Results 31 to 40 of about 3,531 (178)

Sr-Nd-Hf Isotopic Disequilibrium During the Partial Melting of Metasediments: Insight From Himalayan Leucosome

open access: yesFrontiers in Earth Science, 2022
Radiogenic isotopes of granitoids are widely applied to fingerprint the source of granitoids and study the magma mingling and assimilation processes, aiming to decipher the planetary differentiation.
Lei Yang   +8 more
doaj   +1 more source

Geochemically unravelling the sedimentary components of Archaean metasediments from Western Australia [PDF]

open access: yes, 1996
Major and trace elements of metasediments of the granulite facies Narryer and the amphibolite facies Jack Hills metasediments have been used to devise plots which enable the original sedimentary components of these rocks to be unravelled, despite their ...
Leake, Bernard Elgey
core   +1 more source

Cyclic Brittle‐Ductile Oscillations Recorded in Exhumed High‐Pressure Continental Units: A Record of Deep Episodic Tremor and Slow Slip Events in the Northern Apennines

open access: yesGeochemistry, Geophysics, Geosystems, 2021
The geological record of deep fossil seismogenesis in subduction zones is limited due to common rock overprinting during exhumation and only a few regions expose well‐preserved deeply exhumed structures.
Francesco Giuntoli, Giulio Viola
doaj   +1 more source

The age, geological character and structural setting of quartz-pyrite veins in the Assynt Terrane, Lewisian Complex, NW Scotland. [PDF]

open access: yes, 2011
A set of previously unrecognised quartz-pyrite veins are present in the Assynt Terrane of the mainland Lewisian Complex, NW Scotland. The veins cross-cut the Badcallian and Inverian fabrics, and the Scourie Dykes.
VERNON, ROWAN,EMMA
core  

Geochemistry and Petrogenetic Features of Metasediments in Northern Part of Kushaka and Birnin Gwari Schist Belts NW Nigeria [PDF]

open access: yes, 2021
The Kushaka and Birnin Gwari metasediments and associated banded iron formations constitute important lithological units within the Precambrian Basement Complex.
Danbatta, Umar   +4 more
core   +1 more source

Provenance study of detrital garnets and rutiles from basaltic pyroclastic rocks of Southern Slovakia (Western Carpathians)

open access: yesGeologica Carpathica, 2018
Detrital garnets and rutiles have been recovered from basaltic pyroclastic rocks in the northern part of the Pannonian Basin and characterized using electron probe microanalysis and imaging.
Nemec Ondrej, Huraiová Monika
doaj   +1 more source

Composition and Provenance of Victoria Group Sandstones in Southern North Victoria Land, Antarctica

open access: yesNew 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

U–Pb zircon provenance of Moldanubian metasediments in the Bohemian Massif [PDF]

open access: yes, 2016
Detrital zircon U–Pb age data from the Moldanubian part of the Bohemian Massif obtained by laser ablation inductively coupled plasma mass spectrometry show variations between the lithotectonic units and point to their formation in ...
Jiří Konopásek (2842301)   +3 more
core   +1 more source

Beach Gold and Heavy Mineral Concentrates on Tiwai Spit Gravel Strand Plain, Southland, New Zealand

open access: yesNew 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

Petrography and Metamorphism of the Metasedimentary Country-Rocks of the Jacurici Valley Chromitite-Hosting Mafic-Ultramafic Complexes, Bahia, Northeastern Brazil [PDF]

open access: yesGeologia USP. Série Científica, 2001
This paper deal with on the metasedimentary country-rocks of the chromite-bearing ultramafic rocks that occur in the “Jacurici River Valley Chromium District” northeastern Bahia, Brazil.
Eliane A. Del Lama   +2 more
doaj  

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