A preliminary study of magnetic characterization and ore-prospecting significances of intersection-type uranium deposit in Xiazhuang field

Summary To further characterize the material source and metallogenic mechanism of intersection-type uranium deposit, uranium ore and its wall rocks, diabase and granite samples are first examined by systematic rock magnetic methods. Experimental results reveal that large pseudo-single domain (PSD) and multi-domain (MD) magnetite are the dominant magnetic field carriers for diabase, while granite contains much less and smaller magnetite, which are in superparamagnetic (SP) and single-domain (SD) states. Furthermore, the uranium ore are suggested to be dominated by superparamagnetic (SP) and single-domain (SD) magnetite. Compared with diabase, the magnetic remanence of uranium ore is much lower, but showed much higher coercivity. Magnetic properties of uranium samples exhibit much greater variability than diabase and granite, which might reflect the complicated contact metasomatism and reduction effects between diabase and granite. In all, rock magnetism investigation of intersection-type uranium deposit provides a better understanding of interactions between rocks, and the study of remanence may also pave the way for a regional magnetic survey on the ground.