Abstract：The Late Devonian intrusive rocks in Jirigalangtu, Inner Mongolia are distributed on the northern side of the Erlian-Hegenshan connect zone, with rock association of quartz diorite, tonalite and granodiorite. Lithochemically, the rocks are assigned to calk-alkaline series, with contents of SiO2 for 64.23%-74.47%, Al2O3 for 13.59%-16.26%, TiO2 for 0.19%-0.76% and Na2O+K2O for 6.28%-8.15%, with A/CNK ratio of 1.06-1.21, belonging to peraluminous granites. The An-Ab-Or diagram shows the T2G1G2QM assemblage, which belongs to TTG type. The trace elements display the characteristics of volcanic arc granite. The rare earth elements are characterized by high fractionation and deficient HREE. The characteristics of the intrusive rocks reflect typical TTG resulted from the subduction of oceanic plate towards continental plate. The single zircon U-Pb isotopic age of the granodiorite is 361.1±1.0 Ma (Late Devonian). Therefore, the matching time of Sino-Korean plate and North China plate should not be earlier than Late Devonian.
白立兵, 邓晋福, 陶继雄. 内蒙古吉日嘎朗图晚泥盆世侵入岩特征及其构造意义[J]. 地质与资源, 2013, 22(2): 108-113.
BAI Li-bing, DENG Jin-fu, TAO Ji-xiong. CHARACTERISTICS AND TECTONIC SIGNIFICANCE OF THE LATE DEVONIAN INTRUSIVE ROCKS IN JIRIGALANGTU, INNER MONGOLIA. GEOLOGY AND RESOURCES, 2013, 22(2): 108-113.
2013, Vol. 22 
辽公网安备 21010502000112号