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Descripción

The Early Albian Oceanic Anoxic Event 1b (OAE 1b) black shale is interrupted by one or more ventilation events that display significant changes in benthic and planktic populations. Within the OAE 1b sections studied, at ODP Site 1049, DSDP Site 545, and the Vocontian Basin, the benthic foraminiferal repopulation events last between ~500 and ~1,250 years and occur with a cyclicity of approximately 5.7 kyr. This period may represent an amplitude modulation of the precessional cycle. The OAE 1b sections from the marginal setting of the Vocontian Basin exhibit up to eight repopulation events. In contrast, there is only one repopulation event identified in the Atlantic OAE 1b sections from the Mazagan Plateau (DSDP 545) and Blake Nose (ODP 1049). Within the margin of dating uncertainties, this supraregional repopulation event occurred synchronously in the Vocontian Basin and the Atlantic Ocean. While the OAE 1b black shale formed under extremely warm and humid conditions, the repopulation events occurred during intervals of short-term cooling and reduced humidity at deep-water formation sites. The resulting increase in evaporation led to enhanced formation of low-latitude deep water, thus improving the ventilation of the sea floor.

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PANGAEA - Publishing Network for Geoscientific & Environmental Data  

Autor(es)

Friedrich, Oliver -  Nishi, Hiroshi -  Pross, Jörg -  Schmiedl, Gerhard -  Hemleben, Christoph - 

Id.: 51829273

Idioma: inglés  - 

Versión: 1.0

Estado: Final

Tipo:  application/zip, 3 datasets - 

Palabras clave79 -  545 -  A. bronni -  A. cretaceus -  A. planiusculus -  A. siliceus -  Ammobaculites sp. -  Ammodiscus -  Ammodiscus cretaceus -  Ammodiscus siliceus -  Ammodiscus sp. -  Arboudeysse -  Arenoturrispirillina -  Astacolus bronni -  Astacolus planiusculus -  Astacolus sp. -  Bimonilina -  Bulbobaculites sp. -  C. aptiensis -  Conorotalites aptiensis -  Conorotalites sp. -  Counting 125 -  500 µm fraction -  D. oxycona -  Deep Sea Drilling Project -  Dendrophyra sp. -  Dentalina sp. -  Depth -  DEPTH, sediment/rock -  Dorothia -  Dorothia oxycona -  Dorothia sp. -  DRILL -  Drilling/drill rig -  DSDP -  Epistomina sp. -  F. moesina -  Falsogaudryinella moesina -  Foram bent -  Foram bent agg -  Foraminifera, benthic -  Foraminifera, benthic agglutinated -  France -  G. flandrini -  G. intermedia -  G. nitidus -  G. prisca -  Gaudryina -  Gaudryina sp. -  Gavelinella flandrini -  Gavelinella intermedia -  Gavelinella sp. -  GeoTü -  Globulina prisca -  Globulina sp. -  Glomar Challenger -  Glomospira -  Glomospira sp. -  Gyroidinoides -  Gyroidinoides nitidus -  Gyroidinoides sp. -  Haplophragmoides sp. -  Hormosina sp. -  Hyperammina sp. -  L. alexanderi -  L. communis -  L. distincta -  L. distributa -  L. dunkeri -  L. muensteri -  L. nodosaria -  L. oligostegia -  L. pulchella -  L. soluta -  L. subangulata -  L. subaperta -  L. turgidula -  Label -  Laevidentalina -  Laevidentalina communis -  Laevidentalina distincta -  Laevidentalina oligostegia -  Laevidentalina soluta -  Laevidentalina sp. -  Lagenammina -  Lagenammina alexanderi -  Lagenammina distributa -  Lagenammina sp. -  Leg79 -  Lenticulina -  Lenticulina dunkeri -  Lenticulina muensteri -  Lenticulina pulchella -  Lenticulina sp. -  Lenticulina subangulata -  Lenticulina subaperta -  Lenticulina turgidula -  Lingulina -  Lingulina nodosaria -  Lingulina sp. -  Moriez -  North Atlantic/PLATEAU -  O. globosa -  O. schloenbachi -  ODP sample designation -  Oolina globosa -  Oolina sp. -  Osangularia -  Osangularia schloenbachi -  Osangularia sp. -  P. acuminatus -  P. complanata -  P. humilis -  P. paucistriata -  P. reussi -  P. screptum -  Paleoceanography at Tübingen University -  Planularia complanata -  Pleurostomella reussi -  PROFILE -  Profile sampling -  Pseudobolivina -  Pseudobolivina sp. -  Pseudonodosaria humilis -  Psilocitharella sp. -  Pyramidulina paucistriata -  Pyramidulina screptum -  Pyrulinoides acuminatus -  Quinqueloculina sp. -  R. aculeata -  R. cylindrica -  R. duplex -  R. fusiformis -  R. globotubulosa -  R. tetrahedralis -  Ramulina aculeata -  Ramulina fusiformis -  Ramulina globotubulosa -  Ramulina sp. -  Ramulina tetrahedralis -  Reophax -  Reophax duplex -  Reophax sp. -  Rhabdammina -  Rhabdammina cylindrica -  Rhabdammina sp. -  Rhizammina -  Rhizammina sp. -  S. erlita -  S. pyramidata -  S. spinosa -  S. triangularis -  Saccammina -  Saccammina sp. -  Sample code/label -  Saracenaria erlita -  Saracenaria pyramidata -  Saracenaria sp. -  Saracenaria spinosa -  Saracenaria triangularis -  Section -  SECTION, height -  species questionable -  Spiroplectinata sp. -  T. vocontiana -  Technitella sp. -  Textularia sp. -  Textulariopsis sp. -  Triplasia -  Trochammina sp. -  Trochammina vocontiana -  Uvigerinammina sp. -  V. harpa -  Vaginulinopsis harpa -  Valingulinopsis harpa -  Valingulinopsis sp. -  Valvulineria sp. -  Var 1 - 

Cobertura:  MEDIAN LATITUDE: 40.647767 * MEDIAN LONGITUDE: 0.498933 * SOUTH-BOUND LATITUDE: 33.664300 * WEST-BOUND LONGITUDE: -9.364700 * NORTH-BOUND LATITUDE: 44.274000 * EAST-BOUND LONGITUDE: 5.517500 * DATE/TIME START: 1981-04-23T00:00:00 * DATE/TIME END: 1998-08-15T00:00:00 - 

Tipo de recurso: Dataset  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: CC-BY: Creative Commons Attribution 3.0 Unported

Formatos:  application/zip, 3 datasets - 

Requerimientos técnicos:  Browser: Any - 

Relación: [IsBasedOn] Supplement to: Friedrich, Oliver; Nishi, Hiroshi; Pross, Jörg; Schmiedl, Gerhard; Hemleben, Christoph (2005): Millennial- to Centennial-Scale interruptions of the Oceanic Anoxic Event 1b (Early Albian, mid-Cretaceous) inferred from benthic foraminiferal repopulation events. Palaios, 20(1), 64-77, doi:10.2110/palo.2003.p03-75

Fecha de contribución: 15-oct-2016

Contacto:

Localización:
* doi:10.1594/PANGAEA.736818

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