A texture peculiar to ultra-high pressure podiform chromitites?

Abstract

A texture possibly peculiar to ultra-high pressure podiform chromitites has been found from the Luobusa ophiolite, Tibet as well as from Ray-Iz, the Polar Urals. They show a kind of brecciated texture; fresh olivine filling fractures of chromian spinel grains. Such a texture has not been recognized from ordinary low-pressure chromitites, possibly indicating the history of the ultra-high pressure chromitites, namely, their solid-state uprise from deeper parts of the mantle. It is possibly in accordance with the deep recycling origin for the ultra-high pressure chromitites (Arai, 2010).