| 张艳,魏平堂.Sedex型 Pb-Zn矿床氢氧同位素地球化学综述[J].矿产勘查,2012,3(3):374-378 |
| Sedex型 Pb-Zn矿床氢氧同位素地球化学综述 |
| O-H Isotope geochemistry of Sedex-type Pb -Zn ore deposits |
| 投稿时间：2011-09-08 |
| DOI： |
| 中文关键词: Sedex型矿床 氢氧同位素 地球化学 铅锌矿床 |
| 英文关键词: Sedex-type ore deposits hydrogen and oxygen isotopic geochemistry lead-zinc deposit |
| 基金项目:国家危机矿山专项(编号:20089943)和NSFC-云南联合基金项目(编号:U1133602)共同资助。 |
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| 中文摘要: |
| Sedex型铅锌矿床由于其规模大,数量多,储量大而占有重要地位,研究该类矿床成因及特征对于找矿具有重要指导作用。成矿物质和成矿流体的来源是矿床成因的关键,氢氧同位素的研究可示踪成矿物质以及成矿流体的来源。以往的研究均是对单一矿床的氢氧同位素进行研究,缺少同一类型矿床如文中的Sedex型矿床氢氧同位素示踪结果的对比和总结。现选取了我国典型的4个Sedex型矿床,在总结前人研究结果的基础上,对该类矿床氢氧同位素地球化学特征进行综述。认为4个矿床的成矿物质及成矿流体的来源极为相似,成矿物质来源均为深源,喷流沉积成岩后又经历过不同程度的热变质作用,成矿流体可能主要为大气降水、岩浆水的混合溶液,不排除有少量的海水、变质水参与成矿作用。因此,从氢氧同位素的地球化学特征来看,这4个矿床应属同一成因,即以沉积岩容矿的海底喷流沉积型(Sedex型)。 |
| 英文摘要: |
| Sedex is the most important deposit type in lead-zinc ore because of its large scale,great quantity and big storge . It plays an important guide in new ore deposits prospect studying genesis and characteristics of the deposit. The origin of ore forming element is the key aspect in metallogenic process. The composition of hydrogen and oxygen isotope is the tool to trace the source of ore substance. In the past , the hydrogen and oxygen isotope for a single ore deposits have been researched . It lacks contrast and summarized of the same type of deposit such as Sedex type deposit .Four typical Sedex type deposits in China have been selected in this paper,to summary and discuss the predecessor results of concentration hydrogen and oxygen isotope. The results show that the source of ore-forming materials derive from deep earth (deep crust or mantle) in above four deposit, and then they have experienced varying degrees of heat metamorphism. The ore-forming fluid may mainly mixture of meteoric water and magmatic fluid, and a small amount of sea water and metamorphic water. It is concluded that the 4 deposits belong to the same causes according to geochemical characteristics of the hydrogen and oxygen isotope ,in other words,it is the sedimentary exhalative deposits ( Sedex type). |
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