Results 1 to 10 of about 4,404 (193)

Chromitite layers indicate the existence of large, long-lived, and entirely molten magma chambers [PDF]

open access: yesScientific Reports, 2022
The classical paradigm of the ‘big magma tank’ chambers in which the melt differentiates, is replenished, and occasionally feeds the overlying volcanos has recently been challenged on various grounds.
Rais Latypov   +8 more
doaj   +3 more sources

Widespread abiotic methane in chromitites [PDF]

open access: yesScientific Reports, 2018
Recurring discoveries of abiotic methane in gas seeps and springs in ophiolites and peridotite massifs worldwide raised the question of where, in which rocks, methane was generated.
G. Etiope   +8 more
doaj   +4 more sources

Chromite chemistry of a massive chromitite seam in the northern limb of the Bushveld Igneous Complex, South Africa: correlation with the UG-2 in the eastern and western limbs and evidence of variable assimilation of footwall rocks. [PDF]

open access: yesMiner Depos, 2021
The Bushveld Igneous Complex (BIC) is known for its laterally extensive platinum group element–bearing layers, the most famous being the Merensky Reef and the UG-2 chromitite in the eastern and western limbs of the complex.
Langa MM   +5 more
europepmc   +2 more sources

Chromitite deposits of Ufaley ultramafic massif (South Urals)

open access: yesGeoresursy, 2022
Data on the morphology, composition, textural and structural features of chromite deposits of the Ufaley ultramafic massif are presented. The mineralogical and compositional features of the host ultramafic rocks allow us to interpret them as depleted ...
D. E. Saveliev
doaj   +2 more sources

Morphological, textural and structural features of chromitite deposits of Main ore field of Kempirsay massif (South Urals, Kazakhstan)

open access: yesGeoresursy, 2022
In the paper data of morphology, textural and structural features of chromitites from deposits of southeast part of Kempirsay massif (South Urals, Kazakhstan) are summarized. It is showed that formation of unique chromium deposits is closely related with
D. E. Saveliev   +3 more
doaj   +2 more sources

Exotic accessory minerals in layered chromities of the Campo Formoso complex (Brazil) [PDF]

open access: yesGeologica Acta, 2006
The Campo Formoso stratiform intrusive complex, in Bahia State, Brazil, considered to be of Paleoproterozoic age, consists of a tabular body of ultramafic rocks about 40 km long and 100-1100 m wide.
F. ZACCARINI, G. GARUTI, R. MARTIN
doaj   +4 more sources

Diamond and Other Exotic Mineral-Bearing Ophiolites on the Globe: A Key to Understand the Discovery of New Minerals and Formation of Ophiolitic Podiform Chromitite

open access: yesCrystals, 2021
Ophiolite-hosted diamond from peridotites and podiform chromitites significantly differs from those of kimberlitic diamond and ultra-high pressure (UHP) metamorphic diamond in terms of occurrence, mineral inclusion, as well as carbon and nitrogen ...
Fei Liu   +3 more
doaj   +2 more sources

Metamorphism on Chromite Ores from the Dobromirtsi Ultramafic Massif, Rhodope Mountains (SE Bulgaria) [PDF]

open access: yesGeologica Acta, 2009
Podiform chromitite bodies occur in highly serpentinized peridotites at Dobromirtsi Ultramafic Massif (Rhodope Mountains, southeastern Bulgaria). The ultramafic body is believed to represent a fragment of Palaeozoic ophiolite mantle.
J.M. GONZÁLEZ JIMÉNEZ   +3 more
doaj   +9 more sources

Landsat-8 data for chromite prospecting in the Logar Massif, Afghanistan [PDF]

open access: yesHeliyon, 2018
Chromite is widely distributed in the east and southeast of Afghanistan, especially in Logar Province. Chromite mineralization is podiform-type and is hosted in the stratigraphically lowest ultramafic rocks of the Logar Ophiolite Complex.
Ramadan Abdelaziz   +2 more
doaj   +2 more sources

The Stillwater Complex chromitites: The response of chromite crystal chemistry to magma injection [PDF]

open access: yesGeologica Acta, 2012
Nineteen chromite crystals from the A, B, E, G, H, J and K chromitite layers of the Peridotite Zone of the Stillwater Complex (Montana, USA) have been studied by means of X-ray single crystal diffraction and microprobe analyses.
D. LENAZ   +4 more
doaj   +5 more sources

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