Journal ArticleDOI
Stabilization of the Aravalli Craton of northwestern India at 2.5 Ga: An ion microprobe zircon study
TLDR
In this article, an ion microprobe was used to measure the ages of zircons from six samples collected from the southern Aravalli Mountains, and the results indicated that the southern segment of the Aravali Craton had broadly stabilized by ∼ 2.5 Ga.About:
This article is published in Chemical Geology.The article was published on 1996-07-29. It has received 191 citations till now. The article focuses on the topics: Gneiss & Protolith.read more
Citations
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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.
Journal ArticleDOI
1891–1883 Ma Southern Bastar–Cuddapah mafic igneous events, India: A newly recognized large igneous province
TL;DR: A newly recognized remnant of a Paleoproterozoic Large Igneous Province has been identified in the southern Bastar craton and nearby Cuddapah basin from the adjacent Dharwar craton, India as mentioned in this paper.
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Ion microprobe 207Pb/206Pb ages of zircons from the Bundelkhand massif, northern India: implications for crustal evolution of the Bundelkhand–Aravalli protocontinent
TL;DR: In this article, the ages of zircon from gneissic rocks and granitoids representing all major lithological units of the Bundelkhand massif, northern India, have been determined using an ion microprobe.
Journal ArticleDOI
U-Pb Geochronology and Isotope Geochemistry of the Archean and Proterozoic Rocks of North-Central Madagascar
Robert D. Tucker,Lewis D. Ashwal,M. J. Handke,Michael A. Hamilton,M. Le Grange,R. A. Rambeloson +5 more
TL;DR: In this paper, a migmatite tonalite gneiss from Ile Sainte Marie is dated precisely at 3.204 Ma and has a Sm−Nd model age (TDM) of 3204 Ma.
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207Pb/206Pb zircon ages and the evolution of the Singhbhum Craton, eastern India: an ion microprobe study1This paper is dedicated to Prof. A.K. Saha, one of the senior co-authors, who passed away after submission of the paper.1
TL;DR: In this article, an ion microprobe was used to measure 207 Pb / 206 Pb ages of single zircons from four key lithologies from the Singhbhum Craton of eastern India.
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.
Journal ArticleDOI
Ore lead isotope ratios in a continuously changing earth
G.L. Cumming,J.R. Richards +1 more
TL;DR: In this paper, a critical re-assessment of the construction of simple ore lead isotopic development curves is followed by three fresh approximations, all designed to involve the minimum possible number of assumptions.
Journal ArticleDOI
Present status of the geochronology of the Precambrian rocks of Rajasthan
TL;DR: In this paper, age determinations of the Precambrian rocks of Rajasthan by RbSr analyses are summarized and discussed, and a lower limit at 2000 m.y. is indicated.
Journal ArticleDOI
Sm-Nd evidence for 3.3 Ga old rocks in Rajasthan, northwestern India
TL;DR: Agarwal et al. as mentioned in this paper showed that granodioritic gneisses from the Aravalli Region, northwestern India, define a Sm-Nd isochron corresponding to an age of 3.31 ± 0.07 Ga and an initial Nd isotopic ratio that is close to chondritic.
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The Sm-Nd age of Kambalda volcanics is 500 Ma too old!
TL;DR: In this article, it was shown that the 3.2 Ga age is incorrect and that the Sm-Nd array results from mixing between depleted mantle and either older continental crust or enriched mantle.
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A. B. Roy,A. Kröner +1 more