Geological Society of America

26 D3. Recent Advances in Geochronology (Posters)

Sunday, 22 September 2024
8:00 AM - 5:30 PM
Hall D

SANDS OF TIME: INVESTIGATING THE BUNDELKHAND CRATON FROM DETRITAL ZIRCONS IN THE BETWA RIVER

Paper number: 26-7
Program: Technical Sessions
Time: 8:00 AM – 5:30 PM

Authors

Samuel Kwafo Presenting Author
University of Florida, Gainesville, FL
Joseph Meert
University of Florida, Gainesville, FL
George Kamenov
University of Florida, Gainesville, FL
I. Dogancan Yasar
University of Florida, Gainesville, FL
M.K. Pandit
University of Rajasthan, Jaipur
Anup K. Sinha
Dr. K.S. Krishnan Geomagnetic Research Laboratory, Allahabad

Abstract

The Archean Bundelkhand craton in northcentral India hosts numerous Proterozoic basins that preserve a geologic record spanning ~3.3 billion years (3700 Ma - 400 Ma) with documented lacunae, fossils and sedimentary structures that provide insight and evidence of past tectonomagmatic process and evolution. The SE-NW flowing Betwa River, a tributary of the Yamuna river, cuts through the center of the Bundelkhand craton. Sampling along the Betwa River therefore provides an opportunity to conduct a detailed geochronological survey of the craton that likely supplied detritus to the basins. The Bundelkhand craton can be subdivided into an (a) Archean granite-greenstone complex (~3.6–2.6 Ga); (b) Late Archean-Paleoproterozoic granitic plutons (~2.5–2.1 Ga) and; (c) Mafic dyke swarms and quartz-veins of Proterozoic age (Naqvi et al., 1957; Sarkar et al., 1984; Basu, 1986; Sharma and Rahman, 2000, Meert and Pandit, 2015). We present U-Pb and Lu-Hf analyses of detrital zircons from modern river sediments of the Betwa River collected from the Orchha basin dominated by the ~2.5 Ga Bundelkhand Granites and discuss the age spectra and its relationship to the sedimentary rocks in the Vindhyan basin.

Geological Society of America Abstracts with Programs. Vol. 56, No. 5

doi: 10.1130/abs/2024AM-404987

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