Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5783562 | Geochimica et Cosmochimica Acta | 2017 | 50 Pages |
Abstract
We propose that the elevated Zr/Hf and Y/Ho ratios previously reported for Australian fluvial sediments reflect, at least in part, the long history of palaeo-fires in the catchments of these rivers, with preferential removal, transport and sedimentation of the readily weathered, high Y/Ho and Zr/Hf cortex material that is a product of thermal alteration of Fe nodules. In addition, since magnetic Fe nodules are demonstrably related to fire, they may represent a promising, directly dateable record of severe fires, which can complement the sedimentary charcoal record.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
Stefan C. Löhr, David T. Murphy, Luke D. Nothdurft, Robert Bolhar, Sandra Piazolo, Coralie Siegel,