A search for iridium in the deccan traps and inter-traps - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 1988

A search for iridium in the deccan traps and inter-traps

Résumé

It has been suggested that flood basalts in the Deccan (India) might be associated with events at the Cretaceous-Tertiary boundary (KTB). A search for iridium in 47 samples from lava flows and inter-trap sediments in the Deccan yields negative results. Concentrations are not statistically different from zero, with a minimum detection level on the order of 0.1 ng.g$^{-1}$ (ppb). This does not help to constrain the debate on the internal vs external origin of KTB boundary events, since for instance Ir could have been outgassed from the magma, and original concentrations of only 0.05 ng.g$^{-1}$ prior to outgassing aresufficient to account for the worldwide Ir excess mass at the KTB.
Fichier principal
Vignette du fichier
Geophysical Research Letters - August 1988 - Rocchia - A search for iridium in the Deccan Traps and Inter%u2010Traps.pdf (382.6 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03551212 , version 1 (01-02-2022)

Identifiants

Citer

R. Rocchia, D. Boclet, V. Courtillot, J. J Jaeger. A search for iridium in the deccan traps and inter-traps. Geophysical Research Letters, 1988, 15 (8), pp.812-815. ⟨10.1029/GL015i008p00812⟩. ⟨hal-03551212⟩
74 Consultations
115 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More