Since the volcanics has a quite complicated composition

it is difficult to evaluate the content of different minerals in vlcanics by log data.The volcanics of the Jiamuhe Forma-tion of Permian System

5-8 distrcts

Karamay Oilfield is divided into volcanic breccia

basalt and rhyoporphyry based on the data of cross section

and distinguished using cross-plots.The paper also provides the values of density

neutron porosity

cross section index of effective photoelectric absorption and uranium

thorium

potassium contents.