New Data on the Age of the Ozernoe Polymetallic Deposit (Western Transbaikalia)

IF 0.7 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS Lithology and Mineral Resources Pub Date : 2023-05-24 DOI:10.1134/S0024490223700074
O. R. Minina, I. V. Gordienko, B. B. Damdinov, V. S. Tashlykov, T. A. Goneger, V. S. Skripnikov, V. S. Lantseva, V. B. Khubanov, E. V. Kislov
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引用次数: 1

Abstract

The article presents results of the biostratigraphic and U–Pb geochronological (detrital zircon) studies of the volcanoterrigenous lacustrine member of the upper subformation (Lower Paleozoic Oldynda Formation), which contains polymetallic massive sulfide ores of the Ozernoe deposit (Kurba–Eravna ore district, western Transbaikalia). The first, second, and “crystalline tuff” horizons of the first ore-bearing level of the Ozernaya member were studied. It is represented by an alternation of tuffs, calcareous, siliceous, carbonaceous tuffites, pelitomorphic limestones, calcareous gravelstones with interlayers and lenses of mineralized tuffaceous conglobreccia and layers of banded siderite pyrite ores. For the first time, bryozoans, algae, and palynoflora were recorded in calcareous tuffaceous siltstones and limestones of the second and “crystalline tuff” productive horizons. These data indicate the Early Carboniferous (Tournaisian) time of sediment accumulation. Results of the U–Pb geochronological studies of detrital zircons from the mineralized tuffaceous conglobreccia of the third productive horizon suggest that the lower boundary of rock formation is not older than Late Cambrian.

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外贝加尔湖西部Ozernoe多金属矿床时代的新资料
本文介绍了外贝加尔西部Kurba-Eravna矿区Ozernoe矿床上亚组(下古生界Oldynda组)火山陆源湖段含多金属块状硫化物矿石的生物地层学和U-Pb年代学(碎屑锆石)研究结果。对奥泽纳亚段一含矿层的第一、第二和“结晶凝灰岩”层位进行了研究。以凝灰岩、钙质、硅质、碳质凝灰岩、泥晶灰岩、钙质砾石、矿化凝灰质长角砾岩的夹层和透镜体以及带状菱铁矿黄铁矿矿石层为代表。苔藓虫、藻类和孢粉植物首次被记录在第二和“结晶凝灰岩”生产层的钙质凝灰岩粉砂岩和石灰石中。这些资料反映了早石炭世(图尔奈世)沉积的时代。对第三产层矿化凝灰质砾岩碎屑锆石的U-Pb年代学研究结果表明,地层下界年龄不超过晚寒武世。
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来源期刊
Lithology and Mineral Resources
Lithology and Mineral Resources 地学-地球化学与地球物理
CiteScore
1.30
自引率
37.50%
发文量
29
审稿时长
>12 weeks
期刊介绍: Lithology and Mineral Resources is an international peer reviewed journal that publishes articles on a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is given to comparison of ancient sedimentary rock and ore formation with present-day processes. The major part of the journal is devoted to comparative analysis of sedimentary processes on the continents and in oceans, as well as the genetic aspects of the formation of sedimentary and hydrothermal–sedimentary mineral resources. The journal welcomes manuscripts from all countries in the English or Russian language.
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