 | | Journal (article/letter/editorial) | | metasomatism that was responsible for producing chromitite – dunite bodies in the unusual phlogopite peridotite...compositional zoning of chromite grains in the podiform chromitite. Metasomatic melt, with or without vapor, reacted...enriched it in Fe and formed minor amounts of magnetite. The PGE, which are present mainly as laurite...invariably surround them holds that the dunite and chromitite formed by reaction of mantle peridotite with...mineralization. The Finero complex, where the dunite and chromitite appear to have formed by reaction of peridotite |  | | Journal (article/letter/editorial) | | Avdella mélange. The most sizeable block is a chromitite-bearing serpentinite showing a mesh texture....different chromitite pods are recognized in the studied serpentinite fragment, a Cr-rich chromitite and a...a high-Al chromitite, which have been ascribed to crystallization from a single, progressively differentiating...ore-making Cr-spinel is uneven among the Al-rich chromitite specimens. Textural features such as olivine...suggestive of restricted ferrian chromite (and minor magnetite) substitution for Cr-spinel during a short-lived |  | | Journal (article/letter/editorial) | | contain locally up to 14.6 vol% of magnetite and ilmenite. Magnetite has variable TiO2, Al2O3 and V2O3...hydrous inclusions and nodular textures indicates chromitite formation and alteration under low pressure conditions...classified as ferrogabbros. High V and Ti contents in magnetite indicate a magmatic origin. Its xenomorphic and...exsolutions indicate its growth at the expense of magnetite under oxidizing conditions. Occurrence of chromitites... Key words ophiolite, Variscan, ferrogabbro, chromitite, silicious inclusions, spreading rate 1 1 |  | | Journal (article/letter/editorial) | | include variably deformed banded and podiform chromitite bodies made up of massive, semi-massive, nodular...Compositional data indicate that these high-Cr chromitite bodies crystallized from melts of boninitic affinities...associated with clinochlore even in unaltered chromitite specimens and the degree of serpentinization...igneous origin. However, the general association of chromitite with dunite implies the involvement of melt–rock... 1995; Matveev and Ballhaus, 2002). Podiform chromitite is regularly regarded as an important petrotectonic |  | Benham, A. J., Kováč, P., Petterson, M. G., Rojkovic, I., Styles, M. T., Gunn, A. G., McKervey, J. A., Wasy, A. (2009) Chromite and PGE in the Logar Ophiolite Complex, Afghanistan. Applied Earth Science, 118 (2) 45-58 doi:10.1179/174327509x434957 | Journal (article/letter/editorial) | | this study. The first type is a low Cr, PGE-poor chromitite interpreted to have been produced in a mid ocean...orthopyroxenite dykes are also commonly associated with outcrops of chromite. Although Hafisi21 mapped much of...irregular-shaped bodies of dominantly massive chromitite. Subsequent work by the Federal Institute for...fabric/fracturing parallel to the contact with the chromitite. The USBM also undertook trenching, sampling...remaining in place consists of massive 8 Massive chromitite in the side of the C1 chromite quarry (34u 139 |  | | Book | | eastern section of Europe. The Sea of Marmara, which is an inland sea, together with the Dardanelles...by the Mediterranean Sea to the south, the Aegean Sea to the west and the Black Sea to the north – Turkey...felsic-intermediate magmatism; manganese, iron, red bed-type iron, copper, phosphate, strata-bound barite-lead...deposits. Chapter 3 deals with ophiolites and chromitite deposits as important production and export items......................... M. Cemal Göncüoğlu 3 Chromitite Deposits of Turkey in Tethyan Ophiolites.... |  | | Journal (article/letter/editorial) | | six platinum group elements (PGE) in podiform chromitite with maximum values of 2,570 ppb Pt, 6,870 ppb...The unaltered centers of chromite grains in the chromitite within this complex have an unusually large range...range of chromitite compositions from 39 to 69 wt percent Cr2O3, type 2 occurs in chromitite having a...to 61 wt percent Cr2O3 , and type 3 occurs in chromitite having a range of 39 to 51 wt percent Cr2O3....some Pt and Rh, occurred across the range of chromitite composition. Crystallization of Pd with some |  | | Journal (article/letter/editorial) | | over 350 km strike length of the Oman ophiolite. Chromitite compositions form a continuum from cr# = 0.501.... . . . . . . . . . . . Relationship between chromitite compositions and geological setting . . . . ... . . . . . . . . 6.1. Structural controls on chromitite genesis . . . . . . . . . . . . . . . 6.2. The...Here we present new data for six other podiform chromitite localities from the Oman ophiolite and additional...located about 3 km from the Moho. There the main chromitite body is tabular, about 5 m thick and with a gentle |  | Berger, Julien, Diot, Hervé, Lo, Khalidou, Ohnenstetter, Daniel, Féménias, Olivier, Pivin, Marjorie, Demaiffe, Daniel, Bernard, Alain, Charlier, Bernard (2013) Petrogenesis of Archean PGM-bearing chromitites and associated ultramafic–mafic–anorthositic rocks from the Guelb el Azib layered complex (West African craton, Mauritania) Precambrian Research, 224. 612-628 doi:10.1016/j.precamres.2012.10.005 | Journal (article/letter/editorial) | | association of highly calcic anorthosite and Fe-rich chromitite in ultramafic–mafic layered intrusions is almost...1996; Mouri et al., 2009). Archean anorthosite–chromitite complexes in the Australian Pilbara craton have...lavas), banded iron formation (BIF), cipolin and chromitite/anorthositebearing mafic–ultramafic layered complexes...Guelb el Azib complex with the location of chromitite outcrops in the area. The rectangle refers to bloc...(A) layered chromitite; (B) brecciated and retrogressed chlorite chromitite; (C) chromitite pod in a l |  | | Book | | emanations (essentially hydrothermal fluids) reaching the sea floor. In the Introduction to Memoir 131, I said...Paleozoic beds in the Azegour dis trict; their outcrops are grouped in four principal bands that strike...lies a thin formation of reddish conglomerate and red clays that may be Permo-Triassic, Permian, or even...deposited from volcanic exhala tions that reached the sea floor to deposit their loads. If the latter is correct...MINERAL DEPOSITS MELILLA Middle Tertiary Iron as Magnetite^ Hypothermal-2 Secondary Hematite and Limonite |
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