Aiwan gold deposit is located in the middle part of Lintan—Lixian—Zhashui geosynline zone.

Study on geological feature of YuErYa Gold Deposit;

Based on ore body occurrence pattern bellow 205m level in Yuerya gold deposit is put forward in the paper that further ore exploration to depth should be directed to contacts of the buried batholith,surrounding of apophyses extending long distance into the country rock,top of the red granite and where lithology is changed,intersection of foot wall of dyke and the ore-host structures,etc.

The Laowan gold deposit in Henan Province,one of the most important gold deposits in the Qinling-Dabie orogenic belt,is hosted within Proterozoic metamorphic rocks,controlled by the Lanwan NWW-trending shear zone and related to the nearby Laowan Yanshanian granite.

The Laowan gold ore belt is an important component part of the Tongbai-Dabieshan(northern slope) gold-silver metallogenic belt,and the Laowan gold deposit is one of the major deposits in this belt and also one of the important large-size metamorphic clastic rock gold deposits in China.

The materias source base and material condition of mineralization, the main source of rare earths element in ore of Laowan Gold Deposit are analyzed.

This paper analyses the self-igniting phenomena and poisonous gas leakage in Wajinwan Coal Mine, Datong Coal Group and discusses the necessity of reforming ventilation system.