Study on mineral occurrence states and microzone characterization guided by X-CT

There is a general lack of understanding of the internal structure and mineral distribution of the cores in the process of conventional rock and ore identification. As a non-destructive analysis and testing method, X-CT has attracted much attention in the field of earth science in recent years. Taking the core samples of Xiangshan volcanic rock type and Saudi Arabia alkaline granite type as the research object, and using X-CT to characterize the morphology, spatial distribution and other parameters of high-density minerals in the cores. The spatial position of the target heavy mineral in the cores can be quickly and accurately obtained by analyzing the X-CT data. According to the relative spatial position of the target minerals in the cores provided by X-CT, traditional target preparation techniques are guided to prepare target samples in the target area. Microzone characterization is performed using scanning electron microscopy （SEM） and laser ablation inductively coupled plasma mass spectrometry （LA-ICP-MS） to obtain the spatial occurrence states of rare earth minerals and uranium-containing minerals in the rock core, as well as the distribution information of specific elements in the microzonea. Due to the pre-use of X-CT to locating the spatial position of the target minerals and corresponding microzone, the efficiency of target preparation and the accuracy of point selection have been effectively improved.