Results 31 to 40 of about 3,576 (220)

Rare-earth elements in Precambrian iron formations in Väyrylänkylä, South Puolanka area, Finland [PDF]

Bulletin of the Geological Society of Finland, 1975
Partial rare-earth element (REE) and ore analyses of 19 samples of oxide-, carbonate-, silicate-, and sulphide-facies rocks from the Superior-type Precambrian (Karelian) iron formations and associated rocks (pelitic metasediments, dolomite, basic tuffite
K. Laajoki
doaj   +1 more source

Physico-chemical control on the REE-mineralogy in chloritoid-grade metasediments from a single outcrop (Central Alps, Switzerland)

, 2011
International audienceThis study assesses the effects of fluid, whole-rock composition and oxygen fugacity, on the texture and composition of monazite, allanite, and xenotime. For this purpose, these were investigated in 13 mono-metamorphic metasediments
Engi, M, Janots, Emilie, Berger, Alfons, M. Engi, A. Berger, Engi, Martin, Janots, E., Berger, A., Engi, M., E. Janots   +9 more
core   +1 more source

Schistes Lustrés in a hyper-extended continental margin setting and reinterpretation of the limit between the Mont Fort and Tsaté nappes (Middle and Upper Penninics, Western Swiss Alps)

Swiss Journal of Geosciences, 2023
The Schistes Lustrés form a large and complex unit at the top of the Penninic nappe stack of the Alpine belt. Calcschists, partly of Late Cretaceous age, constitute the dominant lithology.
Adrien Pantet, Jean-Luc Epard, Henri Masson, Claudia Baumgartner-Mora, Peter Oliver Baumgartner, Lukas Baumgartner   +5 more
doaj   +1 more source

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

Frontiers 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, Lei Yang, Lei Yang, Jia-Min Wang, Xiao-Chi Liu, Gautam P. Khanal, Gautam P. Khanal, Fu-Yuan Wu, Fu-Yuan Wu   +8 more
doaj   +1 more source

Poorly crystalline carbonaceous matter in high grade metasediments: implications for graphitisation and metamorphic fluid compositions

, 1994
Poorly crystalline carbonaceous matter was observed in chlorite to sillimanite grade metasediments from the Trois Seigneurs Massif, in contrast to other studies of carbon crystallinity which observed well crystallised graphite under upper greenschist ...
Large, DJ, Christy, AG, Fallick, AE
core   +1 more source

Evidence from HP/UHP metasediments for recycling of isotopically heterogeneous potassium into the mantle

, 2022
International audienceAbstract Potassium isotopes may provide a novel approach for fingerprinting recycled sediments in the mantle due to the significant differences in K abundance and isotopic ratio between subducting sediment and the mantle.
Wang, Ze-Zhou, Teng, Fang-Zhen, Busigny, Vincent, Liu, Sheng-Ao   +3 more
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

Geochemistry, 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

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

Geologica 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

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

, 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  

Supplementary material for "Lithostratigraphy of Paleozoic metasediments in southern Fiordland, New Zealand"

, 2022
Supplementary material to accompany Jongens R, Turnbull IM, Allibone AH, Lithostratigraphy of Paleozoic metasediments in Southern Fiordland, New Zealand, published in the New Zealand Journal of Geology and Geophysics (https://doi.org/10.1080/00288306 ...
Richard Jongens (14055084), Ian Turnbull (14205781), Andrew Allibone (14206184)   +2 more
core   +1 more source