Genetic Link between Podiform Chromitites in the Mantle and Stratiform Chromitites in the Crust: A Hypothesis

No genetic link between the two main types of chromitite, stratiform and podiform chromitites, has ever been discussed. These chromitite have very different geological contexts; one is a member layered intrusions, representing fossil magma chambers, in crust, forms pod-like bodies, conduits, upper mantle. Chromite grains contain peculiar polymineralic inclusions derived from Na-bearing hydrous melts, whose features are so similar that they may form fashion. The origin chromite-hosted chromitites controversial but left unclear. also characterize products peridotite–melt reaction or melt-assisted partial melting, such as dunites, troctolites even mantle harzburgites. I propose common for inclusion-bearing chromites, i.e., peridotite magma. Some chromite originally formed through peridotite–magma reaction, possibly loose-packed young were subsequently disintegrated transported to crustal chamber suspended grains. It noted, however, beneath intrusions most now exposed ophiolites.