Geochemistry of oceanic anoxic events

HC Jenkyns - Geochemistry, Geophysics, Geosystems, 2010 - Wiley Online Library
Oceanic anoxic events (OAEs) record profound changes in the climatic and
paleoceanographic state of the planet and represent major disturbances in the global …

The organic geochemistry of asphaltenes and occluded biomarkers

LR Snowdon, JK Volkman, Z Zhang, G Tao, P Liu - Organic Geochemistry, 2016 - Elsevier
Asphaltenes are heteroatom rich macromolecules thought to be mainly derived from the
early breaking of covalent bonds in kerogen and thus have been considered to be a lower …

Carbon-isotope record of the Early Jurassic (Toarcian) Oceanic Anoxic Event from fossil wood and marine carbonate (Lusitanian Basin, Portugal)

SP Hesselbo, HC Jenkyns, LV Duarte… - Earth and Planetary …, 2007 - Elsevier
The Toarcian Oceanic Anoxic Event (OAE) in the Early Jurassic (∼ 183 Ma ago) was
characterized by widespread near-synchronous deposition of organic-rich shales in marine …

Iodine to calcium ratios in marine carbonate as a paleo-redox proxy during oceanic anoxic events

Z Lu, HC Jenkyns, REM Rickaby - Geology, 2010 - pubs.geoscienceworld.org
Periods of globally distributed extreme oxygen depletion, so-called oceanic anoxic events
(OAEs), have been recognized in the Mesozoic geological record and appear to be …

A carbon-isotope perturbation at the Pliensbachian–Toarcian boundary: evidence from the Lias Group, NE England

K Littler, SP Hesselbo, HC Jenkyns - Geological Magazine, 2010 - cambridge.org
A perturbation in the carbon-isotope record at the time of the Pliensbachian–Toarcian
boundary (~ 184 Ma) in the Early Jurassic is reported, based on new data from Yorkshire …

Organic geochemistry of the early Toarcian oceanic anoxic event in Hawsker Bottoms, Yorkshire, England

KL French, J Sepúlveda, J Trabucho-Alexandre… - Earth and Planetary …, 2014 - Elsevier
A comprehensive organic geochemical investigation of the Hawsker Bottoms outcrop
section in Yorkshire, England has provided new insights about environmental conditions …

A global perturbation to the sulfur cycle during the Toarcian Oceanic Anoxic Event

BC Gill, TW Lyons, HC Jenkyns - Earth and Planetary Science Letters, 2011 - Elsevier
The Mesozoic Era was punctuated by intervals of widespread anoxia within the ocean,
termed oceanic anoxic events or OAEs. The chemostratigraphy of these intervals also …

Structural characterization of kerogen in 3.4 Ga Archaean cherts from the Pilbara Craton, Western Australia

CP Marshall, GD Love, CE Snape, AC Hill… - Precambrian …, 2007 - Elsevier
Hydrogen-lean kerogen (atomic H/C< 0.46) isolated from the 3.4 Ga Strelley Pool Chert in
the North Pole area, Pilbara Craton, Western Australia, were studied by vibrational …

Microbes, mud and methane: cause and consequence of recurrent E arly J urassic anoxia following the end‐T riassic mass extinction

B Van de Schootbrugge, A Bachan, G Suan… - …, 2013 - Wiley Online Library
The end‐T riassic mass extinction (c. 201.6 Ma) was one of the five largest mass‐extinction
events in the history of animal life. It was also associated with a dramatic, long‐lasting …

[HTML][HTML] An Early Jurassic (Sinemurian–Toarcian) stratigraphic framework for the occurrence of organic matter preservation intervals (OMPIs)

RL Silva, LV Duarte, GD Wach, M Ruhl, D Sadki… - Earth-Science …, 2021 - Elsevier
Lower Jurassic sedimentary successions in the Atlantic margin basins include several
organic-rich intervals, some with source rock potential; time-equivalent units are also …