Results 91 to 100 of about 318,975 (205)

A klippe of Nagssugtoqidian supracrustal rocks at Sarfartûp nunâ, central West Greenland

Rapport Grønlands Geologiske Undersøgelse, 1979
Supracrustal rocks comprising subaqueous volcanics, basic and ultrabasic sills and clastic carbonate sediments are unconformable upon quartzo-feldspathic gneisses and together form a small klippe of imbricate thrust slices. The sills were intruded after the other rocks had been folded and metamorphosed at low amphibolite fades.
openaire   +2 more sources

Selective metasomatism of ultramafic cumulates within Archean supracrustal sequences

The Neoarchean Storø Supracrustal Belt in SW Greenland comprises a sequence of mature quartzite, metapelite, amphibolite, and ultramafic rocks that underwent amphibolite facies metamorphism during the amalgamation of the Mesoarchean Akia Terrane and the ...
Zhang, Lingyu, Zakharov, David, Szilas, Kristoffer, Basak, Sampriti   +3 more
core   +1 more source

Formation and evolution of the Archean continental crust of China: A review

China Geology, 2018
: The mainland of China is composed of the North China Craton, the South China Craton, the Tarim Craton and other young orogenic belts. Amongst the three cratons, the North China Craton has been studied most and noted for its widely-distributed Archean ...
Yu-sheng Wan, Shou-jie Liu, Hang-qiang Xie, Chun-yan Dong, Yuan Li, Wen-qian Bai, Dun-yi Liu   +6 more
doaj   +1 more source

Widespread poly-metamorphosed Archean granitoid gneisses and supracrustal enclaves of the southern Inukjuak Domain, Québec (Canada)

, 2020
International audienceThe ~12,000 km2 Inukjuak Domain in northern 79 Québec is part of the Archean Minto Block in the northwestern Superior Province of Canada. Eoarchean (ca.
Bleeker, Wouter, Cates, Nicole, L, Tropper, Peter, Kelly, Nigel M., Mojzsis, Stephen J., Greer, Jennika, Caro, Guillaume, Mojzsis, Stephen, J, Cates, Nicole L., Kelly, Nigel, M   +9 more
core   +1 more source

Multiple generations of granitoid gneisses hosting supracrustal belts in the Archean Inukjuak domain (Quebec, Canada) [PDF]

, 2013
The Inukjuak domain in the northwestern Superior Province of Canada hosts numerous supracrustal belts that occur as km-scale enclaves in Archean granitoid gneisses. The Eoarchean (ca.
Greer, Jennika
core   +3 more sources

3.7 billion year old detrital sediments in Greenland are consistent with active plate tectonics in the Eoarchean

Communications Earth & Environment
Plate tectonic processes modulate element cycling, crust generation, and differentiation, yet at what point in Earth’s history these processes emerged remains debated.
Austin Jarl Boyd, Minik T. Rosing, Magnus A. R. Harding, Donald E. Canfield, Tue Hassenkam   +4 more
doaj   +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

Tourmaline in Precambrian supracrustal rocks from Aasiaat, central West Greenland

Rapport Grønlands Geologiske Undersøgelse, 1988
Close to the town Aasiaat/Egedesminde supracrustal rocks outcrop on some small islands situated around the position 68°46'N and 52°38'W. The largest of these islands, Isuamiut, is barely a few kilometres long and the islands are situated more than 10 km from the mainland.
openaire   +2 more sources

Some border relations between supracrustal and infracrustal rocks in South-West Greenland

Rapport Grønlands Geologiske Undersøgelse, 1966
Three types of border relation between supracrustal and intracrustal rocks are described from South-West Greenland. In the Ravns Storø area a largely volcanic series, possibly equivalent in age to the Tartoq Group, passes downwards into the underlying gneisses via a transitional migmatite front.
B.F Windley, N Henriksen, A.K Higgins, E Bondesen, S.B Jensen   +4 more
openaire   +2 more sources

New approaches to lithological and stratigraphic research and mapping of the early Precambrian complexes (using an example of the Paleoproterozoic and Archean structures of Keivy, Kola Peninsula)

Vestnik MGTU
Previously, the team of authors proposed a new method for the comparative analysis of geological objects. Its foundation is an assessment of the proximity of statistically significant petrogeochemical characteristics.
Kozlov N. E., Mudruk S. V., Sorokhtin N. O.   +2 more
doaj   +1 more source