The Toksko-Algomin igneous complex of the Dzhugdzhur-Stanovoi folded region: Age and geodynamic setting

Pattern and kinematic polarity of late Mesozoic extension in continental NE Asia: Perspectives from metamorphic core complexes

“…During Late Jurassic and Early Cretaceous time, the contractional tectonic regime was transformed into an extensional one, and all the abovementioned regions have experienced intensive Mesozoic extensional deformation superimposed on previous Mesozoic contractional events [e.g., Davis et al , 1998a, 2001; Darby et al , 2004; Davis and Darby , 2010]. Voluminous late Mesozoic igneous rocks, many of which show alkaline features, intruded into these tectonic units, particularly in the Russian Far East [e.g., Sorokin et al , 2004, 2005; Buchko et al , 2005; Sotnikov et al , 2005; Sal'nikova et al , 2006; Mel'nikov et al , 2009; Kotov et al , 2009] and NE China [ Wu et al , 2005a, 2005b; Yang and Wu , 2007]. Late Mesozoic sedimentary basins with extensional settings are also widespread in the region and most of them are located in east Mongolia and east China [e.g., Zorin , 1999; Ren et al , 2002; Meng , 2003; Meng et al , 2003].…”

Tok-Algoma magmatic complex of the Selenga-Stanovoi Superterrain in the Central Asian fold belt: Age and tectonic setting

“…According to the results of the U-Pb geochrono logical investigation, the granitoid plutons of the SSS Tok-Algoma Complex were formed in the Middle Jurassic rather than in the Early Archean, as is condi tionally suggested [1], and the Triassic, as was estab lished for granitoids of the DSS Tok-Algoma Com plex [2]. Thus, the age of the regional amphibolite facies metamorphism manifested itself in the Ust' Gilyui rock sequence and superimposed on TokAlgoma granitoids is the Mesozoic (post-Middle Jurassic), as is established for DSS [10], rather than the Early Precambrian [1].…”

“…In the most current geological maps, they are referred to the Early Archean Tok-Algoma Complex [1, etc.]. However, their age was estimated at Early Mesozoic (238 ± 2 Ma) in the course of the U-Pb geochronological investiga tion of the DSS rocks [2]. In this connection, the question concerning the age of granitoids in the SSS complex arises.…”

Age of the Au-Ag mineralization and its relation to the magmatism at the Dess occurrence, North Stanovaya metallogenic zone (southeastern framing of the North-Asian Craton)

“…This can be clearly exemplified by the Dzhugdzhur-Stanovoi Superterrane. Recent works have shown that several geological complexes previ ously considered as Precambrian are Late Paleozoic and Mesozoic in age, while the final stage of the amphibolite facies regional metamorphism is dated as the Early Cretaceous [2,3,8,10,18,19, and others]. Moreover, the 40 Ar/ 39 Ar and U-Pb dating has specified the age of the granitic rocks from the Tynda-Bakaran complex as 138-124 Ma [9,20].…”