Multi-proxy assessment of recent regional-scale events recorded in Southern Gulf of Mexico sediments
| Autor: | Ana Carolina Ruiz-Fernández, David J. Hollander, Patrick Schwing, Rebekka A. Larson, Gregg R. Brooks, J.N. Fillingham, M.L. Machain-Castillo, Joan-Albert Sanchez-Cabeza |
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| Rok vydání: | 2021 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences biology Sediment Geology Sedimentation 010502 geochemistry & geophysics Oceanography biology.organism_classification Snow 01 natural sciences Foraminifera chemistry.chemical_compound Volcano chemistry Geochemistry and Petrology Benthic zone Petroleum Sedimentary rock 0105 earth and related environmental sciences |
| Zdroj: | Marine Geology. 434:106434 |
| ISSN: | 0025-3227 |
| Popis: | The Ixtoc-1 oil spill (1979–80) released 475 million liters of petroleum into the Southern Gulf of Mexico (sGoM) likely causing Marine Oil Snow Sedimentation and Flocculent Accumulation (MOSSFA) to occur. A multiproxy approach including short-lived radioisotopes (210Pbxs), benthic foraminifera stable isotopes (δ13CCaCO3), and volcanic sediment grains was used to investigate regional events (e.g. oil spills and volcanic eruptions) recorded in sedimentary records. Depleted δ13CCaCO3 from 1979 to 80 outside of natural variability most likely results from petrogenic carbon deposition 100–250 km west of Ixtoc-1, possibly associated with MOSSFA. An event, characterized by increased volcanic input, depleted δ13CCaCO3, and increased mass accumulation rates was consistent with the El Chichon eruption (1982) 80–100 km north of Ixtoc-1. Many factors confound the uniform distribution and preservation of these events in the sGoM. However, a multiproxy approach may aid to distinguish multiple events in the sGoM sedimentary record. |
| Databáze: | OpenAIRE |
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