| 秦岭地区主要金属矿床成矿系列的划分及区域成矿规律探讨 |
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| 引用本文：.1994.Metallogenic series of main ore deposits and regional metallogeny in the Qinling area[J].Mineral Deposits,13(4):289~298 |
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| 基金项目:国家自然科学基金和“八五”秦岭重大项目（49290100） |
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| 中文摘要:秦岭造山带是我国著名的陆内造山带，也是一个重要的构造-成矿带。本文主要以秦岭地区的内生金属矿床为研究对象，一些重要的外生金属矿床也包括在其中，并按照成矿系列的学术思想将其划分为21个矿床系列。作者在正文中将这些成矿系列按时代顺序排列。对于每一成矿系列形成的构造环境和主要成矿地质作用进行了简要阐述。根据对成矿系列的分析研究，探讨了秦岭地区的区域成矿规律及其与构造演化的相关性。指出长期强烈的构造运动和构造活动随时-空的差异性是导致该区独特成矿特色的主导因素。 |
| 中文关键词:金属矿床 成矿系列 区域成矿规律 秦岭地区 |
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| Metallogenic series of main ore deposits and regional metallogeny in the Qinling area |
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| Abstract:Twenty-one metallogenic series of main Ore deposits from the Late Archean to the Mesozoic in the Qinling area have been distinguished, comprising one in the Late Archean, four from the Middle to the Late Proterozoic, three from the Late Proterozoic to the Lower Paleozoic, three in the Caledonian(including the Late Caledonian-Early Hercynian), one in the Hercynian, six in the Mesozoic and two whose metallogenie epochs are unidentified. Metallogenic processes of ore-forming elements such as Mo, Au, Ag, Pb, Zn, Hg, Sb, Nb, REE and U mostly took place in the area, and there is a wide variety of genetic types of deposits. Most of the metallogenic series of deposits are related genetically to magmatic intrusions and eruptions, with early (from the Late Archean to the Lower Paleozoic)ones to the basic-ultrabasic intrusions and the bimodality pattern marine volcanism resulting from spreading rifting and deep fauIting and the late (from the Late Paleozoic to the Mesozoic) ones to intermediate-acid intrusions and terrestrial volcanism, generated by conversion of tectonic environments from ocean to intracontinent. The ore-forming materials were derived mainly from deep-seated sources, showing that the tectonomagmatic activities reached very great depths. There are two important metallogenic ages: one is the Middle Proterozoic-Early Paleozoic during which the metallogenetic processes were related to the spreading rifting; the other, related to the intracontinental subduction, is the Mesozoic. The Early Proterozoic metallo genesis was quite weak. The regional metamorphism and high-pressure dynamo-metamorphism exerted remarkable effects on the formation of iron, gold, uranium, ruffle and blue asbestos ore deposits. Sedimentary metallogeneses, which must have brought about the formation of iron, manganese, lead, zinc and vanadium ore deposits, occurred largely in the Late Axchean, the Paleozoic and the Mesozoic. There are metallogenetically marked differences between the eastern Qinling and the western Qinling divided by longitude 106°E as a boundary. The distributions of deposits are mostly controlled by the EW-NWW striking structures, on which the Yanshanian NE-striking structures were superimposed later. Metallogeneses in the area are characterized by inheritance, polyphases, polysources and polygenesis. Many times of strong tectonic movements and their distinction in time and space played a dominant part in the formation of the unique metallogenic features in the Qinling area. |
| keywords:ore deposit, metallogenic series, regional metallogeny, Qinting area |
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