نتایج جستجو برای: skarn
تعداد نتایج: 376 فیلتر نتایج به سال:
Abstract Southwestern Sardinia, Italy, hosts several skarn, W–Sn–Mo greisen and hydrothermal deposits related to a 289±1 Ma Late Variscan granite suite. Among them, the most representative scheelite-bearing skarns belong San Pietro Sinibidraxiu localities, in Monte Tamara area, Sulcis region. The deposit is typical calc-silicate skarn whereas sharply bounded orebody hosted marble unit. Optical ...
This work aims at figuring out the spatial relationships between the geophysical and geological models in a case study pertaining to copper-sulfide mineralization through an integrated 3D analysis of favorable target. The Ghalandar Skarn-Porphyry Cu Deposit, which is located in NW Iran, is selected for this research work. Three geophysical surveys of direct current electrical resistivity and in...
Mineralogical and geochemical investigations indicate two general stages of skarnification i.e, prograde and retrograde stages in the Mohammad-Abad district, south west of Yazd province. Metasomatic skarn (Prograde stage) occurred with precipitation of anhydrous calc-silicate mineral assemblages (andradite and diopside- hedenbergite) within the temperature ranges of 470 to 550 ºC. During the re...
Los Guindos scheelite (±Zn, Bi, Sn, Ag) skarn presents mineral assemblages and a chemistry similar to other worldwide strongly reduced W deposits. Its nature is defined based on the predominance of subcalcic garnets, Mo-free absence magnetite. Both prograde retrograde stages are evident at skarn. The characterized by three zones: A zone I garnet + helvine (Gr57Sps24Ad19Alm8 - Sps50Alm24Gr22Ad3;...
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...
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