hired is a large gold prospecting area which is located in south khorasan province, in the east of iran. gold mineralization is found in 4 target areas covering about 24 km2. the host rocks are mainly tertiary volcanics, some jurassic and cretaceous sediments. sub-volcanic rocks are of magnetite series (gabbros to diorite) and ilmenite series (granite-granodiorite-monzonite) which have intruded...

A Cretaceous paleo-accretionary wedge, the Ashin Complex, now exposed along Zagros suture zone in southern Iran, exhibits mafic, metasedimentary and ultramafic lithologies. Field, geochemical petrological observations point to an anomalous high-temperature event that gave rise formation of peritectic (trondhjemitic) melts associated with restitic garnet-bearing amphibolites. Lu-Hf isotopic dati...

Abstract The foliated low-grade metamorphic rocks of the Triassic Bagolyhegy Metarhyolite Formation, mainly pyroclastic origin, host post-metamorphic quartz-albite veins containing abundant tourmaline and occasionally rutile/ilmenite. study Ti-oxide-mineralized with SEM-EDX revealed an unusual mineral assemblage comprising fine-grained Nb–Ta-bearing oxides (columbite-tantalite series, fluorcalc...

• Supergene copper mineralization (SCM) from Atacama Desert and SW of Burkina Faso. Paragenesis chemical characterization SCM different geodynamic context. The same mineralogy geochemical patterns are observed in both areas. REE study suggests oxidizing conditions to form supergene mineralization. Geological climatic controls involve the genesis these similar. Using optical microscopy, SEM, EPM...

Abstract The Anarraaq clastic-dominated (CD) Zn-Pb-Ag deposit (Red Dog district, Alaska, USA) has an inferred mineral resource of 19.4 Mt at 14.4% Zn, 4.2% Pb, and 73 g/t Ag is spatially associated with a separate ~1 Gt barite body. This study presents new cross sections petrographic evidence from the area. body, previously shown to have formed in shallow subsurface environment akin methane col...

The petrological features of scoria samples and enclosed holocrystalline xenoliths from the last ~1000 years activity La Soufrière volcano St. Vincent (Lesser Antilles) are described in detail here. products investigated prehistoric eruptions (pre-1440, 1440, 1580 CE) relatively homogeneous basaltic andesites (with a paragenesis consisting plagioclase, clinopyroxene, orthopyroxene opaques) comm...

Alongside volcanic eruptions in the middle and late Permian, sedimentary environment process changed, lithofacies mineralogical characteristics varied conspicuously from marine sediments this period. Marine tuffaceous rocks beared strong witness to actions time. With experimental studies relying on field outcrop, thin section, scanning electron microscope, X-ray diffraction (XRD), mercury injec...