- Title
- Using the 14C bomb pulse to date young speleothems
- Creator
- Hodge, Ed; McDonald, Janece; Fischer, Matthew; Redwood, Dale; Hua, Quan; Levchenko, Vladimir; Drysdale, Russell; Waring, Chris; Fink, David
- Relation
- Radiocarbon Vol. 53, Issue 2, p. 345-357
- Relation
- https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3467
- Publisher
- University of Arizona Department of Geosciences
- Resource Type
- journal article
- Date
- 2011
- Description
- Three modern speleothems were sampled at high resolution for radiocarbon analysis to identify their bombpulse signatures and to construct chronologies. Each speleothem exhibited a different 14C response, presumed to be related to site characteristics such as vegetation, temperature, rainfall, depth below the surface, and water pathway through the aquifer. Peak 14C activity for WM4 is 134.1 pMC, the highest cited thus far in the literature and suggestive of a lower inertia at this site. Dead carbon fractions for each stalagmite were calculated and found to be relatively similar for the 3 speleothems and lower than those derived from Northern Hemisphere speleothems. An inverse modeling technique based on the work of Genty and Massault (1999) was used to estimate soil carbon residence times. For each speleothem, mean soil 14C reservoir ages differed greatly between the 3 sites, ranging from 2–6.5 to 32–46 yr.
- Subject
- speleothems; radiocarbon analysis; <sup>14</sup>C; bomb-pulse signatures
- Identifier
- http://hdl.handle.net/1959.13/1043004
- Identifier
- uon:14156
- Identifier
- ISSN:0033-8222
- Language
- eng
- Full Text
- Reviewed
- Hits: 10043
- Visitors: 10294
- Downloads: 427
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | ATTACHMENT01 | Publisher version (open access) | 135 KB | Adobe Acrobat PDF | View Details Download |