GEOGAS ANOMALY AND MECHANISM IN XUANHAN GAS FIELD

Geogas prospecting is an effective method for the location of the concealed gold deposit. In order to popularize this method, many experiments have been made in the known gas fields. The geogas prospecting has thus revealed the ring fracture structure 4 000 m deep and the location of the geogas anomaly above the ring fracture structure perpendicular to each other. In addition, two groupsof trace element anomalies in the soil, indirectly indicate the gas_bearing range. Finally, several kinds of high_resolution scanning-probe microscopes have been employed to observe the geogas anomaly. The results show that the substance deposited on the collectors occurs in the forms of nano-scale particles and their aggregate, providing us with the evidence for the research into the mechanism of the geogas anomaly.