1 cadangan
1.1 deposito di benua timur
1.1.1 Asia
India, Russia
1.1.2 Afrika
South Africa
1.1.3 Eropah
Germany, Greece, Italy, Scotland, Turkey
1.1.4 lain
tanah penggembalaan, mid-Atlantik ridge
1.2 deposito di benua Barat
1.2.1 Amerika Utara
Canada, USA
1.2.2 Amerika Selatan
Bolivia, Brazil, Kolumbia, venezuela
1.3 deposito di oceania benua
1.3.1 Australia
New Zealand, Queensland