During last three decades, the Wargal and Chhidru Formations in the Salt Range, Pakistan and their equivalents in the Himalayan region have been considered by many authors to be Middle Permian (Guadalupian) in age.

Selective Comminution and Liberation Mechanism of Pyriterich Kaolinite;

The kaolin in Weibei is pure,idiomorphism of kaolinite is not so good,but crystallization is in order;,while the kaolin in Fugu is also pure,only little impurity,fine grained,good crystallized,and is a kind of high quality kaolin resource.

For promoting the production quality and enlarging the utilization of the resource of kaolinite, in technical flow of producing kaolin, we plan to dispose a kind of impeller deironing device different from the makeup principle of present magnetic separating device.

Geochemical characteristics of rare earth elements in kaolin rock from Daqingshan coalfield;

The authors studied the petrology, mineralogy and geochemistry of kaolin rock in Late Paleozoic coal measures in northern Shanxi.

The paper presents the geochemical characteristics of trace elements, REE and oxygen isotopes of kaolin rocks.

Briefly introduced kaolin resources exploration methodology in Jungar coalfield,Inner Mongolia.

Datong kaolin resource depot in C-P period coal series strata which is chief coal gripping gangue and bed's roof and floor kaolin.

The author introduced the distribution features of kaolin deposits in coal measures in western Henan.