Journal ArticleDOI
Early Archean crust in Bastar Craton, Central India—a geochemical and isotopic study
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TLDR
A12O3 trondhjemitic gneisses are found in enclaves within granites at Markampara in the Bastar Craton, Central India.About:
This article is published in Precambrian Research.The article was published on 1993-04-01. It has received 174 citations till now. The article focuses on the topics: Zircon & Craton.read more
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The Archaean tonalite-trondhjemite-granodiorite (TTG) series is not an analogue of Cenozoic adakite
TL;DR: The tonalite-trondhjemite-granodiorite (TTG) series comprises silicic and sodic rocks that form a major component of preserved Archaean crust.
Journal ArticleDOI
Progressive growth of the Earth's continental crust and depleted mantle: Geochemical constraints
TL;DR: In this paper, a three reservoir model consisting of the continental crust, depleted mantle and a more primitive mantle reservoir is used as a basis to account for both the present-day as well as the evolving isotopic compositions of the Earth's crust and mantle.
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Two terrestrial lead isotope paradoxes, forward transport modelling, core formation and the history of the continental crust
TL;DR: In this paper, a combined solution for the two major terrestrial lead paradoxes has been sought, namely, the future paradox (upper crustal and upper mantle Pb isotope compositions plot in the future field in 207pb/204Pb vs. 206Pb/ 204Pb space) and the Th/U mantle paradox (The Th /U ratio of the upper mantle is ca. 2.6, whereas Pb values indicate a value of 3.8).
Journal ArticleDOI
Crustal architecture and evolution of the Eastern Ghats Belt and adjacent regions of India
TL;DR: In this paper, the authors proposed a subdivision of the Eastern Ghats Province into four crustal provinces with widely different geological evolutions, including the Rengali and Jeypore Provinces formed at the margin of the Bhandara Craton.
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Precambrian crustal evolution of Peninsular India: A 3.0 billion year odyssey
Joseph G. Meert,Manoj K. Pandit,Vimal R. Pradhan,Jonathan Banks,Robert Sirianni,Misty M. Stroud,Brittany Newstead,Jennifer N. Gifford +7 more
TL;DR: In this paper, the authors review the major tectonic and igneous events that led to the formation of Peninsular India and provide an up-to-date geochronologic summary of the Precambrian.
References
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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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Tectonic discrimination of granitoids
Papu D. Maniar,Philip M. Piccoli +1 more
TL;DR: In this paper, the classification of granitoids is based on the major-element chemistry, and various discrimination plots are presented which sequentially discriminate the different tectonic environments.
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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.
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Least squares fitting of a straight line with correlated errors
TL;DR: In this paper, the fitting of a straight line when both variables are subject to crrors is generalized to allow for correlation of the z and y errors, illustrated by reference to lead isochron fitting.
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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.
Related Papers (5)
The thermal history of the Eastern Ghats Belt (India) as revealed by U–Pb and 40Ar/39Ar dating of metamorphic and magmatic minerals: implications for the SWEAT correlation
Klaus Mezger,Michael A. Cosca +1 more