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Published byAron Mathews Modified over 5 years ago
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The Role of Reactive Phosphorus Generation in Cretaceous Anoxic Events
Kristina L. Faul, Chemistry Department, Mills College, Oakland, CA 94613 High oceanic productivity and ocean anoxia are often cited as causes of high organic carbon burial during Cretaceous Oceanic Anoxic Events (OAEs) My goal is to test whether phosphorus is preferentially regenerated from OAE sediments, and the role phosphorus generation might play in fueling these high productivity events. Site Locations: Demererra Rise, western equatorial Atlantic Blake Nose, western North Atlantic Preliminary Data from Blake Nose: Phosphorus Concentrations, MARs, and C to P Ratios ~OAE 1d ~OAE 1b Preliminary data from Blake Nose indicates that P deposition could be elevated during OAEs (see above). These sites have Cretaceous age organic C to reactive P ratios (at right), that are lower than modern ocean organic C to reactive P ratios, possibly indicating preferential regeneration of reactive P during Cretaceous anoxic events.
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