INITIAL 182HF/180HF IN METEORITIC ZIRCONS
- 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 | Ireland T.R. | |
dc.contributor.author | Bukovanska M. | |
dc.date.accessioned | 2022-01-01T05:41:01Z | |
dc.date.available | 2022-01-01T05:41:01Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=5189003 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 2003, 67, 24, 4849-4856 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/33991 | |
dc.description.abstract | Zircons from the Simmern H5 chondrite and Pomozdino eucrite have been analyzed for their Hf-W isotope systematics. Zircons have high intrinsic Hf contents and coupled with low W, make them ideal Hf-W chronometers. However, measurements of (182Hf/180Hf)0 are far from straightforward with low signals of radiogenic 182W and difficulties in calibrating Hf/W ratios. Zircons were analyzed from the Simmern chondrite, and the Pomozdino eucrite. The Simmern zircon has an ultrarefractory-enriched trace element pattern, a feature commonly associated with refractory inclusions. Analyses of Simmern zircon show variable Hf/W that is likely due to surface contamination. Simmern chondrite zircon yields a (182Hf/180Hf)0 of 7.2 (+/- 4.5) x 10-5. Pomozdino eucrite zircon analyses show very high Hf/W values indicating (182Hf/180Hf)0 of 1.7 (+/- 1.1) x 10-5. The Simmern value is in good agreement with the initial value of the solar system indicated from Hf-W systematics of chondrites. The Pomozdino value is lower than expected if eucrites formed within several million years of refractory inclusions as suggested from Al-Mg systematics of eucrites. | |
dc.title | INITIAL 182HF/180HF IN METEORITIC ZIRCONS | |
dc.type | Статья |
Files in this item
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru