Journal Article

Evidence of fluid process for Li-Rb-F-W rich vein rocks of Degana, Rajasthan, India/Evidencia de un proceso fluido en rocas veteadas ricas en Li-Rb-F-W de Degana, Rajastan, India

Vijay Anand, S, Nisha Devi, R

2025

Overview

Several mineralized vein rocks were intruded into the granites of Rajasthan, India. In some of the vein rocks in Rajasthan has associated with enormous amount of critical metals and rare metals. The metals are spatially associated with the vein rocks of Degana, Rajasthan, India. Six samples were collected in wall and core of the vein rocks. Two samples from wall and one sample from core of each vein respectively. The samples were selected for fluid inclusion and laser Raman microprobe studies. Four distinct types of fluid inclusion were identified and classified. Type I is aqueous bi-phase ([L.sub.H2O]+[V.sub.H2O]) inclusion; Type II is aqueous-carbonic ([L.sub.H2O]+LCO2) inclusion; Type III is carbonic mono liquid (LCO2) inclusion under room temperature; Type IV is polyphase inclusion ([L.sub.H2O]+[V.sub.H2O]+S). The varying homogenization temperatures with different salinities implies mixed fluid process. The fluid process was mainly derived from the host rock granite. Later the cooled magmatic fluids were mixed with the meteoric water during hydrothermal stage may be the major key factor for formation of Li-Rb-F-W mineralization in Rajasthan, India. Keywords: Neoproterozoic; vein rock; fluid salinity; fluid boiling; carbonic inclusion; Laser Raman microprobe. Varias vetas de roca mineralizadas fueron intruidas en los granitos de Rajastan, India. Algunas de estas vetas de Rajastan presentan una enorme cantidad de metales criticos y raros. Estos metales estan asociados espacialmente con las vetas de Degana, Rajastan, India. Para este trabajo se recolectaron seis muestras de la pared y del nucleo de dos vetas. Dos muestras de la pared y una del nucleo de cada veta, respectivamente. Las muestras se seleccionaron para estudios de inclusion fluida y microsonda laser Raman. Se identificaron y clasificaron cuatro tipos distintos de inclusion fluida: el tipo I es una inclusion acuosa bifasica ([L.sub.H2O]+[V.sub.H2O]); el tipo II es una inclusion acuoso-carbonica ([L.sub.H2O] + [L.sub.CO2]); el tipo III es una inclusion carbonica monoliquida @@ a temperatura ambiente; y el tipo IV es una inclusion polifasica ([L.sub.H2O] + [V.sub.H2O] + S). La variacion en las temperaturas de homogeneizacion con diferentes salinidades implica un proceso de fluido mixto. Este proceso fluido se derivo principalmente del granito de la roca huesped. Mas tarde, los fluidos magmaticos enfriados se mezclaron con el agua meteorica durante la etapa hidrotermal, lo que puede ser el principal factor clave para la formacion de la mineralizacion de Li-Rb-F-W en Rajastan, India. Palabras clave: neoproterozoico; veta de roca; salinidad del fluido; lava; inclusion carbonica; microsonda laser Raman

• Publisher: Universidad Nacional de Colombia, Departamento de Geociencias
• Subject: Salinity