Geochemical Characteristics and Geological Significances of the Dagushi Formation Siliciclastic Rocks,the Paleoproterozoic Xiong er Group from the Southern North China Craton;

Petrogenesis and Tectonic Setting of the Paleoproterozoic Xiong er Group in the Southern Part of the North China Craton:a Review;

Geological characteristics of paleovolcanic edifices in the Xiong er Group, Ruyang County, Henan, and their significance;

Study of Isotopic Geochronology of Xionger Group Henan Province, China;

Based on a vast mount of data on regional geology, petrology and geochemistry, the authors present a number of major data about the Xionger Group, and expound the authors s views about the points at issue.

The Xionger Group in both Shaanxi province and western Henan province belong to Southern Margin of North China plate, and formed by Middle Proterozoic volcanic of fissure acfivity.

Hydrothermal mineralization of Au (Ag)-polymetallic ore deposit in the volcanic rock series of the Xiong'er Group;

Geochemical Characteristics and Sedimentary Environments of Cherts from the Paleoproterozoic Xiong′er Group in the Southern Part of the North China Block;

The albitization of the volcanic rocks of the Xiong′er Group,western Henan,was studied based on rock thin section observations and electron-probe microanalysis(EPMA).

This paper deals with the charcteristics of the regional metamorphism,dynamicmetamorphism and hydrothermal metamorphism of Xiong er group volcanic rocks in Machaoyin fault zone and its northern side.