HR: 17:30h
AN: V52G-07    [PDF]
TI: Tephra deposits in the Deccan Trap, Peninsular India
AU: * Chen, C
EM: china@earth.sinica.edu.tw
AF: Institute of Earth Sciences, Academia Sinica, P.O.Box 1-55, Nankang, Taipei, 115 Taiwan
AU: Ku, Y
EM: china@earth.sinica.edu.tw
AF: Department of Geosciences, Taiwan University, ChaoShan Rd., Taipei, 117 Taiwan
AU: Mishra, S
EM: sheilamishra@vsnl.net
AF: Department of Archaeology,, Deccan College, Pune, 411 006 India
AU: Shen, J J
EM: mountain@earth.sinica.edu.tw
AF: Institute of Earth Sciences, Academia Sinica, P.O.Box 1-55, Nankang, Taipei, 115 Taiwan
AU: Iizuka, Y
EM: yiizuka@earth.sinica.edu.tw
AF: Institute of Earth Sciences, Academia Sinica, P.O.Box 1-55, Nankang, Taipei, 115 Taiwan
AB: In this paper, the tephra samples collected from the Bori, the Son valley and the Wardha river in the Deccan Trap, western and central of the Peninsula India were analyzed in the chemical and isotopic compositions. When the tephrostratigrphy and tephrochronlogy of tephra layers in the ODP 758 core in the India Ocean were revised (Chen et al., 2003), it raised more contradictions in terms of the source argument of tuff in the Peninsula India. Based on the new correlation in the chemical and isotopic compositions of volcanic tephra between the Indian Ocean and the inland materials of the Toba eruptions, the tephra sources in the Deccan Trap can be clearly identified from the OTT eruption with the special finger prints of the chemical compositions of mineral crystal and isotopic values of glasses. Therefore, the tephra deposits in above places can be considered as the synchronous event with the OTT eruption about 0.8 Ma, instead of the former of the YTT eruption around 75 Ka (Westgate et al., 1998).
DE: 8404 Ash deposits
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2003 Fall Meeting