Results 41 to 50 of about 23,492 (308)

Metasomatic Replacement of Albite in Nature and Experiments [PDF]

Minerals, 2018
Replacement of albite by sodium-rich, secondary phases is a common phenomenon, observed in different geological settings and commonly attributed to alkaline metasomatism. We investigated growth of nepheline and sodalite on albite in time series experiments between two and 14 days.
Drüppel, Kirsten, Wirth, Richard
openaire   +6 more sources

Complex examination of the Upper Paleozoic siliciclastic rocks from southern Transdanubia, SW Hungary—Mineralogical, petrographic, and geochemical study [PDF]

, 2007
A vertical section of Upper Paleozoic sandstones from southern Transdanubia (Mecsek-Villány area, Tisza mega-unit, Hungary) has been analyzed for major and trace elements, including rare earth elements (REEs).
Á, Arribas, Awdankiewicz, Balogh, Bauluz, Bhatia, Bhatia, Biscaye, Brü, Cox, Csontos, Csontos, Csontos, Cullers, Cullers, Fazekas, Fedo, Gaillardet, Garver, Golonka, Haas, Huang, Kü, Lee, Nagy, Nesbitt, Noda, Pearce, Preston, Varga, Varga, Varga, Varga, Watanabe, Willan, Zimmermann   +35 more
core   +1 more source

Metasomatism and Slow Slip: Talc Production Along the Flat Subduction Plate Interface Beneath Mexico (Guerrero)

Geochemistry, Geophysics, Geosystems, 2023
Talc‐rich rocks are common in exhumed subduction zone terranes and may explain geophysical observations of the subduction zone interface, particularly beneath Guerrero, Mexico, where the Cocos plate subducts horizontally beneath North America and ...
P. C. Lindquist, C. B. Condit, W. F. Hoover, D. Hernández‐Uribe, V. E. Guevara   +4 more
doaj   +1 more source

Carboniferous and Permian magmatism in Scotland [PDF]

, 2004
Extensional tectonics to the north of the Variscan Front during the Early Carboniferous generated fault-controlled basins across the British Isles, with accompanying basaltic magmatism.
Fitton, J.G., Smedley, Pauline, Stephenson, David, Upton, B.G.J., Wallis, S.M.   +4 more
core   +1 more source

Field‐Based Evidence for Intra‐Slab High‐Permeability Channel Formation at Eclogite‐Facies Conditions During Subduction

Geochemistry, Geophysics, Geosystems, 2021
Fluid release from subducting oceanic lithosphere is a key process for subduction zone geodynamics, from controlling arc volcanism to seismicity and tectonic exhumation.
Francesca Piccoli, Jay J. Ague, Xu Chu, Meng Tian, Alberto Vitale Brovarone   +4 more
doaj   +1 more source

Phlogopite-Forming Reactions as Indicators of Metasomatism in the Lithospheric Mantle

Minerals, 2019
Phlogopite is widely accepted as a major mineral indicator of the modal metasomatism in the upper mantle within a very wide P–T range. The paper reviews data on various phlogopite-forming reactions in upper-mantle peridotites.
O. Safonov, V. Butvina, E. Limanov
semanticscholar   +1 more source

Sr-Nd Systematics and REE distribution in the type magnesite deposits in Lower Riphean of South Urals province

Литосфера, 2016
The geochemistry and REE of magnesite and host carbonate rocks of two Lower Riphean deposits of the South Urals province (Satka and Ismakaevo ore fields) confirm the metasomatic nature of the magnesite.
M. T. Krupenin, A. B. Kuznetsov, G. V. Konstantinova   +2 more
doaj   +2 more sources

Paleocene‐Eocene High‐Pressure Carbonation of Western Alps Serpentinites: Positive Feedback Between Deformation and CO2‐CH4 Fluid Ingression Responsible for Slab Slicing?

Geochemistry, Geophysics, Geosystems, 2023
Meter‐ to hectometer‐size horizons of carbonate‐bearing talcschists are found along or near the contacts between the different Liguro‐Piemont subduction slices.
Clément Herviou, Guillaume Bonnet
doaj   +1 more source

Boninite and Harzburgite from Leg 125 (Bonin-Mariana Forearc): A Case Study of Magma Genesis during the Initial Stages of Subduction [PDF]

, 1992
Holes drilled into the volcanic and ultrabasic basement of the Izu-Ogasawara and Mariana forearc terranes during Leg 125 provide data on some of the earliest lithosphere created after the start of Eocene subduction in the Western Pacific.
Arculus, Richard J., Ishii, Teruaki, Murton, Bramley J., Parkinson, Ian J., Pearce, Julian A., Peate, David W., van der Laan, Sieger R.   +6 more
core   +1 more source

Study of Garnets in Hellenistic–Roman Jewellery From the Collections of the Archaeological Museum of Thessaloniki, Greece

Journal of Raman Spectroscopy, EarlyView.
This study presents the gemological analysis of 25 garnets from Hellenistic and Roman jewellery in the Archaeological Museum of Thessaloniki using mobile Raman spectroscopy and micro‐EDXRF. The garnets are classified into three geochemical clusters, with notable differences in distribution between Thessaloniki and Pydna, suggesting distinct trading ...
Maria Nikopoulou, Stefanos Karampelas, Evangelia Tsangaraki, Lambrini Papadopoulou, Christos Katsifas, Ioannis Nazlis, Annareta Touloumtzidou, Vasilios Melfos, Nikolaos Kantiranis   +8 more
wiley   +1 more source