| 晋北前寒武纪铁矿床组合、成矿系列及其演化的地质、地球化学特征 |
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| 引用本文： | 杨敏之.晋北前寒武纪铁矿床组合、成矿系列及其演化的地质、地球化学特征[J].矿床地质,1982,1(2):15-27. |
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| 作者姓名： | 杨敏之 |
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| 作者单位： | 冶金部天津地质调查所 |
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| 摘 要： | 晋北前寒武纪地层层位划分、地层层序、基本构造特征等方面,前人已做过较多的工作。本文在五台、吕梁、雁北前寒武纪含铁岩系、铁矿床区域地质、矿区地质和地球化学工作基础上,从地质发展史、铁矿成矿物质来源、地壳物质演化上,确定了晋北前寒武纪铁矿床类型、铁矿床组合、成矿系列,讨论了晋北铁矿成矿区的划分和找矿方
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The combination, metallogenetic seres as well as geologic and geochemical characteristics of the evolution of the Precambrian iron deposits in northern Shanxi |
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| Abstract: | 1. The correlation of the iron-bearing strata, stratigraphic sequence, original rock formation type, volcanic eruption cycle as well as ore-bearing characteristics reveals that the Precambrian iron-bearing strata of northern Shanxi correspond to the middle-upper units of the Archean-Proterozoic greenstone belt formations elsewhere in the world, and consist from bottom to top of three metallogenic series: (1) tholeiite series; (2) calcalkaline-basalt series; (3) clastic sediments and claystone series. 2. From the geotectonic setting, lithofacies-palaeogeography, ore type, petrochemistry and element association, the author has had the impression that iron deposits in northern Shanxi, which were indiscriminately called "Anshan type iron deposits", belong to a certain set of iron deposit combination: magmatic deposits, volcanic-sedimentary deposits derived from adjacent sources and: those derived from distant sources, They all genetically related to the evolution of tholeiite-calc-alkaline basalt magma. 3. the Precambrian iron deposits in northern Shanxi show some directivity in their evolution with t/me and are characterized by certain combination in their spatial distribution, which has much to do with the crustal movement, the evolution stage and sequence of the crust during the Middle Archeozoic-Early Proterozoic eras. These facts have led the author to divide the territory of northern Shanxi into five iron metallogenic areas. |
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