The Songnen masiff is located to the east of the Central Asian Orogenic Belt. The existence and rather the scale and nature of the Precambrian crystalline basement is controversial. Based on recent study of zircon U-P...The Songnen masiff is located to the east of the Central Asian Orogenic Belt. The existence and rather the scale and nature of the Precambrian crystalline basement is controversial. Based on recent study of zircon U-Pb chronology, besides a minor number of Neoproterozoic strata, most of the so-called Precambrian metamorphic rock series, such as the Dongfengshan Group and the Zhangguangcailing Group, were formed in the Mesozoic and Paleozoic.展开更多
基金supported by the China Geological Survey (grant No.12120113053900,DD20160048-04,DD20160343-08,DD20160343-09)
文摘The Songnen masiff is located to the east of the Central Asian Orogenic Belt. The existence and rather the scale and nature of the Precambrian crystalline basement is controversial. Based on recent study of zircon U-Pb chronology, besides a minor number of Neoproterozoic strata, most of the so-called Precambrian metamorphic rock series, such as the Dongfengshan Group and the Zhangguangcailing Group, were formed in the Mesozoic and Paleozoic.
