1 cadangan
1.1 deposito di benua timur
1.1.1 Asia
India, Russia
Afghanistan, Indonesia, Japan, Russia
1.1.2 Afrika
1.1.3 Eropah
Germany, Greece, Italy, Scotland, Turkey
Greece, Hungary, Iceland, Italy, Turkey
1.1.4 lain
tanah penggembalaan, mid-Atlantik ridge
belum menemukan
1.2 deposito di benua Barat
1.2.1 Amerika Utara
Canada, USA
Canada, Mexico, USA
1.2.2 Amerika Selatan
Bolivia, Brazil, Kolumbia, venezuela
Argentina, Chili, Ekuador, peru
1.3 deposito di oceania benua
1.3.1 Australia
New Zealand, Queensland
New Zealand