The Eocene Thermal Maximum 3; reading the environmental perturbations at Gubbio (Italy)

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doi: 10.1130/2016.2524(11)
Author(s): Frontalini, Fabrizio; Coccioni, Rodolfo; Catanzariti, Rita; Jovane, Luigi; Savian, Jairo F.; Sprovieri, Mario
Author Affiliation(s): Primary:
Universita degli Studi di Urbino "Carlo Bo", Dipartimento di Scienze Pure e Applicate, Urbino, Italy
Other:
CNR, Istituto di Geoscienze e Georisorse, Italy
Universidade de Sao Paulo, Brazil
Universidade Federal do Rio Grande do Sul, Brazil
CNR, Istituto Ambiente Marino Costiero, Italy
Volume Title: Stratigraphic record of Gubbio; integrated stratigraphy of the Late Cretaceous-Paleogene Umbria-Marche pelagic basin
Volume Author(s): Menichetti, Marco, editor; Coccioni, Rodolfo; Montanari, Alessandro
Source: The stratigraphic record of Gubbio; integrated stratigraphy of the Late Cretaceous-Paleogene Umbria-Marche pelagic basin, edited by Marco Menichetti, Rodolfo Coccioni and Alessandro Montanari. Special Paper - Geological Society of America, Vol.524, p.161-175. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0072-1077 CODEN: GSAPAZ
Note: In English. 85 refs.; illus., incl. sketch map
Summary: The Paleocene-early Eocene interval is punctuated by a series of transient warming events known as hyperthermals that have been associated with changes in the carbon isotope composition of the ocean-atmosphere system. Here we present and discuss a detailed record of calcareous nannofossil and foraminiferal assemblages coupled with high-resolution geochemical, isotopic, and environmental magnetic records across the middle Ypresian at the Contessa Road section (Gubbio, Italy). This allows characterization of the Eocene Thermal Maximum 3 (ETM3, K or X) and recognition of four minor (I1, I2, J, L) hyperthermals. At the Contessa Road section, the ETM3 is marked by short-lived negative excursions in both δ13C and δ18O, pronounced changes in rock magnetic properties, and calcium carbonate reduction. These changes coupled with the moderate to low state of preservation of calcareous nannofossils and planktonic foraminifera, higher FI and agglutinated foraminifera values, along with a lower P/(P + B) ratio (P-planktonic; B-benthic) and coarse fractions provide evidence of enhanced carbonate dissolution during the ETM3. A marked shift toward warmer and more oligotrophic conditions has been inferred that suggests unstable and perturbed environmental conditions both in the photic zone and at the seafloor.
Year of Publication: 2016
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Assemblages; Atlantic Ocean; Benthic taxa; Biota; C-13/C-12; Calcium carbonate; Carbon; Carbonates; Cenozoic; Climate change; Concentration; Correlation; DSDP Site 213; DSDP Site 550; DSDP Site 577; Deep Sea Drilling Project; Demerara Rise; East Pacific; Ecosystems; Environmental effects; Eocene; Eocene Thermal Maximum 1; Equatorial Atlantic; Europe; Foraminifera; Gubbio Italy; Hyperthermal events; IPOD; Indian Ocean; Invertebrata; Isotope ratios; Isotopes; Italy; Leg 199; Leg 207; Leg 208; Leg 22; Leg 80; Leg 86; Lower Eocene; Magnetic properties; Marine environment; Microfossils; Nannofossils; North Atlantic; North Pacific; Northeast Pacific; Northwest Atlantic; Northwest Pacific; O-18/O-16; ODP Site 1215; ODP Site 1258; ODP Site 1262; ODP Site 1263; ODP Site 1264; ODP Site 1265; ODP Site 1266; ODP Site 1267; Ocean Drilling Program; Oligotrophic environment; Oxygen; Pacific Ocean; Paleocene-Eocene Thermal Maximum; Paleoclimatology; Paleoecology; Paleoenvironment; Paleogene; Perugia Italy; Planktonic taxa; Plantae; Preservation; Protista; Reduction; Shatsky Rise; Size distribution; Solution; South Atlantic; Southern Europe; Species diversity; Stable isotopes; Tertiary; Tethys; Umbria Italy; Variations; Walvis Ridge; West Atlantic; West Pacific; Ypresian
Coordinates: N432247 N432247 E0133350 E0133350
Record ID: 2016094096
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States