Deformation and metamorphic characteristics of Carboniferous-Permian coal-bearing formation and related geological hazards in Xishan (Western Hills), Beijing;

Analysis of Sedimentary Environment and Ascertainment of Carboniferous-Permian Lithostratigraphic Unit in South Area of Beishan, Xinjiang;

Geochemistry of the Carboniferous-Permian post-collisional granitic rocks from Tianshan;

The Cathaysia flora, which mainly flourished during the Permo-Carboniferous time in East Asia, has been held consistently in geology and palaeontology at home and abroad.

n the basis of new viewpoint of stratigraphic correlation and by using highresolution map-making technology, a series of maps about transgressive rangs and directionshave been finished through the detailed study marine beds(limestons and marine mudstons) distributions in Permo-Carboniferous System of North China.

Igneous rock intrusion and formation mechanism in coal measures strata of Huabei Permo-Carboniferous Period;

In order to clarify the time space distribution law of the seams of Permo-Carboniferous Period in Pingdingshan, Yuzhou and Ruzhou Mining Areas, the modern stratigraphy, sedimentology, sequence stratigraphy, and the geophysics exploration theory and method were applied to study of the comparison among the coal measures in the three coalfields.