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No evidence for Hadean continental crust within Earth’s oldest evolved rock unit
Due to the acute scarcity of very ancient rocks, the composition of Earth’s embryonic crust during the Hadean eon (>4.0 billion years ago) is a...
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Global hydrogen reservoirs in basement and basins
BackgroundHydrogen is known to occur in the groundwaters of some ancient cratons. Where associated gases have been dated, their age extends up to a...
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Mantle geochemistry: Insights from ocean island basalts
The geochemical study of the Earth’s mantle provides important constraints on our understanding of the formation and evolution of Earth, its internal...
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Zircon Trace Element Constraints on the Evolution of the Paleoproterozoic Birimian Granitoids of the West African Craton (Ghana)
The Paleoproterozoic Birimian granitoids of the West African Craton (WAC) in the northwestern part of Ghana, have been studied for their zircon trace...
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Formation of Hadean granites by melting of igneous crust
The oldest known samples of Earth, with ages of up to 4.4 Gyr, are detrital zircon grains in meta-sedimentary rocks of the Jack Hills in Australia....
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Two types of Archaean supracrustal belts in the Bundelkhand craton, India: Geology, geochemistry, age and implication for craton crustal evolution
Two Archaean supracrustal complexes are documented in the Bundelkhand craton viz. 1) the Central Bundelkhand greenstone complex (formed the Babina...
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Highly siderophile element abundances in Eoarchean komatiite and basalt protoliths
Plume-derived, Mg-rich, volcanic rocks (komatiites, high-Mg basalts, and their metamorphic equivalents) can record secular changes in the highly...
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First findings of Paleo- and Mesoarchean zircons in the rocks from the Central Arctic province of oceanic rises as an evidence of the ancient continental crust
This report presents the results of local U–Pb zircon dating (SIMS SHRIMP II) for a sample of migmatite gneiss dredged on the western slope of Alpha...
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Composition and genesis of the oldest (4.28 Ga) sediments on Earth
Abstract—The primary premetamorphic mineral composition of the 4.28 Ga old cummingtonite amphibolites of basalt–andesite composition found in the...
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Genesis and age of zircon from alkali and mafic rocks of the Elet’ozero Complex, North Karelia
The paper presents a study of zircon from the Middle Paleoproterozoic Elet’ozero high-Ti layered ultramafic-mafic-alkaline intrusive complex with...
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Earth’s earliest evolved crust generated in an Iceland-like setting
It is unclear how the earliest continental crust formed on an Earth that was probably originally surfaced with oceanic crust. Continental crust may...
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