Correction to “Evaluation of the Plio‐Pleistocene astronomical timescale”

Lourens, L. J.; Antonarakou, Assimina; Hilgen, F.J.; Hoof, A.A.M. van; Vergnaud-Grazzini, Colette; Zachariasse, Willem-Jan

doi:10.1029/97pa00321

Cited by 8 publications

(10 citation statements)

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“…Observed abundances of oxiphilic benthic foraminifera support such a trend of bottom water oxygen with water depth and indicate that bottom water anoxia during S1 times may have been spatially restricted and/or of an intermittent nature, particularly at shallower sites (Casford et al, 2003). The Pliocene sapropel has an age of 2.943 Ma (Lourens et al, 1996;Passier et al, 1999a) and is laminated and extremely organic-rich (up to 27 wt% C org ). The presence of speci¢c molecular fossils and the trace metal, Fe and S geochemistry of this sapropel (Bosch et al, 1998;Passier et al, 1999a) provide evidence for its deposition under a euxinic (i.e.…”

Section: Methodsmentioning

confidence: 85%

“…Anderson et al, 2001) and P org analyses (e.g. Mach et al, 1987) and to concentration of refractory detrital organic compounds enriched in P or of in situ synthesized bacterial remains (Ingall and Van Cappellen, 1990). Values of C org /P org above the Red¢eld ratio indicate either a terrestrial source of organic matter (Ruttenberg and Goni, 1997) or preferential regeneration of P relative to C during organic matter decomposition.…”

Section: Introductionmentioning

confidence: 99%

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Controls on phosphorus regeneration and burial during formation of eastern Mediterranean sapropels

2004

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The carbon (C) and phosphorus (P) geochemistry of sapropels from four sites in the eastern Mediterranean Sea was determined to obtain more insight into the role of differences in sediment accumulation rates and bottom water anoxia on P regeneration and burial in sediments. Sediment C org /P org (with org = organic) ratios above Redfield indicate enhanced regeneration of P relative to C from organic matter during formation of the most recent sapropel S1 and a Pliocene sapropel (ODP-site 969E; i-282c). Release of P from Fe-oxides was relatively unimportant. Increased burial of Ca-P (authigenic carbonate fluorapatite and/or biogenic hydroxyapatite) occurred but was of minor importance compared to the enhanced P release from organic matter. For sapropel S1, C org /P org and C org /P reac , (with reac = reactive, defined as the sum of organic, Fe-bound, authigenic and biogenic Ca-P) ratios decreased with increasing sedimentation rate and oxygen exposure and decreasing water depth. Whether the water column in the deep basin was dysoxic/semi-euxinic (S1) or euxinic (Pliocene) does not appear to affect the estimated burial efficiencies of P org and P reac . Enhanced C org burial under the euxinic water column explains the much higher C org /P org and C org /P reac ratios in the Pliocene sapropel (on average V2860 and V760, respectively) compared to sapropel S1 (on average V530 and V160, respectively). ß

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Section: Methodsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Controls on phosphorus regeneration and burial during formation of eastern Mediterranean sapropels

2004

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“…From a stable isotope point of view, the boundary is located in obliquity-related δ 18 O stage MG8 (Shackleton et al, 1995b;Tiedemann et al, 1994), labelled O-176 by Lourens et al (1996a;1997). The correlative δ 18 O minimum is clearly recognizable in the isotopic record of ODP Site 659 (eastern tropical Atlantic) and Site 846 (eastern equatorial Pacific), where it closely corresponds to the Gilbert/Gauss boundary.…”

Section: Correlation Toolsmentioning

confidence: 91%

“…During the last decade, detailed field work carried out on rhythmically bedded sedimentary successions widely outcropping in Sicily and Calabria led to the reconstruction of an ideal stratigraphic composite section which ranges from the base of the Pliocene to the middle Pleistocene (e.g. Hilgen, 1987Hilgen, , 1990Hilgen, , 1991aLangereis and Hilgen, 1991;Zijderveld et al, 1991;Lourens et al, 1996a, b;Lourens et al, 1997). The cyclic limestone-marl and marl-sapropel alternations in this succession were tightly linked to every single fluctuation of the Earth's precessional parameter (in turn modulated by orbital eccentricity), resulting in a continuous astrochronology of the lithostratigraphic record (Hilgen, 1991a, b).…”

Section: Biomagnetostratigraphy Astrocyclostratigraphy and Isotope mentioning

confidence: 99%

The Global Standard Stratotype-section and Point (GSSP) of the Piacenzian Stage (Middle Pliocene)

Castradori¹,

Rio²,

Hilgen³

et al. 1998

Episodes

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“…Eastern Mediterranean sapropels are thought to be the result of eccentricity modulation of precession minima (Hilgen, 1991;Lourens et al, 1997) that enhanced monsoon activity and freshwater discharge from North African rivers (Hennekam et al, 2014;Marino et al, 2009;Rohling, Cane, et al, 2002; Rossignol-Strick (Martrat et al, 2014). (2) MD95-2043 (Cacho et al, 1999, Martrat et al, 2004.…”

Section: Introductionmentioning

confidence: 99%

The Postglacial Isotopic Record of Intermediate Water Connects Mediterranean Sapropels and Organic‐Rich Layers

Incarbona

Sprovieri

2020

Paleoceanog and Paleoclimatol

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Carbon-rich layers exist at both sides of the Mediterranean Sea sedimentary record and are called sapropels and organic rich layers (ORLs), respectively, in the eastern and western basins. They have different levels of organic carbon accumulation and seafloor oxygen deprivation. The most recent sapropel and ORL depositions have a different timing, approximately 10.8-6.1 and 14.5-9.0 ka, respectively. Here we investigate oxygen isotopic records of three foraminifera species that occupy different habitats within the Sicily Channel water column since~12.0 ka, thus in the sill between the eastern and western Mediterranean basins. These data are ice volume corrected, to get information on water masses density variability, and are accompanied by benthic foraminifera δ 13 C measurements to establish Sicily Channel seafloor ventilation. Our results, and the comparison with other chronologically well-constrained Mediterranean records, highlight the connection of the two subbasins due to monsoon activity. The end of the maximum Nile River flooding at~9.2 ka, and eastern Mediterranean seafloor reventilation above 1,800-1,500 m depth at~8.2 and 7.2 ka, left a clear signature in the intermediate water isotopic record of the Sicily Channel. Concurrently, the western Mediterranean deep water circulation experienced a significant recovery after a long period of slowdown. We argue that African monsoon weakening was transmitted into the western Mediterranean, through the intermediate layer of circulation, where deep water formation took place and brought oxygen to the seafloor.

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Correction to “Evaluation of the Plio‐Pleistocene astronomical timescale”

Cited by 8 publications

References 0 publications

Controls on phosphorus regeneration and burial during formation of eastern Mediterranean sapropels

Controls on phosphorus regeneration and burial during formation of eastern Mediterranean sapropels

The Global Standard Stratotype-section and Point (GSSP) of the Piacenzian Stage (Middle Pliocene)

The Postglacial Isotopic Record of Intermediate Water Connects Mediterranean Sapropels and Organic‐Rich Layers

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