17 中国钨矿床地质特征、类型及其分布.docVIP

中国钨矿床地质特征、类型及其分布 内容提要：中国钨矿床以其产地多、规模大、品位高、伴生元素复杂为特征。文中提出了钨矿床类型划分的依据，并将中国钨矿床成因划分为三类、四个亚类、20个型。把广布的中国钨矿分为南北两部16个成矿带。 主题词：中国钨矿 地质特征 矿床类型 矿带划分 Abstract The first tungsten deposit in china was discovered in 1908, and since the end of 1920s, the annual output of tungsten in china has averagely made up 40 percent of the total annual tungsten output of the world. The basic geological characteristics of china’s tungsten deposits might be summarized as wide in distribution ,numerous in production place, large in size ,rich in grade, complex in associated components and varied in ore deposit types .In addition, china’s tungsten resources are famous in the world for its highly developed quartz vein type tungsten deposits. The classification of tungsten deposits depends mainly on the research level of their geneses. Polynary mentallogenesis should serve as the major basis for this classification, and whether the ore-prospecting prognostic information can be provided or not is also a principle for classification China’s tungsten deposits can be classified into rock-controlled tungsten deposits and stratabound ones. The former is further divided into two subclasses, i.e., crust-derivved tungsten deposits and tungsten deposits from mixed crust-mantle sources, and the latter also into two subclasses , namely, reworked tungsten depositsand superimposed ones, with the addition of modern supergene tungsten deposits. Finally, these deposits are divided into a number of types according to ore-forming process.A simplified classification is give in the paper. Tungsten deposits are distributed all over 29 provinces, municipalities and autonomous regions of China. With 30? north latitude as the boundary, this paper divides China into North China and South China and differentiates sixtenn metallogenic belts which are described in detail. 我国钨矿发现于1908年（西华山），从20年代末到现在，钨矿年产量平均占世界总产量的40%左右。近年来各级钨矿产品如高级钨砂、仲钨酸铵、钨铁、碳化钨硬质合金等的质量日益提高，堪列世界前茅。本文将对中国钨矿产出的地质特征、矿床类型及其分布，作一概括综述。不当之处，敬请批评指正。 一.中国钨矿床地质特征 中国钨