7 research outputs found

    Giáo trình xác suất - thống kê

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    219 tr. ; 21 cm

    CÁC THÀNH TẠO PHUN TRÀO VÀ XÂM NHẬP MESOZOI MUỘN TUYẾN A LƯỚI - ĐẮK RÔNG

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    Dackrong-Aluoi Volcanic line, West of Quang Tri and Thua Thien-Hue provinces, includes basalt, andesite, dacite, riolite and granite-porphyritic granophyritic shallow intrusive rocks.According to geological and petrological characteristics, they belong to effusive-explosivefacie, truly volcanic and hypabyssall facie o ffracture type of early Cretaceous age.In chemical aspect, the rocks form high potassium calc-alkal ine series in the activecontinental margin of Andes Type.Volcanic suffered strong hydrothermal metamorphosed profilitisation, bersitisation and argilitisation that related to silver-gold and polymetal mineralization.Small intrusive bodies and light color porphyritic granite Dikes which are strongly weathered, related to kaolinite deposits with high quality and medium size
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