Petrogenesis of the despen volcanic rocks of the middle–late ordovician volcanoplutonic association of the tannu-ola terrane (Southwestern Tuva)

E. V. Vetrov; A. N. Uvarov; N. I. Vetrova; F. A. Letnikov; I. A. Vishnevskaya; F. I. Zhimulev; E. S. Andreeva; M. V. Chervyakovskaya

doi:10.2113/RGG20194167

Petrogenesis of the despen volcanic rocks of the middle–late ordovician volcanoplutonic association of the tannu-ola terrane (Southwestern Tuva)

Переведенное название: Петрогенезис деспенских вулканогенных образований образований средне- позднеордовикской вулкано-плутонической ассоциации ТАННУОЛЬСКОГО террейна (Юго-запад Тувы)

E. V. Vetrov, A. N. Uvarov, N. I. Vetrova, F. A. Letnikov, I. A. Vishnevskaya, F. I. Zhimulev, E. S. Andreeva, M. V. Chervyakovskaya

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

Аннотация

Изучены строение и состав вулканогенной толщи в долине р. Деспен на южном склоне хребта Восточный Танну-Ола, ранее относимой к кендейской свите нижнего девона. На основе геологических и геохронологических данных установлено, что их формирование происходило на рубеже 460-450 млн лет в ассоциации с гранитоидами арголикского комплекса на поздних стадиях аккреционно-коллизионного этапа развития Алтае-Саянского региона и Таннуольского террейна в частности. Вулканизм носил эксплозивный характер. Деспенские вулканиты представляют собой преимущественно кислые железистые металюминиевые и слабо пералюминиевые покровные разновидности, образованные путем дифференциации толеитовых базальтов. Спектры распределения РЗЭ деспенских вулканитов, как и арголикских гранитоидов, характеризуемые хорошо проявленной Eu аномалией и плоскими спектрами HREE, предполагают генерацию магмы в условиях верхней коры на небольших глубинах. Источник имел субдукционное происхождение, на что указывают Ta-Nb минимумы на мультиэлементных спектрах распределения мультиэлементов и значение εNd(T) от +3,1 до + 5,6. Модельный возраст источника – неопротерозойский (позднерифейский) TNd(DM-2st)=0,69-0,94 млрд лет.

Переведенное название	Петрогенезис деспенских вулканогенных образований образований средне- позднеордовикской вулкано-плутонической ассоциации ТАННУОЛЬСКОГО террейна (Юго-запад Тувы)
Язык оригинала	английский
Страницы (с-по)	633-647
Число страниц	15
Журнал	Russian Geology and Geophysics
Том	62
Номер выпуска	6
DOI	https://doi.org/10.2113/RGG20194167
Состояние	Опубликовано - июн 2021

Предметные области OECD FOS+WOS

1.05 НАУКИ О ЗЕМЛЕ И СМЕЖНЫЕ ЭКОЛОГИЧЕСКИЕ НАУКИ
1.05.KY ГЕОЛОГИЯ

ГРНТИ

38 ГЕОЛОГИЯ

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10.2113/RGG20194167

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Vetrov, E. V., Uvarov, A. N., Vetrova, N. I., Letnikov, F. A., Vishnevskaya, I. A., Zhimulev, F. I., Andreeva, E. S., & Chervyakovskaya, M. V. (2021). Petrogenesis of the despen volcanic rocks of the middle–late ordovician volcanoplutonic association of the tannu-ola terrane (Southwestern Tuva). Russian Geology and Geophysics, 62(6), 633-647. https://doi.org/10.2113/RGG20194167

Vetrov, E. V. ; Uvarov, A. N. ; Vetrova, N. I. ; Letnikov, F. A. ; Vishnevskaya, I. A. ; Zhimulev, F. I. ; Andreeva, E. S. ; Chervyakovskaya, M. V. / Petrogenesis of the despen volcanic rocks of the middle–late ordovician volcanoplutonic association of the tannu-ola terrane (Southwestern Tuva). В: Russian Geology and Geophysics. 2021 ; Том 62, № 6. стр. 633-647.

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title = "Petrogenesis of the despen volcanic rocks of the middle–late ordovician volcanoplutonic association of the tannu-ola terrane (Southwestern Tuva)",

abstract = "We have studied the structure and composition of a volcanic unit in the valley of the Despen River, on the southern slope of the East Tannu-Ola Ridge. The unit was earlier assigned to the Lower Devonian Kendei Formation. The new geological and geochronologi-cal data show that it resulted from explosive volcanism at 460–450 Ma. The Despen volcanic rocks formed in association with granitoids of the Argolik complex at the end of the accretion–collision stage of evolution of the Altai–Sayan region, in particular, the Tannu-Ola terrane. These are predominantly felsic ferroan metaluminous and weakly peraluminous nappe volcanic rocks resulted from the differentiation of tholeiitic basalts. Their REE patterns, like those of the Argolik granitoids, are flat in the HREE, show a distinct Eu anomaly, and suggest magma generation at shallow depths in the upper crust. The magmatic source was of subduction origin, as evidenced by the negative Ta–Nb anomalies in the multielement patterns and by εNd(T) = +3.1 to +5.6, and has a Neoproterozoic model age, TNd(DM-2st) = 0.94–0.69 Ga.",

keywords = "Ordovician, Petrogeochemical and isotope-geochemical (Sm–Nd) studies, Republic of Tuva, Volcanism, Zircon U–Pb (SHRIMP-II) dating",

author = "Vetrov, {E. V.} and Uvarov, {A. N.} and Vetrova, {N. I.} and Letnikov, {F. A.} and Vishnevskaya, {I. A.} and Zhimulev, {F. I.} and Andreeva, {E. S.} and Chervyakovskaya, {M. V.}",

note = "Funding Information: The work is done on state assignment of IGM SB RAS with a financial support by grants 19-05-00145, 18-35-20025, and 17-05-00819 from the Russian Foundation for Basic Research. Publisher Copyright: {\textcopyright} 2021, Novosibirsk State University.",

year = "2021",

month = jun,

doi = "10.2113/RGG20194167",

language = "English",

volume = "62",

pages = "633--647",

journal = "Russian Geology and Geophysics",

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Vetrov, EV, Uvarov, AN, Vetrova, NI, Letnikov, FA, Vishnevskaya, IA, Zhimulev, FI, Andreeva, ES & Chervyakovskaya, MV 2021, 'Petrogenesis of the despen volcanic rocks of the middle–late ordovician volcanoplutonic association of the tannu-ola terrane (Southwestern Tuva)', Russian Geology and Geophysics, том. 62, № 6, стр. 633-647. https://doi.org/10.2113/RGG20194167

Petrogenesis of the despen volcanic rocks of the middle–late ordovician volcanoplutonic association of the tannu-ola terrane (Southwestern Tuva). / Vetrov, E. V.; Uvarov, A. N.; Vetrova, N. I.; Letnikov, F. A.; Vishnevskaya, I. A.; Zhimulev, F. I.; Andreeva, E. S.; Chervyakovskaya, M. V.

В: Russian Geology and Geophysics, Том 62, № 6, 06.2021, стр. 633-647.

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

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AU - Vetrov, E. V.

AU - Uvarov, A. N.

AU - Vetrova, N. I.

AU - Letnikov, F. A.

AU - Vishnevskaya, I. A.

AU - Zhimulev, F. I.

AU - Andreeva, E. S.

AU - Chervyakovskaya, M. V.

N1 - Funding Information: The work is done on state assignment of IGM SB RAS with a financial support by grants 19-05-00145, 18-35-20025, and 17-05-00819 from the Russian Foundation for Basic Research. Publisher Copyright: © 2021, Novosibirsk State University.

PY - 2021/6

Y1 - 2021/6

N2 - We have studied the structure and composition of a volcanic unit in the valley of the Despen River, on the southern slope of the East Tannu-Ola Ridge. The unit was earlier assigned to the Lower Devonian Kendei Formation. The new geological and geochronologi-cal data show that it resulted from explosive volcanism at 460–450 Ma. The Despen volcanic rocks formed in association with granitoids of the Argolik complex at the end of the accretion–collision stage of evolution of the Altai–Sayan region, in particular, the Tannu-Ola terrane. These are predominantly felsic ferroan metaluminous and weakly peraluminous nappe volcanic rocks resulted from the differentiation of tholeiitic basalts. Their REE patterns, like those of the Argolik granitoids, are flat in the HREE, show a distinct Eu anomaly, and suggest magma generation at shallow depths in the upper crust. The magmatic source was of subduction origin, as evidenced by the negative Ta–Nb anomalies in the multielement patterns and by εNd(T) = +3.1 to +5.6, and has a Neoproterozoic model age, TNd(DM-2st) = 0.94–0.69 Ga.

AB - We have studied the structure and composition of a volcanic unit in the valley of the Despen River, on the southern slope of the East Tannu-Ola Ridge. The unit was earlier assigned to the Lower Devonian Kendei Formation. The new geological and geochronologi-cal data show that it resulted from explosive volcanism at 460–450 Ma. The Despen volcanic rocks formed in association with granitoids of the Argolik complex at the end of the accretion–collision stage of evolution of the Altai–Sayan region, in particular, the Tannu-Ola terrane. These are predominantly felsic ferroan metaluminous and weakly peraluminous nappe volcanic rocks resulted from the differentiation of tholeiitic basalts. Their REE patterns, like those of the Argolik granitoids, are flat in the HREE, show a distinct Eu anomaly, and suggest magma generation at shallow depths in the upper crust. The magmatic source was of subduction origin, as evidenced by the negative Ta–Nb anomalies in the multielement patterns and by εNd(T) = +3.1 to +5.6, and has a Neoproterozoic model age, TNd(DM-2st) = 0.94–0.69 Ga.

KW - Ordovician

KW - Petrogeochemical and isotope-geochemical (Sm–Nd) studies

KW - Republic of Tuva

KW - Volcanism

KW - Zircon U–Pb (SHRIMP-II) dating

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