GENERATION CONDITIONS AND OCCURRENCE REGULARITIES OF THE BORATE IN THE PERMIAN HALOID BASIN WITHIN THE CASPIAN DEPRESSION

Proceedings of higher educational establishments Geology and Exploration ◽

10.32454/0016-7762-2017-2-28-35 ◽

2017 ◽

pp. 28-35

Author(s):

M. V. Solomon ◽

O. P. Goncharenko

Keyword(s):

East European ◽

Genetic Groups ◽

Sodium Calcium ◽

South West ◽

Deep Faults ◽

Boron Minerals ◽

Caspian Depression ◽

Actual Material

The actual material on the distribution of the borates in Permian boron-ore provinces in the East European basin is characterized. An analysis of the distribution of boron minerals in the saliferous layers of the Caspian Depression shows that their composition has varied significantly from magnesium (western part of the basin) to the magnesium-calcium and strontium (South-West) to sodium-calcium, and possibly sodium (South). The main sources of the boron were concentrated sea brine and presumably thermal solutions which could go to the basin along the system of the intersecting deep faults. Given the lithological association of borates to evaporite deposits in haloid basins, the four genetic groups of boron minerals have been identified: evaporite, supergene, «through», presumably volcanogenic-sedimentary.

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Typomorphic features of diamonds from ancient sedimentary thick layers of platforms’ central parts

Мінеральні ресурси України ◽

10.31996/mru.2020.3.13-19 ◽

2020 ◽

pp. 13-19

Author(s):

M. M. Zinchuk

Keyword(s):

Siberian Platform ◽

Upper Mantle ◽

Primary Sources ◽

Complex Investigation ◽

Upper Paleozoic ◽

Deep Faults ◽

Middle Paleozoic ◽

Actual Material ◽

Practical Conclusion ◽

Thick Layers

Basing on generalization of large actual material on complex investigation of diamond its characteristic in Upper Paleozoic and Mesozoic sedimentary thick layers of the Siberian platform is provided. Special attention is paid to the Central-Siberian sub-province, where it is convincingly shown that the area of development of individual diamond macro-associations is limited by a specific diamondiferous region, within which complexes of different in age terrigenous and coastal Upper Paleozoic and Mesozoic sediments are developed. Identified in some diamondiferous regions proximity of typomorphic features of diamonds in sedimentary thick layers of these ages testifies about formation of these collectors due to washout of more ancient productive layers or Middle Paleozoic primary sources. Polygeny of mineralogical associations of diamonds from different in age placers within some diamondiferous regions was noted, which may be successfully used when forecasting and prospecting primary sources of the mineral. Diamond and its tipomorphic features are one of the main criteria for forecasting and searching for root sources Materials on heterogeneity of the Viljujsko-Marhinska zone of deep faults with respect to productive kimberlite magmatism, which is associated with areals of the hard consolidated basement of the Archean age (Botuobinskij and Tjungskij cratons) obtained in the framework of medium scale forecast and search studies of typomophic features of diamonds have an important practical conclusion. The results of a study of the typomorphic features of diamonds from the most well-studied kimberlite bodies indicatle heterogeneities in the structure of the upper mantle even within the Central Siberian diamondiferous subprovince, especially with respect to the distributionof focirly rare coloured crystals (II, III and IV varieties) presumably of ecbgite genesis, associated with deep diamandiferous xenoliths of various composition. These varieties of diamonds are rare and accessory in kimberlite bodies, however their findings in rashes even in a single amount, can serve as a basis for localizing the territory of the search for indigenous sources. The analysis of typomorphic features of diamonds indicates the high prospectivity of placer oceurrences of the Central Siberian diamondiferous pronnce for the discovety of new highly productive kimberlite pipes.

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BIOSTRATIGRAPHY AND CORRELATION OF DEVONIAN DEPOSITS IN THE SOUTH-WEST SEGMENT OF THE EAST-EUROPEAN PLATFORM BY BRACHIOPODS

Geological Journal ◽

10.30836/igs.1025-6814.2021.3.228312 ◽

2021 ◽

pp. 74-84

Author(s):

O.Yu. Kotlyar

Keyword(s):

Middle Devonian ◽

East European Platform ◽

Black Shales ◽

The South ◽

Perfect Agreement ◽

Early Devonian ◽

East European ◽

South West ◽

Brachiopod Fauna

The main aim of the paper is to study the detailed distribution of the brachiopod fauna throughout the entire Devonian section from the Silurian-Devonian boundary at the Podilla region to the Devonian-Carboniferous boundary at the SW slope of the Dnipro-Donets Depression (DDD). The Devonian brachiopods (mainly Productids, Spiriferids and Rhynchonellids) of the south-west segment of the East-European Platform (EEP) are reviewed from the DDD, Volhyn-Podilla monocline (VPM) including the L’viv Paleozoic Trough, and Fore-Dobrogea Paleozoic Depression (FDPD). The faunas of these regions are mutually related and compared to the Devonian faunas of the EEP (Russia) and Pripyat’ Depression (Belarus). In recent years several paleontological investigations have broadened and deepened our knowledge of the Devonian biostratigraphy of Ukraine. Based on systematic studies of brachiopods from the SW segment of the EEP we recognize four successive faunas corresponding to four great marine transgressions — Early Devonian (Tiwer Series, the Monograptus uniformis Zone), Middle Devonian (Givetian Stage, the conodont varcus Zone), Late Frasnian (the conodont Upper rhenana — linguiformis Zone), and Early Famennian (the conodont triangularis-crepida Zone). The Early Devonian association includes Howellella angustiplicata, Plectodonta maria, and Daiya navicula and others which are similar to late Silurian brachiopods by their generic features (represented the genus common with the Upper Silurian). The Middle Devonian assemblages contain: Emanuella volhynica, Atrypa (Desquamatia) ventricosa, Chonetes sarcinulata, and Poloniproductus productoides at VPM sections (Givetian Stage, the varcus Zone), as well as Variatrypa sokolovae (Eifelian Stage), but in the DDD sections the impoverished association with Stringocephalus cf. burtini (Eifelian Stage) and Atrypa uralica (Givetian Stage) occur. The Late Frasnian association is represented by dominance of Theodossia tanaica, T. evlanensis, T. livnensis at all regions — VPM, DDD and FDPD (the Upper rhenana — linguiformis zones). The Early Famennian association is represented by ex Cyrtospirifer archiaci = Cyrtospirifer asiaticus and Cyrtospirifer ljachovichensis, Cyrtiopsis sp., Ptychomaletoechia zadonica, Iloerhynchus tichomirovi, Ardiviscus ex gr.herminae, Steinhagella annae etc. at DDD and by the same association plus Dmitria angustirostris at VPM (the triangularis-crepida zones). Brachiopods near the D-C boundary have been recorded so far from the black shales fossiliferous deeper water facies only in DDD: Spinocarinifera nigra, S. fallax, Sphenospira julii, Parallelora sp. (the Siphonodella praesulcata Zone). The result of our systematic study of productids, spiriferids, rhynchonellids, atrypids, and athyrids from Ukrainian sections are in perfect agreement with, and supplement to the previous investigations of Middle and Upper Devonian deposits at VPM and DDD, suggesting their important role for precising boundaries between the Devonian stages and horizons in SW segment of EEP. The essential role of brachiopods for the Devonian biostratigraphy and correlations with the East-European biozonation is confirmed.

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Genetic diversity of maize landraces from the South-West of France

10.1101/2020.08.17.253690 ◽

2020 ◽

Cited By ~ 2

Author(s):

Yacine Diaw ◽

Christine Tollon-Cordet ◽

Alain Charcosset ◽

Stéphane Nicolas ◽

Delphine Madur ◽

...

Keyword(s):

Genetic Diversity ◽

Snp Array ◽

Ex Situ ◽

The South ◽

Genetic Groups ◽

South West ◽

Tropical Germplasm ◽

Maize Genetic ◽

Maize Landraces ◽

Genetic Drifts

AbstractFrom the 17th century until the arrival of hybrids in 1960s, maize landraces were cultivated in the South-West of France, a traditional region for maize cultivation. A set of landraces were collected in this region between the 1950s and 1980s and were then conserved ex situ in a germplam collection. Previous studies using molecular markers on approx. twenty landraces fo this region showed that they belonged to a Pyrenees-Galicia Flint genetic group and originated from hybridization between Caribbean and Northern Flint germplasms introduced in Europe. In this study, we assessed the structure and genetic diversity of 194 SWF maize landraces to elucidate their origin, using a 50K SNP array and a bulk DNA approach. We identified two weakly differentiated genetic groups, one in the Western part and the other in the Eastern part. We highlighted the existence of a longitudinal gradient along the SWF area that was probably maintained through the interplay between genetic drifts and restricted gene flows, rather than through differential climatic adaptation. The contact zone between the two groups observed near the Garonne valley may be the result of these evolutionnary forces. We found only few significant cases of hybridization between Caribbean and Northern Flint germplasms in the region. We also found gene flows from various maize genetic groups to SWF landraces. Thus, we assumed that SWF landraces had a multiple origin with a slightly higher influence of Tropical germplasm in the West and preponderance of Northern Flint germplasm in the East.

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A ZEOLITE-SMECTITE LAYER OF TUFFS IN LOWER-VENDIAN TRAP-ROCKS OF SOUTH-WEST PARTS EAST-EUROPEAN PLATFORM, THEIR ORIGINS AND PROSPECT OF THE USE

Collection of Scientific Works of the Institute of Geological Sciences of the NAS of Ukraine ◽

10.30836/igs.2522-9753.2008.152450 ◽

2008 ◽

Vol 1 (0) ◽

pp. 104-111

Author(s):

V.G. Mel’nichuk

Keyword(s):

East European Platform ◽

East European ◽

Smectite Layer ◽

South West

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The social structure of the south-east European societies in the moddle ages – a linguistic view

Linguistica ◽

10.4312/linguistica.27.1.111-126 ◽

1987 ◽

Vol 27 (1) ◽

pp. 111-126

Author(s):

Sorin Paliga

Keyword(s):

Social Structure ◽

Middle Ages ◽

Political Structure ◽

Large Area ◽

East Europe ◽

East European ◽

South East Europe ◽

South West ◽

Starting Point ◽

The Social

The purpose of this paper is to review several terms spread over a quite large area in South-East Europe. The starting point of our investigation is the Romanian language understood as inheriting an important Thracian vocabulary, specifically referring to the social and political structure of the Early Middle Ages. The terms discussed are not exlusively Romanian. In fact, they reflect - roughly speaking - the ancient extension of the Thracian speakers, i.e. the present-day territories of Romania, Bulgaria, Soviet Moldavia and parts of South- and South-West ·ukraine, Slovakia, Hungary and Yugoslavia.

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Prospects for exploration of hydrogen fields in riftogene structures of platforms (the case of the Dnieper-Donets Aulacogene)

Geofizicheskiy Zhurnal ◽

10.24028/gzh.v43i5.244038 ◽

2021 ◽

Vol 43 (5) ◽

pp. 3-18

Author(s):

V. Shestopalov ◽

O. Lukin ◽

V. Starostenko ◽

O. Ponomarenko ◽

T. Tsvetkova ◽

...

Keyword(s):

Satellite Images ◽

Geophysical Methods ◽

Field Work ◽

East European ◽

Fine Grained ◽

Hydrogeological Parameters ◽

Local Depression ◽

Deep Faults ◽

Geophysical Surveys ◽

Ring Structures

This paper shows the prospect to find industrial-scale hydrogen accumulations in riftogenic structures of platforms using the example of the Dnieper-Donets Aulacogene, located in the southern part of the East European Platform. Within the Dnieper-Donets Depression, geological and geophysical methods indicate a significant number of deep faults and ring structures of volcanogenic and explosive origin promising increased hydrogen content. Possible locations of the most propitious areas of hydrogen concentration are associated with faults in rift systems and their nearest margins, as well as with explosive and volcanogenic ring structures with signs of modern activation. At a fine-grained level, the prospectivity of the area is determined not only by the specified structural relationship, but also by the set of geophysical characteristics (thermal, seismic, gravity, electrical conductivity, magnetic) and the corresponding geological and hydrogeological parameters. Areas for further more detailed investigations within the Sribne and other ring structures, Southern Near-Edge Fault, Northern Near-Edge Fault were identified based on the data on geological and geophysical materials, satellite images, and field work. We defined high-priority and low-priority territories. Areas for initial investigations using satellite images, gas sampling (hydrogen, helium, methane, etc.), primary geophysical surveys (with evaluation of intermediate reservoirs and cap rocks) were identified. The primary results can be used to plan pilot shallow drilling and wells sampling. The areas for priority deeper drilling and sampling are selected by the sum of results obtained and data comparison. The paper presents the results obtained 30 km east of Kyiv as an example of field assessment of H2 degassing in a local depression. The results show that hydrogen concentrations at depths of 0.45 to 1.5 m are near zero outside the local depression. The maximum values of H2 concentration (up to 3300 ppm 1.5 m deep) are characteristic of the point inside the depression.

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Paleomagnetism of terrigenous rocks of the Volynian series (Ediacaran) from Podolia (Ukraine)

10.5194/egusphere-egu21-1669 ◽

2021 ◽

Author(s):

Ievgen Poliachenko ◽

Semyon Cherkes ◽

Dmytro Hlavatskyi

Keyword(s):

High Temperature ◽

Low Temperature ◽

Geomagnetic Field ◽

Reverse Polarity ◽

East European ◽

Temperature Range ◽

High Temperature Component ◽

Terrigenous Rocks ◽

South West ◽

Temperature Component

We present the results of palaeomagnetic study of Ediacaran terrigenous rocks from the SW part of East European Craton (EEC), Podolia (Ukraine). Samples are represented by red tufits of Grushkinska suite by Volhynian series, which is comparable to the upper part of the Ediacaran age by the international stratigraphic scale. Samples for paleomagnetic studies were taken at the reference section of the Grushkinsky suite of the Volhynia series in the village of Grushka (48.45&#176;N 28&#176;E). A total of 50 oriented core samples were selected. For the entire collection of samples, the standard procedure for paleomagnetic studies was applied. The samples underwent stepwise temperature demagnetization. &#160;Demagnetization showed that all samples are completely demagnetized at a temperature close to 700&#176;C. The results of demagnetization showed that additionally to the viscous components of the magnetization released up to 200&#176;C, four more stable components of NRM are released: CLM-1&#8211;component, relatively low temperature, in the range of deblocking temperatures of 200&#8211;360&#176;C. It is characterized by south-south-west declination and negative inclination (D/I = 197.9/-28.6); CLM-2&#8211;component, is allocated in the same temperature range as component CLM-1 (200-360&#176;&#1057;), is characterized by south-south-west declination and positive inclination (D/I = 202.4/31); CMH&#8211;component, is strictly allocated in the range of unlocking temperatures of 590&#8211;630&#176;C. It is characterized by northwestern declination and positive inclination (D/I = 311/18.9); CH &#8211;component, a bipolar high-temperature component, is released in the temperature range of 650&#8211;700&#176;C. The middle direction of the forward and reverse polarity is characterized by north-north-west declination and positive inclination (D/I = 296.4/71.2). The directions of normal and reverse polarity of this component are closely antipodal and successfully pass the reversal test (&#947;/&#947;c = 7.85/8.82), class &#8220;B&#8221; in accordance with [McFadden & McElhinny, 1990].The coordinates of the virtual geomagnetic poles for the two low-temperature components, respectively, are located close to the Permian (&#934;/&#923; = -53.7/357.9) and Silurian part (&#934;/&#923; = -21.8/4.9) of the apparent polar wander path for the EEC [Torsvik et al., 2012]. The VGP, calculated from the middle-high-temperature component, is located in the Caribbean region (&#934;/&#923; = 33.8/271.4) and the VGP for the relatively high temperature component is located in the eastern part of the North Atlantic (&#934;/&#923; = -52.5/149.1) that close to the another paleomagnetic determinations with ages about 550 Ma and 570 Ma respectively for different parts of EEC.New data demonstrate the palaeomagnetic information content of the studied rocks and the possibility of their more detailed study in order to analyze anomalous palaeomagnetic data in the ediacaran and study the evolution of the Earth's geomagnetic field.The analysis of directions and poles indicates that the paleomagnetic results do not contradict the data on the extremely high variability of the geomagnetic field in the studied time interval.The new paleomagnetic determinations correspond to the previous results obtained by other authors for different regions of the East European platform, thereby supplementing them.

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Genetic diversity of maize landraces from the South-West of France

PLoS ONE ◽

10.1371/journal.pone.0238334 ◽

2021 ◽

Vol 16 (2) ◽

pp. e0238334

Author(s):

Yacine Diaw ◽

Christine Tollon-Cordet ◽

Alain Charcosset ◽

Stéphane D. Nicolas ◽

Delphine Madur ◽

...

Keyword(s):

Genetic Diversity ◽

Snp Array ◽

Ex Situ ◽

The South ◽

East Part ◽

Genetic Groups ◽

South West ◽

Maize Cultivation ◽

Maize Landraces ◽

Genetic Drifts

From the 17th century until the arrival of hybrids in 1960s, maize landraces were cultivated in the South-West of France (SWF), a traditional region for maize cultivation. A set of landraces were collected in this area between the 1950s and 1980s and were then conserved ex situ in a germplam collection. Previous studies using molecular markers on approx. twenty landraces from this region suggested that they belonged to a Pyrenees-Galicia Flint genetic group and originated from hybridizations between Caribbean and Northern Flint germplasms introduced to Europe. In this study, we assessed the structure and genetic diversity of 194 SWF maize landraces to better elucidate their origin, using a 50K SNP array and a bulk DNA approach. We identified two weakly differentiated genetic groups, one in the Western part and the other in the Eastern part of the studied region. We highlighted the existence of a longitudinal gradient along the SWF area that was probably maintained through the interplay between genetic drifts and restricted gene flows. The contact zone between the two groups observed near the Garonne valley may be the result of these evolutionnary forces. We found in landraces from the East part of the region significant cases of admixture between landraces from the Northern Flint group and landraces from either the Caribbean, Andean or Italian groups. We then assumed that SWF landraces had a multiple origin with a predonderance of Northern Flint germplasm for the two SWF groups, notably for the East part.

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