Trace element concentrations in zircons from ODP Holes 147-894G and 153-923A
Fuente:
PANGAEA
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Dataset Open Access |
| Sprache: | en |
| Veröffentlicht: |
PANGAEA
2006
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1867171357505093632 |
|---|---|
| author | Coogan, Laurence A Hinton, Richard W |
| author_facet | Coogan, Laurence A Hinton, Richard W |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The trace element compositions of Hadean zircons have been used in two ways to argue for the existence of Hadean continental crust. One argument is based on low crystallization temperatures of Hadean zircons that have been determined using a novel geothermometer based on the Ti content of zircons in equilibrium with rutile. The second argument is based on using the trace element abundances in zircons to calculate their parental melt compositions, especially the rare earth elements. Here we demonstrate that zircons that grow from a melt formed by basalt differentiation at modern mid-ocean ridges cannot be unambiguously distinguished from Hadean zircons on either of these grounds. Thus, we conclude that the trace element compositions of Hadean zircons are permissive of models that do not include the generation of continental crust in the Hadean. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_721807 |
| institution | PANGAEA |
| language | en |
| publishDate | 2006 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Trace element concentrations in zircons from ODP Holes 147-894G and 153-923A Coogan, Laurence A Hinton, Richard W 147-894G; 153-923A; DRILL; Drilling/drill rig; Joides Resolution; Leg147; Leg153; North Atlantic Ocean; North Pacific Ocean; Ocean Drilling Program; ODP The trace element compositions of Hadean zircons have been used in two ways to argue for the existence of Hadean continental crust. One argument is based on low crystallization temperatures of Hadean zircons that have been determined using a novel geothermometer based on the Ti content of zircons in equilibrium with rutile. The second argument is based on using the trace element abundances in zircons to calculate their parental melt compositions, especially the rare earth elements. Here we demonstrate that zircons that grow from a melt formed by basalt differentiation at modern mid-ocean ridges cannot be unambiguously distinguished from Hadean zircons on either of these grounds. Thus, we conclude that the trace element compositions of Hadean zircons are permissive of models that do not include the generation of continental crust in the Hadean. |
| title | Trace element concentrations in zircons from ODP Holes 147-894G and 153-923A |
| topic | 147-894G; 153-923A; DRILL; Drilling/drill rig; Joides Resolution; Leg147; Leg153; North Atlantic Ocean; North Pacific Ocean; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.721807 |