Results 21 to 30 of about 5,043 (208)

Geology of the Saint-Marcel valley metaophiolites (Northwestern Alps, Italy)

Journal of Maps, 2017
The geological map of the Saint-Marcel valley at the scale of 1:20,000 illustrates the tectonic setting of metaophiolites from the southern Aosta Valley, in the Italian side of the Western Alpine belt.
Paola Tartarotti, Silvana Martin, Bruno Monopoli, Luca Benciolini, Alessio Schiavo, Riccardo Campana, Irene Vigni   +6 more
doaj   +1 more source

The evolution of the Sesia Zone (Western Alps) from Carboniferous to Cretaceous: insights from zircon and allanite geochronology

Swiss Journal of Geosciences, 2020
Microscale dating of distinct domains in minerals that contain relics of multiple metamorphic events is a key tool to characterize the polyphase evolution of complex metamorphic terranes. Zircon and allanite from five metasediments and five metaintrusive
Alice Vho, Daniela Rubatto, Pierre Lanari, Daniele Regis   +3 more
doaj   +1 more source

Metamorphism and migmatization of metasediments in the Precambrian English River subprovince, western Ontario [PDF]

, 1985
Metasediments of the Precambrian English River subprovince, a subdivision of the Superior province, are conspicuously migmatized by \u27bands of light-colored, igneous-appearing material.
Baumann, Rodney M.
core   +1 more source

Discovery of Mega‐Sheath Folds Flooring the Liwan Subbasin (South China Sea): Implications for the Rheology of Hyperextended Crust

Geochemistry, Geophysics, Geosystems, 2020
Sheath folds recognized on kilometer scale are rare and only described in salt tectonics in seismic data. Here, we present mega‐sheath folds spectacularly imaged in a 3‐D seismic survey in the seismic basement flooring the hyperextended Liwan subbasin in
C. Zhang, G. Manatschal, X. Pang, Z. Sun, J. Zheng, H. Li, L. Sun, J. Zhang, Y. Zhao   +8 more
doaj   +1 more source

Metamorphic evolution of Verrucano metasediments in northern Apennines: new petrological constraints

European Journal of Mineralogy, 1998
14 páginas, 9 figuras, 3 ...
GIORGETTI, G., GOFFE', B., TURBANTI, I., NIETO F.   +3 more
openaire   +3 more sources

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

Oxygen and nitrogen isotopes as tracers of fluid activities in serpentinites and metasediments during subduction

, 2007
N and O isotope systematics of a suite of high-pressure (HP) and ultrahigh-pressure (UHP) metasediments of the Schistes Lustrés nappe and metaperidotites of the Erro Tobbio Massif from the Alpine-Appennine system are compared with their unmetamorphosed ...
P. CARTIGNY, P. PHILIPPOT, V. BUSIGNY, SCAMBELLURI, MARCO   +3 more
core   +5 more sources

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

Geochemistry and Petrology of Metasediments Associated with Gold Mineralization in Imonga Area, Eastern DR Congo [PDF]

, 2023
The Imonga sector is located in the Eastern of DR Congo, precisely within the Maniema province located in the Central African Karagwe Ankole belt, which forms together with the Kibara belt a Mesoproterozoic geological structure.
Mulumba, Raha, Akuzwe, Daniel, Mukingi B., Elia, Germain, Bishikwabo K., Parfait, Mupenge M., Lunkomo, Sicke   +5 more
core   +1 more source

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