Sehepu area is located at the east of Indosinian fold belt in the southern Qinling, Shaanxi, southern of Fengzheng ~Shanyang fault .Cryptoexplosive breccia is widely developed in this region. It is controled by the Fengzheng~Shanyang fault and its secondary fracture combined with Yunzheng~Lengshuigou~Niuerchuan anticlinorium. Cryptoexplosive breccia is a set of clastic rock combination formed by magma eruption in hyper-gene-upperhypergene conditions(0.5~3km) near ground surface.Cryptoexplosive breccia can be further divided into magmatic cryptoexplosive breccia、mixed cryptoexplosive breccia、hydrothermal cryptoexplosive breccia. According to the preliminary research of geology，petrology，geochemistry，trace elements and rare earth elements et al.We think they are symbiosis on space, with some zonality and transition of each other. The alteration and mineralization are mainly existed in hydrothermal cryptoexplosive breccia, rarely in mixed cryptoexplosive breccia and less in magma cryptoexplosive breccia.The types of alteration and mineralization contain pyritization, carbonatization, silicification, specularite-quartz-ankerition, chalcopyrition, malachition et al. Hydrothermal cryptoexplosive breccia is ore-bearing rock and the main exploration object for copper. And Hg, Sb and As can be used as indicator elements for prospecting of copper.