Results 51 to 60 of about 2,033 (198)
Results in Earth SciencesThe 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 +7 more
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Composition and Provenance of Victoria Group Sandstones in Southern North Victoria Land, Antarctica
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.Three distinct source areas contributed to sandstones of the Victoria Group within the Transantarctic Basin in southern North Victoria Land. During the Permian, quartzose sandstones were derived from erosion of the local Ross Orogen, likely from an uplifted swell in the area of today's Ross Sea, the Ross High.
Martin Elsner +6 more
wiley +1 more source
Beach Gold and Heavy Mineral Concentrates on Tiwai Spit Gravel Strand Plain, Southland, New Zealand
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.The Holocene Tiwai Spit on Foveaux Strait is a 12 km by 2 km gravel‐dominated strand plain, ∼10 m above present sea level. Gravel clasts are dominated by well‐rounded quartz cobbles, pebbles and granules derived from Otago Schist 200 km to the north in evolving river drainage systems during late Cenozoic.
Marshall Palmer, Dave Craw
wiley +1 more source
Cryptic Superfine Placer Gold Populations, Round Hill Mine, Southern New Zealand
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.Superfine (50–<1 µm) detrital gold and platinum group mineral (PGM) particles at the Round Hill mine near Foveaux Strait were locally derived (<20 km) from as‐yet undefined basement sources. This superfine component contrasts with the dominant coarser (typically >100 µm) gold and PGM particles at the mine that have been transported for >100 km in ...
Marshall Palmer, Dave Craw
wiley +1 more source
Journal of Economic Geology, 2013 Mafic and ultramafic plutonic igneous bodies, with small and big outcrops, between Shemshak rock units (Jurassic) are observed in east of Imam Zadeh Hashem, in southern Guilan province.
Mojgan Salavati, Reza Fahim Guilani
doaj
Exploring gold mineralization in altered ultramafic rocks in south Abu Marawat, Eastern Desert, Egypt. [PDF]
Sci Rep, 2023 Eldougdoug A +6 more
europepmc +1 more source
Ecological Research, Volume 41, Issue 5, September 2026.Potentially toxic metal(loid)s (PTMs) bioaccumulated across a plant‐herbivore‐predator food chain. Irrespective of soil concentrations, female crickets actively selected PTM‐enriched leaves, while predatory mantids showed no developmental impairment. Trophic transfer of PTMs was rather influenced more by a function of intrinsic species traits than by ...
João Marcelo‐Silva +3 more
wiley +1 more source
Oxide-silicate petrology and geochemistry of subducted hydrous ultramafic rocks beyond antigorite dehydration (Central Alps, Switzerland). [PDF]
Contrib Mineral Petrol, 2023 Vieira Duarte JF +3 more
europepmc +1 more source
High Melt Fraction Induced by the Dehydration Melting Near the 410‐km Discontinuity
Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.Abstract The water‐rich mantle transition zone, coupled with the low water storage capacity of the upper mantle, suggests that dehydration melting occurs just above the mantle transition zone near the 410‐km discontinuity. However, the melt fraction produced by the dehydration melting process remains poorly constrained.
Juan Chen +5 more
wiley +1 more source
Geologica Acta, 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-
J.F. LEWIS +4 more
doaj +1 more source