Search results
Results from the WOW.Com Content Network
Chromite resources from podiform deposits are mainly found in Kazakhstan, Turkey, and Albania. Zimbabwe is the only country that contains notable chromite reserves in both stratiform and podiform deposits.
In particular, the rock podiform chromitite bears chromite, which is one of the ore minerals of chromium. [53] Particularly, the deposits in Poum Massif are believed to be crystallized in a supra-subduction setting from boninitic to tholeiitic magmas, then transported by an asthenospheric (lherzolite) intrusion along a transform fault (hence ...
Podiform Chromitites are found in ultramafic oceanic rocks resulting from complex magma mixing. [21] They are hosted in serpentine and dunite rich layers and are another source of chromite. [19] Kimberlites are a primary source for diamonds.
Chromite and magnetite are ore minerals that form in this way. [1] Liquid immiscibility: sulfide ores containing copper, nickel, or platinum may form from this process. As a magma changes, parts of it may separate from the main body of magma. Two liquids that will not mix are called immiscible; oil and water are an example.
For example, the Maggie Hays and Emily Ann ore deposits, in the Lake Johnston Greenstone Belt, Western Australia, are highly structurally remobilised (up to 600 m into felsic footwall rocks) but are hosted in folded podiform adcumulate to mesocumulate bodies which lack typical spinifex flow-top facies and exhibit an orthocumulate margin.
It is usually found as the mineral chromite, from which ferrochrome is produced in a smelting process. Rank Country/Region Chromium ore production (tonnes)
The most significant source of uvarovite historically has been a now-closed copper mine at Outokumpu, Finland, from where most museum specimens have been collected. [7] The uvarovite crystals found in the Outokumpu district are among a wide range of chromium-rich silicate phases found in association with volcanogenic copper-cobalt-zinc sulfide ore deposits which are known to have an unusually ...
Ophiolites are sequences of mafic to ultramafic rock generally believed to represent ancient oceanic lithosphere.They are distributed all across the world being all of them located at present or past orogenic belts, sites of mountain building processes.