Recent Advances in Research on Terrestrial and Marine Sequences From the Mid-Cretaceous Oceanic Anoxic Events (OAEs)
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چکیده
منابع مشابه
Oceanic anoxic events and plankton evolution: Biotic response to tectonic forcing during the mid-Cretaceous
[1] Mid-Cretaceous (Barremian-Turonian) plankton preserved in deep-sea marl, organic-rich shale, and pelagic carbonate hold an important record of how the marine biosphere responded to shortand long-term changes in the ocean-climate system. Oceanic anoxic events (OAEs) were short-lived episodes of organic carbon burial that are distinguished by their widespread distribution as discrete beds of ...
متن کاملMid-Cretaceous carbon cycle perturbations and Oceanic Anoxic Events recorded in southern Tibet
The organic carbon isotope (δ13Corg) curve for ~1.7-km-thick mid-Cretaceous strata of the Chaqiela section in Gamba area, southern Tibet is presented in this study. C-isotopic chemostratigraphic correlation combined with biostratigraphic constraints show that the Chaqiela section spans early Aptian through early Campanian period, and that almost all of the carbon cycle perturbations and Oceanic...
متن کاملMassive expansion of marine archaea during a mid-Cretaceous oceanic anoxic event.
Biogeochemical and stable carbon isotopic analysis of black-shale sequences deposited during an Albian oceanic anoxic event (approximately 112 million years ago) indicate that up to 80 weight percent of sedimentary organic carbon is derived from marine, nonthermophilic archaea. The carbon-13 content of archaeal molecular fossils indicates that these archaea were living chemoautotrophically. The...
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a State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China b Department of Earth Sciences, Nanjing University, Nanjing 210093, China c Department of Geodynamics and Sedimentology, University of Vienna, A-1090 Vienna, Austria d University of Tulsa, 149 West Ridge Road, Cleveland, OK 74020, USA e Department of Geological Sciences, ...
متن کاملSeawater Strontium Isotopes, Oceanic Anoxic Events, and Seafloor Hydrothermal Activity in the Jurassic and Cretaceous
There were three negative seawater strontium-isotope excursions (shifts to lower Sr/Sr values) during the Jurassic and Cretaceous that were of relatively short duration (5-13 my) and showed a relatively quick recovery to pre-excursion Sr/Sr ratios. These excursions occurred in the Pliensbachian-Toarcian (Early Jurassic), Aptian-Albian, and Cenomanian-Santonian (Early and Late Cretaceous respect...
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ژورنال
عنوان ژورنال: Scientific Drilling
سال: 2006
ISSN: 1816-3459
DOI: 10.5194/sd-2-50-2006