Environmental consequences of Ontong Java Plateau and Kerguelen Plateau volcanism

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doi: 10.1130/2015.2511(15)
Author(s): Erba, Elisabetta; Duncan, Robert A.; Bottini, Cinzia; Tiraboschi, Daniele; Weissert, Helmut; Jenkyns, Hugh C.; Malinverno, Alberto
Author Affiliation(s): Primary:
Universita di Milano, Department of Earth Sciences, Milan, Italy
Other:
Oregon State University, United States
ETH Zürich, Switzerland
University of Oxford, United Kingdom
Lamont-Doherty Earth Observatory, United States
Volume Title: Origin, evolution and environmental impact of oceanic large igneous provinces
Volume Author(s): Neal, Clive R., editor; Sager, William W.; Sano, Takashi; Erba, Elisabetta
Source: The origin, evolution and environmental impact of oceanic large igneous provinces, edited by Clive R. Neal, William W. Sager, Takashi Sano and Elisabetta Erba. Special Paper - Geological Society of America, Vol.511, p.271-303. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0072-1077 CODEN: GSAPAZ
Note: In English. 246 refs.Online First; illus., incl. 1 table, sketch map
Summary: The mid-Cretaceous was marked by emplacement of large igneous provinces (LIPs) that formed gigantic oceanic plateaus, affecting ecosystems on a global scale, with biota forced to face excess CO2 resulting in climate and ocean perturbations. Volcanic phases of the Ontong Java Plateau (OJP) and the southern Kerguelen Plateau (SKP) are radiometrically dated and correlate with paleoenvironmental changes, suggesting causal links between LIPs and ecosystem responses. Aptian biocalcification crises and recoveries are broadly coeval with C, Pb, and Os isotopic anomalies, trace metal influxes, global anoxia, and climate changes. Early Aptian greenhouse or supergreenhouse conditions were followed by prolonged cooling during the late Aptian, when OJP and SKP developed, respectively. Massive volcanism occurring at equatorial versus high paleolatitudes and submarine versus subaerial settings triggered very different climate responses but similar disruptions in the marine carbonate system. Excess CO2 arguably induced episodic ocean acidification that was detrimental to marine calcifiers, regardless of hot or cool conditions. Global anoxia was reached only under extreme warming, whereas cold conditions kept the oceans well oxygenated even at times of intensified fertility. The environmental disruptions attributed to the OJP did not trigger a mass extinction: rock-forming nannoconids and benthic communities underwent a significant decline during Oceanic Anoxic Event (OAE) 1a, but recovered when paroxysmal volcanism finished. Extinction of many planktonic foraminiferal and nannoplankton taxa, including most nannoconids, and most aragonitic rudists in latest Aptian time was likely triggered by severe ocean acidification. Upgraded dating of paleoceanographic events, improved radiometric ages of the OJP and SKP, and time-scale revision are needed to substantiate the links between magmatism and paleoenvironmental perturbations.
Year of Publication: 2015
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 03 Geochronology; 12 Stratigraphy, Historical Geology and Paleoecology; Absolute age; Ar/Ar; Biostratigraphy; C-13/C-12; Carbon; Carbon dioxide; Chemostratigraphy; Chronostratigraphy; Climate change; Cretaceous; DSDP Site 167; DSDP Site 463; Deep Sea Drilling Project; East Pacific; Equatorial Pacific; Foraminifera; IPOD; Indian Ocean; Invertebrata; Isotope ratios; Isotopes; Kerguelen Plateau; Large igneous provinces; Leg 143; Leg 17; Leg 62; Lithostratigraphy; Lower Cretaceous; Magnetostratigraphy; Major elements; Mesozoic; Microfossils; Mid-Pacific Mountains; Middle Cretaceous; Minor elements; North Pacific; Northeast Pacific; Northwest Pacific; ODP Site 866; Ocean Drilling Program; Oceanic anoxic events; Ontong Java Plateau; Pacific Ocean; Paleo-oceanography; Paleoecology; Paleoenvironment; Protista; Resolution Seamount; Sedimentary rocks; Stable isotopes; Trace elements; Volcanism; West Pacific
Coordinates: N212101 N212101 E1744004 E1744004
N070406 N070406 W1764930 W1764930
N211957 N211958 E1741853 E1741850
Record ID: 2015032338
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States