A Record of Humidity Changes in Sections of a Valley Peatbog in the Southern Part of the Far East     

Razzhigaeva  N. G.  Kopoteva  T. A.  Makarova  T. R.  Grebennikova  T. A.  Lyashchevskaya  M. S.  Mokhova  L. M.  Ganzey  L. A.  Kudryavtseva  E. P.  Panichev  A. M.  Klimin  M. A.  Arslanov  Kh. A.  Maksimov  F. E.  Petrov  A. Yu. 《Doklady Earth Sciences》2023,507(1):S69-S80

Doklady Earth Sciences - Comprehensive study of sections of mares in the Bolshaya Ussurka River basin has allowed highlighting climate changes over the past 2900 years. Reconstructions are based on...  相似文献   

Correction to: Zeolite containing rocks of kudurs and reasons of geophagy within the territory of Sikhote-Alin Nature Zapovednik,Far East of Russia     

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   

Geological and biological aspects of a find of natural alloy (Au-Cu-Ag) nanoparticles in Cenozoic zeolitized tuff of the Vanchinskaya basin (Primor’e Area)     

I. Yu. Chekryzhov  A. M. Panichev  P. P. Safronov  K. S. Golokhvast  A. A. Vedyagin  V. I. Bukhtiyarov 《Doklady Earth Sciences》2011,436(1):55-57

  相似文献   

Rare Earth Elements as a Causal Factor of Geophagy among Herbivorous Animals     

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   

Response of Landscapes of the Sikhote-Alin Western Slopes to the Middle–Late Holocene Climatic Changes     

N. G. Razzhigaeva  L. A. Ganzey  A. M. Panichev  T. A. Grebennikova  L. M. Mokhova  T. A. Kopoteva  E. P. Kudryavtseva  Kh. A. Arslanov  F. E. Maksimov  A. A. Starikova  S. V. Zakusin 《Izvestiya Atmospheric and Oceanic Physics》2017,53(7):679-698

The response of landscape biotic components of the western slope of the Sikhote-Alin Mountains (Bikin River middle flow) to the Middle–Late Holocene climate changes is discussed. The paleoreconstruction object was the Krasny Yar mari, which developed under the control of multidirectional short-term climatic changes. The last millennium was marked by particularly rapid and frequent changes in the local landscapes. The closely spaced orographic barrier strongly affected the development of biotic components and changes in the swamp hydrological regime. The moisture dynamics within the river catchment considerably controlled the development and change of the peat-forming plants. Several stages of the mari development were reconstructed; each began from the accumulation of eutrophic peat. It was followed by the transitional eutrophic–mesotrophic stage, with a higher role of atmospheric supply. The larch forests appeared in this part of the valley within the Atlantic–Subboreal cooling period. Korean pine developed in the forest vegetation in the low mountain relief at the beginning of the Subboreal and became one of the leading trees ~2.6–2.3 ka BP. The lower role of the Korean pine and birch forest expansion in the first half of the Subatlantic could be related to the fires. The broadleaf–Korean pine forests became widespread in the Medieval Warm Period. Local swamp landscapes changed dramatically in the Little Ice Age, while the slope vegetation was not subject to any major changes. The landscapes were also affected by the fires, which became more frequent. The derivative communities with birch appeared on the mari. Moreover, this part of the valley was occasionally subject to heavy flooding.  相似文献   

New data on the stratigraphy,volcanism, and zeolite mineralization of the Cenozoic Vanchinskaya depression in primorye     

I. Yu. Chekryzhov  V. K. Popov  A. N. Panichev  V. V. Seredin  E. V. Smirnova 《Russian Journal of Pacific Geology》2010,4(4):314-330

This paper presents the results of studying the Cenozoic volcanogenic-sedimentary cover of the Vanchinskaya depression of Sikhote Alin. It was established that, in terms of the taxonomic composition of the fossil plants, the basal part of the Cenozoic section is attributed to the Paleocene, while the overlaying coal-bearing sequence, to the Early Eocene. The geochronological (K-Ar) dating showed that the volcanic rocks intruding and overlaying the coal-bearing deposits are Middle Eocene in age: rhyolites—44.7 ± 1.0; trachyandesites—43.7 ± 1.4 Ma. The petrographic and geochemical characteristics of the volcanic and volcanogenic-sedimentary rocks and related zeolitites are described. The zeolitized rocks containing plant detritus differ in their extremely high contents of Y and HREE. The zeolitization of the volcanic glass in tuffs, tuffites, and perlites was caused by hydrothermal solutions that ascended along NW fault zones from the subsurface magmatic chamber.  相似文献   

Excess of Rare-Earth Elements in Plant Foods as a Cause of Geophagy among Ungulates in Gornyi Altai     

Panichev  A. M.  Baranovskaya  N. V.  Chekryzhov  I. Ju.  Seryodkin  I. V.  Vakh  E. A.  Elovskii  E. V. 《Doklady Earth Sciences》2022,507(1):964-967

Doklady Earth Sciences - Geological and hydrobiogeochemical studies carried out in two areas of active geophagy among herbivorous animals in the area of Teletskoye Lake in the Altai Mountains...  相似文献   

Results of mineralogical–geochemical researches of two high-mountain kudurs within territory of Caucasus     

A. M. Panichev  I. Yu. Chekryzhov  T. A. Stolyarova  E. I. Mitina  S. A. Trepet  A. A. Sergievich  P. P. Khoroshikh 《Environmental Earth Sciences》2017,76(21):749

The article focuses on the development of the reasons of the consumption by the wild herbivorous animals of the subsurface rocks in the apical part of Alous and Atamagu mountains, situated on the territory of the Caucasian State Biosphere Reserve. It was investigated the mineralogical and geochemical peculiarities of the eaten and not eaten rocks, the chemical composition of their water extracts and also the chemical composition of vegetation. It was determined that the consumed rocks mainly consist of the clay mineral illite, crystalline silica, hydrous micas and chlorites and are the derivatives of eolation of the Paleozoic granitoids in one case, and argillite–aleurolites of the Jurassic age in the second case. The chemical composition of the aqueous extracts demonstrated the relatively low contents of natrium and other macrocomponents in comparison with the non-consumed rocks, and also the increased content of lanthanides. The elicited facts are not compatible with the hypothesis that the pursuance for geophagia in animals at Caucasus can be connected with the peculiarities of elements change from lanthanide group in the organism.  相似文献