Geochemical and Lu/Hf isotopic (LA–ICP–MS) systematics of detrital zircons from the Upper Ordovician sandstones of the Bashkir Uplift (Southern Urals)

Romanyuk, T.V.; Kuznetsov, N.B.; Belousova, E.A.; Degtyarev, K.E.; Maslov, A.V.; Gorozhanin, V.M.; Gorozhanina, E.N.; Pyzhova, E.S.

Авторы: Romanyuk T.V., Kuznetsov N.B., Belousova E.A., Degtyarev K.E., Maslov A.V., Gorozhanin V.M., Gorozhanina E.N., Pyzhova E.S.
Журнал: Doklady Earth Sciences
Том: 472
Номер: 2
Год издания: 2017
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 134
Последняя страница: 137
Оригинальные версии: Геохимическая и Lu/Hf-изотопная (LA-ICP-MS) систематика обломочных цирконов из верхнеордовикских песчаников Башкирского поднятия (Южный Урал)
DOI: 10.1134/s1028334x17020039
Аннотация: Analyses of trace elements and Lu/Hf isotopes have been carried out in already U–Pb dated detrital zircons from the Upper Ordovician sandstones of the southern part of the Bashkir Uplift. The concentrations of trace elements in the zircons suggest that they were derived from rocks of intermediate (62%), basic (24%), and felsic (9%) compositions as well as alkaline rocks (2%). The Lu/Hf systematics of the zircons demonstrated a wide variation of both εHf (from +9.5 to –8.7) and model ages of the parental rocks (1.60 Ga < < 3.28 Ga). Comparison of the isotopic–geochemical characteristics of the detrital zircons from different levels of the Riphean–Paleozoic sequence of the Bashkir Uplift against those from the Early Cambrian Brusov Formation of the Mezen Basin and Early Neoproterozoic Dzhezhim sandstones of Timan Ridge suggests that at the end of the Late Precambrian near the Uralian margin of Baltica a large block of Late Mesoproterozoic–Early Neoproterozoic crust existed, comprising a significant proportion of melanocratic rocks.
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Geochemical and Lu/Hf isotopic (LA–ICP–MS) systematics of detrital zircons from the Upper Ordovician sandstones of the Bashkir Uplift (Southern Urals)статья

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