Results 31 to 40 of about 971 (142)

Neoproterozoic ultramafic and mafic magmatism in the Eastern Cordillera of the central peruvian Andes: the Tapo Massif [PDF]

, 2010
A highly dismembered assemblage of ultramafic and mafic rocks is exposed in the Eastern Cordillera of the Central Peruvian Andes, extending along a discontinuous NW-SE belt over some 250 km between 12° and 9° S of latitude.
Acosta, Jorge, Castroviejo Bolibar, Ricardo, Pereira, Eurico, Rodrigues, Jose F., Tassinari, Colombo G.   +4 more
core   +2 more sources

Recycling Subducted Organic Carbon as Diamonds: An Example From the New Caledonia Forearc Ophiolite

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract Micro‐diamonds and moissanite (SiC) have been identified in ophiolitic mantle harzburgites and chromitites of the New Caledonian Peridotite Nappe. The pale yellow (100–250 μm) micro‐diamonds and light blue moissanite (mean −26.5‰, range −33.5‰ to −23.8‰ and mean −26.9‰, range −31.8‰ to −25.6‰ respectively) exhibit consistently strong negative ...
Jonathan C. Aitchison, Daniel Patias, Dominique Cluzel, Trevor R. Ireland, Renjie Zhou, Dongyang Lian, Jingsui Yang, Zhen Yan   +7 more
wiley   +1 more source

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

, 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.
Cooper, R. W., Garuti, G., Lenaz, D., Princivalle, F., Zaccarini, F.   +4 more
core   +3 more sources

Chromitite deposits of Ufaley ultramafic massif (South Urals)

Georesursy
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   +1 more source

Metal-saturated sulfide assemblages in NWA 2737: Evidence for impact-related sulfur devolatilization in Martian meteorites [PDF]

, 2012
International audienceNWA 2737, a Martian meteorite from the Chassignite subclass, contains minute amounts (0.010 ± 0.005 vol%) of metal-saturated Fe-Ni sulfides.
Barton P. B., Bennet C. E. G., Brearley A. J., Carpenter R. H., Clarke R. Y., Delaney J. S., Ewers W. E., Ikeda Y., Karup‐Møller S., Kimura M., Kullerud G., McSween H. Y., Vaughan D. J.   +12 more
core   +4 more sources

Podiform Chromitites in the Sorkhband Ultramafic Complex, Southern Iran: Evidence for [PDF]

Journal of Sciences, Islamic Republic of Iran, 2008
The podiform chromitite deposits of the Ordovician Sorkhband ultramafic complex, southwestern Makran, are the largest chromitite deposits in Iran. The Sorkhband ultramafic complex comprises of a northern part of dunite, podiform chromitite, olivine ...
doaj  

Geochemistry of podiform chromitite and host rocks within the Buem Structural Unit, Northwestern Benin Republic: Implications for the geodynamic evolution of the Dahomeyide orogenic belt

Results in Earth Sciences
The paper presents the geochemistry, origin and geodynamic setting of podiform chromitite and host rocks from the Buem Structural Unit (BSU) in the northwestern Benin Republic.
Daniel N. Kouagou N’Dah, Samuel B. Olobaniyi, Luc C. Adissin Glodji, Sory I.M. Konate, Elhadji Mory Traore, Daniel Kwayisi, Clement B. N’Satta, Ibrahim S. Yerima   +7 more
doaj   +1 more source

The genesis and tectonic significance of chromitite-bearing serpentinites in southern NSW [PDF]

, 1998
University of Technology, Sydney. Faculty of Science.The Tumut Serpentinite Province consists of four major serpentinite belts and numerous small serpentinite bodies, that occupy a long narrow tract within the Lachlan Fold Belt of southern NSW.
Graham, IT
core  

The chromitites of the Neoproterozoic Bou Azzer ophiolite (Central Anti-Atlas, Morocco) revisited [PDF]

, 2022
The Neoproterozoic Bou Azzer ophiolite in the Moroccan Anti-Atlas Panafrican belt hosts numerous chromitite orebodies within the peridotite section of the oceanic mantle.
Colás, Vanessa, Domínguez-Carretero, Diego, Garcia-Casco, Antonio, González Jiménez, José María, Haissen, Faouziya, Ikenne, Moha, Maacha, Lhou, Proenza Fernández, Joaquín Antonio, Pujol Solà, Núria   +8 more
core   +1 more source

Chromespinel and Magnetite as Indicators for Recognition of Genesis and History of Serpentinites in Baft Ophiolite Mélange (Kerman Province in Iran) [PDF]

Journal of Sciences, Islamic Republic of Iran, 2013
Baft ophiolite mélange is a part of Naein-Baft ophiolite (southeast of Kerman province in Iran). Serpentinites from Baft ophiolite mélange contain different types of spinels such as chromite, chromespinel, ferritchromite and magnetite which can reveal ...
N. Mohammadi, H. Ahmadipour
doaj