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Authors
Affiliations
1 Department of Geology, University of Rajasthan, Jaipur, IN
2 Department of Geology, University of Jammu, Jammu, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 56, No 6 (2000), Pagination: 661-671
Abstract
The Degana tungsten deposit is found genetically and spatially related to the post-Delhi granite. Hydrothermal fluids associated with this granitic magmatism have evolved in three stages. Early greisenization stage took place in the temperature range 480°-260°C. Brecciation followed by boiling and emplacement of quartz sheets responsible for most of the wolframite mineralization occurred in the temperature range of 270°-350°C. In the last stage, addition of meteoric water took place in the temperature range of 130°-260°C. Salinity of mineralizing hydrothermal fluids ranges fiom 67-9 eq. wt % NaCI. Evidence of fluid boiling suggests a depth of mineralization at 600-1250 m, consistent with a range of hydrostatic pressure for about 60-300 bars.
Keywords
Hydrothermal Fluids, Fluid Inclusions, Granitic Magmatism, Tungsten Mineralization, Degana, Rajasthan.
