WebBoth laterally and vertically, chromite occurs as persistent layers, lenses or pockets in the serpentinized and silicified dunite-peridotite extending over a strike length of 25 km. The ultramafic rocks and the chromitite layers are cofolded with the Iron-Ore Supergroup into a plunging syncline. WebThe chromitites are concordant cumulates and are associated with distinct chromitite-bearing sequences within the mantle peridotites. Refractory and metallurgical chromite deposits are spatially separated and related to different lithologic associations, which crystallized from different parental magmas.
A mechanism for chromite growth in ophiolite complexes: …
WebRead Volume 72 Issue 7 of Economic Geology. Ultramafic-Hosted Ni-Cu-Co-(As) Mineralization from an Ancient Oceanic Transform Fault Zone in the Troodos Ophiolite, Cyprus: An Analogue for Ultramafic Sea Floor Massive Sulfide Mineralization? WebDec 31, 2024 · The upper ultramafic unit contains, more frequently, pegmatoidal sections, and the Chromitiferous Harzburgite unit has less massive chromitite layers than the southeastern parts of the complex, whereas the gabbro(-norite) units contain more interstitial liquid with late-stage minerals. The findings confirm that the anvil-shaped intrusion in ... sonnets examples of dogs
Chromite chemistry and platinum-group element
WebThe complex is composed of several persistent lithological units from the base upwards: Basal Gabbro 3–6 m thick; Lower Harzburgite 30–40 m thick; Chromitiferous Harzburgite 30–60 m thick; Main Harzburgite up to 400 m thick; Upper Pyroxenite 60–70 m thick; Gabbronorite and Upper Gabbro units up to 300 m thick with chilled and quenched zones … WebJan 2, 2024 · The anorthosites are also characterized by a slightly smaller average plagioclase grain size than plagioclase in the norite (1·41 mm and 1·54 mm, … WebShinkle, David; University of Minnesota Duluth. Department of Geological Sciences. (2014). "The Black Thor Igneous Complex: A Chromitiferous Ultramafic-mafic Layered Intrusion … sonnet house insurance reviews