Sm-Nd Age of the Sviatonossites of the Sviatoi Nose Peninsula (Eastern Baikal Region)

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

Sviatonossites are syenites with andradite garnet, a rare type of igneous rocks described by P. Eskol in 1913 on the Sviatoy Nose peninsula (Lake Baikal). Due to the absence of zircon in the rocks, which makes it possible to date the age of rocks using a reliable U-Pb method, geochronological studies of Sm and Nd by the gross composition and minerals were carried out. As a result, 2 estimated periods of the formation of the Saints were obtained. According to the gross composition and four minerals (garnet, pyroxene, potassium feldspar, apatite), the age was 262 ± 21 million years (SQUAW = 1.6), and according to the gross composition and garnet — 274 ± 25 million years (SQUAW = 0.0). The results obtained coincide with the boundaries of the manifestation of tectonic-metamorphic and magmatic processes associated with the formation of the East Trans-Baikal segment of the Central Asian (Mongol-Okhotsk) folded belt. Sviatonossites in complexes of mobile (folded) belts framed by the Siberian craton are indicator rocks reflecting the manifestation of mantle-crustal interaction.

Толық мәтін

Рұқсат жабық

Авторлар туралы

V. Levitsky

Vinogradov Institute of Geochemistry of the Siberian Branch of the Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: vlevit@igc.irk.ru
Ресей, Irkutsk

V. Kovach

Institute of Geology and Geochronology of the Precambrian of the Russian Academy of Sciences

Email: vlevit@igc.irk.ru
Ресей, Saint Petersburg

A. Kotov

Institute of Geology and Geochronology of the Precambrian of the Russian Academy of Sciences

Email: vlevit@igc.irk.ru

Corresponding Member of the RAS

Ресей, Saint Petersburg

L. Reznitsky

Institute of the Earth’s Crust of the Siberian Branch of the Russian Academy of Sciences

Email: vlevit@igc.irk.ru
Ресей, Irkutsk

I. Levitsky

Vinogradov Institute of Geochemistry of the Siberian Branch of the Russian Academy of Sciences

Email: vlevit@igc.irk.ru
Ресей, Irkutsk

N. Zagornaya

Institute of Geology and Geochronology of the Precambrian of the Russian Academy of Sciences

Email: vlevit@igc.irk.ru
Ресей, Saint Petersburg

Әдебиет тізімі

  1. Eskola P. On the igneous Rocks of Sviatoy Noss in Transbaikalia // Overs. Finska Vetensk. Soc. Forhandl. 1921. Bd. LXIII, avd A. № 1. 100 p.
  2. Петрова З. И., Жидков А. Я., Левицкий В. И. и др. Святоноситы п-ва Святой Нос (Байкал) // Известия АН СССР. Сер. Геол. 1981. № 3. С. 26–40.
  3. Литвиновский Б. А., Занвилевич А. Н., Ащепков И. В. О природе байкальских святоноситов // Известия АН СССР. Сер. геол. 1986. № 2. С. 31–44.
  4. Левицкий В. И., Петрова В. И. Эволюция вещества при формировании святоноситов // Геохимия. 1982. № 10. C. 1525–1530.
  5. Jacobsen S. B., Wasserhurg G.J. Sm-Nd Evolution of Chondrites and Achondrites // Earth and Planetary Science Letters. 1984. 67. P. 137–150.
  6. Ludwig K. R. Isoplot for MS-DOS, version 2.5 // U.S. Geol. Survey Open-File Rept. 88–557. 1991. 64 р.
  7. Цыганков А. А., Бурмакина Г. Н., Хубанов В. Б., Буянтуевa М. Д. Геодинамика позднепалеозойского батолитообразования в Западном Забайкалье // Петрология. 2017. Т. 25. № 4. С. 395–418.
  8. Мазукабзов А. М., Донская Т. В., Гладкочуб Д. П., Падерин И. П. Геодинамика Западно-Забайкальского Сегмента Центрально-Азиатского складчатого пояcа в позднем палеозое // Геология и геофизика. 2010. Т. 51. № 5. С. 615–628.
  9. Donskaya T. V., Gladkochub D. P., Mazukabzov A. M., Ivanov A. V. Late Paleozoic – Mesozoic subductionrelated magmatism at the southern margin of the Siberian continent and the 150 million-year history of the Mongol-Okhotsk Ocean // Journ. Asian Earth Sci. 2013. V. 62. P. 79–97.
  10. Kuzmin M. I., Yarmolyuk V. V., Kravchinsky V. A. Phanerozoic hot spot traces and paleogeographic reconstructions of the Siberian continent based on interaction with the African large low shear velocity province // Earth-Science Reviews. 2010. V. 102. P. 29–59.
  11. Цыганков А. А. Позднепалеозойские гранитоиды Западного Забайкалья: последовательность формирования, источники магм, геодинамика // Геология и геофизика, 2014. Т. 55. № 2. С. 197–227.
  12. Плюснин Г. С., Левицкий В. И., Пахольченко Ю. А., Кузнецова С. В. Rb‒Sr-возраст и генезис сиенитов Быстринского массива в Юго-Западном Прибайкалье // Доклады АН СССР. 1991. Т. 316. № 2. С. 440–443.
  13. Левицкий В. И., Резницкий Л. З., Котов А. Б., Ковач В. П., Сальникова Е. Б., Макагон В. М., Конев А. А., Сандимирова Г. П. Возраст формирования и изотопные характеристики святоноситов Байкальской провинции / Изотопное датирование процессов рудообразования, магматизма, осадконакопления и метаморфизма (Материалы Всероссийcкой конференции “Изотопное датирование” – III. 6–8 июня. Москва). М.: ИГЕМ, 2006. С. 153–158.

Қосымша файлдар

Қосымша файлдар
Әрекет
1. JATS XML
2. Fig. 1. Schematised geological map of the Svyatoy Nos Peninsula (shown with an arrow on the inset), by [3]. 1 - Quaternary sediments; 2 - metamorphic rocks of the Svyatoy Nos series; 3 - granitoids, undivided by composition and age; 4 - manifestations of svyatonosites (1 - Eskolsky massif, 2 - Markovsky massif). The asterisk shows the place of sample CH-57 selection

Жүктеу (33KB)
3. Fig. 2. Sm-Nd-isochrones for sanctonosotite СН-57. (a) for four minerals and the rock as a whole; (b) for garnet and the rock as a whole. Symbols in Table 2

Жүктеу (10KB)

© Russian Academy of Sciences, 2024