Results 81 to 90 of about 297,722 (205)

Investigating the distribution of mercury in the transcrustal Sesia Magmatic System (Western Alps, Italy)

, 2023
The mercury (Hg) budget outgassed in the atmosphere from active volcanoes is genetically related to the underlying magmatic plumbing system. However, the source, distribution, and transport of Hg in magmas remain uncertain. Differentiation and/or crustal
Stefano Covelli, Mattia Pistone, Marco Venier, Ana Černok, Luca Ziberna, Elisa Petranich, Francesco Narduzzi, Elena Pavoni, Matteo Crosera, Sarah C. Jantzi   +9 more
core  

Precambrian Greenstone Belts of North Baffin Island, Canadian Arctic: Geochronological Constraints on Magmatism and Stratigraphy in the Rae Craton

Geochemistry, Geophysics, Geosystems
Supracrustal greenstone belts of the Rae craton of north Baffin Island have been historically attributed to the Mary River Group (MRG), a key tectonostratigraphic unit of economic significance.
B. M. Saumur, C.‐P. Folkesson, D. R. Skipton, J. H. F. L. Davies, N. Wodicka, S. T. Johnston   +5 more
doaj   +1 more source

Geological and structural markers of the eastern Borborema Province based on a geotransect covering the Paraíba, Pernambuco, Alagoas and Sergipe states, northeastern Brazil

Journal of the Geological Survey of Brazil, 2020
This study comprises a field investigation of a NE-SW geological transect along the Eastern Borborema Province in NE Brazil. The transect covered distinct geological domains that differ in a number of aspects, being bounded by shear zones.
Haroldo Monteiro Lima, Lauro Cesar Montefalco de Lira Santos, Roberto Max de Argollo, Edilton Santos   +3 more
doaj   +1 more source

Timing of Metamorphism and Deformation in the Neoarchean Quetico Metasedimentary Belt, Superior Craton, Constrained by Garnet Trace‐Element Mapping and Lu–Hf Geochronology

Journal of Metamorphic Geology, Volume 44, Issue 4, Page 265-286, May 2026.
ABSTRACT The Quetico subprovince of the Superior Province is among the largest metasedimentary belts globally and provides evidence of tectonic processes at play during the final stages of Archean cratonization. Although previous studies have shown that deformation and metamorphism of the 2.7‐Ga turbiditic protolith resulted in regional subvertical ...
Adrian G. Rehm, Antoine Godet, Doug Tinkham, Carl Guilmette, Matthijs A. Smit   +4 more
wiley   +1 more source

Gold-hosting supracrustal rocks on Storø, southern West Greenland:Lithologies and geological environment

, 2007
A gold prospect on central Storø in the Nuuk region of southern West Greenland is hosted by a sequence of intensely deformed, amphibolite facies supracrustal rocks of late Mesoto Neoarchaean age.
van Gool, Jeroen A M, Rink-Jørgensen, Matilde, Persson, Mac, Szilas, Kristoffer, Hollis, Julie A, Knudsen, Christian, Østergaard, Claus, Hollis, Julie A.   +7 more
core   +1 more source

Early (3700 Ma) Archaean rocks of the Isua supracrustal belt and adjacent gneisses

Rapport Grønlands Geologiske Undersøgelse, 1983
A coherent stratigraphy is recognised in the highly deformed, amphibolite facies early Archaean Isua supracrustal belt. The supracrustal belt consists of layered rocks (in which sedimentary structures are locally preserved), ultramafic rocks and units of garbenschiefer (a massive Mg-Al rich, leucoamphibolite).
A.P Nutman, D Bridgwater, E Dimroth, R.C.O Gill, M Rosing   +4 more
openaire   +2 more sources

Climax of Late Paleoproterozoic Rift‐Related Magmatism in the Columbia Supercontinent: Insights From a 1.77–1.76 Ga Large Igneous Province of the Dunhuang Block, Northwest China

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Widespread mafic magmatism at ca. 1.8–1.7 Ga across fragments of the Columbia supercontinent records a transition in the Earth's supercontinent cycle. The paleogeographic position of the Dunhuang Block in northwestern China within Columbia, and its role in this tectonic reorganization, remain controversial.
Masumeh Sargazi, Chuan‐Lin Zhang, Xian‐Tao Ye, Zhi‐Hao Song, Hong‐Ran Wang   +4 more
wiley   +1 more source

The Precambrian supracrustal rocks of Nunataq, north-east Disko Bugt, West Greenland

Geology of Greenland Survey Bulletin, 1999
Supracrustal rocks preserved in a major syncline in southern Nunataq comprise an Archaean and a Proterozoic sequence. An angular discordance between the two sequences is preserved locally. The basal development of the younger sequence shows similarities with that of the lower Proterozoic Mârmorilik Formation of the Uummannaq region north of Nuussuaq ...
A.K. Higgins, N.J. Soper
openaire   +1 more source

Coesite Discovery in Eclogites Confirms UHP Metamorphism in the Orlica‐Śnieżnik Dome (SW Poland)

Journal of Metamorphic Geology, Volume 44, Issue 3, Page 200-225, April 2026.
ABSTRACT Eclogite lenses are exposed within the orthogneiss‐dominated core of the Orlica‐Śnieżnik Dome in the Sudetes, which forms the northeastern margin of the Bohemian Massif (Variscan Belt of Central Europe). The presence of coesite inclusions in garnet and omphacite confirms that these eclogites underwent ultrahigh‐pressure metamorphism.
Małgorzata Nowak, Lucie Tajčmanová, Marcin Dąbrowski, Iris Buisman, Jacek Szczepański   +4 more
wiley   +1 more source

The Precambrian supracrustal rocks in the Naternaq (Lersletten) and Ikamiut areas, central West Greenland

Geology of Greenland Survey Bulletin, 2002
Naternaq, or Lersletten, in central West Greenland is an extensive Quaternary outwash plain characterised by light grey, silty sediments. Scattered low hills with outcrops of crystalline Precambrian basement rocks protrude from the outwash plain and form the northern part of the Nagssugtoqidian orogen (e.g. Connelly et al. 2000). The prominent Naternaq
Claus Østergaard, Adam A. Garde, Jeppe Nygaard, Jette Blomsterberg, Bo Møller Nielsen, Henrik Stendal, Christopher W. Thomas   +6 more
openaire   +1 more source