Vestnik of geosciences最新文献_第2页

Influence of aquatic environmental factors on mineralization of cyanobacteria and green algae (Komi Republic) 水生环境因素对蓝藻和绿藻矿化的影响（科米共和国）

Vestnik of geosciences Pub Date : 2024-04-24 DOI: 10.19110/geov.2024.2.3

Tat'yana Mityusheva, Valentina Katkova, V. Filippov, E. Tropnikov, E. Patova

{"title":"Influence of aquatic environmental factors on mineralization of cyanobacteria and green algae (Komi Republic)","authors":"Tat'yana Mityusheva, Valentina Katkova, V. Filippov, E. Tropnikov, E. Patova","doi":"10.19110/geov.2024.2.3","DOIUrl":"https://doi.org/10.19110/geov.2024.2.3","url":null,"abstract":"This article describes crystallization formed in the exogenous mucous sheath of phototrophic microorganisms living in the surface waters of the south area of the Komi Republic. The mineralization of colonies of cyanobacteria of the Gloeotrichia sp. and green algae Chaetophora elegans was studied. The waters of rivers in the Northern Dvina basin have been studied as habitats for the microorganisms. They have a different composition: HCO3 Ca–Mg, typical for the taiga zone of a temperate continental climate; SO4–HCO3 Ca–Mg and Cl–Na (in the zone of technogenic pollution). Using the example of these neutral — weakly alkaline ultrafresh — salty (0.2—2.8 g/L) waters, it is shown that the geochemistry of the aquatic environment is one of the most important factors influencing the minerogenesis. Calcite, vaterite, quartz and halite were identified in dried colonies of microorganisms within the extracellular polymeric substance using the methods of X-ray diffractometry, electron microscopy, microprobe analysis and IR spectroscopy. The morphological features of microminerals are presented depending on the type of microorganisms. Calcium carbonate crystals and aggregates are formed within the exogenous mucous sheath of algae and cyanophytes. The carbon isotope composition of carbonates (13C –7.5 and –3.8 ‰ PDB) indicates their organic nature. The formation of minerals, morphological features of crystals and the degree of biomineralisation of colonies of phototrophic microorganisms are conditioned by the physicochemical parameters of the aquatic environment. The possibilities of chemogenic precipitation of carbonates from the studied natural waters were assessed.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"46 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140663223","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

Mineralogical and geochemical properties of the “Moraine” complex of Holozene sediments in Lake Nizhneye (East Antarctica) as a source of new genetical information 作为新基因信息来源的下涅耶湖（东南极洲）全新沉积物 "冰碛 "复合体的矿物学和地球化学特性

Vestnik of geosciences Pub Date : 2024-04-24 DOI: 10.19110/geov.2024.2.1

V. Silaev, V. Zernitskaya, V. Filippov, I. Smoleva, G. Ignatjev, B. Makeev, A. Khazov, Yu. Giginyak, A. Gajdashov

引用次数: 0

Conditions for the formation of ore-bearing Lower-Middle Paleozoic sedimentary formations of the Chatkal-Qurama Mountains of Uzbekistan 乌兹别克斯坦恰特卡尔-古拉玛山脉中下古生代含矿沉积层的形成条件

Vestnik of geosciences Pub Date : 2024-04-24 DOI: 10.19110/geov.2024.2.2

M. Munduzova

{"title":"Conditions for the formation of ore-bearing Lower-Middle Paleozoic sedimentary formations of the Chatkal-Qurama Mountains of Uzbekistan","authors":"M. Munduzova","doi":"10.19110/geov.2024.2.2","DOIUrl":"https://doi.org/10.19110/geov.2024.2.2","url":null,"abstract":"The article describes stratiform lead-zinc and polymetallic deposits in Paleozoic sedimentary rocks of the southwestern Tien Shan of the Chatkal-Qurama Mountains using rhythmostratigraphic analysis developed by professor at Tashkent State University V. I. Popov (Popov et al., 1963; Popov, 1980). Tectonic movements play a major role in the formation of new structural elements of the lithosphere and the earth's surface. Large tectonic movements spread over large areas and become regional tectonic rhythms. Considerable phases of tectonic movements were divided into smaller phases. We observed the change in formational composition: the boundary and beginning of the rhythm series were dominated by clastic facies of mobile shallow water (surf-clastic), closer to the beltv — quiet-water or stagnant (Popov et al., 1963; Popov, 1980). We stadied the northwestern slopes of the Qurama ridge in the upper reaches of the Karakiya River. Lithological-facies sections and maps of actual materials were made in the study areas. Early Silurian sediments of the were formed in the conditions of a quiet-water (central-sedimentary) shallow-water basin, zones under the influence of bottom currents (bottom current) and deltaic (underwater deltaic) facies belt; Devonian-Lower Carboniferous sediments were accumulated in wave surf zone, bay (shallow-flood belt) and underwater delta (underwater delta belt). \u0000Three ore-bearing units with high contents of gold, copper, lead, zinc and a number of other metals were identified in the Lower Silurian terrigenous formations. Black dolomites of the stagnant zone of a shallow-water bay (shallow-bay facies) with high contents of lead were identified in the Devonian sedimentary formations. The confinement of increased concentrations of polymetals to certain layers and units of sedimentary dolomite rocks enriched in organic matter indicates that the accumulation of dispersed ore matter is syngenetic to the sedimentation process.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"58 39","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140661787","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

From the find of coal pebbles to the discovery of deposits (the 100th anniversary of the Pechora coal basin) 从发现煤卵石到发现矿藏（佩乔拉煤盆地 100 周年纪念）

Vestnik of geosciences Pub Date : 2024-04-24 DOI: 10.19110/geov.2024.2.4

I. Astakhova

引用次数: 0

Stages of formation of quartz-albite-allanite-fuchsite veins at the Chudnoe Au-Pd deposit (Subpolar Urals) Chudnoe 金-钯矿床（次极地乌拉尔）石英-黑云母-黑云母-富长石矿脉的形成阶段

Vestnik of geosciences Pub Date : 2024-04-23 DOI: 10.19110/geov.2024.1.1

S. Onishchenko, N. Sokerina, Sergey Kuznetsov, S. Isaenko, E. Tropnikov

{"title":"Stages of formation of quartz-albite-allanite-fuchsite veins at the Chudnoe Au-Pd deposit (Subpolar Urals)","authors":"S. Onishchenko, N. Sokerina, Sergey Kuznetsov, S. Isaenko, E. Tropnikov","doi":"10.19110/geov.2024.1.1","DOIUrl":"https://doi.org/10.19110/geov.2024.1.1","url":null,"abstract":"The gold-palladium mineralization of the Chudnoe deposit is represented by mineralized veined zones in fractured and brecciated rhyolites of the Riphean-Vendian age. Native gold and palladium minerals are concentrated mainly in veins of Cr-containing muscovite (fuchsite), in which allanite is present in small amounts; quartz, albite, calcite, potassium feldspar, titanite, apatite, zincochromite and other minerals are also found. Veins of allanite-albite-quartz composition are found in ore zones, in some cases containing abundant fuchsite secretions. It has been established that quartz-albite-allanite-fuchsite and other fuchsite-containing veins are the result of the superposition of quartz-albite vein execution on previously formed gold-bearing fuchsite veins. Quartz-albite vein material fills central parts of the combined veins and cements fragments (xenoliths) of fuchsite, while in some cases part of the gold was redeposited and fixed in the quartz-albite part of the veins. Based on the study of the decomposition structures of solid solutions in native gold, it was previously established that the temperature of gold formation in fuchsite veinlets exceeded 220 °C. The deposition temperature of the main part of the quartz-albite veins was noticeably lower. The homogenization temperature of fluid inclusions in vein minerals (quartz, albite, allanite, calcite) was mainly in the range of 96—168 °C, solutions were enriched with magnesium and calcium chlorides. Under these conditions, allanite, apatite, monazite, xenotime, and molibdosheelite were formed and redeposited, and fuchsite recrystallized.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"132 28","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140669168","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

Groundwater of Middle Jurassic deposits of the southern regions of the Komi Republic 科米共和国南部地区中侏罗纪沉积层的地下水

Vestnik of geosciences Pub Date : 2024-04-23 DOI: 10.19110/geov.2024.1.3

Yuliya A. Koksharova, O. Amosova

引用次数: 0

Seismic events in the Vorkuta coal industrial district in 2023 2023 年沃尔库塔煤炭工业区的地震事件

Vestnik of geosciences Pub Date : 2024-04-23 DOI: 10.19110/geov.2024.1.4

N. Noskova, F. Verkholantsev, Vladimir Asming, Natalia Vaganova, I. Popov

{"title":"Seismic events in the Vorkuta coal industrial district in 2023","authors":"N. Noskova, F. Verkholantsev, Vladimir Asming, Natalia Vaganova, I. Popov","doi":"10.19110/geov.2024.1.4","DOIUrl":"https://doi.org/10.19110/geov.2024.1.4","url":null,"abstract":"In 2023, regional seismic stations recorded 25 seismic events in the Vorkuta coal industrial district of the Komi Republic, with a local magnitude ML from 1.8 to 2.8. A significant contribution to the detection of weak, ML ≤ 2, events was made by data obtained from the temporary seismic station of the IG FRC Komi SC UB RAS, installed as part of expeditionary work in the summer of 2023 in the Polar Urals. \u0000Among them the seismic event on August 1, 2023, which had a macroseismic effect, is of particular interest. Residents of several districts of Vorkuta felt tremors similar to an earthquake. Seismic records from 5 stations with epicentral distances from 40 to 1070 km were processed. The following parameters of the epicenter were obtained: t0 = 18:39:07, 67.529N, 64.001E, h = 0 km, Rminor = 3.9 km, Rmajor = 6.7 km, AzMajor = 90°, Kp = 9.0, ML = 2.8, Ms = 2.35. The instrumental epicenter of the event is located in Vorkuta, near the mine field of the Vorkuta mine. We classified the seismic event as a rock burst. Macroseismic intensity calculated in accordance with the Seismic intensity scale-2017 using 57 questionnaires and 163 definitions of sensor categories was I0 = 4.73 ± 0.02. The calculated value of the macroseismic depth of the source was H = 0.5 ± 0.4 km, which corresponds to the instrumental definition and to the range of depths of mine workings of the Vorkuta coal deposit.","PeriodicalId":23572,"journal":{"name":"Vestnik of geosciences","volume":"58 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140666898","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

Geological structure of Quaternary sediments in the lower Pechora river valley 佩乔拉河谷下游第四纪沉积物的地质结构

Vestnik of geosciences Pub Date : 2024-04-23 DOI: 10.19110/geov.2024.1.2

L. Andreicheva

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From teaching experience. XIII. Name of crystal polyhedron. On the occasion of the 130th anniversary of A. F. Losev's birth and the 100th anniversary of the «Philosophy of the Name» 教学经验。XIII.水晶多面体的名称纪念 A. F. 洛舍夫诞辰 130 周年和 "名称哲学 "100 周年

Vestnik of geosciences Pub Date : 2024-04-23 DOI: 10.19110/geov.2024.1.5

Yuriy Voytehovskiy

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Oxidation of oil shale kerogen by alkaline potassium permanganate 碱性高锰酸钾对油页岩角质的氧化作用

Vestnik of geosciences Pub Date : 2024-02-21 DOI: 10.19110/geov.2023.12.6

N. Burdelnaya, Ya. Sennikova, Dmitry Bushnev

引用次数: 0