中国河北省張家口地区万全県漢淖坎玄武岩の地球化学的研究

Geological, petrographical and geochemical characteristics of the Baidrag granite pluton from the Tsagaan Tsahir Uul area can be summarized as following; The granitic complex is composed of two types of granites, distinguished by its biotite content. The modal abundance of biotite varies gradually between the two rock types. Major and trace element geochemical characteristics of the granitic rocks are similar, but they differ by SiO_2 content. FeO, CaO, Sr, and Ba contents of the biotite granite are slightly higher than those of the two mica granite. Both granites are medium to high potassium calc alkaline, and have peraluminous chemical features. Studied mineralogical composition and major and trace element geochemistry show that the granitic rock of Tsagaan Tsahir Uul area has volcanic arc granite (VAG) characteristics.論文Articl