Archean crust-mantle geodynamic regimes: A review
Geosystems and Geoenvironment, 2022 The crust-mantle dynamic system of the formation and evolution of the early Earth crust is a frontier field in current Earth Science. This paper mainly introduces the popular dynamic models, comprising the stagnant-lid, mantle plume, sagduction, dripping,
Shuwen Liu +7 more
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Rare-earth elements in the Archean iron formation and associated schists in Ukkolanvaara, Ilomantsi, SE Finland [PDF]
Bulletin of the Geological Society of Finland, 1977 This study describes the La, Ce, Nd, Sm, Eu, Tb, Yb and Lu concentrations in six iron-formation rocks (Fetot >> 15 %), four ferriferous schists (Fetot ~ 10—15 %) and two schist interbeds of the Archean Ukkolanvaara iron formation, as well as in seven ...
K. Laajoki, S. Lavikainen
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The faint young Sun problem [PDF]
, 2012 For more than four decades, scientists have been trying to find an answer to one of the most fundamental questions in paleoclimatology, the `faint young Sun problem'.
Abbot +270 more
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Building Archean cratonic roots
Frontiers in Earth Science, 2022 Geophysical, geochemical, and geological investigations have attributed the stable behaviour of Earth's continents to the presence of their Archean cratonic roots. These roots are likely composed of melt-depleted, low density residual peridotite with high Magnesium number (Mg#), while devolatilisation from the upper mantle during magmatic events might ...
Charitra Jain +6 more
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The Sedimentary Origin of Black and White Banded Cherts of the Buck Reef, Barberton, South Africa
Geosciences, 2019 The Buck Reef is a 250−400 m thick sequence of banded black and white (B&W) cherts deposited ca. 3416 Ma ago in a shallow basin. We provide field, petrological and geochemical constraints on the chert-forming process and the origin of the ...
Morgane Ledevin +4 more
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A Closer Earth and the Faint Young Sun Paradox: Modification of the Laws of Gravitation, or Sun/Earth Mass Losses? [PDF]
, 2013 Given a solar luminosity L_Ar = 0.75 L_0 at the beginning of the Archean 3.8 Gyr ago, where L_0 is the present-day one, if the heliocentric distance r of the Earth was r_Ar = 0.956 r_0, the solar irradiance would have been as large as I_Ar = 0.82 I_0. It
Iorio, Lorenzo
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Geophysical Monograph Series, Page 137-165., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Konstantin Litasov +3 more
wiley +3 more sources
Archean continental crust formed by magma hybridization and voluminous partial melting
Scientific Reports, 2021 Archean (4.0–2.5 Ga) tonalite–trondhjemite–granodiorite (TTG) terranes represent fragments of Earth’s first continents that formed via high-grade metamorphism and partial melting of hydrated basaltic crust. While a range of geodynamic regimes can explain
Juan David Hernández-Montenegro +3 more
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A secular increase in continental crust nitrogen during the Precambrian [PDF]
, 2017 Recent work indicates the presence of substantial geologic nitrogen reservoirs in the mantle and continental crust. Importantly, this geologic nitrogen has exchanged between the atmosphere and the solid Earth over time. Changes in atmospheric nitrogen (i.
Goldblatt, Colin, Johnson, Benjamin W
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Seismic wide-angle study of accreted Proterozoic crust in southeastern Wyoming [PDF]
, 1994 A seismic wide-angle xperiment was conducted in southeastern Wyoming, USA to investigate the seismic character of a postulated Proterozoic magmatic arc south of the suture (Cheyenne Belt) to the Archean Wyoming Province.
Gohl, Karsten, Smithson, S. B.
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