Journal ArticleDOI
A New Understanding of the Provinces of the Amazon Craton Based on Integration of Field Mapping and U-Pb and Sm-Nd Geochronology
João Orestes Schneider Santos,Léo Afraneo Hartmann,Henri E. Gaudette,David I. Groves,Neal J. McNaughton,Ian R. Fletcher +5 more
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TLDR
The interpretation of U-Pb and Sm-Nd isotopic data has led to a new understanding of the subdivision and evolution of the Amazon Craton during Precambrian time, with major improvements and changes made to the previous Rb-Sr based model.About:
This article is published in Gondwana Research.The article was published on 2000-10-01. It has received 412 citations till now. The article focuses on the topics: Craton & Terrane.read more
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The lithospheric architecture of Africa: Seismic tomography, mantle petrology, and tectonic evolution
Graham Begg,William L. Griffin,L. M. Natapov,Suzanne Y. O'Reilly,Stephen P. Grand,Craig O'Neill,Jon Hronsky,Y Poudjom Djomani,Christopher J. Swain,T. Deen,Peter Bowden +10 more
TL;DR: In this paper, the authors present a new analysis of the lithospheric architecture of Africa, and its evolution from ca. 3.6 Ga to the present, using thermal/compositional modeling and xenolith/xenocryst data from volcanic rocks.
Journal ArticleDOI
A full-plate global reconstruction of the Neoproterozoic
Andrew Merdith,Andrew Merdith,Alan S. Collins,Simon Williams,Sergei Pisarevsky,John Foden,Donnelly B. Archibald,Donnelly B. Archibald,Morgan L. Blades,Brandon L. Alessio,Sheree Armistead,Diana Plavsa,Chris D. Clark,R. Dietmar Müller +13 more
TL;DR: In this article, a full-plate, topological model of the Neoproterozoic that maps the evolution of the tectonic plate configurations during this time is presented.
Journal ArticleDOI
West African provenance for Saxo-Thuringia (Bohemian Massif): Did Armorica ever leave pre-Pangean Gondwana? – U/Pb-SHRIMP zircon evidence and the Nd-isotopic record
Ulf Linnemann,Neal J. McNaughton,Rolf L. Romer,Michael Gehmlich,Kerstin Drost,Christian Tonk +5 more
TL;DR: In this paper, SHRIMP U/Pb geochronology on detrital and inherited zircon grains from pre-Variscan basement rocks of the northern part of the Bohemian Massif (Saxo-Thuringia, Germany) demonstrates a distinct West African provenance for sediments and magmatic rocks in this part of peri-Gondwana.
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The palaeomagnetically viable, long-lived and all-inclusive Rodinia supercontinent reconstruction
TL;DR: The Rodinia model presented in this paper is a marked departure from standard models, which have accommodated recent discordant palaeomagnetic data either by excluding cratons from Rodinia altogether, or by decreasing duration of the supercontinental assembly.
References
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Journal ArticleDOI
Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology
R.H. Steiger,E. Jäger +1 more
TL;DR: The IUGS Subcommission on Geochronology (FOOTNOTE 4) as discussed by the authors recommended the adoption of a standard set of decay constants and isotopic abundances in isotope geology.
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Approximation of terrestrial lead isotope evolution by a two-stage model
J.S. Stacey,Jan Kramers +1 more
TL;DR: In this paper, a two-stage model for terrestrial lead isotope evolution is proposed, which permits the age of the earth to be that of the meteorite system and also yields good model ages for samples of all ages.
Journal ArticleDOI
A low-contamination method for hydrothermal decomposition of zircon and extraction of U and Pb for isotopic age determinations
TL;DR: In this paper, Krogh et al. developed a simple procedure for the decomposition of zircon and the extraction of U and Pb for isotopic age determinations.
Journal ArticleDOI
Improved accuracy of U-Pb zircon ages by the creation of more concordant systems using an air abrasion technique
TL;DR: Abrasion combined with an improved paramagnetic separation technique eliminates 90 to 100 percent of discordance so that ages of unprecedented accuracy (± 1 to 3 my) can be achieved for virtually all 2700 my old zircon populations from plutonic or volcanic rocks as mentioned in this paper.
Journal ArticleDOI
Precise determination of SmNd ratios, Sm and Nd isotopic abundances in standard solutions☆
TL;DR: In this article, the methods used for precise calibrations of Sm/Nd ratios and the average isotopic abundances obtained for normal Sm and Nd are given, and a mixed Sm-Nd normal solution with a precisely known Sm/nd ratio close to the nominal average chondritic value is described and the calibration discussed.
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