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| CHRONOLOGY AND ITS GEOLOGICAL IMPLICATION OF THE GRANITES IN HADUOHE-AERBENGELE AREA, INNER MONGOLIA |
| ZHANG Fu1, ZHENG Ping1, JIA Lin-zhu2 |
1. No. 7 Institute of Geological Exploration, Inner Mongolia Bureau of Geology and Mineral Resources, Hohhot 010020, China;
2. Inner Mongolia Institute of Geological Survey, Hohhot 010020, China |
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Abstract Geochronogic study on the previously decided Permian granites in Haduohe-Aerbengele area, Inner Mongolia obtains the U-Pb SHRIMP zircon ages of 133.2±1.7 Ma and 127.0±2.0 Ma for granite and granite-porphyry, respectively, suggesting a Cretaceous age. The lithogeochemical study shows that both the granite and granite-porphyry are calc-alkaline, belonging to S-type granite. The rare earth elements are well fractionated, without significant Eu anomaly. The rocks present no evident differences to the typical granite (SI-type) in the region, showing a complex tectonic setting of late collisionorogeny during Late Yanshanian stage. Multiple collision-orogeny movements took place from Variscan to Late Yanshanian in the region. The magmatic activities are related to the transition of Paleo-Asia tectonic domain and the superposition of marginal-Pacific tectonic domain.
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Received: 13 July 2012
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CHEN Hui-jun, CUI Tian-ri, QIAN Cheng, LI Lin-chuan, CHEN Jing-sheng, LI Wei, WU Xin-wei, JIANG Bin, SI Qiu-liang, QIN Tao, TANG Zhen, ZHANG Yu-jin, GUO Wei. ZIRCON U-Pb GEOCHRONOLOGY OF BASHENGHE PLUTON IN NORTHERN DAXINGANLING MOUNTAINS: Geological Implications[J]. GEOLOGY AND RESOURCES, 2019, 28(5): 405-412. |
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2012, Vol. 21 
