Basement lithology lithofacies identification in the Kunse depression, Yili Basin: using the high-precision gravity,magnetic and electric data

Basement lithology lithofacies identification is an important factor in the research of the structure,evolution,sedimentary and the hydrocarbon distribution.It is difficult to identify the lithofacies of the basement and the igneous rocks in the complicated area,for the structures are strongly deformed,the basement buried deep and the lithofacies is complex.However,it is a feasibility study to identify the lithofacies of the basement and the igneous rocks using joint method of gravity,magnetic,and electricity,because there's the different density magnetism and resistivity characteristics and combination characteristic in the various igneous rocks,respectively.A computer assisted method to identify the lithofacies of the basement igneous rocks is used in this paper,which is more efficient than the manual ones.Using this method and gravity,magnetic,and electricity combination characteristics,the lithology and lithofacies of the project area are divided.They have the eruption and the intrusive lithofacies etc.The lithologies are the middle acidic intrusive and the middle acidic eruptive rocks etc.The synthetic interpretation of the gravity,magnetic,electricity is an effective combination method to study the basement.