Iridium-bearing sublimates at a hot-spot volcano (Piton de la Fournaise, Indian Ocean)

Details Iridium-bearing sublimates at a hot-spot volcano (Piton de la Fournaise, Indian Ocean) Iridium-bearing sublimates at a hot-spot volcano (Piton de la Fournaise, Indian Ocean)

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16.1391t&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, Dec. 1989, p. 1391-1394.

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12

Earth Surface, Indium, Volcanoes, Neutron Activation Analysis, Volatility

Scientific paper

Sublimates and incrustations derived upon the cooling of volcanic gases have been collected on various sites. They have been analyzed for Ir and other volatile elements by means of instrumental neutron activation analysis and proton induced X-ray emission. Among the investigated volcanoes, only Piton de la Fournaise is found to release detectable amounts of iridium. Ir in Piton de la Fournaise sublimates is associated with F-minerals. This confirms its gaseous transport as a volatile fluoride compound. Iridium seems to be preferentialy released by hot-spot type volcanoes, and its detection in Piton de la Fournaise sublimates provides a positive argument in favor of a volcanic hypothesis to explain the KTB events.

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