Zobrazeno 1 - 10
of 60
pro vyhledávání: '"E. F. Letnikova"'
Publikováno v:
Геодинамика и тектонофизика, Vol 13, Iss 5 (2022)
There have been presented the results of the study of a thick (no less than 2–3 km), extended (for more than 200 km) volcanogenic formation (Tsetsen-Uul or Yargait) in the south of the Zavkhan terrane of the Central Asian fold belt. The formation i
Externí odkaz:
https://doaj.org/article/14e4fcf68b70457da9fc8c3834056db3
Publikováno v:
Геодинамика и тектонофизика, Vol 13, Iss 2 (2022)
A comprehensive study of the stratotype section of the Kinterep formation of the North-Western Salair was carried out, including geochemical and isotope (Sr, C, O) studies of carbonate rocks, and U-Pb dating (LA-ICP-MS) of igneous zircon crystals fro
Externí odkaz:
https://doaj.org/article/ef6c08ccdafe443e8405359170cedaf5
Publikováno v:
Литосфера, Vol 19, Iss 4, Pp 558-579 (2019)
Research subject. This article is devoted to the geochemistry of manganese deposits referred to the Devonian paleovolcanic complexes of the Magnitogorsk belt in the Southern Urals.Materials and methods. A series of studies was conducted using materia
Externí odkaz:
https://doaj.org/article/4fe41616c5ad4d7b9fe89b10bb0cb4e1
Publikováno v:
Геодинамика и тектонофизика, Vol 8, Iss 3, Pp 557-560 (2017)
On the basis of isotopic-geochemical studies and analysis of geological evidences heterogeneity of Hamsara terrane has been determined. Formation of stationed metamorphosed layers underlying the Hamsara formation occurred not earlier than 630 Ma, pro
Externí odkaz:
https://doaj.org/article/3653921eaeb3436e96b45fd8f8587f0e
Autor:
S. I. Shkolnik, V. A. Belyaev, E. F. Letnikova, E. I. Demonterova, N. V. Bryansky, K. K. Kolesov, A. V. Ivanov
Publikováno v:
Doklady Earth Sciences.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe61e1601646a66591000049e0ff224e
https://doi.org/10.1134/s1028334x23600330
https://doi.org/10.1134/s1028334x23600330
Publikováno v:
Doklady Earth Sciences. 498:451-455
Based on the dating of metamorphic and igneous rocks of the northeastern part of the Khamsara terrane, the main stages of tectono-magmatic activity at the border of two large structures—the Central Asian fold belt (CAFB) and the Siberian craton—h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc74ae88577e2abe545c754ce1e51cf9
https://doi.org/10.1134/s1028334x21060143
https://doi.org/10.1134/s1028334x21060143
Autor:
E. F. Letnikova, A. I. Brusnitsyn, S. I. Shkolnik, Alexander V. Ivanov, E. N. Perova, E. N. Lepekhina
Publikováno v:
Doklady Earth Sciences. 497:195-199
Isotope study of ore-bearing rocks at Fe–Mn rift deposits of the Atasu and Zhezdy (Dzhezdy) ore districts in Central Kazakhstan has been carried out for the first time. The Atasu felsic effusive rocks (Ushkatyn-1 deposit), synchronous to ore genesi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42bf806731618214193b0f492031b736
https://doi.org/10.1134/s1028334x21010207
https://doi.org/10.1134/s1028334x21010207
Publikováno v:
Geochemistry International. 59:229-242
The paper reports petrochemical and isotope data on the ferromanganese ores and host volcanosedimentary rocks of the Taloi–Usoi interfluve of the Ikat terrane, the Central Asian Fold Belt. Obtained data indicate that the formation of the Taloi ferr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6322bb84e94ebc16251f668e2b955db
https://doi.org/10.1134/s0016702921030083
https://doi.org/10.1134/s0016702921030083
Autor:
E. F. Letnikova, Andrey E. Izokh, V. B. Ershova, F. A. Letnikov, E. N. Federyagina, Y. A. Kosticin, S. I. Shkolnik, A. D. Nojkin, Alexander V. Ivanov, E. A. Brodnikova
Publikováno v:
Doklady Earth Sciences. 496:53-59
On the basis of petrographic and mineralogical studies, we have established the presence of clastic rocks with a strong predominance of K-feldspar among the rock-forming fragments within the Late Precambrian sedimentary sequence in the southwestern p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24eed1b5715bcdd39d0f0b23c14601aa
https://doi.org/10.1134/s1028334x21010128
https://doi.org/10.1134/s1028334x21010128
Publikováno v:
Russian Geology and Geophysics. 61:1121-1135
—A high-amplitude negative δ13C anomaly (–11‰ V-PDB) has been found in the carbonate horizons of the Chistyakovka Formation of the Taseeva Group in the type sections of the southern Yenisei Ridge. The δ18O values (–2.7 to –5.4‰ V-PDB) a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47a6a1fa6989f91e9dbeddceb04640a9
https://doi.org/10.15372/rgg2019142
https://doi.org/10.15372/rgg2019142