Results 51 to 60 of about 15,483 (211)
, 2021 We investigated the crystal and structural behavior of Cr‐bearing spinels from the Ar‐ chean chromitites of Sittampundi (India), which had been subjected to very high‐grade metamor‐ phism.
Lenaz, Davide +3 more
core +1 more source
Mafic Archean continental crust prohibited exhumation of orogenic UHP eclogite [PDF]
, 2021 The absence of ultrahigh pressure (UHP) orogenic eclogite in the geological record older than c. 0.6 Ga is problematic for evidence of subduction having begun on Earth during the Archean (4.0–2.5 Ga).
Dyck, Brendan +8 more
core +1 more source
Archean geodynamics: Ephemeral supercontinents or long-lived supercratons [PDF]
, 2021 Many Archean cratons exhibit Paleoproterozoic rifted margins, implying they were pieces of some ancestral landmass(es). The idea that such an ancient continental assembly represents an Archean supercontinent has been proposed but remains to be justified.
Sergei A. Pisarevsky (2845466) +5 more
core +2 more sources
Gravitational Potential Energy per Unit Area as a Constraint on Archean Sea Level
Geochemistry, Geophysics, Geosystems, 2018 To constrain the density structure of Archean lithosphere, I assume that gravitational potential energy (GPE) per unit area at Archean spreading centers equals that for continents whose surfaces lay near sea level.
Peter Molnar
doaj +1 more source
Re-os isotope constraints on the age of the Lithospheric mantle beneath western Greenland. [PDF]
, 2007 Alkaline magmatic activity across Western Greenland (W.G.) provides a record of lithosphere evolution over the last 600 Ma. Ultra Mafic Lamprophyre (UML) magmatism in particular has erupted an exceptional inventory of mantle xenoliths allowing a detailed
Webb, Michelle
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"Clifford's Rule" and the geodynamics of kimberlite magmatism
Геофизический журнал, 2013 The Clifford rule emphasizes the association of kimberlite magmatism with the crust areas of Archean and Early Proterozoic age. Though there are diamantiferous and highly productive primary diamond deposits outside Archean cratons, the Clifford rule is ...
O. V. Aryasova, Ya. M. Khazan
doaj +1 more source
Time constraints on the formation of lithospheric mantle beneath cratons: a re-Os isotope and platinum group element study of peridotite xenoliths from northern Canada and Lesotho, [PDF]
, 2001 Understanding the generation and evolution of cratonic lithospheric keels requires detailed knowledge of their age, timescale of formation, and the relationship between the crust and mantle part of the lithosphere.
Irvine, Gordon James
core
, 1989 The workshop considered and discussed evidence for the nature of Earth's Archaen mantle, including its composition, age and structure, influence on the origin and evolution of Earth's crust, and relationship to mantle and crustal evolution of the other ...
core
Archean Microbial Mat Communities
, 2011 Much of the Archean record of microbial communities consists of fossil mats and stromatolites. Critical physical emergent properties governing the evolution of large-scale (centimeters to meters) topographic relief on the mat landscape are (a) mat ...
Michael M. Tice +4 more
core +1 more source
Transfer functions used to interpret Archean paleosols.
, 2023 Transfer functions used to interpret Archean paleosols.
Mark D. Schmitz (2843513) +1 more
core +1 more source