Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Alexey Ragozin"'
Autor:
Anastasiya Starikova, Ilya Prokopyev, Anna Doroshkevich, Alexey Ragozin, Vasily Chervyakovsky
Publikováno v:
Minerals, Vol 11, Iss 4, p 408 (2021)
Olivine from the deep mantle-derived rocks, such as ultramafic lamprophyres, carries important information about the composition of the mantle source, the processes of mantle metasomatism, the origin of specific silicate-carbonate melts, as well as t
Externí odkaz:
https://doaj.org/article/33852d0231404c32a5b928b44403814d
Autor:
Denis Mikhailenko, Alexander Golovin, Andrey Korsakov, Sonja Aulbach, Axel Gerdes, Alexey Ragozin
Publikováno v:
Minerals, Vol 10, Iss 4, p 383 (2020)
A coesite-bearing diamondiferous eclogite from the Udachnaya kimberlite (Daldyn field, Siberian craton) has been studied to trace its complex evolution recorded in rock-forming and minor mineral constituents. The eclogite sample is composed of rock-f
Externí odkaz:
https://doaj.org/article/f98b6002658a47ffabb1b88778d23567
Publikováno v:
Minerals, Vol 10, Iss 1, p 18 (2019)
The paper presents new data on the internal structure of super-deep (sublithospheric) diamonds from Saõ-Luiz river placers (Brazil) and from alluvial placers of the northeastern Siberian platform (Yakutia). The sublithospheric origin of these diamon
Externí odkaz:
https://doaj.org/article/9ae1e3f1d5594c35aa8dea4c22402f8a
Publikováno v:
Minerals, Vol 9, Iss 7, p 412 (2019)
New findings of silicate-melt inclusions in two alluvial diamonds (from the Kholomolokh placer, northeastern Siberian Platform) are reported. Both diamonds exhibit a high degree of N aggregation state (60−70% B) suggesting their long residence in t
Externí odkaz:
https://doaj.org/article/74439edfba76402e9a0f2af1790b4f20
Publikováno v:
Crystals, Vol 7, Iss 8, p 238 (2017)
Yellow cuboid diamonds are commonly found in diamondiferous alluvial placers of the Northeastern Siberian platform. The internal structure of these diamonds have been studied by optical microscopy, X-Ray topography (XRT) and electron backscatter diff
Externí odkaz:
https://doaj.org/article/374e4ded9c1b4516a26d1180f0c361a4
Publikováno v:
Crystals, Vol 7, Iss 5, p 133 (2017)
The Zarnitsa kimberlite pipe is one of the largest pipes of the Yakutian diamondiferous province. Currently, some limited published data exists on the diamonds from this deposit. Among the diamond population of this pipe there is a specific series of
Externí odkaz:
https://doaj.org/article/f13e8462ad3144aaacd695d4712b4f0c
Publikováno v:
Geochemistry International. 59:743-756
The paper presents data on garnets from serpentinized peridotite xenoliths in the Nyurba and Botuoba kimberlite pipes of the Nakyn kimberlite field. The major and trace-element compositions of the garnets were analyzed to determine their compositiona
Publikováno v:
Russian Geology and Geophysics. 62:547-556
—The isotope-geochemical features of diamondiferous metamorphic rocks of the Kokchetav subduction–collision zone (KSCZ) show that both the basement rocks and the sediments of the Kokchetav massif were their protoliths. A whole-rock Sm–Nd isochr
Publikováno v:
International Geology Review. 64:1119-1138
Zircon xenocrysts from two diamond-barren kimberlite pipes (Leningrad and Ruslovaya) in the West Ukukit kimberlite field opened a ‘window’ to the buried crustal basement in the northern Siberian cr...
Publikováno v:
Doklady Earth Sciences. 493:513-516
The data available indicate the complex evolution of deformed peridotites of mantle xenoliths, the P–T parameters of which indicate that they are fragments of the metasomatized lower part of the cratonic lithosphere. The zoning established in garne