The Age of the Natalka Orogenic Gold Deposit (U–Pb, 40Ar/39Ar, Re–Os constrain)

IF 0.9 4区地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Russian Journal of Pacific Geology Pub Date : 2024-01-30 DOI:10.1134/s1819714023060027

V. V. Akinin, A. V. Alshevsky, G. O. Polzunenkov, S. A. Sergeev, V. A. Sidorov

引用次数: 0

Abstract

Geological observations and U–Pb dating of zircons from intrusions of the Yana–Kolyma gold province constrain the age of orogenic gold deposits to the time interval between 150 ± 3Ma and 108 ± 1 Ma. The Natalka deposit is the largest key deposit in the gold province. We determined the age of mineralization as the Valanzhinian (136 ± 1 to 132 ± 2 Ma) by ⁴⁰Ar/³⁹Ar dating of muscovite and by Re–Os dating of arsenopyrite and native gold. There are no known manifestations of magmatism of this age in the province, therefore, we conclude that the formation of gold–quartz mineralization is very likely related to metamorphism and metasomatism triggered by regional-scale shear deformations.

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纳塔尔卡造山运动金矿床的年龄（U-Pb、40Ar/39Ar、Re-Os常数）

摘要对来自亚纳-科雷马金矿区侵入体的锆石进行的地质观察和 U-Pb 测定，将造山运动形成的金矿床的年龄限制在 150 ± 3Ma 到 108 ± 1 Ma 之间。纳塔尔卡矿床是该金矿区最大的关键矿床。我们通过对麝香石的 40Ar/39Ar 测定以及对砷黄铁矿和原生金的 Re-Os 测定，确定了矿化的年代为瓦兰日尼亚（136 ± 1 至 132 ± 2 Ma）。在该省没有已知的这一时代的岩浆活动，因此我们得出结论，金-石英矿化的形成很可能与区域尺度剪切变形引发的变质作用和变质作用有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Russian Journal of Pacific Geology 地学-地球科学综合

CiteScore

1.30

自引率

37.50%

发文量

审稿时长

>12 weeks

期刊介绍： Russian Journal of Pacific Geology publishes the results of research on the Earth crust and mantle composition and provides articles on the geological structure and patterns of distribution of mineral deposits in the Pacific Ocean, marginal seas and continental margins. It discusses the topics of stratigraphy, sedimentology, magmatic activity, and seismicity. The journal deals with the problems of lithosphere plates tectonics, and offers the results of neotectonic, geomorphological, geodesic, environmental and mining studies in the Pacific region. The journal accepts theoretical, methodical and philosophical articles covering general issues of geology, geophysics, geochemistry, geoecology and mining. The journal also publishes critical notes and comments, and reviews.