Wherry discussed the origin of this material and on the basis of mineralogical and structural evidence suggested its derivation from aan original sedimentary type. He concluded that the presence of sillimanite indicated a noteworthy alumina content of the original sediment and thought that very likely the material w’as originally an argillaceous sandstone. The present writer” has discussed the ...

Greisenization is typically linked with highly fractionated granites and often associated hydrothermal vein systems. Late to postmagmatic metasomatic processes involve the enrichment of volatile components such as boron halogens well several metallic elements. The purpose this study reveal main effects paragenetic sequences related mineralizations in Highiş granitoids, Romania. In a natural out...

Syn-tectonic quartz veins are widely present in low- to medium-grade metapelitic belts, however, dating these is challenging due the lack of suitable target minerals for most geochronological methods. Andalusite a common K-poor aluminosilicate mineral veins. In this study, we demonstrate feasibility fluid inclusions andalusite using 40Ar/39Ar gentle stepwise crushing technique. Three samples sy...

sorkheh-dizaj apatite-iron oxide deposit is located 32 km southeast of zanjan. the area is situated within the tarom subzone of western alborz-azarbaijan structural zone. the oldest units at the sorkheh-dizaj area are eocene trachyte, trachyandesite, olivine basalt and volcanoclastic brecciate tuff and lapilli tuff which intruded by a quartz-monzonite, monzonite and granite subvolcanic pluton o...

introduction the ahangaran pb-ag deposit is located in the hamedan province, west iran, 25 km southeast of the city of malayer . . the deposit lies in the strongly folded sanandaj-sirjan tectonic zone, in which the ore bodies occur as thin lenses and layers. the host rocks of the deposit are early cretaceous carbonates and sandstones that are unconformably underlain by jurassic rocks. ore miner...

introduction there is an iron mining complex called shahrak 60 km east of takab town, nw iran. the exploration in the shahrak deposit (general name for all iron deposits of the area) started in 1992 by foolad saba noor co. and continued in several periods until 2008. the shahrak deposit comprising 10 ore deposits including korkora-1, korkora-2, shahrak-1, shahrak-2, shahrak-3, cheshmeh, golezar...