Application of crossplot technique to identify lithology of igneous rocks in Santanghu Basin

Santanghu Basin is located in Xinjiang, northwest China, where developed huge area and various system of igneous rock formations. The conventional log data and ECS (Elemental Capture Spectroscopy) data are analyzed. Combined with the rock section analysis and sample log data, the log response characteristics of basalt, andesite, tuff, diabase, sandstone and mudstone in the study area are summed up. The physical quantities and parameters sensitive to igneous rock lithology are selected to make crossplot for lithology identification. A set of lithologic chart suitable for this area is set up and the logparameters for different lithologies are determined.