论文部分内容阅读
1.ObjectivesrnWithin the Northern-Mongolian-Transbaikalian Rift system, bimodal volcanic associations with felsic agpaitic rocks are widespread, often accompanied by alkaline granites plutons.There are two segments in the Rift system structure-Northern-Mongolian with length of 600 km and Western-Transbaikalian with length of 800 km on latitude.Most western appearances of alkaline granites and bimodal magmatism are Bat-Tsengel, Upper-Hanui and Orkhontplutons (Vorontsov AA et al., 2007).