Results 81 to 90 of about 3,682 (259)

Seismic imaging of the complex geological structures in the southwestern edge of the Western limb, Bushveld Complex through focusing pre‐stack depth migration of legacy 2D seismic data

Geophysical Prospecting, Volume 72, Issue 7, Page 2504-2519, September 2024.
Abstract We reprocessed a 50‐km long legacy 2D reflection seismic profile acquired in 1986, under a project funded by the National Geophysics Program to improve the delineation of complex geological structures that host the platinum‐bearing horizons (known as the UG2 reef; a chromitite horizon) on the south‐eastern edge of the Western limb of the ...
Mpofana Sihoyiya, Felix Hloušek, Musa S. D. Manzi, Moyagabo K. Rapetsoa, Stefan Buske, David Khoza   +5 more
wiley   +1 more source

Platinum group element mineralization at Musongati (Burundi) : concentration and Pd-Rh distribution in pentlandite [PDF]

, 2017
The mafic-ultramafic intrusions of the Karagwe-Ankole belt in Burundi are considered as a new potential source for platinum group elements (PGE). The intrusions have mainly been studied for their PGE potential with regard to PGE concentration, but the ...
Dewaele, Stijn, Muchez, Philippe, Paredis, Bram   +2 more
core   +1 more source

Solid Inclusions in Au-nuggets, genesis and derivation from alkaline rocks of the Guli Massif, Northern Siberia

Open Geosciences, 2016
A total of 112 Au-nuggets, collected from alluvial placer deposits of the Ingarinda River from the Guli massif, located in northem Siberia, Russia, were investigated.
Dvorani Sami N.
doaj   +1 more source

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

Multi‐geophysical methods for characterizing fractures in an open pit mine, western Bushveld Complex, South Africa

Geophysical Prospecting, Volume 72, Issue 5, Page 1950-1970, June 2024.
Abstract In the Bushveld Complex, South Africa, open pit mines are faced with a challenge of rock slope stability due to geological structures (fractures, faults and dykes) that compartmentalize the rock mass. Geophysical surveys (seismics, magnetics and electrical methods) were conducted in a 0.2 km2 area at Tharisa mine, with the goal to delineate ...
Moyagabo K. Rapetsoa, Sikelela Gomo, Musa S. D. Manzi, Ian James, Jureya Dildar, Mpofana Sihoyiya, Ndamulelo Mutshafa, Raymond J. Durrheim   +7 more
wiley   +1 more source

The Nidar Ophiolite and its surrounding units in the Indus Suture Zone (NW Himalaya, India): new field data and interpretations [PDF]

, 2015
The Nidar Ophiolite is located between the North Himalayan nappes and the Indus Suture Zone in NW Himalaya in eastern Ladakh (India). Based mainly on geochemical argument, this ophiolite is classically interpreted as a relic of an intra-oceanic arc ...
Buchs, N., Epard, J.-L.
core   +3 more sources

Chromitites: An Enigmatic Mantle Rock Type

Chigaku Zasshi (Jounal of Geography), 2010
Various characteristics of podiform chromitites, an enigmatic mantle rock member, are reviewed in this article. Chromitites are composed of chromian spinel, with the general formula (Mg, Fe2+)(Cr, Al, Fe3+)2O4, and silicates (mainly olivine). The Fe3+ content is generally very low, being less than 0.1 to all trivalent cations, in mantle chromian ...
openaire   +1 more source

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.
Qingmin Zhu, Yongfeng Zhu
openaire   +1 more source

Probing the 186Os/188Os Precision Barrier: New Recommended Values for the DROsS Reference Material and an Assessment of Mixed 1011 and 1012 Ω Amplifier Arrays

Geostandards and Geoanalytical Research, Volume 48, Issue 1, Page 109-132, March 2024.
Key Points Most precise 184Os/188Os ratio yet measured: 0.0013036 ± 0.0000007. New recommended values for DROsS: 186Os/188Os = 0.1199319 ± 0.0000024, 187Os/188Os = 0.1609227 ± 0.0000022, 189Os/188Os = 1.219709 ± 0.000010, 190Os/188Os = 1.983793 ± 0.000011.
Pedro Waterton, Sarah Woodland, Graham Pearson, Simon Hansen Serre, Kristoffer Szilas   +4 more
wiley   +1 more source

Ophiolite-Related Ultramafic Rocks (Serpentinites) in the Caribbean Region : a Review of their Occurrence, Composition, Origin, Emplacement and Ni-Laterite Soil Formation [PDF]

, 2006
Ultramafic rocks, mainly serpentinized peridotites of mantle origin, are mostly associated with the ophiolites of Mesozoic age that occur in belts along three of the margins of the Caribbean plate. The most extensive exposures are in Cuba. The ultramafic-
Draper, G., Espaillat, J., Jiménez, J., Lewis, J. F., Proenza, J. A.   +4 more
core   +4 more sources