kamtal skarn is located 15 km northeast of kharvana, east-azarbaijan. a quartz-monzonitic stock of oligocene age intruded the upper cretaceous sedimentary sequence (claystone, limestone, marl, and siltstone) developing noticeable metamorphic (marble, hornfels) and metasomatic (skarn) alteration zones along the contact. kamtal skarn is of calcic type and consists of both endoskarn and exoskarn z...

This study presents the first geochemical, mineralogical and petrological data on mafic ultramafic rocks of Texenna (Lesser Kabylia, north-eastern Algeria) with aim constraining their tectonic setting in context Maghrebide belt. The magmatic-sedimentary complex comprises serpentinite, metabasites (metagabbro, metadolerite metabasalt pillow-lava structures), oceanic metasediments (radiolarite ca...

Introduction: Amphibole has been reported from a few groups of Martian meteorites (basaltic, lherzolitic and dunitic groups) [1-4]. They are always present within a magmatic inclusion trapped in pyroxene and olivine in spite of the large difference of the host petrology. Their mineral compositions are almost identical to one another and are kaersutitic. So far, only observations by optical micr...

introduction the avan cu-fe skarn is located at the southern margin of qaradagh batholith, about 60 km north of tabriz. the skarn-type metasomatic alteration is the result of qaradagh batholith intrusion into the upper cretaceous impure carbonates. the studied area belongs to the central iranian structural zone. in regional scale, the studied area is a part of the zangezour mineralization zone ...

• Geochronology and petrogenesis of the ore-forming intrusions from Lietinggang-Leqingla deposit. Fe-Cu mineralization was controlled by mantle materials weakly fractional crystallization. An ancient crustal component extensive fractionation crystallization contributed to Pb-Zn mineralization. The deposit has magmatism conditions that allow iron-copper lead-zinc form simultaneously. is a repres...

Abstract The Saidikulam nephrite deposit, which is famous for its high-quality white no matter in history and nowadays, located the eastern part of Western Kunlun Orogen, northwestern margin Tibetan Plateau, Yutian County, Xinjiang, China. Field investigations petrographic observations revealed presence five mineral assemblage zones from granodiorite to dolomitic marble deposit: slightly epidot...