中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
In Situ U-Th-Pb Dating of Parisite: Implication for the Age of Mineralization of Colombian Emeralds

文献类型:期刊论文

AuthorAltenberger, Uwe6; Rojas-Agramonte, Yamirka4,5; Yang, Yueheng3; Fernandez-Lamus, Jimmy2; Hager, Tobias4; Guenter, Christina6; Gonzalez-Pinzon, Alejandra1; Charris-Leal, Felipe1; Artel, Julia6
SourceMINERALS
Issued Date2022-10-01
Volume12Issue:10Pages:14
Keywordgeochronology U-Th-Pb dating parisite calcite emeralds Muzo Eastern Cordillera Colombia
DOI10.3390/min12101232
English AbstractParisite-Ce (Ca(Ce,La)(2)(CO3)(3)F-2) is a rare-earth (REE) fluorocarbonate mineral first described from the world-famous emerald mines of the Muzo district, Boyaca Province, Colombia. Four samples of parisite-Ce collected from outcrops near Muzo have been geochemically studied and dated using the in situ laser ablation U-Th-Pb method. Our study shows that the REE abundance of parisite is controlled by the leaching of the wall rocks (black schist). Furthermore, we show that the parisite-Ce crystals formed in textural equilibrium with the emeralds, suggesting a similar time of crystallization. Our analysis demonstrates the capability of parisite as a geochronometer and shows that precise and accurate U-Th-Pb ages can be obtained from parisite after common Pb-207 correction. A higher precision date was obtained with the Th-Pb ratio rather than with the U-Pb ratio because of the relatively higher content of Th than U in the samples. The samples yielded Th-208-Pb-232 ages ranging from similar to 47 to 51 Ma. The new ages are similar to 10 Ma older than previously reported Ar-Ar ages and similar to 10 Ma younger than previously reported Rb/Sr ages. These results will have significant implications for understanding the timing of mineralization and crystallization of emerald deposits in Colombia. Furthermore, this study opens new avenues for dating similar deposits worldwide.
WOS KeywordEASTERN CORDILLERA ; EVOLUTION ; DEPOSITS ; SAMPLES ; BASINS
Funding ProjectUniversity of Potsdam grant KoUP-program ; FAPA from Universidad de los Andes ; Natural Science Foundation of China
WOS Research AreaGeochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
Language英语
WOS IDWOS:000875418900001
PublisherMDPI
Funding OrganizationUniversity of Potsdam grant KoUP-program ; University of Potsdam grant KoUP-program ; FAPA from Universidad de los Andes ; FAPA from Universidad de los Andes ; Natural Science Foundation of China ; Natural Science Foundation of China ; University of Potsdam grant KoUP-program ; University of Potsdam grant KoUP-program ; FAPA from Universidad de los Andes ; FAPA from Universidad de los Andes ; Natural Science Foundation of China ; Natural Science Foundation of China ; University of Potsdam grant KoUP-program ; University of Potsdam grant KoUP-program ; FAPA from Universidad de los Andes ; FAPA from Universidad de los Andes ; Natural Science Foundation of China ; Natural Science Foundation of China ; University of Potsdam grant KoUP-program ; University of Potsdam grant KoUP-program ; FAPA from Universidad de los Andes ; FAPA from Universidad de los Andes ; Natural Science Foundation of China ; Natural Science Foundation of China