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U-Pb, Pb-Pb and Sm-Nd Ages of Davidite within Albitite Zone from Bichun, Jaipur District, Rajasthan, India:Possible Link between Uranium Mineralization and Grenvillian Orogeny


Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Jamshedpur 831 002, India
2 Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, India
3 Atomic Minerals Directorate for Exploration and Research, Jaipur 302 030, India
4 Department of Applied Geology, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, India
 

Uranium mineralization in Bichun area, Jaipur district, Rajasthan, India is hosted by albitites within the Banded Gneissic Complex (BGC). Detailed mineralogical and EPMA studies reveal the presence of davidite along with brannerite and uraninite. The U-Pb concordia upper intercept age of 933 ± 13 Ma and Pb-Pb isochron age of 930 ± 4 Ma, on pure davidite fractions indicate the timing of uranium mineralizing event to be ca. 930 Ma. The timing of uranium mineralization can be correlated with the Grenvillian orogeny (ca. 1000 Ma). The Sm-Nd model age (TDM) of daviditeis varies from 1851 to 2200 Ma with εNdi(930 Ma) ranging from -10.7 to -15.5 which shows that the Palaeoproterozoic rocks with crustal component (either within BGC or basement granite) are the source for uranium.

Keywords

Albitite Zone, Davidite, Geochronology, Orogeny, Uranium Mineralization.
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  • U-Pb, Pb-Pb and Sm-Nd Ages of Davidite within Albitite Zone from Bichun, Jaipur District, Rajasthan, India:Possible Link between Uranium Mineralization and Grenvillian Orogeny

Abstract Views: 358  |  PDF Views: 126

Authors

G. S. Yadav
Atomic Minerals Directorate for Exploration and Research, Jamshedpur 831 002, India
U. K. Pandey
Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, India
S. L. Aravind
Atomic Minerals Directorate for Exploration and Research, Jaipur 302 030, India
P. K. Panchal
Atomic Minerals Directorate for Exploration and Research, Jaipur 302 030, India
A. S. Venkatesh
Department of Applied Geology, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, India
P. R. Sahoo
Department of Applied Geology, Indian Institute of Technology (Indian School of Mines), Dhanbad 826 004, India
A. K. Chaturvedi
Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, India
A. K. Rai
Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, India
P. S. Parihar
Atomic Minerals Directorate for Exploration and Research, Hyderabad 500 016, India

Abstract


Uranium mineralization in Bichun area, Jaipur district, Rajasthan, India is hosted by albitites within the Banded Gneissic Complex (BGC). Detailed mineralogical and EPMA studies reveal the presence of davidite along with brannerite and uraninite. The U-Pb concordia upper intercept age of 933 ± 13 Ma and Pb-Pb isochron age of 930 ± 4 Ma, on pure davidite fractions indicate the timing of uranium mineralizing event to be ca. 930 Ma. The timing of uranium mineralization can be correlated with the Grenvillian orogeny (ca. 1000 Ma). The Sm-Nd model age (TDM) of daviditeis varies from 1851 to 2200 Ma with εNdi(930 Ma) ranging from -10.7 to -15.5 which shows that the Palaeoproterozoic rocks with crustal component (either within BGC or basement granite) are the source for uranium.

Keywords


Albitite Zone, Davidite, Geochronology, Orogeny, Uranium Mineralization.



DOI: https://doi.org/10.18520/cs%2Fv111%2Fi5%2F907-913