Results 1 to 10 of about 5,596 (229)

Abiotic synthesis of graphitic carbons in the Eoarchean Saglek-Hebron metasedimentary rocks [PDF]

Nature Communications
Graphite in metasedimentary rocks of the Eoarchean Saglek-Hebron Gneiss Complex (Canada) is depleted in 13C and has been interpreted as one of the oldest traces of life on Earth.
Zixiao Guo, Dominic Papineau, Jonathan O’Neil, Hanika Rizo, Zhong-Qiang Chen, Xincheng Qiu, Zhenbing She   +6 more
doaj   +6 more sources

New age constraints for metasedimentary rocks in southern Finland [PDF]

Bulletin of the Geological Society of Finland, 2023
Metasedimentary rocks from nine sampling sites in southern Finland and an intermediate dyke in one of these sites were sampled for analysis of U–Pb zircon age and geochemical composition.
Paula Salminen, Matti Kurhila
doaj   +2 more sources

Slab-derived devolatilization fluids oxidized by subducted metasedimentary rocks [PDF]

Nature Geoscience, 2022
Metamorphic devolatilization of subducted slabs generates aqueous fluids that ascend into the mantle wedge, driving the partial melting that produces arc magmas.
Ague, Jay J., Fassoulas, Charalampos, Holycross, Megan E., Cottrell, Elizabeth, Tassara, Santiago, John, Timm, Li, Ji-Lei, Schwarzenbach, Esther M., Li, Jei-Li   +8 more
core   +2 more sources

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

Arabian Journal of Geosciences, 2020
The Neoproterozoic charnockite–granite association of Okpella intrudes metasedimentary and migmatite-gneiss complex rocks in the eastern Igarra Schist Belt, southwestern Nigeria.
Abimbola Chris Ogunyele, Adedibu Sunny Akingboye, Adedapo O Adeola   +2 more
exaly   +2 more sources

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

Geologia 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, Maria A. F. Candia, Gergely A. J. Szabó   +2 more
doaj   +3 more sources

Geochemical constraints on provenance and source area weathering of metasedimentary rocks from the Paleoproterozoic (~2.1 Ga) Wa-Lawra Belt, southeastern margin of the West African Craton

Geodinamica Acta, 2019
The Wa-Lawra Belt which is situated in the northern part of Ghana consists of Paleoproterozoic Birimian fine metasedimentary rocks metamorphosed to greenschist facies, particularly, in the western part.
Daniel K Asiedu, Ofori Amponsah, Prosper M Nude   +2 more
exaly   +2 more sources

Provenance of metasedimentary rocks in the northern Gawler Craton, Australia: Implications for Palaeoproterozoic reconstructions

Precambrian Research, 2006
Copyright © 2006 Elsevier B.V. All rights reserved.Isotopic, geochemical and U–Pb zircon geochronological characteristics of the Nawa Domain in the South Australian Craton, Australia, have been determined to place constraints upon Palaeoproterozoic ...
Justin L Payne, Karin M Barovich, Martin Hand   +2 more
exaly   +2 more sources

The south margin of the central Altyn is an early paleozoic tectonic unit confirmed by Zircon dating evidence [PDF]

Scientific Reports
The south margin of Central Altyn (SMCA) has long been considered as Precambrian stratigraphic unit of the Altyn Orogen. However, their strata attribution is subjected to challenge by the new finding of Siluran-Devonian metamorphic rocks.
Tuo Ma, Liang Liu, Shihao Zhang, Yongsheng Gai, Mingguo Zhai   +4 more
doaj   +2 more sources

Rheology of Metasedimentary Rocks at the Base of the Subduction Seismogenic Zone [PDF]

Geochemistry, Geophysics, Geosystems, 2022
AbstractThe Arosa Zone, Central Alps, represents a Cretaceous to Paleogene fossil subduction interface from paleodepths of 10 to >35 km. Metasedimentary schists directly below a preserved seismogenic zone exhibit viscous (foliations, folds, and lineations) and brittle (crack‐seal quartz ± calcite veins) deformation features. Si‐in‐phengite barometry
Cailey B. Condit, Melodie E. French, Justin A. Hayles, Laurence Y. Yeung, Emily J. Chin, Cin‐Ty A. Lee   +5 more
openaire   +2 more sources

Stratigraphy of the Pitangui Synclinorium, northwest of the Quadrilátero Ferrífero mineral province - Brazil: magmatism and sedimentation from Archean to Neoproterozoic

Journal of the Geological Survey of Brazil, 2023
The Pitangui Synclinorium is located in the northwestern portion of the Quadrilátero Ferrífero mineral province, São Francisco Craton, in southeast Brazil.
Marcelo de Souza Marinho, Joana Reis Magalhães, Julio Cesar Lombello, Joanna Araújo, Luiz Paulo Pedrosa Di Salvio, Rosane Nascimento Silva, Denise Canabrava Brito, Wilson Luis Feboli, Camila Franco Basto   +8 more
doaj   +1 more source