Results 61 to 70 of about 4,473 (252)

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

AI‐Driven Advances in Sustainable Materials for Green Energy: From Innovation to Lifecycle Management

SusMat, Volume 5, Issue 5, October 2025.
This review examines artificial intelligence (AI) applications across the complete lifecycle of sustainable materials for green energy. In the design phase, we review predictive algorithms and generative models as discovery approaches. The synthesis section covers AI‐optimized manufacturing processes, robotic experimentation, and automated ...
Yuehui Xian, Cheng Li, Yangyang Xu, Yumei Zhou, Dezhen Xue   +4 more
wiley   +1 more source

First crystal-structure determination of chromites from an acapulcoite and ordinary chondrites [PDF]

, 2015
We report the first crystal structure determinations of chromites from an acapulcoite and from ordinary chondrites. Cell edges range from 8.3212 (3) to 8.3501 (1) \uc5, while the oxygen positional parameters are in the range 0.2624 (3) to 0.26298 (9 ...
Lenaz, Davide, Princivalle, Francesco, Schmitz, Birger   +2 more
core   +1 more source

Magnetotellurics Point to Serpentinization as a Potential Source of Hydrogen in the Bulqizë Ophiolite

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract Hydrogen was first detected in the Bulqizë ophiolite massif (Albania) in 1992, and its origin remains uncertain, with hypotheses ranging from active serpentinization to the release of trapped, fossil H2. To constrain the thickness of the ophiolite layer—a key parameter for evaluating hydrogen generation—we conducted a magnetotelluric survey ...
Yan Yao, Frédéric‐Victor Donzé, Mathieu Persem, Laurent Truche, Bardhyl Muceku, Stéphane Garambois, Ivan Vujevic, Nicolas Lefeuvre, Edmond Goskolli   +8 more
wiley   +1 more source

Re−Os Isotope and PGE Abundance Systematics of Coast Range Ophiolite Peridotites and Chromitite, California: Insights into Fore-Arc Magmatic Processes [PDF]

Lithosphere
We report platinum-group element (PGE) and Re concentrations, and Re−Os isotopic data for peridotites and podiform chromitite from the mid-Jurassic Coast Range ophiolite (CRO), California.
Sung Hi Choi, Samuel B. Mukasa, John W. Shervais, Igor S. Puchtel   +3 more
doaj   +1 more source

The podiform chromitites in the Dagküplü and Kavak mines, Eskisehir ophiolite (NW-Turkey) : genetic implications of mineralogical and geochemical data [PDF]

, 2009
Mantle tectonites from Eskisehir (NW-Turkey) include high-Cr chromitites with limited variation of Cr#, ranging from 65 to 82. Mg# ratios are between 54 and 72 and chromite grains contain up to 3.71 wt% Fe2O3 and 0.30 wt% TiO2.
Garuti, G., Sadiklar, M.B., Tarkian, M., Thalhammer, O.A.R., Uysal, I., Zaccarini, F.   +5 more
core   +3 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

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  

Chemical Characterization of Chromite from the Crominia and Mairipotaba Massifs, Goiás, Brazil [PDF]

Geologia USP. Série Científica, 2010
Metaultramafi c bodies tectonically emplaced within the metasedimentary sequence of the Araxá Group are associatedwith an ophiolitic melange in southeast Goiás. In the region of Cromínia - Mairipotaba, they occur as lenticular bodiesaligned E-W. Cumulate
Nélson Angeli, Guillermo Rafael Beltran Navarro, Antenor Zanardo, Silvio Roberto Farias Vlach   +3 more
doaj  

The Troia–Pedra Branca mafic–ultramafic complex, Borborema Province, Brazil: Records of 2.04 Ga post–collisional Alaskan–type magmatism and PGE mineralization

Journal of the Geological Survey of Brazil, 2021
The Troia–Pedra Branca complex is the most extensive exposure of mafic–ultramafic rocks in the Borborema Province, northeastern Brazil. Chromitite occurrences in this unit are known for a long time, particularly because of its platinum group element (PGE)
Felipe Grandjean da Costa, Wagner da Sila Amaral, Hector Rolando Barrueto, João Luiz Carneiro Naleto, Joseneusa Brilhante Rodrigues, Iaponira Paiva Gomes   +5 more
doaj   +1 more source