Evidence of crustal reworking in the Mesoarchean: Insights from geochemical, U-Pb zircon and Nd isotopic study of a 3.08–3.12 Ga ferro-potassic granite-gneiss from north-eastern margin of Singhbhum Craton, India
TL;DR: The Bangriposi Granite Gneiss as discussed by the authors is composed of quartz, alkali feldspar, ferroan biotite (Fe/Fe+Mg: 0.7-0.9), titanite, illmenite, hastingsite, apatite, and numerous U-ThREE bearing accessory phases.
About: This article is published in Lithos.The article was published on 2019-04-01. It has received 27 citations till now. The article focuses on the topics: Zircon & Felsic.
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TL;DR: In this article, the authors report new zircon U-Pb and Hf isotopic data from key stratigraphic intervals in the Archean nucleus and the North Singhbhum Mobile Belt.
87 citations
TL;DR: In this paper, detrital zircon data from the Singhbhum craton of eastern India were used for a detailed analysis of siliciclastic strata in the (lower) Simlipal volcano-sedimentary succession.
22 citations
TL;DR: In this paper, the authors investigate a gabbro-anorthosite complex from the eastern margin of the Singhbhum craton exposed at Besoi, Kuliana, Sarat and Jashipura areas.
22 citations
TL;DR: In this paper, the authors reported a precise 3510±3µMa U-Pb LA-ICP-MS zircon age from a well-preserved felsic volcaniclastic unit of the Gorumahisani Greenstone Belt (GGB) exposed in the north-eastern part of the craton.
20 citations
13 citations
Cites background from "Evidence of crustal reworking in th..."
...Chakraborti et al. (2019) reported LA-ICP MS U–Pb zircon ages of crystallization ranging between 3,079....
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...Chakraborti et al. (2019) reported LA-ICP MS U–Pb zircon ages of crystallization ranging between 3,079.4 ± 6.8 Ma and 3,115 ± 10 Ma of the anorogenic granite from the southeastern margin of the NSMB. Dey et al. (2017) identified three phases of granitoid emplacement at 3.47, 3.35, and 3.30 Ga from…...
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...(Figure 2; reviews in Acharyya et al., 2010a; Chakraborti et al., 2019; Chaudhuri, 2020; Mazumder, van Loon, et al., 2012; Mishra et al., 1999; Misra, 2006; Mukhopadhyay & Matin, 2020; Pandey et al., 2019; Saha, 1994; Upadhyay et al., 2014, 2019)....
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References
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TL;DR: In this paper, the authors compared the relative abundances of the refractory elements in carbonaceous, ordinary, and enstatite chondritic meteorites and found that the most consistent composition of the Earth's core is derived from the seismic profile and its interpretation, compared with primitive meteorites, and chemical and petrological models of peridotite-basalt melting relationships.
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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.
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TL;DR: In this paper, the results of a study to develop natural zircon geochemical standards for calibrating the U-(Th)-Pb geochronometer and Hf isotopic analyses are reported.
Abstract: We report here the results of a study to develop natural zircon geochemical standards for calibrating the U-(Th)-Pb geochronometer and Hf isotopic analyses. Additional data were also collected for the major, minor and trace element contents of the three selected sample sets. A total of five large zircon grains (masses between 0.5 and 238 g) were selected for this study, representing three different suites of zircons with ages of 1065 Ma, 2.5 Ma and 0.9 Ma. Geochemical laboratories can obtain these materials by contacting Geostandards Newsletter.
4,845 citations
TL;DR: A-type granites as mentioned in this paper were found to have high SiO2, Na2O+K2O, Fe/Mg, Ga/Al, Zr, Nb, Ga, Y and Ce, and low CaO and Sr.
Abstract: New analyses of 131 samples of A-type (alkaline or anorogenic) granites substantiate previously recognized chemical features, namely high SiO2, Na2O+K2O, Fe/Mg, Ga/Al, Zr, Nb, Ga, Y and Ce, and low CaO and Sr. Good discrimination can be obtained between A-type granites and most orogenic granites (M-, I and S-types) on plots employing Ga/Al, various major element ratios and Y, Ce, Nb and Zr. These discrimination diagrams are thought to be relatively insensitive to moderate degrees of alteration. A-type granites generally do not exhibit evidence of being strongly differentiated, and within individual suites can show a transition from strongly alkaline varieties toward subalkaline compositions. Highly fractionated, felsic I- and S-type granites can have Ga/Al ratios and some major and trace element values which overlap those of typical A-type granites. A-type granites probably result mainly from partial melting of F and/or Cl enriched dry, granulitic residue remaining in the lower crust after extraction of an orogenic granite. Such melts are only moderately and locally modified by metasomatism or crystal fractionation. A-type melts occurred world-wide throughout geological time in a variety of tectonic settings and do not necessarily indicate an anorogenic or rifting environment.
4,216 citations
TL;DR: In this paper, a laser ablation-inductively coupled plasma-mass spectrometer (LA-ICP-MS) was used for in situ U-Pb zircon geochronology.
4,092 citations