Based on the geological,petrological and geochemical characteristics,the SHRIMP zircon U-Pb ages, of the Mashan and Xueshan granitoids,two main geological units of the Yishui Magmatic Complex,are reported.

The Xueshanhe metamorphic group, belonging to the Mesozoic lower metamorphic series, and whose major minerals are quartz, biotite and muscovite, is exposed at the eastern side of the middle-northern part of the Lancangjiang fault in western Yunnan.

U-Pb isotopic dating of basalt from the Gajinxueshan Group in the Jinshajiang tectonic belt;

The paper analysed geological characteristics of Hongshan igneous rock mass and its extended range in the western Hongshan predicting area and studied the influencing extent to coal seams in the Beizhang exploration area and neighbouring Jiaoyao coalmine.

Gray Relevancy Theory applied in assessment of rock body quality of mine;