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首页> 外文期刊>Big Earth Data >Comparative study of big data of global adakites and mineralization-related granite in the Geza arc metallogenic belt, northwest Yunnan, Southwest China
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Comparative study of big data of global adakites and mineralization-related granite in the Geza arc metallogenic belt, northwest Yunnan, Southwest China

机译：滇西北格萨弧成矿带全球adakites和成矿相关花岗岩大数据的比较研究

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The Geza arc is an important part of the Sanjiang tectono-magmatic belt and is a newly discovered copper polymetallic ore concentration area in northwest Yunnan province, Southwest China. The area comprises numerous metal ore deposits, including one super-large deposit, three large deposits, etc. The formation of these deposits was closely related to intermediate–acidic magmatic intrusions. Based on previous studies, the “big data” analysis technique was used for a comparative study of large geochemical datasets of granite related to ore-formation in the Geza porphyry copper deposit and global adakites. As a result, 1313 element combinations and 127,765 overlap ratios were obtained. The results show that the Geza porphyry has similar geochemical characteristics to global adakites (the ratios of REE and Ga to major elements are in the range of global adakites). However, the Cu, Mo, and Zn contents of the porphyry are significantly higher than those of global adakites, and the porphyry may, therefore, represent an end-member of the global range of adakite composition. In addition, the geochemistry of adakites associated with the porphyry copper deposits overlaps in part with that of global adakites, although most of the data lie outside of the range of global adakites (i.e. low Mn/Cu, Sr/Cu, Na/Cu, and Zr/Cu values, and high Th/Cu, Ba/Cu, Na/Mo, Rb/Mo, Th/Mo, Ta/Mo, Ba/Mo, Mn/Zn, and Ba/Zn values). The samples with characteristics that deviate significantly from the geochemistry of global adakites show more advanced mineralization and alteration, and a stronger relationship with Cu and Mo mineralization. The results of geochemical data mining can be used as a prospecting indicator, and provide a new scientific basis for geological prospecting of the deep levels and periphery of the Geza Cu polymetallic ore belt.
机译：盖萨弧是三江构造岩浆带的重要组成部分，是云南西北部新发现的铜多金属矿集中区。该地区包括众多金属矿床，其中包括一个超大型矿床，三个大型矿床等。这些矿床的形成与中酸性岩浆侵入密切相关。基于先前的研究，“大数据”分析技术用于与Geza斑岩铜矿床和全球Adakite的成矿有关的大型花岗岩地球化学数据集的比较研究。结果，获得了1313个元素组合和127,765个重叠率。结果表明，格扎斑岩的地球化学特征与全球adakites相似（REE和Ga与主要元素的比率在全球adakites的范围内）。但是，斑岩中的铜，钼和锌的含量明显高于全球钙质辉石，因此，斑岩可能代表了钙质辉石成分全球范围的末端。此外，与斑岩铜矿床相关的玄武岩的地球化学与全球玄武岩有部分重叠，尽管大多数数据不在全球玄武岩范围内（例如，低锰/铜，锶/铜，钠/铜，和Zr / Cu值，以及较高的Th / Cu，Ba / Cu，Na / Mo，Rb / Mo，Th / Mo，Ta / Mo，Ba / Mo，Mn / Zn和Ba / Zn值）。具有与全球Adakites地球化学显着不同的特征的样品显示出更高级的矿化和蚀变，并且与Cu和Mo矿化关系更强。地球化学数据的开采结果可以作为勘探指标，为Geza Cu多金属矿带的深部和外围的地质勘探提供新的科学依据。

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