Genesis of Magmatic Albitite Related Hydrothermal Uranium Mineralisation in Geratiyon-ki-Dhani, Sikar District, Rajasthan: Evidences from Fluid Inclusion Studies

• Published in: Journal of the Geological Society of India 2022-08, Vol.98 (8), p.1074-1084
• Main Authors: Saxena, Anubhooti, Mathew, Shijo, Kumar, Monu, Sharma, S. K., Bisht, B. S., Sinha, D. K.
• Format: Article
• Language: English
• Subjects: Belts; Biotite; Bubbles; Calcite; Cooling; Crystals; Earth and Environmental Science; Earth Sciences; Fluid inclusions; Fluids; Geology; Haematite; Halite; Hematite; High temperature; Histograms; Homogenization; Hydrogeology; Liquid phases; Mineralization; Original Article; Petrography; Petrology; Quartz; Room temperature; Salinity; Salinity effects; Salts; Saturation; Schist; Schists; Sodium chloride; Temperature; Uranium
• ISSN: 0016-7622; 0974-6889
• DOI: 10.1007/s12594-022-2126-7

Geratiyon-ki-Dhani (GKD) area is located in Khetri sub-basin of North Delhi Fold Belt and exposes metasediments of Ajabgarh Group. The Ajabgarh Group comprises quartz-biotite schist which is intruded by albitite and granite. The primary uranium phases viz. davidite and brannerite occurring with calcite and /or quartz veins are common in albitite. Quartz and calcite from mineralised albitite have been selected for characterization of the ore-forming fluid, which makes a promising uranium deposit. Fluid inclusion petrography indicated presence of three (03) types of fluid inclusions (FIs) based on phases present at room temperature and mode of occurrence; polyphase (type 1a & 1b) and biphase (type 2) inclusions. Type 1a FIs are primary in nature and are composed of vapour bubble, salt crystals with 50% liquid phase, occur as trans-granular trails and in clusters, having irregular shapes with size varying from