Final answer:
Peralkaline Ta-Nb, REE deposits contain high concentrations of tantalum, niobium, and rare earth elements. They are often found in alkaline igneous rocks and associated with other transition metals and minerals.
Step-by-step explanation:
A peralkaline Ta-Nb, REE deposit is a type of mineral deposit that contains high concentrations of tantalum (Ta), niobium (Nb), and rare earth elements (REE). These commodities are important for various industries, including electronics, automotive, and renewable energy.
Peralkaline deposits are typically found in alkaline igneous rocks, such as carbonatites and syenites, which are formed under high temperature and pressure conditions. The associated elements in these deposits can include other transition metals like copper (Cu), lead (Pb), molybdenum (Mo), as well as phosphates and uranium.
For example, the rocks in the Canadian Shield, including parts of Alaska, contain metallic ores such as copper, gold, nickel, and silver. Additionally, rare earth elements like cerium, terbium, dysprosium, and neodymium are found in these deposits.