Results 131 to 140 of about 194 (169)
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Chromitites in ophiolites: How, where, when, why? Part II. The crystallization of chromitites
Lithos, 2014Abstract A review of previous work relevant to the formation of concentrations of chromite in peridotites from ophiolitic (s.l.) sequences highlights some of the key problems in understanding the complex processes involved. This review forms the basis for chromitite-genesis models that integrate new geochemical data with petrologic, field and ...
Griffin, William L. +7 more
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Formation and modification of chromitites in the mantle
Lithos, 2016Abstract Podiform chromitites have long supplied us with unrivaled information on various mantle processes, including the peridotite-magma reaction, deep-seated magmatic evolution, and mantle dynamics. The recent discovery of ultrahigh-pressure (UHP) chromitites not only sheds light on a different aspect of podiform chromitites, but also changes our ...
Shoji Arai, Makoto Miura
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Bulletin de la Société française de Minéralogie, 1912
Yovitchitch Mil. Z. Chromitite. In: Bulletin de la Société française de Minéralogie, volume 35, 6, 1912. pp. 511-516.
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Yovitchitch Mil. Z. Chromitite. In: Bulletin de la Société française de Minéralogie, volume 35, 6, 1912. pp. 511-516.
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Chromitite Deposits of Turkey in Tethyan Ophiolites
2019Some parts of the Tethyan ophiolites of Alpine-Himalayan suture belt are located within Turkey. The Tethyan belt splits into two branches in Turkey. The northern branch follows the Izmir-Ankara-Erzincan Zone, while the southern branch extends along the Anatolide-Tauride and Bitlis-Zagros suture zone. The subsections of the latter reach Iran in the east
Çiftçi Y. +3 more
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Advances in the understanding of chromitite deposits
Applied Earth Science, 2009Chromitites in ophiolites and layered intrusions are the primary source of high quality chromium ore. Some chromitites can also carry significant concentrations of the platinum-group elements (PGE) and in the case of the Upper Group 2 (UG2) chromitite of the Bushveld Complex (South Africa) the PGE are the primary resource.
Mondal, Sisir Kanti, McDonald, Iain
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Lithos, 2021
Abstract Podiform chromitites are unique rock units of ophiolites and ophiolitic melanges and represent invaluable repositories that reliably record the formation environment and evolution of their source and host rocks. However, there are relatively few podiform chromitites reported from Archean terranes. Here we document the major, minor, and trace
Yang Huang +8 more
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Abstract Podiform chromitites are unique rock units of ophiolites and ophiolitic melanges and represent invaluable repositories that reliably record the formation environment and evolution of their source and host rocks. However, there are relatively few podiform chromitites reported from Archean terranes. Here we document the major, minor, and trace
Yang Huang +8 more
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Origin of podiform chromitites
Journal of Asian Earth Sciences, 1997Abstract Podiform chromitite with a dunite envelope can be interpreted to be a product ofinteraction between mantle harzburgite and an exotic magma, combined with magma mixing. The secondary Si- and Cr-rich melt which is produced by the selective dissolution of orthopyroxene can be mixed with a subsequently supplied primitive melt with the mixed melt
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The Canadian Mineralogist, 2017
Abstract Chromitites found in layered intrusions and ophiolite complexes are generally enriched in platinum-group elements (PGE), especially IPGE ( i.e ., Ir, Os, Ru)-bearing platinum-group minerals (PGM), and the chromitites are usually poor in base metal sulfide (BMS) minerals.
Prichard, Hazel Margaret +4 more
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Abstract Chromitites found in layered intrusions and ophiolite complexes are generally enriched in platinum-group elements (PGE), especially IPGE ( i.e ., Ir, Os, Ru)-bearing platinum-group minerals (PGM), and the chromitites are usually poor in base metal sulfide (BMS) minerals.
Prichard, Hazel Margaret +4 more
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A shallow origin for diamonds in ophiolitic chromitites
Geology, 2018Recent findings of diamonds in ophiolitic peridotites and chromitites challenge our traditional notion of Earth mantle dynamics. Models attempting to explain these findings involve incorporation of diamonds into chromite near the mantle transition zone. However, the occurrence of metastable diamonds in this context has not been considered.
Farré-de-Pablo, Júlia +7 more
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Mineralium Deposita, 1994
Chromitite xenoliths from the Takashima alkali basalt in the Southwest Japan arc are classified into two types: Type 1 chromitite in thin layers in dunite or wehrlite xenoliths; and Type 2 chromitite in discrete xenoliths which has an orbicular texture, previously documented only from podiform chromitites in ophiolites.
S. Arai, N. Abe
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Chromitite xenoliths from the Takashima alkali basalt in the Southwest Japan arc are classified into two types: Type 1 chromitite in thin layers in dunite or wehrlite xenoliths; and Type 2 chromitite in discrete xenoliths which has an orbicular texture, previously documented only from podiform chromitites in ophiolites.
S. Arai, N. Abe
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