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phosphorite
(redirected from phosphorites)

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phosphorite

 or phosphate rock

Rock with a high concentration of phosphates in nodular or compact masses. The phosphates may be derived from a variety of sources, including marine invertebrates that secrete shells of calcium phosphate and the bones and excrement of vertebrates. Typical phosphorite beds contain about 30% phosphorus pentoxide (P2O5) and constitute the primary source of raw materials for phosphate fertilizers. Significant deposits in the U.S. include the Phosphoria Formation in Idaho and the Monterey Formation in California. Major deposits also occur in the Sechura Desert in Peru.



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2 per cent for cobalt and 67 per cent for phosphorites.
Crisis in Africa by UN Chronicle
The Jacobs' report confirmed that the deposits are composed of flat-lying, stratabound, sedimentary phosphorites.
Spur Ventures Inc. - Jacobs Engineering Provide Positive Report On ... by Business Wire
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