Iridium concentrations and abundances of meteoritic ejecta from the Eltanin impact in sediment cores from POLARSTERN cruise ANT-XII/4
Fuente:
PANGAEA
Guardado en:
| Autor principal: | |
|---|---|
| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2011
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1867172222389452800 |
|---|---|
| author | Kyte, Frank T |
| author_facet | Kyte, Frank T |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The abundances of meteoritic ejecta from the Eltanin asteroid impact have been examined in seven sediment cores recovered by the FS Polarstern during expedition ANT XII/4 using elemental concentrations of iridium and weights of coarse (>500 ?m) ejecta debris. Three cores with well-preserved impact deposits, PS2704-1, PS2708-1, and PS2709-1, each contain Ir and ejecta fluences similar to those found previously in USNS Eltanin core E13-4. Small Ir anomalies and traces of ejecta were found in cores PS2706-1 and PS2710-1, but since these cores lack well-defined deposits, these are considered to be reworked and not representative of the fallout. No evidence of ejecta was found in cores PS2702-1 and PS2705-1. These results confirm earlier speculation that the Eltanin impact resulted in deposits of ejecta with up to 1 g/cm**2 of debris over a wide area of the ocean floor. However, there are still large uncertainties over the actual regional or global extent of this unique sediment deposit. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_771421 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Iridium concentrations and abundances of meteoritic ejecta from the Eltanin impact in sediment cores from POLARSTERN cruise ANT-XII/4 Kyte, Frank T ANT-XII/4; AWI_Paleo; ELT10; ELT10.002-PC; ELT13; ELT13.003-PC; ELT13.004-PC; Eltanin; KL; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; PC; Piston corer; Piston corer (BGR type); Polarstern; PS2702-1; PS2704-1; PS2706-1; PS2708-1; PS2709-1; PS2710-1; PS35/193; PS35/196; PS35/199; PS35/201; PS35/202; PS35/203; PS35 06AQANTXII_4; Southeast Pacific The abundances of meteoritic ejecta from the Eltanin asteroid impact have been examined in seven sediment cores recovered by the FS Polarstern during expedition ANT XII/4 using elemental concentrations of iridium and weights of coarse (>500 ?m) ejecta debris. Three cores with well-preserved impact deposits, PS2704-1, PS2708-1, and PS2709-1, each contain Ir and ejecta fluences similar to those found previously in USNS Eltanin core E13-4. Small Ir anomalies and traces of ejecta were found in cores PS2706-1 and PS2710-1, but since these cores lack well-defined deposits, these are considered to be reworked and not representative of the fallout. No evidence of ejecta was found in cores PS2702-1 and PS2705-1. These results confirm earlier speculation that the Eltanin impact resulted in deposits of ejecta with up to 1 g/cm**2 of debris over a wide area of the ocean floor. However, there are still large uncertainties over the actual regional or global extent of this unique sediment deposit. |
| title | Iridium concentrations and abundances of meteoritic ejecta from the Eltanin impact in sediment cores from POLARSTERN cruise ANT-XII/4 |
| topic | ANT-XII/4; AWI_Paleo; ELT10; ELT10.002-PC; ELT13; ELT13.003-PC; ELT13.004-PC; Eltanin; KL; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; PC; Piston corer; Piston corer (BGR type); Polarstern; PS2702-1; PS2704-1; PS2706-1; PS2708-1; PS2709-1; PS2710-1; PS35/193; PS35/196; PS35/199; PS35/201; PS35/202; PS35/203; PS35 06AQANTXII_4; Southeast Pacific |
| url | https://doi.org/10.1594/PANGAEA.771421 |