Research output: Contribution to journal › Article › peer-review
Crust–mantle xenoliths from the kharchinsky volcano (Central kamchatka depression): Mineralogy and petrogenesis. / Sekisova, V. S.; Smirnov, S. Z.; Kuzmin, D. V. et al.
In: Russian Geology and Geophysics, Vol. 62, No. 3, 6, 03.2021, p. 339-356.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Crust–mantle xenoliths from the kharchinsky volcano (Central kamchatka depression): Mineralogy and petrogenesis
AU - Sekisova, V. S.
AU - Smirnov, S. Z.
AU - Kuzmin, D. V.
AU - Shevko, A. Ya
AU - Gora, M. P.
N1 - Funding Information: The field trip and petrographic studies were part of the state task of the Sobolev Institute of Geology and Mineralogy (Novosibirsk). The analytical studies were supported by the Russian Foundation for Basic Research according to research project No. 18-35-00491. The comprehensive re- Publisher Copyright: © 2021, V.S. Sobolev IGM, Siberian Branch of the RAS. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - We present results of a study of plutonic-rock xenoliths from the Kharchinsky Volcano (Central Kamchatka depression). The studied xenolith collection comprises nine samples of peridotites and clinopyroxenites. The peridotites are identified as wehrlites, dunites, and harzburgites composed of olivine, clino-and orthopyroxenes, amphibole, and chromite in varying amounts. The clinopyroxenites consist mostly of clinopyroxene and often contain subordinate olivine, amphibole, hercynite, and magnetite. The xenoliths have interstitial segregations and veins composed of chlorite, plagioclase, K-feldspar, orthopyroxene, barite, fluorapatite, ilmenite, and, more seldom, an-hydrite, phlogopite, and some other minerals. The study has revealed that veinlet minerals sometimes replace primary minerals and form pseudomorphs, thus indicating the metasomatic origin of interstitial and vein mineral assemblages. The thermobarometric calculations for minerals have shown that peridotites formed at ~1140 °C and ≤10 kbar in the intermediate chambers at the depths from the spinel stability field to the Moho. Interstitial metasomatic alterations of rocks took place at ~400–850 °C.
AB - We present results of a study of plutonic-rock xenoliths from the Kharchinsky Volcano (Central Kamchatka depression). The studied xenolith collection comprises nine samples of peridotites and clinopyroxenites. The peridotites are identified as wehrlites, dunites, and harzburgites composed of olivine, clino-and orthopyroxenes, amphibole, and chromite in varying amounts. The clinopyroxenites consist mostly of clinopyroxene and often contain subordinate olivine, amphibole, hercynite, and magnetite. The xenoliths have interstitial segregations and veins composed of chlorite, plagioclase, K-feldspar, orthopyroxene, barite, fluorapatite, ilmenite, and, more seldom, an-hydrite, phlogopite, and some other minerals. The study has revealed that veinlet minerals sometimes replace primary minerals and form pseudomorphs, thus indicating the metasomatic origin of interstitial and vein mineral assemblages. The thermobarometric calculations for minerals have shown that peridotites formed at ~1140 °C and ≤10 kbar in the intermediate chambers at the depths from the spinel stability field to the Moho. Interstitial metasomatic alterations of rocks took place at ~400–850 °C.
KW - Clinopyroxenites
KW - Kamchatka
KW - Olivine
KW - Peridotites
KW - Xenoliths
UR - http://www.scopus.com/inward/record.url?scp=85105011212&partnerID=8YFLogxK
UR - https://www.elibrary.ru/item.asp?id=46039249
U2 - 10.2113/RGG20194109
DO - 10.2113/RGG20194109
M3 - Article
AN - SCOPUS:85105011212
VL - 62
SP - 339
EP - 356
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 3
M1 - 6
ER -
ID: 28496340