More than 60 anomalous places of non-hydrocarbon gas
including CO
2
N
2
H
2
S
Ar
Rn etc
are discovered in Guangdong Province.The distributionof anomaly zones of non-hydrocarbon gas closely related to fracture zones.9 anomaly zones can be divided into 3 groups:NE-NNE anomaly zones;NW anomaly zones;EW anomaly zones.The gas anomalies can be divided intosurface gas seepages
underground gas beds
water-soluble gas shows and water-soluble gas beds.The formation of the anomalies may be related to degassing ofthe globe during the Meso-Cenozoic
especially in the Middle and Late Ju-rassic and the Eocene.