| 试论中国铅锌矿床类型及其基本特征 |
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| 引用本文： | 王育民.试论中国铅锌矿床类型及其基本特征[J].矿床地质,1983,2(1):21-29. |
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| 作者姓名： | 王育民 |
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| 作者单位： | 湖南省地质局 |
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| 摘 要： | 一、中国铅锌矿床分类的尝试为有利于指导找矿和矿床评价,矿床分类的基本原则应该是:(1)既不是成因分类亦不是工业分类,而是以成因为基础,以工业意义为主导的两者有机结合,统称为“中国铅锌矿床类型”。即对不同成因系统的铅锌矿,按影响不同工业意义矿床形成的主要控矿地质因素进行的具体分类;(2)以“多因成矿”观点指导矿床分类,从我国铅锌矿床的实际情况出发,既考虑岩浆热液成矿作用,亦重视层控或沉积改造等成矿作用的影响;(3)分类方
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A tentative discussion on types and main characteristics of lead-zinc ore deposits in China |
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| Abstract: | In order to raise the efficiency of ore-predicting and ore assessment, lead-zinc ore deposits of China have been classified in this paper into four main systems, twelve types and nineteen patterns. This classification proceeds from actual conditions of these deposits and takes into consideration comprehensively four essential factors: main sources of ore materials}ore-forming processes; major geologic factors governing ore-formation and economic value of the deposit. The following is a very brief summary of the main characteristics of the four ore systems: A. Ore deposits of hydrothermal system. Ores of this system are formed by the filling or replacement activities of hydrothermal solutions derived principally from crustal refusion and remelting migma. They develop in regions with overlying sedimentary strata of fold system bearing characteristics of miogeosyncline, and appear mostly in the vicinity of the contact zone between the intermediate-acidic granitoid and carbonate rocks mainly of Late Paleozoic era. Of these deposits, contact-replacement type is considered to have the highest economic value. It is mostly of large or medium size and rich in ore-metals, but rather complicated in form. B.Ore deposits of strata-bound system. Ores of this system develop along the rim of the paraplatform; their formation is ascribable to the sedimentation-transformation of eroded continental ore resources. They occur within some definite strata of the shallow-sea facies sedimentary formations belonging to the first period of both Early and Late Paleozoic era with seldom magmatic activities found in them. They are comparatively simple and stable, assuming stratiform or stratoid form. C. Ore deposits of volcanic system. They are formed by the action of volcanic hydrothermal solutions or volcanic sedimentation, the sources being the upper mantle magma. The deposits located in the fold system of the eugeosyncline occur mostly within the spilte-keratophyre format-on, whereas those located in the miogeosyncline occur mainly within the andesite formation of the continental volcanic series. D. Ore deposits of fracture system. Deposits of this system are formed by the lateral secretion filling, the material sources of which seem rather complicated. They are mostly found as veins within the crystalline folded basement regions. |
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