PRECISE TH/U-DATING OF SMALL AND HEAVILY COATED SAMPLES OF DEEP SEA CORALS
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Lomitschka M. | |
dc.contributor.author | Mangini A. | |
dc.date.accessioned | 2021-01-09T04:59:51Z | |
dc.date.available | 2021-01-09T04:59:51Z | |
dc.date.issued | 1999 | |
dc.identifier | https://elibrary.ru/item.asp?id=152084 | |
dc.identifier.citation | Earth and Planetary Science Letters, 1999, , 4, 391-401 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/22467 | |
dc.description.abstract | Marine carbonate skeletons like deep-sea corals are frequently coated with iron and manganese oxides/hydroxides which adsorb additional thorium and uranium out of the sea water. A new cleaning procedure has been developed to reduce this contamination. In this further cleaning step a solution of Na2EDTA (Na2H2TB) and ascorbic acid is used which composition is optimised especially for samples of 20 mg of weight. It was first tested on aliquots of a reef-building coral which had been artificially contaminated with powdered ferromanganese nodule. Applied on heavily contaminated deep-sea corals (scleractinia), it reduced excess 230Th by another order of magnitude in addition to usual cleaning procedures. The measurement of at least three fractions of different contamination, together with an additional standard correction for contaminated carbonates results in Th/U-ages corrected for the authigenic component. A good agreement between Th/U- and 14C-ages can be achieved even for extremely coated corals. | |
dc.subject | DEEP-SEA ENVIROMENT | |
dc.subject | SCLERACTINIA | |
dc.subject | URANIUM DISEQUILIBRIUM | |
dc.subject | ABSOLUTE AGE | |
dc.title | PRECISE TH/U-DATING OF SMALL AND HEAVILY COATED SAMPLES OF DEEP SEA CORALS | |
dc.type | Статья |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru