Application Research for Geogas Prospecting in the Xinqu Gold Deposit, Gansu, China

With the increasing depletion and exhaust of minerals near the surface, the exploration of concealed ore has become increasingly important, gradually becomes a hot spot (Tang et al., 2011). In contemporary society, as an effective technical, geogas prospecting is a relatively new and nontraditional technique (Tong and Li., 1999; Cao et al., 2009), which is developed in the 1980s to apply in locating concealed ore deposits further (Tong et al., 1998). The first proof of the existence of geogas transport of matter from the bedrock to the ground surface was reached in a winter experiment above a concealed mineralization at Holmtjärn, a remote site in the Skellefte field in northern Sweden (Malmqvist et al., 1999). These days, Scholars research on geogas propescting in China for more than 20 years (Wang et al., 2008). The geogas anomaly is a probing indication of the concealed deposits at the depth of 300-400m.The method of geogas prospecting based on nuclear analysis, which according to the model of radon transport theory, and accumulation sampling, has matured and become promising method of geogas prospecting (Malmqvist et al., 1999; Wang et al., 2008; Tong et al., 1999). Nowadays we speculate that geogas matter is a form of migration of nanoparticles, which has determined its composition with Cu, Zn, Cr, Au, Al, V, Si, Cl, S, Ca, etc. Chengdu University of Technology have studied geogas transport and confirmed the existence of geogas matter transport (Cao, 2009). According to abnormal levels of ore-forming elements we can predict the presence of deep concealed ore by Inductively Coupled Plasma Mass Spectrometry (ICP-MS), Neutron Activation Analysis, Particle Induced X-ray Emission Spectroscopy, etc (Wang et al., 2008). 2 Geological Setting