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| Titel |
Evaluation of clumped-isotopes of land snail's shells as a paleo-environmental indicator |
| VerfasserIn |
Mikhail Vasiliev, Keita Yamada, Naohiro Yoshida |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250053740
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| Zusammenfassung |
| Oxygen and carbon isotopic composition of land snail shells (carbonates) have been used as
an indicator of terrestrial paleo-environmental variables such as plant vegetation,
precipitation and temperature. The oxygen isotope ratio (δ18O) of snail’s shells is expressed
as a function of temperature and δ18O of environmental water (precipitation). Evaluated
temperature of carbonates in environment may give us information about oxygen isotopic
ration in precipitated water. Clumped-isotopes analysis of carbonates (13C-18O bond in
crystal lattice of carbonate minerals) is only sensitive to their growth temperature.
Therefore, the clumped-isotopes and δ18O analyses in the shells potentially provide
information on the paleo-temperature and allow making estimation of the oxygen isotope
ration in water independently. Here we analyzed different types of modern land
snails collected at several sampling sites in Japan and evaluated the applicability of
clumped-isotopes and δ18O of land snail’s shells as paleo-environmental indicators. |
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