Results 121 to 130 of about 194 (169)

U-Pb geochronology documents out-of-sequence emplacement of ultramafic layers in the Bushveld Igneous Complex of South Africa. [PDF]

Nat Commun, 2016
Mungall JE, Kamo SL, McQuade S.
europepmc   +1 more source

Sulfur and metal fertilization of the lower continental crust. [PDF]

Lithos, 2016
Locmelis M, Fiorentini ML, Rushmer T, Arevalo R, Adam J, Denyszyn SW.   +5 more
europepmc   +1 more source

Zircon behavior in the partially melted planetary mantle

Yakimenko A, Borisova A, Fedortchouk Y, Fairhurst L.   +3 more
europepmc   +1 more source

Podiform chromitites possibly recycled within the mantle

Japanese Magazine of Mineralogical and Petrological Sciences, 2012
openaire   +2 more sources

The significance of water in the genesis of ophiolitic chromitites

Lithos
openaire   +1 more source

Hydrothermal Chromitites from the Oman Ophiolite: The Role of Water in Chromitite Genesis

Minerals (Basel, Switzerland), 2020
The role of water-rich solutions in the formation of chromitites has been the matter of controversy. We found small chromite concentrations (chromitites) in diopsidites, precipitated from high-temperature hydrothermal fluids, in the mantle to the crust of the Oman ophiolite. Here, we present petrologic characteristics of the hydrothermal chromitites to
Akira Ishikawa, Norikatsu Akizawa, Shoji Arai   +2 more
exaly   +2 more sources

Conversion of low-pressure chromitites to ultrahigh-pressure chromitites by deep recycling: A good inference

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-
Shoji Arai
exaly   +2 more sources

Chromitite genesis based on chrome-spinels and their inclusions in the Sartohay podiform chromitites in west Junggar of northwest China

Ore Geology Reviews, 2020
Abstract Primary high-Al [Cr# = 100 × Cr/(Cr + Al) of 48.2–54.7] chromitites coupled with high-Cr (Cr# = 70.9–80.7) chromitite fragments are identified in the podiform chromitites hosted by the Sartohay ophiolitic melange in west Junggar, northwest China.
Yongfeng Zhu
exaly   +2 more sources

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Peridotites, chromitites and diamonds in ophiolites

Nature Reviews Earth & Environment, 2021
Ophiolites, which represent segments of oceanic lithosphere obducted onto the continental crust, provide an important window into processes such as continental rifting, mantle melting, asthenospheric upwelling and cooling of oceanic lithosphere. Traditionally, research has focused on crustal sections of ophiolites.
Jingsui Yang, Weiwei Wu, Dongyang Lian, Huichao Rui   +3 more
openaire   +1 more source

Petrogenesis of ophiolitic chromitite

Geological Society, London, Special Publications, 1993
Abstract Chromite deposits comprise an integral part of the mantle sequences observed within many ophiolite complexes; in particular, those where a harzburgite is the dominant mantle sequence lithology. The chromite segregations are invariably contained within a dunite envelope and show a wide variety of ore textures, some of which are ...
Stephen Roberts, Christopher Neary
openaire   +1 more source