A Review of the Genetic Mechanism of Megacrystalline Uraninite in the Kangdian Region, China

Author:

Yin Minghui12,Xu Zhengqi234,Zhang Chengjiang234,Chen Youliang234,Song Hao234,Yao Jian234

Affiliation:

1. Land and Resources Research Center, Mianyang Normal University, Mianyang 621000, China

2. Sichuan Key Laboratory of Geoscience and Nuclear Technology, Chengdu University of Technology, Chengdu 610059, China

3. Earth Exploration and Information Technology Key Laboratory of Ministry of Education, Chengdu University of Technology, Chengdu 610059, China

4. College of Earth and Planetary Sciences, Chengdu University of Technology, Chengdu 610059, China

Abstract

Naturally occurring granular uranium particles are typically fine and are often found as accessory minerals. However, reports of megacrystalline uraninite are rare. The discovery of megacrystalline uraninite is a significant achievement in uranium prospecting and mineralogy in the Kangdian region and China. Our team’s research and review of previous studies have led to a systematic summary of the formation age, genetic types, relationship with migmatization, and metallogenic dynamic background of megacrystalline uraninite in the Kangdian region. The key findings are as follows: (1) the formation age of megacrystalline uraninite is Neoproterozoic (790–770 Ma); (2) migmatization preceded uranium mineralization; (3) the formation of megacrystalline uraninite is linked to high-temperature, low-pressure metamorphism caused by partial melting; (4) and the formation of megacrystalline uraninite may be associated with the Rodinia rifting event. This review aims to enhance our understanding of uranium mineralization during the Neoproterozoic in China and worldwide.

Publisher

MDPI AG

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