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The common occurrence of shear zones may be explained by the greater density
of the 'greenstones' relative to the surrounding gneisses, which permitted the
supracrustal assemblage to collapse through the hot, weak, Archean basement.
2
Geology and Mineral Resources of West Africa
Plate tectonic models have been proposed for Lower Proterozoic terranes in
other parts of the world, such as the Canadian shield, where basement-
supracrustal-granite associations can also be identified. The Lower Proterozoic
of West Africa ...
3
Geological Survey of Canada, Open File 2351
Foliated Granitic Gneiss Domain 1 is not a single contiguous area, but refers here
to the group of variously shaped areas characterized by the presence of
supracrustal gneisses. Domain 2 refers to one main belt dominated by sheets of
granite ...
Jefferson, C W, Smith, J E M, Hamilton, S M
4
Ancient Earth, Ancient Skies: The Age of Earth and Its ...
The importance of the Isua locality is that a thick and relatively undisturbed
sequence of very ancient supracrustal rocks is exposed there. These remarkable
rocks form an incomplete oval belt approximately 12 x 25 km, completely
enclosed by ...
5
The Geologic Time Scale 2012 2-Volume Set
Recent studies have demonstrated that the Isua supracrustal belt and
surrounding granitic terrain is composed of two tectonically juxtaposed crustal
slices, including c. 3810e3800 Ma supracrustal rocks and contemporaneous
tonalities, and c.
F. M. Gradstein, Gabi Ogg, Mark Schmitz, 2012
6
Encyclopedia of Astrobiology
Definition. The Isua supracrustal belt is the largest contiguous complex of
Eoarchean supracrust (rocks formed at or near the Earth's surface) known on
Earth. It is located ca 150 km NE of Greenland's capital Nuuk, in West Greenland.
Muriel Gargaud, Ricardo Amils, Henderson James Cleaves, 2011
7
Geological Survey of Canada, Open File 2659
(1991) (Disrupted Supracrustal Rocks) is here renamed and divided into two sub-
domains. Domain 1A comprises relatively well preserved Archean supracrustal
rocks that form coherent, contiguous belts, such as Prince Albert Group, ...
Jefferson, C W, Chandler, F W, Hulbert, L J
8
Precambrian Continental Crust and its Economic Resources
MINERAL OCCURRENCES IN THE 3.6 Ga OLD ISUA SUPRACRUSTAL BELT,
WEST GREENLAND PETER W.UITTERDIJK APPEL ABSTRACT In the early
Archaean Isua supracrustal belt, West Greenland, a banded iron-formation is
closely ...
9
Geological Survey of Canada, Current Research (Online) no. ...
Deyell, C, Sherlock, R L. Purchase Information pour acheter Titles Titres Article
Article Inuk occurrence The Inuk prospect is located about 30 km inland from
Committee Bay, and is hosted in an isolated raft of supracrustal ...
10
Precambrian Geology of Finland
overlain by Paleoproterozoic supracrustal sequences (Figure 2.5). Svecofennian
granitoids with evolved Nd isotope characteristics (Figure 2.5) also indicate
thermal reworking of deeply buried Archean crust farther to the southwest (
Huhma, ...
Martti Lehtinen, Pekka A. Nurmi, O.T. Ramo, 2005
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Life's history in iron
BIF from the Nuvvuagittuq Supracrustal Belt in Quebec, Canada. This belt contains the oldest supracrustals (sedimentary and volcanic rocks) thus far reported. «Phys.Org, 十一月 14»
Primera Bioscience Announces Acquisition of Copenhagen …
Storo is hosted by metavolcanic and metasedimentary rocks of the Storo supracrustal belt, bounded to the west by the NNE-striking, 300-400m wide, Storo shear ... «Marketwired, 五月 14»
JDV Capital Corp. Announces Qualifying Transaction
The area consists of predominantly granitic to granodioritic intrusions, high-grade gneisses and migmatites, along with primarily sedimentary supracrustal rocks ... «MarketWatch, 三月 14»
Wah, Umur Bumi Sudah Mencapai 4,54 Miliar Tahun
Batuan yang lebih tua dari 3,5 miliar tahun bisa ditemukan di semua benua seperti Batuan Isua Supracrustal di Greenland berumur 3,7-3,8 miliar tahun, batuan ... «Okezone, 三月 14»
Subduction channel processes: New progress in plate tectonic theory
... deeply subducted continental crust gives rise to granitic rocks whereas partial melting of the subducting supracrustal rocks produces felsic melt that reacts with ... «EurekAlert, 九月 13»
GoldOn Provides Exploration Update on its Swayze Gold Project …
... occupy the northern approximately two thirds of the grid and Archean supracrustal rocks of the Swayze Greenstone Belt which underlie the southern third. «MarketWatch, 九月 13»
First life may have arisen above serpentine rock, say Stanford …
An outcrop of serpentinite from the Isua Supracrustal sequence of West Greenland, at the western margin of the Greenland Icecap. Under the West Greenland ... «Stanford Report, 九月 11»
ELGIN MINING ACQUIRES LUPIN GOLD MINE AND ULU GOLD …
The supracrustal rocks consist of a sequence of basalts, graywackes, and gabbroic sills, all folded into a 5‐km‐long anticlinal structure. Late‐stage feldspar ... «CNW Group, 七月 11»
New Evidence Challenges Oldest Signs of Life
The samples come from the Nuvvuagittuq Supracrustal Belt, a sedimentary banded iron formation located in the Archean Superior craton, one of the earth's ... «Astrobiology Magazine, 五月 11»
72. Crust Formed Early In Earth's History
Earth scientists have been crawling over the intensely baked and contorted rocks of the 3.8-billion-year-old Isua Supracrustal Belt for decades. But when Harald ... «Discover Magazine, 一月 08»
