Ad Astra Awards
Ad Astra Journal
Science library
White book
University rankings
Who's who
Publications
Theses and dissertations
Ad Astra association
 
Press releases
News
Events
Funding opportunities
 
Login
Registration
 
>> Românã
 
   
 

Sanna, L., Saez, F., Simonsen, S., Constantin, S., Calaforra, J-M., Forti, P., Lauritzen, S. -E. . Uranium-series dating of gypsum speleothems: methodology and examples. International Journal of Speleology, 39 (1), pp. 35-46, 2010.

Abstract: The analytical problems of dating gypsum speleothems with the U-series technique are reviewed. Gypsum speleothems are, in general, very low in U content, challenging the limits of detection methods. Various approaches to dissolving gypsum and isolation of actinides from the matrix include ion-pairing dissolution with magnesium salts and using nitric acid. The most precise dating technique is Thermal Ionization Mass Spectrometry (TIMS), combined with Fe(OH)3 scavenging and anionic exchange chromatography. Less satisfactory, but much quicker, is direct retention of actinides from HNO3 by means of TRU resin and MC-ICP-MS detection. We have tested these methods on gypsum speleothems from the Sorbas karst in Spain and from the Naica caves in Mexico.

Keywords: Uranium series dating, gypsum, cave, methodology

URL: http://www.ijs.speleo.it

Posted by Silviu Constantin

Back

   
© Ad Astra 2001-2013