(Supplementary Table 1) 230Th/U results for stalagmite Cuba Grande (CG) from Pinar del Rio, supplementary data to: Fensterer, Claudia; Scholz, Denis; Hoffmann, Dirk; Mangini, Augusto; Pajon, Jesus M (2010): 230Th/U-dating of a late Holocene low uranium speleothem from Cuba. IOP Conference Series: Earth and Environmental Science, 9(1), 012015

We present 22 U-series ages for a stalagmite from north-western Cuba based on multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) and thermal ionisation mass spectrometry (TIMS). Our results reveal that the stalagmite continuously grew within the last ~1400a. Low uranium content...

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Bibliographic Details
Main Authors: Fensterer, Claudia (Author) , Scholz, Denis (Author) , Hoffmann, Dirk (Author)
Other Authors: Mangini, Augusto (Other) , Pajon, Jesus M (Other)
Format: Book/Monograph Research Data
Language:English
Published: Bremen/Bremerhaven PANGAEA - Data Publisher for Earth & Environmental Science 2010-04-12
DOI:10.1594/PANGAEA.736630
Subjects:
Online Access:Resolving-System, Volltext: http://dx.doi.org/10.1594/PANGAEA.736630
Resolving-System, Volltext: http://nbn-resolving.de/urn:nbn:de:tib-10.1594/PANGAEA.7366307
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520 |a We present 22 U-series ages for a stalagmite from north-western Cuba based on multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) and thermal ionisation mass spectrometry (TIMS). Our results reveal that the stalagmite continuously grew within the last ~1400a. Low uranium content of the sample and thus, extremely low 230Th concentrations limit the precision and accuracy of 230Th/U-dating by TIMS. Samples measured by MC-ICPMS show a high variability of 232Th content along the growth axis with some sections significantly affected by initial 230Th from a detrital phase. An a-priori bulk earth ratio for (238U/232Th) cannot be used to accurately account for this initial 230Th. Using an age model based on the 230Th/U ages determined on samples with low or negligible 232Th concentration, we find that the (238U/232Th) activity ratio of the detrital phase is an order of magnitude larger than the bulk earth value, indicating the importance of an accurately determined correction factor. 
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