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Paleoarchean Zircons from Quartzite of South Bundelkhand Supracrustal Complex:Origin and Implications for Crustal Evolution in Bundelkhand Craton, Central India


Affiliations
1 Institute of Geology, Karelian Research Centre, RAS, Petrozavodsk, Russian Federation
2 Department of Geology, Bundelkhand University, Jhansi 284 128, India
3 Geoscience Division, Physical Research Laboratory, Ahmedabad 380 009, India
4 School of Earth and Space Sciences, Peking University, Beijing, China
 

The present study reports trace elemental data from 39 Paleoarchean (3.43 and 3.25 Ga) zircons separated from quartzite near Girar, which forms a part of the South Bundelkhand Supracrustal Complex in Central India. The zircons are prismatic, have well-developed oscillatory zoning and their Th/U ratio ranging from 0.27 to 8.62 is comparable to that of typical magmatic zircons. Crystallization temperature of 620-776°C using titanium-in-zircon thermometer, positive slope of zircon REE patterns, positive Ce anomalies along with mineral inclusions like quartz, muscovite, magnetite and monazite suggest a granitic source for these quartzites. Sm-Nd isotopic data (TDM age = 3.29 Ga) along with zircon trace elemental data indicate the presence of granitic continental crust in southern Bundelkhand Craton at least during the Paleoarchean (3.4 Ga).

Keywords

Bundelkhand Craton, Girar Supracrustal Belt, Quartzites, Rare Earth Elements, Zircon Chemistry.
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  • Paleoarchean Zircons from Quartzite of South Bundelkhand Supracrustal Complex:Origin and Implications for Crustal Evolution in Bundelkhand Craton, Central India

Abstract Views: 396  |  PDF Views: 142

Authors

Alexander Slabunov
Institute of Geology, Karelian Research Centre, RAS, Petrozavodsk, Russian Federation
Vinod K. Singh
Department of Geology, Bundelkhand University, Jhansi 284 128, India
Kumar Batuk Joshi
Geoscience Division, Physical Research Laboratory, Ahmedabad 380 009, India
Xiaoli Li
School of Earth and Space Sciences, Peking University, Beijing, China

Abstract


The present study reports trace elemental data from 39 Paleoarchean (3.43 and 3.25 Ga) zircons separated from quartzite near Girar, which forms a part of the South Bundelkhand Supracrustal Complex in Central India. The zircons are prismatic, have well-developed oscillatory zoning and their Th/U ratio ranging from 0.27 to 8.62 is comparable to that of typical magmatic zircons. Crystallization temperature of 620-776°C using titanium-in-zircon thermometer, positive slope of zircon REE patterns, positive Ce anomalies along with mineral inclusions like quartz, muscovite, magnetite and monazite suggest a granitic source for these quartzites. Sm-Nd isotopic data (TDM age = 3.29 Ga) along with zircon trace elemental data indicate the presence of granitic continental crust in southern Bundelkhand Craton at least during the Paleoarchean (3.4 Ga).

Keywords


Bundelkhand Craton, Girar Supracrustal Belt, Quartzites, Rare Earth Elements, Zircon Chemistry.



DOI: https://doi.org/10.18520/cs%2Fv112%2Fi04%2F794-801