Yeylagh-e-Gharechi porphyry copper deposit is located in the Arasbaran metallogenic belt at northwestern Iran, 25 kilometer of Ahar. Porphyry mineralization at the Yeylagh-e-Gharechi deposit occurred in post-Oligocene quartz monzonite and monzonite bodies which was hosted by Eocene volcanic rocks. Mineralization occurred as veins, veinlets and dissemination in hypogene zone. Supergene zone has ...

the data obtained from field and geothermometric studies and also the ree composition of fluorites associated with lead mineralization at the kamar-mehdi mine are compatible with a structurally controlled, fissure filling, epigenetic, hydrothermal origin. homogenization and last ice melting temperatures for primary fluid inclusions trapped in fluorite crystals indicate that the mineralization o...

The quasi-static theory of poroelasticity presented by Biot and Gassmann provides a relationship between the drained and undrained elastic constants of an isotropic fluid-saturated porous material in terms of the porosity of the material, bulk modulus of the solid grains, and bulk modulus of the pore fluid. We have developed an alternative approach to derive the Biot-Gassmann (BG) relationship ...

orpiment, getchellite and stibnite from zarshuran deposit, nw iran, exhibit extensive as-sb substitution. there are four known minerals along as2s3-sb2s3 join, i.e. orpiment (as2s3), wakabayashilite [(as,sb)20s30], getchellite (assbs3) and stibnite (sb2s3). extensive mineralogical studies by scanning electron microscope (sem) and electron probe micro-analyzer (epma) indicate that getchellite fr...

detailed petrographic, geochemical and strontium isotope studies, combined with field observation and rnicrofacies investigations indicate that syngenetic celestite at the base of asmari formation at the bangestan anticline, behbahan region, was deposited directly from tertiary seawater in an intrasupratidal to supratidal environment. during diagenesis, the precipitated celestite underwent seve...