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Characteristics of uranium minerals in wall-rock alteration zones of the Mianhuakeng (No. 302) uranium deposit, northern Guangdong, South China
Zhang Long1,2,3; Chen ZhenYu3; Li ShengRong4; Huang GuoLong5
2018
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume34Issue:9Pages:2657-2670
AbstractThe Mianhuakeng uranium deposit (No. 302) is the largest granite-hosted uranium deposit in South China. Here, we conduct detailed studies upon wall-rock alteration zones and chemical dating of uranium minerals of a representative drill hole from this deposit by electron probe microanalyzer (EPMA). This deposit shows obvious vertical wall-rock alteration zones, which can be mainly divided into four zones, namely, the fresh granite or weak alteration zone, the kaolinization and sericitization zone, the strong sericitization and the chloritization zone, and the mineralization zone. Uranium minerals also show vertical alteration zoning, where the main uranium minerals of the I , II ,III and zones are uraninite and uranothorite, whereas the dominant uranium minerals of the IV zone are pitchblende, coffinite, uranothorite, and brannerite. EPMA dating upon the uranium minerals of different alteration zones shows that the chemical ages of the uraninites only has one group age of 165 +/- 3.1Ma, which represents the formation age of the Changjiang granite; while the chemical ages of the pitchblendes have four groups of ages, i. e. , similar to 120Ma, similar to 102Ma, similar to 92Ma, and similar to 68 Ma, respectively, which represent multiple episodes of hydrothermal events that are responsible for the precipitation of U ores in the deposit. The first three groups of ages may represent the early stages of uranium mineralization, and the last one is the main metallogenic epoch of the No. 302 deposit. Extensive hydrothermal alteration could mobilize U from the magmatic U-bearing accessory minerals such as uraninite. Detailed research on the alteration zones of the typical uranium deposit is helpful to improve the prospecting effect of concealed deposits.
KeywordUranium minerals Wall-rock alteration zones EPMA Granite-type uranium deposits Northern Guangdong
WOS KeywordNATURAL FISSION REACTORS ; PB ISOTOPIC SYSTEMATICS ; ZHUGUANGSHAN COMPLEX ; JIANGXI PROVINCE ; URANINITE ; GRANITE ; GEOCHEMISTRY ; AGE ; PETROGENESIS ; GEOCHRONOLOGY
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000456917900010
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90495
Collection矿产资源研究院重点实验室
Corresponding AuthorChen ZhenYu
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Geol Sci, Inst Mineral Resources, NMR Key Lab Metallogeny & Mineral Resource Assess, Beijing 100037, Peoples R China
4.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
5.China Natl Nucl Corp, Res Inst 290, Shaoguan 512026, Peoples R China
Recommended Citation
GB/T 7714
Zhang Long,Chen ZhenYu,Li ShengRong,et al. Characteristics of uranium minerals in wall-rock alteration zones of the Mianhuakeng (No. 302) uranium deposit, northern Guangdong, South China[J]. ACTA PETROLOGICA SINICA,2018,34(9):2657-2670.
APA Zhang Long,Chen ZhenYu,Li ShengRong,&Huang GuoLong.(2018).Characteristics of uranium minerals in wall-rock alteration zones of the Mianhuakeng (No. 302) uranium deposit, northern Guangdong, South China.ACTA PETROLOGICA SINICA,34(9),2657-2670.
MLA Zhang Long,et al."Characteristics of uranium minerals in wall-rock alteration zones of the Mianhuakeng (No. 302) uranium deposit, northern Guangdong, South China".ACTA PETROLOGICA SINICA 34.9(2018):2657-2670.
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