Origin of Drusy Dolomite Cement in Permo-Triassic Dolostones, Northern United Arab Emirates

While the characteristics and origin of drusy calcite cement in carbonate deposits is well constrained literature, little attention paid to dolomite cement. Petrographic observations, stable isotopes, fluid-inclusion microthermometry suggest that Permo-Triassic conglomerate/breccia dolostone beds northern United Arab Emirates has precipitated as not by dolomitization The low ?18OVPDB (?9.4‰ ?6.2‰) high homogenization temperatures fluid inclusions (Th = 73–233 °C) was caused hot basinal brines (salinity 23.4 wt% NaCl eq.). ?13CVPDB values (+0.18‰ +1.6‰) 87Sr/86Sr ratio (0.708106 0.708147) indicate carbon strontium were derived from host marine carbonates. Following this event, blocky 148 °C; salinity 20.8 eq.) brines. Unravelling important implications for accurate construction paragenetic sequences rocks decipher chemistry diagenetic waters sedimentary basins.