Crust–mantle xenoliths from the kharchinsky volcano (Central kamchatka depression): Mineralogy and petrogenesis

V. S. Sekisova; S. Z. Smirnov; D. V. Kuzmin; A. Ya Shevko; M. P. Gora

doi:10.2113/RGG20194109

Crust–mantle xenoliths from the kharchinsky volcano (Central kamchatka depression): Mineralogy and petrogenesis

Переведенное название: Корово-мантийные ксенолиты: минералогия и петрогенезис

V. S. Sekisova, S. Z. Smirnov, D. V. Kuzmin, A. Ya Shevko, M. P. Gora

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

Аннотация

Приведены новые данные по минералогии и геохимии ксенолитов глубинных пород из некка вулкана Харчинский (Центральная Камчатская депрессия, ЦКД). Показано, что породы ксенолитов представлены перидотитами и клинопироксенитами. Среди перидотитов установлены верлиты, дуниты и гарцбургиты, сложенные различными количествами оливина (Ol), клино- и ортопироксена, а также амфибола (Amp) и хромита (Chr). Пироксениты преимущественно состоят из клинопироксена (Cpx), реже наблюдаются Ol, Amp, герцинит (Hc) и магнетит (Mgt). Ксенолиты содержат интерстициальные обособления и прожилки, сложенные хлоритом (Chl), плагиоклазом (Pl), щелочным полевым шпатом (Kfs), ортопироксеном (Opx), баритом (Brt), фторапатитом (Ap), ильменитом (Ilm), реже ангидритом (Anh), флогопитом (Phl) и некоторыми другими минералами. Установлено, что минералы прожилков иногда замещают первичные минералы, вплоть до образования псевдоморфоз, указывая на метасоматическое происхождение интерстициальных и жильных ассоциаций. На основании минералотермобарометрических расчетов установлено, что перидотиты образовывались на глубинах от шпинелевой (Sp) фации до границы Мохо при температурах около 1140 °С и давлениях, не превышающих 10 кбар в промежуточных камерах. Метасоматические преобразования пород, проявленные в интерстициях, происходили при температурах ~400-850 °C.

Переведенное название	Корово-мантийные ксенолиты: минералогия и петрогенезис
Язык оригинала	английский
Номер статьи	6
Страницы (с-по)	339-356
Число страниц	18
Журнал	Russian Geology and Geophysics
Том	62
Номер выпуска	3
DOI	https://doi.org/10.2113/RGG20194109
Состояние	Опубликовано - мар. 2021

Предметные области OECD FOS+WOS

1.05 НАУКИ О ЗЕМЛЕ И СМЕЖНЫЕ ЭКОЛОГИЧЕСКИЕ НАУКИ
1.05.KY ГЕОЛОГИЯ
1.05.GC ГЕОХИМИЯ И ГЕОФИЗИКА

ГРНТИ

38 ГЕОЛОГИЯ

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10.2113/RGG20194109

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title = "Crust–mantle xenoliths from the kharchinsky volcano (Central kamchatka depression): Mineralogy and petrogenesis",

abstract = "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.",

keywords = "Clinopyroxenites, Kamchatka, Olivine, Peridotites, Xenoliths",

author = "Sekisova, {V. S.} and Smirnov, {S. Z.} and Kuzmin, {D. V.} and Shevko, {A. Ya} and Gora, {M. P.}",

note = "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: {\textcopyright} 2021, V.S. Sobolev IGM, Siberian Branch of the RAS. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

month = mar,

doi = "10.2113/RGG20194109",

language = "English",

volume = "62",

pages = "339--356",

journal = "Russian Geology and Geophysics",

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Crust–mantle xenoliths from the kharchinsky volcano (Central kamchatka depression): Mineralogy and petrogenesis. / Sekisova, V. S.; Smirnov, S. Z.; Kuzmin, D. V. и др.

В: Russian Geology and Geophysics, Том 62, № 3, 6, 03.2021, стр. 339-356.

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

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

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