于八方山—二里河等铅锌矿,可能与西坝岩体的侵入有关。氢、氧同位素特征显示成矿流体为岩浆水与变质水的混合,碳、氧同位素特征显示成矿过程中碳质来源于泥盆纪正常海相碳酸盐岩,铅同位素特征显示出造山带与上地壳混合来源的特点。岩房湾铅锌矿成矿流体和同位素特征与同区大型SEDEX型铅锌矿存在着一些差异,不宜笼统将其与同区热水沉积成因大型铅锌矿床归为同一类型。 |
| 英文摘要: |
| Yanefangwan Pb-Zn deposit is a small Pb-Zn deposit of Fengtai ore-deposit-cluster area in Taibai county, Shaanxi Province and a few geological works have been done. Ore fluid of Yanfangwan Pb-Zn deposit is in medium-low temperature and low salinity and contains CO2, N2, CH4 etc. of the reductive gas system characteristic of hot saline. The fluid inclusions are mainly water solution, CO2-H2O-NaCl and pure CO2, the three kinds of inclusion which are immisible. The homogenization temperature is higher than that of Bafangshan-Erlihe Pb-Zn deposit that may be related to intrusion of Xiba rock body. H,O isotopic composition is characterized by mixture of magmatic water and metamorphic water, C,O isotopic composition by normal Silurian marine carbonate rock and Pb isotopic composition by mixture of Pb sourced from orogenic belt and that of upper crust. Isotopic characteristics of Yanfangwan Pb-Zn deposit differs obviously from those of large Sedex Pb-Zn deposits in the same area and is inapropriately classified into the hot water sedimentary large Pb-Zn deposit. |
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