Metallogenesis of Miaoya Nb-REE Deposit with Comparison to Typical Carbonatite-Alkaline Rock-Related Nb-REE Deposits in China
REE and Nb are strategic and critical metals mainly sourced from carbonatite-alkaline rocks.Thus,it is of great scientific and economic significance for the research on metallogenic mechanism of Nb-REE deposits associated with carbonatite-alkaline rocks.In this paper,we have detailedly summarized the recent progress in Miaoya Nb-REE deposit from Hubei which is related with carbonatite-syenite complex,with respect to geological characteristics,chronology,genesis and metallogenic model.Meanwhile,the method of"comparative metallogeny"is used for its comparison with other typical Nb-REE deposits of the same type from China.Through systematic analysis,we point out that the difference in enriched component introduced into mantle source,the degree of magma evolution,and the intensity of post-magmatic hydrothermal fluid activity are the key factors controlling the mineralization differences of carbonatite-alkaline rock-related Nb-REE deposits.Due to the relatively low-intensity hydrothermal fluid activity,the REE grade of the Miaoya deposit is correspondingly low,leading to the low economic value of its rare earth resources.The rich niobium resources should be focused on with the development and utilization of the Miaoya deposit,which is expected to lower down the currently high external dependency on niobium for China and improve China's niobium resource pattern.
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维普
