Karpinsky Russian Geological Research Institute

Saint Petersburg, Russia

Karpinsky Russian Geological Research Institute

Saint Petersburg, Russia
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Andreichev V.L.,Russian Academy of Sciences | Soboleva A.A.,Russian Academy of Sciences | Dovzhikova E.G.,Ukhta State Technical University | Miller E.L.,Stanford University | And 4 more authors.
Doklady Earth Sciences | Year: 2017

Upper Precambrian basement of the Pechora Basin that is located between the Urals and Timan and is a part of the Pechora plate lies beneath 1–7 km of Ordovician-Cenozoic sediment cover. On the base of geophysical data and drilling the basement of the Pechora plate is subdivided into the Timan crustal block and the Bolshezemel crustal block which differ by composition and the character of magmatism. The boundary between the crustal blocks is a system of deep faults called the Pripechora and Ilych-Chikshino faults that strike in a northwestern direction, extending from the Urals to the Pechora Sea. Granitoids of Charkayu complex which were penetrated by several deep boreholes in Pripechora fault zone are interpreted as suprasubduction (island arc and collision) magmas associated with the Timan orogeny. First U–Pb dating (SIMS, using SHRIMP-II and SHRIMP-RG) of zircons from granitoids indicate that granitoid magmatism which accompanied the final stages of the Timanide orogeny occurred in the Late Vendian about 555–544 Ma. The age of zircons from granites of the 1-Charkayu borehole is 544 ± 6 Ma, from granites of 1-East Charkayu borehole is 545 ± 5 Ma, and from granodiorites of 1-South Charkayu borehole is 555 ± 2 Ma. © 2017, Pleiades Publishing, Ltd.

Biakov A.S.,Russian Academy of Sciences | Shpikerman V.I.,Karpinsky Russian Geological Research Institute | Vedernikov I.L.,Russian Academy of Sciences | Tolmacheva E.V.,Russian Academy of Sciences
Stratigraphy and Geological Correlation | Year: 2017

The Regional Stratigraphic Scale (RSS) of the Permian deposits in northeastern Russia represents the only complete stratigraphic succession of Permian marine deposits distinguished in Russia, which serves as a standard at the correlation of Permian deposits of all regions of the eastern part of the Boreal Biogeographic Superrealm. However, a high level of faunistic endemism makes it extremely difficult to correlate directly stratons of the RSS with stages of the International Stratigraphic Scale (ISS) of the Permian deposits. The first U–Pb SIMS age datings of zircons from felsic tuffs of the Omchak Formation of the Ayan-Yuryakh Anticlinorium (the lower part of the Permian Khivachian Horizon of the RSS of northeastern Russia) allowed us to obtain the important reference level for the Upper Permian subdivision of the Permian RSS. The zircon age of 257.1 ± 3.0 Ma is in good agreement with the stratigraphic position of the studied sample, which makes it possible to correlate the surrounding deposits with the Wuchiapingian Stage of the Permian deposits in the International Stratigraphic Scale. © 2017, Pleiades Publishing, Ltd.

Brodskaya R.L.,Karpinsky Russian Geological Research Institute | Golubev E.A.,Russian Academy of Sciences | Isaenko S.I.,Russian Academy of Sciences
Geology of Ore Deposits | Year: 2016

The study focuses on the identification and investigation of crystal-optical anisotropy phenomena observed on surfaces of a curve-faced diamond crystal found in alluvial sediments of the Lower Us’va River in Perm territory. Raman spectroscopy and atomic force microscopy show that interference of polarized light reflected from the tetrahexahedral faces of the diamond crystal is inspired by anisotropic carbonic matter, which appears as a film with graphene or nanographite structure and about 4 nm in thickness. The data allow us to suggest the formation conditions of curve-faced diamond crystals and origin of nanocrystalline carbonic matter on their faces. © 2016, Pleiades Publishing, Ltd.

Tatarskiy A.Y.,NPP InzGeofizika | Glazunov V.V.,Saint Petersburg Mining University | Efimova N.N.,Karpinsky Russian Geological Research Institute | Kulikov A.I.,NPP InzGeofizika
Engineering Geophysics 2017 | Year: 2017

This paper is presenting an application of capacitive resistivity and ground penetrating radar for studying of the state of frozen sand mounds. It shown a results of methodological and industrial field works. Application of the complex can provide information about the structure of the mound and qualitatively evaluate the condition of the sandy soil. The presence within the mounds of various geoelectric varieties sands indicate spatial variations of their bearing capacity.

Krasnobaev A.A.,Russian Academy of Sciences | Puchkov V.N.,Russian Academy of Sciences | Sergeeva N.D.,Russian Academy of Sciences | Shokalski S.P.,Karpinsky Russian Geological Research Institute | Busharina S.V.,Russian Academy of Sciences
Doklady Earth Sciences | Year: 2017

Zircons were separated from syenites of the Avashla intrusion in the Kurgass anticline of the Bashkir megaanticlinorium in the Southern Urals. The obtained samples were dated using the U–Pb procedure by means of a SHRIMP II ion microprobe. The integrated mineralogical, geochemical, and isotope studies of zircons resulted in primary data on the origin and current conditions of zircons in syenites of the Avashla intrusion. The relics of early zircon generations (1320–1340 Ma) allowed us to specify the geological position of syenites along with the stratigraphic location of the enclosing sedimentary rocks. The time of the transformation (metamorphism) of the zircons at the Middle–Upper Riphean boundary is represented by a dating of 1097±20 Ma, which is of importance for specifying the boundary age and for revealing a geological event that started a new development stage of the stratoregion in the Upper Riphean. © 2017, Pleiades Publishing, Ltd.

Vernikovskaya A.E.,Russian Academy of Sciences | Datsenko V.M.,Krasnoyarsk Research Institute of Geology | Vernikovsky V.A.,Russian Academy of Sciences | Matushkin N.Yu.,Russian Academy of Sciences | And 5 more authors.
Doklady Earth Sciences | Year: 2013

Neoproterozoic carbonatites and related igneous rocks, including A-type granites in the Tatarka-Ishimba suture zone of the Yenisey Ridge are confined to a horst-anticlinal structure that was formed in a transpression setting during the oblique collision between the Central Angara terrane and the Siberian craton. The carbonatites, associating mafic (including alkaline) dikes as well as the Srednetatarka nepheline syenites are the oldest igneous formations of the Tatarka active continental margin complex. Geochronological data indicate that magmatic evolution continued in the studied anticline for nearly 100 m.y. On the earliest stage carbonatites were formed and on the last stage - the emplacement of mantle-crustal A-type Tatarka granites took place. According to new U/Pb zircon studies, the earliest rocks in the Tatarka pluton are A-type leucogranites aged 646 ± 8 Ma. The younger 40Ar/ 39Ar ages of carbonatites obtained for phlogopites (647 ± 7 and 629 ± 6 Ma) are related to the last tectonic events in the studied region of the Tatarka-Ishimba suture zone, which are coeval with the formation of the A-type granitoids (646-629 Ma). © Pleiades Publishing, Ltd., 2013.

Danukalova M.K.,Russian Academy of Sciences | Tolmacheva T.Y.,Karpinsky Russian Geological Research Institute | Mannik P.,Tallinn University of Technology | Suyarkova A.A.,Karpinsky Russian Geological Research Institute | And 3 more authors.
Stratigraphy and Geological Correlation | Year: 2015

Much of the material of Paleozoic successions of Kotelnyi Island (New Siberian Islands) is composed of various carbonates, which accumulated in relatively shallow conditions in the Ordovician–Middle Devonian. Such deposits are widespread in synchronous sections throughout the Eastern Arctic and therefore attract attention as a potential tool for interregional correlations. In paleotectonic reconstructions, Kotelnyi Island either is included in terrain which was disconnected from the Siberian Platform in the Paleozoic or is joined to it. These different interpretations result from lack of primary evidence. This paper presents new data on stratigraphy and macroand microfauna of the Upper Ordovician and Silurian of the central regions of Kotelnyi Island. For this interval, we propose a correlation of the studied sections with those of adjacent regions. A conclusion is drawn on the basis of the similarity of lithology and fossil assemblages and also shared trends in the evolution of the sedimentary environment that the Upper Ordovician–Silurian beds of Kotelnyi Island, Taimyr, and the Siberian Platform accumulated in a single shelf basin, which apparently also extends to northeastern Chukotka. © 2015, Pleiades Publishing, Ltd.

Degtyarev K.E.,Russian Academy of Sciences | Tolmacheva T.Y.,Karpinsky Russian Geological Research Institute | Tretyakov A.A.,Russian Academy of Sciences | Kotov A.B.,Russian Academy of Sciences | Shatagin K.N.,RAS Institute of Geology and Mineralogy
Geotectonics | Year: 2016

A comprehensive study of the Lower Palaeozoic complexes of the Kokchetav Massif and its fringing has been carried out. It has allowed for the first time to discover and investigate in detail the stratified and intrusive complexes of the Cambrian–Early Ordovician. Fossil findings and isotope geochronology permitted the determination of their ages. The tectonic position and internal structures of those complexes have also been defined and their chemical features have been analyzed as well. The obtained data allowed us to put forward a model of the geodynamic evolution of Northern Kazakhstan in the Late Ediacaran–Earliest Ordovician. The accumulation of the oldest Ediacaran to Earliest Cambrian siliciclastics and carbonates confined to the Kokchetav Massif and its fringing occurred in a shallow shelf environment prior to its collision with the Neoproterozoic Daut island arc: complexes of the latter have been found in the northeast of the studied area. The Early Cambrian subduction of the Kokchetav Massif under the Daut island arc, their following collision and exhumation of HP complexes led to the formation of rugged ground topography, promoting deposition of siliceous–clastic and coarse clastic units during the Middle to early Late Cambrian. Those sediments were mainly sourced from eroded metamorphic complexes of the Kokchetav Massif basement. At the end of the Late Cambrian to the Early Ordovician within the boundaries of the massif with the Precambrian crust, volcanogenic and volcano-sedimentary units along with gabbros and granites with intraplate affinities were formed. Simultaneously in the surrounding zones, which represent relics of basins with oceanic crust, N-MORB- and E-MORB-type ophiolites were developed. These complexes originated under extensional settings occurred in the majority of the Caledonides of Kazakhstan and Northern Tian Shan. In the Early Floian Stage (Early Ordovician) older heterogeneous complexes were overlain by relatively monotonous siliceous–clastic units, that were being deposited until the Middle Darrivilian Stage (Middle Ordovician). © 2016, Pleiades Publishing, Inc.

Gusev N.I.,Karpinsky Russian Geological Research Institute
Geology of Ore Deposits | Year: 2011

The Kalguty ore-magmatic system (OMS) contains economic greisen and vein rare-metal-tungsten-molybdenum mineralization. The data on U-Pb zircon (SHRIMP II) age of nine samples of igneous rocks from the Kalguty OMS are accompanied by chemical, ICP-MS, and ICP-AES analyses of the main rock varieties. Porphyritic biotite granite of the main phase of the Kalguty pluton is characterized by the concordant age of 207.5 ± 1.7 Ma (MSWD = 0.034). The concordant age of the leucogranitic dikes pertaining to the East Kalguty Complex is 204 ± 2 Ma (MSWD = 0.65) for elvan and 200.8 ± 1.1 Ma (MSWD = 0.72) for ultrapotassic rhyolite porphyry. The two-mica and muscovite leucogranite of the Eastern stock is significantly younger: 195 ± 2.7 Ma (MSWD = 0.076) and 193.1 ± 2.1 Ma (MSWD = 0.0009). Thus, the Chingadatui Complex (the main phase of the Kalguty pluton) and dikes of the East Kalguty Complex are Late Triassic in age. The two-mica leucogranites of the Eastern, Zhumaly, and other stocks are most likely correlated to the Early Jurassic Alacha Complex of rare-metal granites. The superposition of greisen mineralization on elvan and ongonite dikes may be related to the emplacement of younger, Early Jurassic ore-forming two-mica and muscovite granites. Judging from zircon xenocrysts in granites, the Mesoproterozoic igneous rocks dated at 1.5 Ga and products of erosion of the rocks dated at 1.7 and 2.5 Ga occur in the basement of the Kalguty volcanic-tectonic structure. This is sound evidence for the occurrence of ancient continental crustal blocks in the southwestern part of the Altai-Sayan region. © 2011 Pleiades Publishing, Ltd.

Shishkin M.A.,Karpinsky Russian Geological Research Institute | Lebedeva E.A.,Karpinsky Russian Geological Research Institute
Geoinformatics 2010 - 9th International Conference on Geoinformatics: Theoretical and Applied Aspects | Year: 2010

Peiome Computer database included field geological information is obligatory part of State Geological Maps of Russian Federation scale 1:200 000 (second edition). Main principles of new database structure are priority of GIS-layers of geological map and employment traditional forms of field geological documentation. ESRY shape-format is accepted as the base format of GIS-layers. Microsoft Access database is accepted for preservation of initial field geological information. Connection between GIS and Microsoft Access database is realized by independent program manager.

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