globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.03.009
论文题名:
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)
作者: Sabatino N.; Coccioni R.; Salvagio Manta D.; Baudin F.; Vallefuoco M.; Traina A.; Sprovieri M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 426
起始页码: 319
结束页码: 333
语种: 英语
英文关键词: Aptian/Albian OAE1b ; Carbon-isotope stratigraphy ; Elemental geochemistry ; Kilian level ; Organic matter geochemistry ; Urbino/Paquier level
英文摘要: 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. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68958
Appears in Collections:过去全球变化的重建

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作者单位: Istituto per l'Ambiente Marino Costiero, Consiglio Nazionale delle Ricerche (IAMC-CNR), Capo Granitola, Via del Mare 3, Campobello di Mazara (Tp), Italy; Dipartimento di Scienze della Terra, Della Vita e dell'Ambiente, Università degli Studi Carlo Bo, Campo Scientifico E. Mattei, Localita' Crocicchia, Urbino, Italy; Institut des Sciences de la Terre de Paris, Sorbonne Universités, UPMC-Univ. Paris 06, CNRS, UMR 7193, 4 place Jussieu, Paris Cedex 05, France; Istituto per l'Ambiente Marino Costiero, Consiglio Nazionale delle Ricerche (IAMC-CNR), Calata Porta di Massa (Interno Porto di Napoli), Napoli, Italy

Recommended Citation:
Sabatino N.,Coccioni R.,Salvagio Manta D.,et al. 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)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,426
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