Columbite thiab tantalite pom ua ke hauv granite, pegmatites, thiab placer deposits. Lawv tshwm sim ntau nyob rau hauv western Australia. Los ntawm thaum ntxov xyoo pua 21st Mozambique tau dhau los ua lub ntiaj teb cov khoom loj tshaj plaws ntawm tantalum thiab Brazil tus tsim khoom loj tshaj plaws ntawm niobium.
Columbite pom nyob qhov twg hauv Nigeria?
Columbite feem ntau pom nyob rau hauv sab qaum teb ntawm Nigeria thiab cov xeev nrog cov nyiaj tso cia suav nrog; Plateau, Kogi, Kano, Nasarawa, Kaduna, thiab Bauchi xeev.
columbite siv rau dab tsi?
Columbite-tantalite pawg yog cov ntxhia siv dav hauv kev siv tshuab. Electronics, automotive systems thiab cov khoom noj qab haus huv zoo li cov pacemaker xav tau cov ntxhia no los ua haujlwm. Nws yog mined hauv Africa thiab tau txais lub npe ntawm Coltan ob peb xyoos dhau los.
Ib columbite ib ore?
Columbite, tseem hu ua niobite, niobite-tantalite thiab columbate [(Fe, Mn)Nb2O6], yog ib qho Cov pob zeb dub dub uas yog ib ore ntawm niobium. Nws muaj ib tug submetallic luster thiab ib tug siab ceev thiab yog ib tug niobate ntawm hlau thiab manganese.
cassiterite nyob qhov twg?
Ntau qhov chaw ntawm cassiterite niaj hnub no pom nyob rau hauv alluvial lossis placer deposits uas muajcov nplej uas tiv taus huab cua. Qhov zoo tshaj plaws ntawm cov thawj cassiterite muaj nyob rau hauv cov mines ntawm Bolivia, qhov twg nws muaj nyob rau hauv hydrothermal leeg. Rwanda muaj kev lag luam mining cassiterite.
