A revised map of volcanic units in the Oman ophiolite: insights into the architecture of an oceanic proto-arc volcanic sequence [PDF]
Solid Earth, 2019 Numerous studies have revealed genetic similarities between Tethyan ophiolites and oceanic “proto-arc” sequences formed above nascent subduction zones. The Semail ophiolite (Oman–U.A.E.) in particular can be viewed as an analogue for this proto-arc crust.
T. M. Belgrano +6 more
doaj +1 more source
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
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
Experimental petrology constraints on the recycling of mafic cumulate:a focus on Cr-spinel from the Rum Eastern Layered Intrusion, Scotland [PDF]
, 2015 Reactive liquid flow is a common process in layered intrusions and more generally in episodically refilled magma chambers. Interaction between newly injected melt and cumulates, or crystal mushes, perturbs the liquid line of descent of the melt and ...
Blundy, Jonathan D +2 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
Possible sub‐arc origin of podiform chromitites
Island Arc, 1995 Abstract The sub‐arc mantle condition possibly favors the formation of podiform chromitites. The Cr/(Cr + Al) atomic ratio (= Cr#) of their chromian spinel frequently is higher than 0.7, which is comparable with the range for arc‐related primitive magmas. This almost excludes the possibility of their sub‐oceanic origin, because both oceanic peridotites
Shoji Arai, Hisayoshi Yurimoto
openaire +1 more source
Melt densities in the Na2O-FeO-Fe2O3-SiO2 system and the partial molar volume of tetrahedrally-coordinated ferric iron in silicate melts [PDF]
, 1988 The densities of 12 melts in the Na2O-FeO-Fe2O3-SiO2 system have been determined in equilibrium with air, in the temperature range of 1000–1500°C, using the double bob, Archimedean technique.
Brearley, Mark +2 more
core +1 more source
Earth and Planetary Science Letters, 2013 AbstractPodiform chromitites have been interpreted as a peridotite/melt reaction product within the upper mantle (= low-P chromitites). Some of them, however, contain ultrahigh-pressure (UHP) minerals such as diamond and coesite (= UHP chromitites). The UHP chromitites can be produced by deep recycling of low-P chromitites via mantle convection. Carbon-
openaire +1 more source
Compositional variation of laurite at Union Section in the Western Bushveld Complex [PDF]
, 1999 One hundred and forty five grains of laurite in polished sections of samples from one borehole through the major chromitite layers and some chromite-bearing silicate rocks of the Lower and Critical Zones of the western Bushveld Complex at Union Section ...
Barnes, Sarah-Jane +3 more
core +1 more source
Cu-Ni-PGE mineralisation at the Aurora Project and potential for a new PGE province in the Northern Bushveld Main Zone [PDF]
, 2018 This is the final version of the article. Available from Elsevier via the DOI in this record.he Aurora Project is a Cu-Ni-PGE magmatic sulphide deposit in the northern limb of the Bushveld Complex of South Africa.
Boyce, AJ +4 more
core +1 more source