Deposit types/Chromium

Podiform chromite

Pods of chromite in deformed ultramafic rock of ophiolites.

What it is

Pods of chromite in deformed ultramafic rock of ophiolites.1

How it forms

Chromite gathers as cumulates in magma pockets at spreading plate boundaries and is later exposed in accreted ophiolite terranes.1

Host rocks

Deformed dunite and harzburgite, commonly serpentinised.1

Where it forms

Oceanic spreading boundaries, later accreted.1

How old

Phanerozoic1

Story cards

Sources

  1. Mineral Deposit Models (Bulletin 1693, Cox and Singer, eds., 1986) US Geological Survey

From the Prospector Trails mining history dataset: each fact links to the source it was checked against. Figures are as the source gives them, in the money of their day. Not investment advice.

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Cover photos from Wikimedia Commons: Super Pit, Kalgoorlie by Kgbo, CC BY-SA 4.0.