U th dating speleothems

Uranium Series Dating of Speleothems

В тот момент, когда он поравнялся с сиденьем, на котором сидела девушка, и подумал, что именно ей скажет, автобус проехал под уличным фонарем, на мгновение осветившим лицо обладателя трехцветной шевелюры.

- Потом в его голосе зазвучали зловещие нотки. Только мы трое.

Он стоит десять раз по двадцать миллионов.

Radioactive decay of uranium and thorium isotopes at constant rates provides a tool to determine the age of speleothems with high precision and accuracy. As with any dating method, a fundamental prerequisite is the lack of post-depositional alteration, that is, no gain or loss of isotopes within the decay chain of interest.

Using state-of-the-art instrumentation, this method allows dating speleothems between essentially zero and ca. Multiple age determinations are typically performed along the extension axis of a stalagmite to decipher its detailed growth history. Uranium series chronology of speleothems not only provides useful constraints on speleogenetic processes, but forms the backbone of the increasingly important scientific field using stalagmites and less commonly flowstone as paleoenvironmental archives.

Age determination; speleothem; U-Th; U-series; growth rate; paleoclimate. Screen reader users, click here to load entire article This page uses JavaScript to progressively load the article content as a user scrolls.

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Encyclopedia of Caves Second Edition. Summary Radioactive decay of uranium and thorium isotopes at constant rates provides a tool to determine the age of speleothems with high precision and accuracy. Keywords Age determination; speleothem; U-Th; U-series; growth rate; paleoclimate. Recommended articles No articles found. Citing articles 0 This article has not been cited. Related book content No articles found.

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