Long-term (10(5)) or short-term (10(3)) δ13C excursion near the Palaeocene-Eocene transition: Evidence from the Tethys

Details

Serval ID
serval:BIB_68B7BA1104BD
Type
Article: article from journal or magazin.
Collection
Publications
Title
Long-term (10(5)) or short-term (10(3)) δ13C excursion near the Palaeocene-Eocene transition: Evidence from the Tethys
Journal
Terra Nova
Author(s)
Lu G.Y., Keller G., Adatte T., Ortiz N., Molina E.
ISSN-L
0954-4879
Publication state
Published
Issued date
1996
Peer-reviewed
Oui
Volume
8
Pages
347-355
Language
english
Abstract
Expanded sedimentary records from the Tethys reveal unique :faunal and
isotopic changes across the Palaeocene-Eocene (P-E) transition. Unlike
in the open oceans, the Tethys exhibits a gradual decrease of 1.5 parts
per thousand in delta(13)C values prior to the rapid delta(13)C
excursion. Associated with the delta(13)C excursion is a decrease in
calcite burial, increase in detrital content and appearance of a unique
opportunistic planktic foraminiferal assemblage (e.g. compressed
acarininids). The existence of a prelude decrease in delta(13)C values
in the Tethys suggests that the P-E delta(13)C excursion may have
occurred in two steps and over a few hundred thousand years, rather than
as one step over a few thousand years as previously suggested. This
slower excursion rate is readily explained by changing organic carbon
weathering or burial rates and avoids the need of invoking ad hoc
scenarios.
Create date
28/09/2012 10:02
Last modification date
20/08/2019 14:23
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