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Fluid Inclusion Study of Vinjamuru Precambrian Stratiform Baryte Deposit, Nellore Schist Belt, A.P., India
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The fluid inclusions in Vinjamuru baryte can be broadly classified into primary and pseudo-secondary types. Primary inclusions are represented by monophase carbonic and mixed carbonic-aqueous types. CO2 densities lie in the range of 0.78-0.88 g/cm3. The pseudo-secondary inclusions are represented by aqueous bi-phase type, coexisting with vapor-rich inclusions. Their Th overlaps in the range of 220-230°C suggestive of entrapment from boiling fluids. The primary carbonic inclusions appear to be volcanic entrapments and the fluids in pseudo-secondary inclusions were entrapped from hydrothermal solutions.
Keywords
Fluid Inclusions, Baryte, Vinjamuru, Nellore Schist Belt.
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