PETROGENIC AGE OF MENGENTAOLEGAI INTRUSIVE BODY IN INNER MONGOLIA:LA-ICP-MS zircon U-Pb Isotopic Geochronology
ZHANG Ming1, FU Jun-yu2, XIAO Jian-wei1, LI Wei3
1. Inner Mongolia Institute of Geological Survey, Hohhot 010020, China; 2. Shenyang Institute of Geology and Mineral Resources, Shenyang 110034, China; 3. Inner Mongolia Geological Exploration Co. Ltd., Hohhot 010020, China
Abstract：The Mengentaolegai intrusive body, emplaced in the Late Paleozoic epimetamorphic series in Xingan-Mongolia orogenic belt, is lithologically classified into medium-fine-grained tonalite, granodiorite and monzogranite, with the mineral assemblages and petrochemical characteristics of S-type granite. The LA-ICP-MS zircon U-Pb isotopic age dating results of the granodiorite and monzogranite are 234±1 Ma and 230±1 Ma, respectively, in Middle Triassic, which represents the invasion time of the Mengentaolegai intrusive body.
2013, Vol. 22 
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