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| 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 |
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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.
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Received: 14 May 2012
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2013, Vol. 22 
