%0 Journal Article
%T Zircon U-Pb dating of basement gneisses in the super-large Bayan Obo REE-Fe-Nb deposit, Inner Mongolia<br>
%A WANG Kaiyi
%A <br>
%J 科学通报(英文版)
%D 2002
%I 
%X Zircon U-Pb ages have been determined for basement gneisses in the Bayan Obo REE-Fe-Nb deposit. On the U-Pb concordia diagram data of three samples yield upper intercept ages of 1948-1917 Ma. Thus, these basement gneisses are of Paleoproterozoic. Rock association of these basement gneisses includes tonalite, syenite and paragneiss, not belonging to a sedimentary package. It is more appropriate to consider this association as a basement complex rather than a stratigraphic "Group".
%K basement complex
%K zircon U-Pb age
%K Bayan Obo<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=5B8CDE4BF5349F328743C0AEBDA25630&yid=C3ACC247184A22C1&vid=F4B561950EE1D31A&iid=38B194292C032A66&sid=B78CD622C1934236&eid=28F9D9CF04F424FF&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=8