Oxygen fugacity (ƒO 2) controls the speciation of COH fluids in Earth's mantle; a major
question is whether the sublithospheric mantle is metal-saturated, maintaining ƒO 2 near the …

The discovery of diamonds in metamorphic rocks of continental affinities occurred shortly
after the discovery of coesite in similar rocks. These important discoveries led to a revolution …

Several recent papers have purported to find ultra-reduced minerals—as natural examples—
within ophiolitic mantle sections, including SiC moissanite, Fe-Si alloys, various metal …

Recently a number of reports claimed enigmatic appearance of high-pressure and super-
reduced minerals in ophiolitic chromitite and peridotite. Diamond, moissanite, various metal …

This review systematically presents all finds of geogenic, impact-induced, and
extraterrestrial iron silicide minerals known at the end of 2021. The respective morphological …

The origin of the assemblage of ultra-high pressure (UHP), super-reduced (SuR) and
several crustally derived phases in ophiolitic chromitites is still hotly debated. In this paper …

Geophysical investigations and laboratory experiments provide strong evidence for
subduction of ancient oceanic crust, and geological and mineralogical observations suggest …

The Aladağ peridotites mainly consist of harzburgites with subordinary dunites. High olivine
Fo [100× Mg/(Mg+ Fe 2+)= 90.8–92.0] and spinel Cr#[100× Cr/(Cr+ Al)= 61.5–71.6] values …

The enigmatic appearance of cuboctahedral diamonds in ophiolitic and arc volcanic rocks
with morphology and infrared characteristics similar to synthetic diamonds that were grown …

Abstract The Pozanti–Karsanti ophiolite (PKO) is one of the largest oceanic remnants in the
Tauride belt, Turkey. Micro-diamonds were recovered from the podiform chromitites, and …