Drilling Blake Nose: the search for evidence of extreme Palaeogene–Cretaceous climates and extraterrestrial events

Kroon,; Norris,; Klaus,; Alexander, Ian T; Bardot, Leon; Barker, Charles E.; Bellier, Jean-Pierre; Blome, Charles D.; Clarke, Leon J.; Erbacher, Jochen; Faul, Kristina L; Holmes, Mary Anne; Huber, Brian T.; Katz, Miriam; MacLeod, Kenneth G.; Marca, Sandra La; Martinez‐Ruiz, Francisa C.; Mita, Isao; Nakai, Mutsumi; Ogg, James G.; Pak, Dorothy K.; Pletsch, Thomas; Self‐Trial, Jean M.; Shackleton, Nicholas J; Smit, Jan; Ussler, William; Watkins, David; Widmark, Joen G.V.; Wilson, Paul

doi:10.1046/j.1365-2451.1998.00006.x-i1

Cited by 4 publications

(2 citation statements)

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“…Study samples come from ODP Site 1052, the shallowest site of a depth transect on Blake Nose (western North Atlantic), at a current water depth of 1345 m and (Kroon et al 1998).…”

Section: Geological Settingmentioning

confidence: 99%

Muted calcareous nannoplankton response at the Middle/Late Eocene Turnover event in the western North Atlantic Ocean

Newsam¹,

Bown²,

Wade³

et al. 2017

nos

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The Eocene saw the transition from greenhouse to icehouse climate mode, alongside accompanying palaeoceanographic and biotic change. Peak Paleogene warmth occurred during the Early Eocene Climatic Optimum (52 million years ago (Ma)) followed by cooling through the middle to later part of the Eocene and initiation of Antarctic ice sheet growth by the earliest Oligocene (Zachos et al. 2001). Stable isotope records from the Eocene show high variability over short periods from low, mid and high latitude sites (Okafor et al. 2009) indicating increasing climatic instability, and a number of significant step-like events are superimposed on the broader Eocene cooling trend (Villa et al. 2008). This palaeoclimatic and palaeoceanographic change was accompanied by significant extinctions and turnover in zooplankton groups, with a concentration of extinctions

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“…Study samples come from ODP Site 1052, the shallowest site of a depth transect on Blake Nose (western North Atlantic), at a current water depth of 1345 m and (Kroon et al 1998).…”

Section: Geological Settingmentioning

confidence: 99%

Muted calcareous nannoplankton response at the Middle/Late Eocene Turnover event in the western North Atlantic Ocean

Newsam¹,

Bown²,

Wade³

et al. 2017

nos

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show abstract

“…Location of the Blake Nose paleoceanographic transect, ODP Sites 1049–1053 (ODP Leg 171b), and the Blake Nose study area (inset) in the western North Atlantic (figure from Kroon et al [1998]). Sites used in this study are boxed in figure: shallowest depth ODP Site 1052 (1345 m), intermediate depth ODP Site 1051 (1980 m), and deepest depth ODP Site 1050 (2300 m) (Table 2).…”

Section: Site Characteristicsmentioning

confidence: 99%

Late Cretaceous and early Paleogene nutrient and paleoproductivity records from Blake Nose, western North Atlantic Ocean

2003

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[1] We evaluate phosphorus (P) and biogenic barium (bio-Ba) as nutrient burial and export productivity indicators for the Late Cretaceous and early Paleogene, combining these with calcium carbonate (CaCO 3 ), organic carbon (C), and bulk CaCO 3 C isotopes (d 13 C). Sample ages span 36-71 Ma ($1 sample/0.5 m.y.) for a depth transect of sites in the western North Atlantic (Blake Nose, Ocean Drilling Program Leg 171B, Sites 1052, 1051, and 1050). We use a multitracer approach including redox conditions to investigate export productivity surrounding the global Paleocene d 13 C maximum ($57 Ma). Reducing conditions render most of the bio-Ba record not useful for export productivity interpretations. P and organic C records indicate that regional nutrient and organic C burial were high at $61 and $69 Ma, and low during the Paleocene d 13C maximum, a time of proposed global high relative organic C burial. Observed organic C burial changes at Blake Nose cannot explain this C isotope excursion.

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Depositional Systems

Selley

2000

Applied Sedimentology

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Drilling Blake Nose: the search for evidence of extreme Palaeogene–Cretaceous climates and extraterrestrial events

Cited by 4 publications

References 0 publications

Muted calcareous nannoplankton response at the Middle/Late Eocene Turnover event in the western North Atlantic Ocean

Muted calcareous nannoplankton response at the Middle/Late Eocene Turnover event in the western North Atlantic Ocean

Late Cretaceous and early Paleogene nutrient and paleoproductivity records from Blake Nose, western North Atlantic Ocean

Depositional Systems

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