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

Abstract

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.