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Eclogite-Like Metagabbro of the Olkhon Terrane, West Baikal Area

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dc.contributor.author Dobretsov N.L.
dc.contributor.author Sklyarov E.V.
dc.contributor.author Buslov M.M.
dc.contributor.author Kulikova A.V.
dc.contributor.author Lavrenchuk A.V.
dc.date.accessioned 2021-02-25T20:35:22Z
dc.date.available 2021-02-25T20:35:22Z
dc.date.issued 2020
dc.identifier.issn 0869-5911
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/161888
dc.description.abstract © 2020, Pleiades Publishing, Ltd. Abstract: Eclogite-like rocks of the Olkhon terrane correspond to two types according to the mode of occurrence and mineral compositions, although both types developed after the same type of gabbro of a single complex. The rocks of the first type are composed of garnet, clinopyroxene, pargasite (± scapolite, ± anorthite, ± spinel) and occur as thin veins or patches in the marginal parts of several small gabbro massifs of the Tonta Zone. The garnet is of almandine–pyrope–grossular composition and contains up to 40% of the pyrope end member. The rocks of the second type have been found in the Zamogoi Island in the Maloe More Strait. The island is composed of metasomatically altered gabbro cut by numerous granite and syenite veins. Carbonate and carbonate–silicate rocks compose dismembered veins and veinlets, as well as matrix embedding variably sized fragments of metasomatized gabbro and eclogite-like rocks in the southern part of the island. Based on the mode of occurrence and the presence of calcite–anorthite symplectite in some of the rocks, we suggest that the gabbro was penetrated by carbonate fluid or fluid–melt in a tectonic zone. The zone contains veins of garnet–clinopyroxene composition (varying from monomineralic garnetite to monomineralic pyroxenite) with minor pargasite, zoisite, anorthite, scapolite, and titanite. The garnet of Zamogoi Island has a grossular–almandine composition with a minor andradite concentration (about 10%). The compositions of minerals of the Zamogoi massif differ from the compositions of minerals in Tonta Zone, and the former are much more similar to skarn minerals.
dc.relation.ispartofseries Petrology
dc.subject collisional orogeny
dc.subject eclogite-like rocks
dc.subject fassaite
dc.subject gabbro
dc.subject garnet
dc.subject metamorphism
dc.subject metasomatism
dc.subject Olkhon terrane
dc.subject scapolite
dc.subject skarn
dc.title Eclogite-Like Metagabbro of the Olkhon Terrane, West Baikal Area
dc.type Article
dc.relation.ispartofseries-issue 6
dc.relation.ispartofseries-volume 28
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 515
dc.source.id SCOPUS08695911-2020-28-6-SID85098670624


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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