Abstract

The results of U‒Pb (ID-TIMS) geochronological studies of garnet from iron-bearing skarns of the Shalym deposit (Kondoma ore field, Gornaya Shoriya) are presented. Our data are the first direct estimation of the age of the formation of the iron deposit of the Kondoma ore field (499 ± 1 Ma). The formation of this deposit is related to the Middle to Late Cambrian subalkaline magmatism, which hasn’t previously been recognized within the Gornaya Shoriya fold areas (the western part of the Altai–Sayan fold area).

中文翻译：

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Gornaya Shoriya Kondoma 铁田矿床的第一年龄数据：石榴石 U-Pb (ID-TIMS) 测年结果

摘要

介绍了 Shalym 矿床（Kondoma 矿田，Gornaya Shoriya）含铁矽卡岩中石榴石的 U-Pb (ID-TIMS) 年代学研究结果。我们的数据是对 Kondoma 矿田铁矿形成年龄的首次直接估计（499 ± 1 Ma）。该矿床的形成与中晚寒武世亚碱性岩浆作用有关，此前在Gornaya Shoriya褶皱区（阿尔泰-萨彦褶皱区西部）尚未发现这种岩浆作用。