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B. I. Pavlyutkin I. Yu. Chekryzhov T. I. Petrenko 《Russian Journal of Pacific Geology》2016,10(4):283-298
The Paleogene–Neogene stratigraphic scale of the Zerkal’naya River basin is modified with account for new isotopic and paleobotanical data. It is established that the Tadushi Formation and underlying volcanics, which were previously considered as representing transitional Cretaceous–Paleocene strata, are separated in the section of the Ustinovka quarry by a significant stratigraphic hiatus. According to the new data, the volcanics and the Tadushi Formation are established as Campanian and Late Paleocene in age, respectively. The Bogopol Formation in the type section is dated back to the Middle–Late Paleocene. The Svetlyi Formation is now considered to be Early Eocene in age, rather than Late Eocene–Oligocene as previously thought. A new variant of the stratigraphic scale is proposed for the Paleogene–Neogene deposits of the Zerkal’naya depression. 相似文献
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B. I. Pavlyutkin T. I. Petrenko I. Yu. Chekryzhov 《Russian Journal of Pacific Geology》2018,12(2):119-134
Complex geological and paleobotanic analysis of sections of the boundary Oligocene–Miocene sediments of southern Primorye is conducted. The presence of a stratigraphic hiatus is identified in the transitional complexes of the Pushkino and Pavlovka depressions but not in the sections of the Rakovka depression; thus, it is suggested to use one of them (borehole no. 15) to choose the stratotype of the Paleogene–Neogene boundary. The previous conclusion on the presence of economic coal deposits of Primorye within the Paleogene part of the Tertiary complex is supported. It is suggested to use the section which is exposed by the Rakovka brown coal open pit (point 9209) as a stratotype of the upper subformation of the Pavlovka Formation. 相似文献
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New data on Cenozoic mineralization in the Vanchin coal basin are presented. In addition to the Au-Ag quartz-adularia veins known since the 1970s (Soyuzny deposit), stratified Au-Ag mineralization in tuffaceous-sedimentary rocks, porphyry tin mineralization in the extrusion of tourmalinized rhyolite, metalliferous coal seams enriched in Au, Ge, and REE are hosted in this graben. The localization and chemical and mineral compositions of these types of mineralization are considered. It is shown that Au-Ag mineralization is more widespread in the graben that was previously supposed. The anomalous and diverse mineralization of the Vanchin Graben is attributed, first of all, to long-term evolution of volcanism and hydrothermal activity developing synchronously with lacustrine and bog sedimentation and continuing after its termination. The main stages of ore formation are related to volcanic centers differing in age and conjugate hydrothermal systems functioning above a long-living magma chamber. 相似文献
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Panichev Aleksander Seryodkin Ivan Popov Vladimir Chekryzhov Igor Makarevich Raisa Lutsenko Tatiana Stolyarova Tatiana Sergievich Aleksander Khoroshikh Pavel Maksimova Darya Petrunenko Yury 《Arabian Journal of Geosciences》2020,13(4):1-11
This paper establishes a mechanical model of the stress distribution in front of the driving face during coal roadway excavation. Theoretical research shows that the stress state in the plastic zone of the driving face is consistent with the limit equilibrium equation, and the elastic zone is in accordance with the equilibrium equation based on elasticity mechanics. Based on this improved mechanical state solution model, different coal material constitutive hypotheses are used for the analysis. The width of the plastic zone calculated under the brittle-perfectly elastic model can reach 2–5 times the height of the roadway, and the stress concentration coefficient can reach two or more times. 3DEC numerical simulation software was used to simulate the stress distribution of the heading face. The results of the simulation are similar to those of the theoretical analysis. Compared with the elastic-perfectly plastic model, the calculated results of the brittle-perfectly elastic model are more consistent with the numerical simulation results. The heading face coal during roadway excavation shows obvious damage, and the strength characteristics of the coal decrease. 相似文献
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Panichev A. M. Baranovskaya N. V. Chekryzhov I. Ju. Seryodkin I. V. Vakh E. A. Belyanovskaya A. 《Doklady Earth Sciences》2021,499(1):599-603
Doklady Earth Sciences - Extensive geological and hydrobiogeochemical studies were conducted for the first time in two Sikhote-Alin (Primorskii krai) areas, where geophagy among wild ungulates has... 相似文献
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B. I. Pavlyutkin I. Yu. Chekryzhov T. I. Petrenko 《Russian Journal of Pacific Geology》2012,6(4):310-325
The geological characteristics of the productive coaliferous sequence and the overlying strata (the Nezhino Sequence) at the Nezhinsky brown coal field are provided with detailed geological and paleobotanical data on the Nezhino Sequence (operating quarry), which is proposed as its type section. Based on the analysis of the macro- and microfloral assemblages, the transitional Late Oligocene-early Miocene age is inferred for these sediments. The floras from both the sequences demonstrate no principal differences, being moderately thermophilic in composition, although the Nezhino flora is more thermophilic. The coaliferous and Nezhino sequences are assumed to be separated by a stratigraphic hiatus. It is shown that they are similar to the Oligocene-Miocene boundary sections in the adjacent regions. The Nezhino Sequence (lower Miocene) most likely corresponds to the upper Aquitanian-Burdigalian interval in the Standard stratigraphic scale. The Paleogene-Neogene boundary in the Primorye region is proposed to be placed at the top of the Pavlovka Horizon. In the Nezhino brown coal field, it coincides with the upper boundary of the coaliferous sequence. 相似文献
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B. I. Pavlyutkin I. Yu. Chekryzhov T. I. Petrenko 《Russian Journal of Pacific Geology》2011,5(1):47-63
New data were obtained on the Voznovo Formation, one of the key Tertiary stratigraphic units in East Sikhote-Alin. The analysis
of macro- and microflora in this unit showed that the decision to assign it to the Miocene (Resolutions…, 1994) was invalid. The early Oligocene age of the formation is justified. It is shown that the sediments constituting the
formation were deposited in a barrier lake. The analysis of the Voznovo taphoflora reveals its mountainous ecotype, which
indicates the ancient age of the Sikhote-Alin mountainous system. The Voznovo Formation is correlated with other coeval stratigraphic
units of the region. 相似文献