Vestnik of geosciences最新文献_第4页

Metabasites along the Lunvozh river (Middle Timan): petrography, mineralogy, petrochemistry 伦沃日河（中提曼河）沿岸的玄武岩：岩石学、矿物学、岩石化学

Vestnik of geosciences Pub Date : 2023-12-08 DOI: 10.19110/geov.2023.10.3

A. Shmakova

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The peculiarities of the framboidal pyrites of the Mikheev porphyry copper deposit (Southern Ural) 米赫耶夫斑岩铜矿床（南乌拉尔）框架黄铁矿的特殊性

Vestnik of geosciences Pub Date : 2023-12-06 DOI: 10.19110/geov.2023.9.2

Lyubov' Leonova, O. Azovskova, E. Soroka

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Geochemistry of organic matter of natural bitumen in the section of the Kozhva river (Timan-Pechora province) 科日瓦河段（季曼-佩乔拉省）天然沥青有机物地球化学

Vestnik of geosciences Pub Date : 2023-12-06 DOI: 10.19110/geov.2023.9.5

O. Valyaeva, N. Ryabinkina

{"title":"Geochemistry of organic matter of natural bitumen in the section of the Kozhva river (Timan-Pechora province)","authors":"O. Valyaeva, N. Ryabinkina","doi":"10.19110/geov.2023.9.5","DOIUrl":"https://doi.org/10.19110/geov.2023.9.5","url":null,"abstract":"The results of detailed geochemical studies of natural bitumen in the section of the Kozhva River of the Timan-Pechora province, localized in the dolomites of the Kamensk formation of the Upper Famenian, are presented. It is established that bitumen is allochthonous. This is quite understandable from a geological point of view: the formation of bitumen manifestations is associated with the vertical migration of hydrocarbons (HC) in the zone of the Pripechorsky deep fault, resinous-asphaltene components predominate in the bitumen group composition. Gas chromatography and gas- chromatography-mass spectrometry proved that bitumen underwent intensive bacterial degradation, which led to the loss of n-alkanes and isoprenoids, steranes and partially hopanes. Tricyclanes of composition C19-C25, tetracyclane C24 and «geohopanes» with configuration 17α(H)21β(H) of composition C27 (Ts, Tm) and C29 were identified on mass chromatograms of m/z 191. It was found that tricyclanes predominate. On chromatograms according to m/z 177, 25-norhopane of the composition C28 was identified. Series 25-norhopane series was observed. The isotopic composition of carbon of individual fractions is characteristic of sapropel OM and is similar to the ICC of the previously studied bitumen of the Voya deposit.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138595564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Fossil bones of the Miocene-Holocene camels of Eurasia (Russia): mineralogical and geochemical properties and ecological reconstructions 欧亚大陆（俄罗斯）中新世-全新世骆驼骨骼化石：矿物学和地球化学特性及生态重建

Vestnik of geosciences Pub Date : 2023-12-06 DOI: 10.19110/geov.2023.9.1

V. Silaev, V. Titov, A. Tesakov, V. Filippov, E. Vasil'ev, I. Smoleva, S. Shanina, Dar'ya Kiseleva, A. Khazov, B. Makeev, N. Soloshenko, T. Okuneva

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Comparative characteristics of diaplectic and melt silicate glasses of the Kara astrobleme 卡拉天体二折射玻璃和熔融硅酸盐玻璃的比较特性

Vestnik of geosciences Pub Date : 2023-12-06 DOI: 10.19110/geov.2023.9.4

A. Zubov, T. Shumilova, S. Isaenko

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The nature of spheroidal gold of the Middle Kyvvozh placer in the Middle Timan 中提曼地区中基伏沃日（Kyvvozh）块状矿床球状金的性质

Vestnik of geosciences Pub Date : 2023-12-06 DOI: 10.19110/geov.2023.9.3

M. Sokerin, Yu. Glukhov, Renat Shaybekov, B. Makeev, S. Zorina

{"title":"The nature of spheroidal gold of the Middle Kyvvozh placer in the Middle Timan","authors":"M. Sokerin, Yu. Glukhov, Renat Shaybekov, B. Makeev, S. Zorina","doi":"10.19110/geov.2023.9.3","DOIUrl":"https://doi.org/10.19110/geov.2023.9.3","url":null,"abstract":"A comprehensive mineralogical study of 13 samples of spheroidal gold from schlich concentrates of the Middle Kyvvozh gold placer, which is part of the Kyvvozh gold placer field located in the central part of the Volsk-Vym ridge of the Middle Timan, was carried out. The presence of both natural and technogenic gold in concentrates was established. Natural placer spheroidal gold is characterized by a worn surface with oxide films and the development of a high-grade corrosion rim. Technogenic gold spheroids have a polygonal-mosaic tuberculate-pitted or smooth surface, the presence of aluminosilicate glasses and slags in the form of crusts or inclusions in the matrix, the presence of mineral inclusions and impurities of platinum group metals, tin and lead, which are not characteristic of native gold. Natural spheroids were formed by natural smoothing in the water flow during the formation of the placer. The formation of technogenic spheroids is associated with the impact of high-temperature plasma on the concentrate enriched in placer gold and platinoids, which occurs during electric welding undertaken during the repair work of the flushing devices. The results of the study should help to avoid errors in the interpretation of the genesis of such gold and, as a result, in determining the nature of the primary sources of placers.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"31 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138595035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0