NEW RECOGNITION ON THE"META-ACID VOLCANIC ROCKS OF THE JIANGXIIAN GROUP"IN THE CORE REGION OF THE HUJIAYU-SHANGYUPO ANTICLINE OF THE ZHONGTIAO MOUNTAINS

Through a study of the petrography. petrology and structural geology, the "meta-acid volcanic rocks or metapotassic rhyolite" over the core region of the Hujiayu-Shangyupo anticline are considered to he hypahyssal felsitic porphyry bodies intruded in the middle-late Zhongtiaoan stage and cannot be regarded as the same stratigraphic unit as meta-acid volcanie rocks of the Jiangxian Group in the Tongknangyu area in the northern part of the area.