EarthRef.org Reference Database (ERR) -- Kumar et al. 2003

EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information

Kumar et al. 2003

Kumar, A., Dayal, A.M. and Padmakumari, V.M. (2003). Kimberlite from Rajmahal magmatic province: Sr-Nd-Pb isotopic evidence for Kerguelen plume derived magmas. Geophysical Research Letters 30: doi: 10.1029/2003GL018462. issn: 0094-8276.

Previous studies showed that the Rajmahal-Sylhet-Bengal (RSB) flood basalt province (117 ¿ 2 Ma) in eastern India was spatially close to the active Kerguelen hotspot about 118 Ma ago. Yet, it could not be unequivocally correlated to this hotspot due to wide variation in isotopic compositions of both the RSB and Kerguelen plateau basalts. However, we report Sr-Nd-Pb isotopic compositions (87Sr/86Sri: 0.70535 to 0.70561; ϵNd(T): -2.6 to -3.2; 206Pb/204Pbi: 17.88 to 18.07) of a co-eval (116 ¿ 2 Ma) Group II kimberlite from this flood basalt province that is identical to recently identified pristine Kerguelen plume basalts from the Kerguelen Plateau/Archipelago and Broken Ridge. This suggests that the Kerguelen hotspot could indeed be responsible for the ~117 Ma magmatic activity in Eastern India.

BACKGROUND DATA FILES

	Abstract

Keywords
Geochemistry, Composition of the mantle, Geochemistry, Isotopic composition/chemistry, Oceanography, Biological and Chemical, Geochemistry, Information Related to Geographic Region, Indian Ocean, Volcanology, Planetary volcanism

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org