High-resolution chemostratigraphy of the late Aptian-early Albian oceanic anoxic event (OAE 1b) from the Poggio le Guaine section (Umbria-Marche Basin, central Italy)

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doi: 10.1016/j.palaeo.2015.03.009
Author(s): Sabatino, Nadia; Coccioni, Rodolfo; Salvagio Manta, Daniela; Baudin, François; Vallefuoco, Mattia; Traina, Anna; Sprovieri, Mario
Author Affiliation(s): Primary:
Consiglio Nazionale delle Ricerche, Istituto per l'Ambiente Marino Costiero, Campobello di Mazara, Italy
Universita degli Studi Carlo Bo, Dipartimento di Scienze della Terra, della Vita e dell'Ambiente, Italy
Sorbonne Universités, France
Volume Title: Palaeogeography, Palaeoclimatology, Palaeoecology
Source: Palaeogeography, Palaeoclimatology, Palaeoecology, Vol.426, p.319-333. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0031-0182 CODEN: PPPYAB
Note: In English. 125 refs.; illus., incl. charts, strat. col., sketch map
Summary: An integrated study of multiple geochemical proxies (δ13Ccarb, δ13Corg, TOC, HI, CaCO3, trace elements/Al ratios) of the late Aptian-early Albian oceanic anoxic event (OAE) 1b has been performed on the pelagic sedimentary sequence of Poggio le Guaine (Umbria-Marche Basin, central Italy). A comparison of the newly collected stable isotope carbon curve with the records from the Vocontian Basin (SE France), DSDP Site 545 and Hole 1049C provided a reliable and precise identification of the four main prominent black shale levels (113/Jacob, Kilian, Urbino/Paquier and Leenhardt) that characterize the OAE 1b. The studied record shows an increase in the marine organic carbon accumulation rate, in particular in the 113/Jacob and Urbino/Paquier levels. In the other black shales, TOC values are < 1%, with evidence of degraded marine organic matter. Completely anoxic conditions were never established during the sediment deposition, although evidence of oxygen depletion at the bottom of the basin is clearly documented by the distribution pattern of redox-sensitive trace metals. The results suggest an increase in organic carbon burial rates during the OAE 1b due to the effect of enhanced surface productivity, as supported by a major increase in Ba/Al, and reduced bottom water ventilation. Notably, the Kilian and Urbino/Paquier levels from the PLG section are characterized by the absence of correlative shifts in δ13Ccarb and δ13Corg. The increase in the δ13Corg values in these levels is explained by an increase in the relative contribution of 13C enriched marine planktonic archaeal biomass, while the concomitant negative excursions recorded in the δ13Ccarb could reflect a major contribution of isotopically light terrestrial carbonate ions from increased continental runoff during documented more humid conditions. Abstract Copyright (2015) Elsevier, B.V.
Year of Publication: 2015
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Albian; Algae; Aptian; Atlantic Ocean; Biostratigraphy; Biozones; Blake Nose; Blake Plateau; C-13/C-12; Calcium carbonate; Carbon; Central Italy; Chemostratigraphy; Cretaceous; DSDP Site 545; Deep Sea Drilling Project; Dinoflagellata; Europe; Foraminifera; France; High-resolution methods; IPOD; Invertebrata; Isotope ratios; Isotopes; Italy; Kilian; Leg 171B; Leg 79; Lithostratigraphy; Lower Albian; Lower Cretaceous; Marches Italy; Marne a Fucoidi Formation; Mazagan Plateau; Mesozoic; Microfossils; Morphology; Nannofossils; North Atlantic; O-18/O-16; OAE 1b; ODP Site 1049; Ocean Drilling Program; Oceanic anoxic events; Organic compounds; Oxygen; Palynomorphs; Pelagic environment; Planktonic taxa; Plantae; Poggio le Guaine Mountain; Protista; Southeastern France; Southern Europe; Stable isotopes; Thickness; Total organic carbon; Trace elements; Umbria-Marche Basin; Upper Aptian; Urbino/Paquier level; Vocontian Trough; Western Europe
Coordinates: N433000 N463000 E0070000 E0043000
N300832 N300832 W0760644 W0760644
N333951 N333952 W0092152 W0092153
N433300 N433300 E0123500 E0123500
Record ID: 2015073142
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands