Results 61 to 70 of about 1,482 (158)
Origin of chromitite-anorthosite interlayering in the Bushveld Complex [PDF]
An idealized stratigraphic section of the five main chromitite-bearing cyclic units of the Upper Critical Zone of the Bushveld Complex typically consists of basal chromitite overlain by pyroxenite, norite, and anorthosite.
Barnes, Sarah-Jane, Maier, Wolfgang
core +1 more source
PETROLOGICAL EVIDENCES OF SYNDEFORMATION SEGREGATION OF CHROMITES DURING DUNITE FORMATION: EXAMPLE OF KRAKA OPHIOLITES, SOUTH URALS [PDF]
Минералогия, 2016 Results of structural and mineralogical studies of chromitite-bearing zone localized in spinel peridotites of the Middle Kraka ophiolite massif are presented.
D.E. Saveliev +4 more
doaj
Exhumed Serpentinites and Their Tectonic Significance in Non‐Collisional Orogens
Geochemistry, Geophysics, Geosystems, Volume 25, Issue 2, February 2024.Abstract Exhumed serpentinites are fragments of ancient oceanic lithosphere or mantle wedge that record deep fluid‐rock interactions and metasomatic processes. While common in suture zones after closure of ocean basins, in non‐collisional orogens their origin and tectonic significance are not fully understood.
Damián Donoso‐Tapia +4 more
wiley +1 more source
Magnesium isotope constraints on the origin of stratiform chromitite [PDF]
peer reviewedResolving the debate on whether magmas are saturated solely in chromite or if chromite reaches a cotectic with other liquidus phases before segregating is crucial to understanding the origin of stratiform chromitite.
Xiao, Yan +5 more
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Mineralogical study of rodingitized microgabbros and associated chromitite seams from the Nain ophiolite, Central Iran [PDF]
, 2019 The Nain-Dehshir-Baft Ophiolitic Belt (NDBOB), which crops out along the Nain-Baft fault, around the Central Iranian Microcontinent (CIM), comprises a set of dismembered ultramafic, mafic and sedimentary complexes.
Giovanni Grieco +3 more
core +2 more sources
Frontiers in Earth Science, 2020 The most abundant terrestrial lavas, mid-ocean ridge basalt (MORB) and ocean island basalt (OIB), are commonly considered to be derived from a depleted MORB-mantle component (DMM) and more specific, variably enriched mantle plume sources.
Anastassia Y. Borisova +13 more
doaj +1 more source
Geologica Acta, 2015 The Mesoarchean chromitites in the Singhbhum craton provide the main source of chromium in India. We report here results of dating zircon grains that were found in the chromitite of ultramafic rocks belonging to the southern part of the Archean Baula ...
P. V. SUNDER-RAJU, E. HANSKI, Y. LAHAYE
doaj
Mineralogical and geochemical features of chromitites of the Apshak area (South Kraka ultramafic massif, South Urals) [PDF]
МинералогияMineral composition of chromitites of the Apshak area in the northwestern part of the South Kraka massif (the largest representative of the Kraka group ophiolites), which is confined to the northern closure of the Zilair Synclinorium on the western slope
T.D. Shabutdinov +2 more
doaj +1 more source
, 2015 The Shetland ophiolite, located to the NE of the Scottish mainland contains podiform chromitites. Two of these are known to host extremely anomalous PGE concentrations.
Brough, Chris +4 more
core +1 more source
The silicate mineralogy of the MG4 chromitite package in the eastern part of the Bushveld complex, South Africa [PDF]
, 2011 Dissertation (MSc)--University of Pretoria, 2011.Stratiform chromitite layers are peculiar to large layered mafic intrusions. The origin of these chromitite layers has been widely debated. Some petrologists suggested that the layers formed as a result of
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