CHARACTERISTICS OF GRAVITY AND MAGNETIC FIELD AND THEIR RELATIONSHIP WITH URANIUM MINERALIZATION IN NORTHERN GUANGXI AREA

The characteristics of gravity and magnetic field, deep-seated structures and their relationship with urnaium mineralization in Northern Guangxi are investigated. Especially, based on geophysical investigation, the distinguishing features of uranium ore-forming are discussed, involved with the uranium source body, the heating force and mechanical force of granite magma acted on uranium mineralization , the deep-seated geological process, the hydrothermal activity, the formation environments of granite-type uranium deposit, the source of pyrite and its influence on uranium mineralization, the uranium ore-forming of Sinian-Cambrian periods and Devonian period formations, and the simple model of uranium ore-forming. On the basis of the relationship of uranium mineralization with geophysical field,as well as the ore-forming geological environments inferred by gravity and magnetic field investigation , the physical-geological model is established in order to predicate uranium prospect.