Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Isotopic Characteristics and Its Significance of the Xinlin Town Pluton,Great Hinggan Mountains

ZHANG Yan-long1,GE Wen-chun1,LIU Xiao-ming2,ZHANG Ji-heng11.College of Earth Sciences,Jilin University,Changchun 130061,China2.Department of Geology/State Key Laboratory of Continental Dynamics,Northwest University,Xi'an 710069,China  
The Xinlin Town pluton locates in the northern Great Hinggan Mountains.Lithologically,it comprises granodiorite,adamellite,quartz-monzodiorite and alkaline-feldspar granite,with locally fine-grained gabbroic and dioritic enclaves.Petrological and geochemical characteristics indicate that the pluton is high-K calc-alkaline I-type granite.Zircon LA-ICP-MS U-Pb dating of two granodiorites yielded emplacement ages of(132±3)Ma and(131±3)Ma.The ages indicate that the pluton was the product of the Early Cretaceous magmatic event.Though Sr-Nd isotopic compositions of the samples are relatively uniform,their εHf(t) values are relatively varied,ranging between 1.32 and 8.32;the yielded Nd and Hf model ages are Neoproterozoic.The isotopic data indicate that the granitic magma mainly originated from the juvenile Neoproterozoic accreted crustal materials with the involvements mantle components.The isotopic characteristics indicate that the Erguna terrain accreted in Neoproterozoic at least,but the Xing'an terrain accreted in Neoproterozoic-Phanerozoic.It suggests that they have the different tectonic natures and evolvement history.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved