2007
DOI: 10.1016/j.rgg.2006.12.010
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Types of paleoisland arcs and back-arc basins in the northeast of the Paleoasian Ocean (from geochemical data)

Abstract: Based on a comparative study of geochemistry of metavolcanics and metasediments of two large terranes, Baikal-Muya and Khamar-Daban-Ol’khon, as well as of the Baikal-Patom passive margin and Olokit accretionary wedge, we have recognized volcanosedimentary series accumulated in the settings of island arcs of different maturities and fragments of volcanosedimentary complexes of back-arc and fore-arc basins. Metabasalts of the Medvezhy and Tyya Formations in the basement of passive-margin sequence and the Olokit … Show more

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Cited by 36 publications
(11 citation statements)
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“…In the Baikal area, the controversial nature and origin of the Ikat-Barguzin/Baikal-Muya zones (Fig. 2) have been interpreted by various palaeotectonic models, either as a displaced or exotic microcontinent and/or as an island arc accreted to Siberia in the Neoproterozoic or Palaeozoic (Khomentovskii and Postnikov, 2001;Khain et al, 2003;Vernikovsky et al, 2004;Fedorovsky et al, 2005;Belichenko et al, 2006;Dobretsov and Buslov, 2007;Makrygina et al, 2007;Rytsk et al, 2007;Gladkochub et al, 2008;Zorin et al, 2009;Rytsk et al, 2011). Although their precise timing remains unclear, there were probably two main accretionary/collisional events: (1) in the Vendian the obduction of an island arc (i.e.…”
Section: Barguzinmentioning
confidence: 99%
“…In the Baikal area, the controversial nature and origin of the Ikat-Barguzin/Baikal-Muya zones (Fig. 2) have been interpreted by various palaeotectonic models, either as a displaced or exotic microcontinent and/or as an island arc accreted to Siberia in the Neoproterozoic or Palaeozoic (Khomentovskii and Postnikov, 2001;Khain et al, 2003;Vernikovsky et al, 2004;Fedorovsky et al, 2005;Belichenko et al, 2006;Dobretsov and Buslov, 2007;Makrygina et al, 2007;Rytsk et al, 2007;Gladkochub et al, 2008;Zorin et al, 2009;Rytsk et al, 2011). Although their precise timing remains unclear, there were probably two main accretionary/collisional events: (1) in the Vendian the obduction of an island arc (i.e.…”
Section: Barguzinmentioning
confidence: 99%
“…This is corroborated by the age of the youngest ophiolites in the Baikal‐Muya belt, which indicate that they were obducted not earlier than 650 Ma, i.e., at the Riphean‐Vendian boundary [ Delvaux et al , 1995; Dobretsov et al , 2003] (Figure 4). In the case of the Patom area, the terrane colliding with the Siberian platform is the Barguzin microcontinent to the southeast [ Belichenko et al , 2006; Gordienko , 2006; Makrygina et al , 2007]. Its northern border corresponds to the Baikal‐Muya ophiolites belt and follows the arc of the Patom range.…”
Section: Sedimentary Record and Geodynamic Evolution Of The Patom Regionmentioning
confidence: 99%
“…Мы предполагаем, что субдукционная зона названной дуги падала под Байкало-Патомскую пассивную окраину Сибирского континента, а ее фронтальная часть была связана с образованием Баргузино-Витимского спредингового океанического бассейна, реконструируемого на основе находок офиолитов ранненеопротерозойского возраста. По геохимическим параметрам метабазальты Нюрундюканской дуги попадают в поле базальтов океанических островных дуг и сопоставляются с породами описанной ниже Келянской островодужной системы энсиматического типа [Makrygina et al, 2007;Gordienko et al, 2009].…”
Section: Fig 14unclassified
“…Эти породы отличаются высокими концентрациями Sr, K, Th, Ti, P и низким содержанием Nb, Ce, Zr и Cr, что характерно для зрелых островных дуг. Исследования вещественного состава пород Таланчанского сектора островодужной ассоциации проводились в Восточном Прибайкалье [Makrygina et al, 2007]. Было показано, что амфиболовые, амфибол-биотитовые и биотит-амфиболовые гнейсы и сланцы таланчанской свиты реставрируются как вулканиты островодужного типа, аналогичные ангинским метабазальтам и метаандезитам.…”
Section: венд-раннепалеозойские островные дуги и проявления плюмовогоunclassified
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