摘要
The intermediate hypabyssal intrusive rocks were found near the east piedmont of Quanshan Mountain in Xuzhou in Cambrian system. Through optical microscopic observation and geochemistry analysis:it was dioritic porphyrite, and the content of SiO2 (61.68%), Na2O (3.80%), K2O (3.07%), higher micro elements of Ba, Sr, W, enriched LREE, poor HREE and positive Eu abnormal. The standard partition mode of rare earth element chondrite was quite similar to Banjing dioritic porphyrite and granodiorite porphyrite. It was concluded that the geochemical characteristics were related to the magma activity of Banjing rock mass.