Early Maastrichtian stable isotopes: changing deep water sources in the North Atlantic?
Fuente:
PANGAEA
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2004
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1867167660047859712 |
|---|---|
| author | Friedrich, Oliver Herrle, Jens O Kößler, Peter Hemleben, Christoph |
| author_facet | Friedrich, Oliver Herrle, Jens O Kößler, Peter Hemleben, Christoph |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We propose that the observed short-term stable isotope fluctuations reflect changes in high- and low-latitude intermediate to deep water sources, based on a high-resolution stable isotope record of planktic and benthic foraminifera from the Early Maastrichtian (~71.3 to ~ 69.6 Ma) of Blake Nose (DSDP Site 390A, North Atlantic). Sources of these waters may have been the low-latitude eastern Tethys and high-latitude North Atlantic. Changes in intermediate to deep water sources were probably steered by eccentricity-controlled insolation fluctuations. Lower insolation favored the formation of high-latitude deep waters due to positive feedback mechanisms resulting in high-latitude cooling. This led to a displacement of low-latitude deep waters at Blake Nose. Higher insolation reduced intermediate to deep-water formation in high latitudes, yielding a more northern flow of low-latitude deep waters. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_694724 |
| institution | PANGAEA |
| language | en |
| publishDate | 2004 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Early Maastrichtian stable isotopes: changing deep water sources in the North Atlantic? Friedrich, Oliver Herrle, Jens O Kößler, Peter Hemleben, Christoph 44-390A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg44; North Atlantic Ocean We propose that the observed short-term stable isotope fluctuations reflect changes in high- and low-latitude intermediate to deep water sources, based on a high-resolution stable isotope record of planktic and benthic foraminifera from the Early Maastrichtian (~71.3 to ~ 69.6 Ma) of Blake Nose (DSDP Site 390A, North Atlantic). Sources of these waters may have been the low-latitude eastern Tethys and high-latitude North Atlantic. Changes in intermediate to deep water sources were probably steered by eccentricity-controlled insolation fluctuations. Lower insolation favored the formation of high-latitude deep waters due to positive feedback mechanisms resulting in high-latitude cooling. This led to a displacement of low-latitude deep waters at Blake Nose. Higher insolation reduced intermediate to deep-water formation in high latitudes, yielding a more northern flow of low-latitude deep waters. |
| title | Early Maastrichtian stable isotopes: changing deep water sources in the North Atlantic? |
| topic | 44-390A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg44; North Atlantic Ocean |
| url | https://doi.org/10.1594/PANGAEA.694724 |