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Brine-Rich Hydrothermal Fluid Circulation in the Upper Level of Nidar Ophiolite Sequence, Ladakh:Evidences from Fluid Inclusions
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The highly saline fluid was probably derived by phase separation of hydrothermal seawater or an exsolved magmatic aqueous phase at the temperature of 250-412°C. The migration of the Phase-Separated along fractures resulted in segregation of the vapour and brines and preferential entrapment of High-Saline inclusions at depth. These brines may have originated when seawater approached the top of the magma chamber. The subsequent fracturing of the gabbro at the temperature of 130-390°C facilitated the entry of seawater which pervasively altered the gabbro. This hydration processes resulted into the formation of secondary minerals or by mixing with Phase-Separated fluid, resulting in salinities Two-Times higher than that of seawater.
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