【摘 要】
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Objective 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 crystall
【机 构】
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College of Earth Sciences,Jilin University,Shenyang Institute of Geology and Mineral Resources,CGS,S
【出 处】
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Acta Geologica Sinica(English Edition)
论文部分内容阅读
Objective 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
Objective 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
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