Метаморфические комплексы п-ва Святой Нос и восточного побережья оз. Байкал (Забайкалье): геохимия, возраст, Sm-Nd изотопные данные Е. И. Михеев, А. Г. Владимиров, А. В. Травин [и др.]
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ArticleOther title: Metamorphic complexes of Sviatoy Noss peninsula region in Transbaikalia: geochemistry, age, Sm-Nd isotope data [Parallel title]Subject(s): Святой Нос, полуостров | Байкал, озеро | метаморфические комплексы | изотопные исследованияGenre/Form: статьи в сборниках Online resources: Click here to access online
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Петрология магматических и метаморфических комплексов. Вып. 10 : материалы X Всероссийской конференции с международным участием, 27 ноября - 30 ноября 2018 года Вып. 10. С. 253-257Abstract: Metamorphic complexes of Sviatoy Noss peninsula region (450 Ma) are fragments of Early Paleozoic accretion-collision system in Transbaikalia. Metamorphism degree is upper amphibolite facies (P = 6,2-7,2 kbar, T = 705-745 °C). The compositions of protoliths correspond to island arc metavolcanic or metavolcanogenic-sedimentary complexes (495-460 Ma), in which calc-alkaline and alkaline series volcanics predominate, tholeitic volcanics are less common. Sm-Nd model ages for gneisses (1626-1544 Ma) and amphibolites (867 Ma) indicate Meso- Neoproterozoic the lower age limit for the protoliths of the metamorphic complexes. Amphibole (256-245 Ma, P3-T2) and biotite (183-169 Ma, J1-2) Ar-Ar isotope ages reflect the Mesozoic history of the metamorphic complexes and correlate with the stages of the continental lithosphere extension in Transbaikalia.
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Metamorphic complexes of Sviatoy Noss peninsula region (450 Ma) are fragments of Early Paleozoic accretion-collision system in Transbaikalia. Metamorphism degree is upper amphibolite facies (P = 6,2-7,2 kbar, T = 705-745 °C). The compositions of protoliths correspond to island arc metavolcanic or metavolcanogenic-sedimentary complexes (495-460 Ma), in which calc-alkaline and alkaline series volcanics predominate, tholeitic volcanics are less common. Sm-Nd model ages for gneisses (1626-1544 Ma) and amphibolites (867 Ma) indicate Meso- Neoproterozoic the lower age limit for the protoliths of the metamorphic complexes. Amphibole (256-245 Ma, P3-T2) and biotite (183-169 Ma, J1-2) Ar-Ar isotope ages reflect the Mesozoic history of the metamorphic complexes and correlate with the stages of the continental lithosphere extension in Transbaikalia.
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