Results 31 to 40 of about 299,133 (214)

Petrography and geochemistry of Neoproterozoic charnockite-granite association and metasedimentary rocks around Okpella, southwestern Nigeria [PDF]

, 2020
The Neoproterozoic charnockite–granite association of Okpella intrudes metasedimentary and migmatite-gneiss complex rocks in the eastern Igarra Schist Belt, southwestern Nigeria.
Babalola, Ayotunde Oluwadamilare, Olufunmilayo, Abiodun Tobiloba, Akingboye, Adedibu Sunny, Adeola, Adedapo Oluwasanu, Ogunyele, Abimbola Chris, Obaje, Solomon Omale   +5 more
core   +1 more source

Spatial Relations between Geological Structures and Precious and Base Metal Deposits from Magnetic Investigation of the Pangar-Djérem Zone, Cameroon

International Journal of Geophysics, 2023
The version three of Earth Magnetic Anomaly Grid (EMAG2-v3) used in this work is aimed at establishing the spatial relationships between tectonic structures and gold and associated mineralization in the Pangar-Djérem area, central and southern Cameroon ...
Constantin Mathieu Som Mbang, Marcelin Pemi Mouzong, Li Zhen Cheng, Jocelyne Laure Megne Tafone, Charles Antoine Basseka, Joseph Kamguia, Jacques Etamè   +6 more
doaj   +1 more source

Geology of giant quartz veins and their host rocks from the Eastern Pyrenees (Southwest Europe)

Journal of Maps, 2023
Giant Quartz Veins (GQVs) are ubiquitous in different tectonic settings and, besides being often related to hydrothermal ore deposits, also represent large-scale fingerprints of the structural and geochemical history of the rocks in which they are hosted.
Eloi González-Esvertit, Àngels Canals, Paul D. Bons, Henrique Murta, Josep Maria Casas, Enrique Gomez-Rivas   +5 more
doaj   +1 more source

A reactive assimilation model for regional-scale cordierite-bearing granitoids: geochemical evidence from the Late Variscan granites of the Central Iberian Zone, Spain [PDF]

, 2008
Regional scale biotite and cordierite-bearing granites (s.l.) in the Variscan of the Central Iberian Zone (CIZ) are spatially closely associated with cordierite-rich nebulites and cordierite-bearing two-mica granites, and with cordierite-rich high grade ...
Ellam, R.M., Ugidos, J. M., Stephens, W. E., Carnicero, A., Stephens, W.E., Ellam, R. M., Ugidos, J.M.   +6 more
core   +1 more source

The orosirian-statherian sequence and transpressive geometry in Santa Maria de Itabira, Minas Gerais [PDF]

Geologia USP. Série Científica, 2014
The metasedimentary rocks cropping out in the surroundings of the township of Santa Maria de Itabira (MG), comprise Orosirian quartzites herein informally named Pedra Branca Quartzite and the Statherian banded iron formation bearing sequences at the ...
Ricardo Pagung de Carvalho, Carlos Alberto Rosière, Vassily Khoury Rolim, Cristiano de Carvalho Lana, João Orestes Schneider Santos   +4 more
doaj   +1 more source

The Malene metasedimentary rocks on Rypeø, and their relationship to Amîtsoq gneisses

Rapport Grønlands Geologiske Undersøgelse, 1983
Two groups of Malene metasedimentary rocks on Rypeø, a small island south of Godthåb, have been studied in detail in order to evaluate their origin and relationship to older, adjacent Amîtsoq gneiss. Field observation shows that the metasediments range from massive to finely layered, and include an unusual pod-rock ('pseudoconglomerate'), which ...
R.F Dymek, R Weed, L.P Gromet
openaire   +2 more sources

The Mesoproterozoic sub-Heddersvatnet unconformity, Telemark, South Norway [PDF]

Bulletin of the Geological Society of Finland, 2005
The 1.51 Ga Rjukan group,Telemark, S Norway, is divided into felsic volcanic rocks of the Tuddal formation and mafic rocks of the Vemork formation. It is overlain by the sedimentary rocks of the Vindeggen group (1.50-1.17 Ga), starting with the arkosic ...
K. Laajoki
doaj   +1 more source

The Paleoproterozoic metaconglomerate-hosted Castelo de Sonhos gold deposit, Tapajós Gold Province, Amazonian Craton: a modified paleoplacer origin

Journal of the Geological Survey of Brazil, 2018
The Castelo de Sonhos gold deposit (~1.5 Moz Au) is located in the southeastern Tapajós Gold Province and is hosted in variably deformed metaconglomerates and metasandstones of the Castelo dos Sonhos Formation, which was deposited between 2011 and 2050 ...
Joana Queiroz, Evandro Klein
doaj   +1 more source

Metasedimentary Metatexites with Trondhjemitic Leucosomes from NE Sicily: Another Example of Prograde Water-fluxed Melting in Collisional Belts

Geosciences, 2020
Trondhjemitic leucosomes, hosted in late Variscan metasedimentary migmatites from the upper amphibolite-facies basement of the north-eastern Peloritani Mountains (southern Italy), have petrographic and geochemical features consistent with their origin as
Patrizia Fiannacca, Rosolino Cirrincione
doaj   +1 more source

Petrography and geochemistry of the Pedra Dourada Granulite, southeastern Minas Gerais, Brazil

REM: International Engineering Journal
The Pedra Dourada Granulite (PDG) occurs at the southeastern portion of the Araçuaí Belt, north of the town of Ponte Nova. It comprises bodies up to 45 km2 inserted into amphibolite-facies gneisses of the Mantiqueira Complex. Motivated by the discrepancy
Kassia de Souza Medeiros Marinho, Hanna Jordt-Evangelista, Marcelo de Souza Marinho   +2 more
doaj   +1 more source