Controversial Pb-Pb and Sm-Nd isotope results in the early Archean Isua (West Greenland) oxide iron formation:preservation of primary signatures versus secondary disturbances
Pb stepwise leaching (PbSL) determinations on two magnetite-enriched fractions of a BIF sample from the northeastern part of the Isua supracrustal belt (West Greenland) yield an isochron of 3691 ± 22 Ma (MSWD = 0.4). In combination with previously published geochronological constraints for a minimum...
| Published in: | Geochimica et Cosmochimica Acta |
|---|---|
| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1999
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| Subjects: | |
| Online Access: | https://forskning.ruc.dk/da/publications/936c336e-36cb-4aff-b8ea-542b9aad59b3 https://doi.org/10.1016/S0016-7037(98)00290-7 https://hdl.handle.net/1800/936c336e-36cb-4aff-b8ea-542b9aad59b3 |