The porphyroblasts being of syntectonic origin have attained the following features:their growth is correlated with deformation intensity,content of sericite and size of the crystal,and the porphyroblasts have their distinct crystal forms and retain the schistosity of groundmass.

This paper introduces the volcanoes distribution and movement characteristics in Tengchong region and based upon description of volcano types, topographical features and environmental characteristics method is proposed for geological genesis analysis.

Reflectance on the origin of deformed coal in Ⅱ_1 coal bed in the coal field of west Henan province;