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Lead isotope mapping of galena from base metal deposits in the southern Korean Peninsula

机译：南朝鲜半岛南部金属矿床的Galena的主要同位素映射

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The purpose of this study is to investigate the differences in sources of discrete four zones that are represented by the lead isotope map of metal mines using galena samples. The lead isotope map has been constructed based on 119 galena samples from 38 metal mines in the southern Korean Peninsula, together with previously published data, using spatial and zoning distribution analysis. The spatial pattern of Pb-206/Pb-204 ratio shows relatively dense distribution with highest value at the northeastern region, while Pb-207/Pb-204 and Pb-208/Pb-204 ratios are the lowest at the southeastern region. These results indicate possible subdivision of the lead isotope maps based on geotectonic subdivisions and geographical locations of the Korean Peninsula. This subdivision has been checked by linear discriminant analysis (LDA). The range of lead isotopic composition for zone 1 has fairly homogeneous values (Pb-206/Pb-204 = 18.156-18.591, Pb-207/Pb-204 = 15.482-15.644, and Pb-208/Pb-204 = 37.870-38.768), and are geographically similar to the Gyeongsang Basin. Lead isotopic compositions of zone 2 show the highest ratios (Pb-206/Pb-204 = 18.625-20.483, Pb-207/Pb-204 = 15.708-16.068, Pb-208/Pb-204 = 37.734-40.463) in the southern Korean Peninsula, that are geographically corresponding to the Taebaeksan Basin and the northeastern Yeongnam Massif. Relatively lower values (Pb-206/Pb-204 = 17.149-17.817, Pb-207 /Pb-204 = 15.497-15.731, Pb-208 /Pb-204 = 37.847-39.773) along the western Gyeonggi Massif are grouped as zone 4, while the rest of the areas, including the Okcheon metamorphic belt, most of the Gyeonggi Massif, and the Yeongnam Massif, might represent zone 3. The results clearly indicate the possible differences in the source reservoirs that are similar to the geotectonic provinces of the Korean Peninsula.
机译：本研究的目的是调查使用Galena样品的金属矿山的铅同位素地图所代表的离散四个区域的差异。通过南朝鲜半岛的38个金属地雷的119个Galena样本构建了铅同位素地图，使用空间和分区分布分析以及以前公布的数据。 PB-206 / PB-204比率的空间模式显示出在东北地区的最高值的相对密集的分布，而PB-207 / PB-204和PB-208 / PB-204比率是东南部地区最低的比率。这些结果表明，基于朝鲜分立的细分和朝鲜半岛的地理位置的引线同位素地图可能的细分。通过线性判别分析（LDA）检查了该细分。区域1的铅同位素组合物的范围具有相当均匀的值（PB-206 / PB-204 = 18.156-18.591，PB-207 / PB-204 = 15.482-15.644和PB-208 / PB-204 = 37.870-38.768 ），并且在地理上类似于庆州盆地。区域2的铅同位素组合物显示出南部的最高比率（PB-206 / PB-204 = 18.625-20.483，PB-207 / PB-204 = 15.708-16.068，PB-208 / PB-204 = 37.734-40.463）朝鲜半岛，在地理上对应于跆拳道盆地和东北涌南部的地理位置。沿着西部京畿道沿西部的较低的值（PB-206 / PB-204 = 17.149-1731，PB-208 / PB-204 = 37.847-39.773）分组为4区虽然其余的区域，包括okcheon变质带，大部分京畿道肿块，以及yeongnam massif，可能代表区3.结果清楚地表明了与地理位置省份相似的源储层的可能差异朝鲜半岛。

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