Ilmenite-group titanates are relatively common accessory minerals in agpaitic nepheline syenite (lujavrite) in the Pilansberg alkaline complex, South Africa. They crystallized in three generations and form a continuous ecandrewsite – pyrophanite solidsolution extending from (Zn0.81Mn0.12Fe0.07)TiO3 to (Mn0.93Fe0.7)TiO3. The earliest generation of ferroan manganoan ecandrewsite of widely varying...

   The Asinawa iron ore is located about 3km to the southeast of Penjween town, Sulaimaniya Governorate, Kurdistan Region, Northeastern Iraq near the Iraq-Iran border. The exposed iron ore deposit is about 60 and 400m wide and long respectively. The present study is the re-study of the geology and geochemistry of the Asnawan Iron ore deposit  and concluded that the country rocks are consist of ...

The Querari Complex corresponds to the basement rocks from Uaupes Domain and represents one of least studied units in northwest Rio Negro Province, Amazonian Craton. In this paper, we present new field geology, petrographic, geochemical data deformed granites Complex. Based on our results, suggest differentiation into two magmatic facies. Pana-Pana Facies comprise mainly porphyritic syeno monzo...

Abstract Paragenetic associations of tetrahedrite-(Zn) and sphalerite are distinguished in the Teremki gold-ore deposit. The chemical composition coexisting minerals this association is determined. Sb/(Sb + As) Fe/(Fe Zn) ratios vary from 0.66 to 0.97 0.28 0.40, respectively. A negative correlation was established between ratios. Contents Fe change 0.88 1.43 wt % (1.5–2.5 mol FeS). Temperature ...

Abstract The paragenesis and composition of bavenite–bohseite were investigated in fifteen granitic pegmatites from the Bohemian Massif, Czech Republic. Three types distinct their relation to primary Be precursors, mineral assemblages, morphology origin recognised: (1) hydrothermal crystallised miarolitic pockets residual pegmatite fluids; secondary two types: (2) a proximal type restricted spa...

kuh- e -zar gold deposit located 35 km west of torbat-e-heydaryeh, (khorassan e- razavi province), east of iran. this deposit is a specularite-rich iron oxide type (iocg). this mine is situated within khaf-bardascan volcanic plutonic belt. based on recent exploration along this belt, several iocg type system plus kuh-e-zar deposit are discovered. in the study area, several type of tuff and lava...

This study encompasses the ore mineralogy, textures and sulphide trace element chemistry of Palaeoproterozoic Lovisa stratiform Zn-Pb deposit stratigraphically underlying Fe Formation in Bergslagen province (Sweden). We investigate relative timing formation subsequent modifications its ores relation to c. 1.87–1.80 Ga Svecokarelian orogeny. The consists several different types. massive sphaleri...