Abstract Views :226 |
PDF Views:2
Authors
Affiliations
1 Department of Geology, University of Jammu, Jammu - 180 006, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 70, No 2 (2007), Pagination: 265-272
Abstract
The Proterozoic Dhanota granite has intruded the Delhi Supergroup in the North Delhi Fold Belt (NDFB). Geochemically, it is a silica-Rich, weakly paraluminous, sodic granite, enriched in high field strength elements (Zi, Nb, Y, Th) and Ga, with higher Ga/Al, Th/U and lower Ba/Rb ratios. The mineralogical and geochemical characters indicate the Dhanota granite as A-type, emplaced in an extensional/Non-Compressive tectonic regime around 665° C at pressure of 5 kb. The anorogenic nature of the Dhanota granite distinguishes it from the other syn-Orogenic, S-Type granitoid bodies emplaced in the NDFB.
Uranium-Thorium-REE mineralization as uranothorite and xenotime is recorded in the Dhanota granite. This together with its ocurrence in proximity to the U-Mineralized albitite line, and enrichment of HFS elements necessitate exploration for radioactive, rare metal and rare earth minerals in the area.
Keywords
Granite, A-Type, Uranium Mineralization, Dhanota, Haryana.
