The Paleocene-Eocene boundary in ODP Leg 208 sites
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| Sprache: | en |
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PANGAEA
2005
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| author | Zachos, James C Röhl, Ursula Schellenberg, Stephen A Sluijs, Appy Hodell, David A Kelly, Daniel Clay Thomas, Ellen Nicolo, Micah J Raffi, Isabella Lourens, Lucas Joost McCarren, H Kroon, Dick |
| author_facet | Zachos, James C Röhl, Ursula Schellenberg, Stephen A Sluijs, Appy Hodell, David A Kelly, Daniel Clay Thomas, Ellen Nicolo, Micah J Raffi, Isabella Lourens, Lucas Joost McCarren, H Kroon, Dick |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Paleocene-Eocene thermal maximum (PETM) has been attributed to the rapid release of ~2000 * 10**9 metric tons of carbon in the form of methane. In theory, oxidation and ocean absorption of this carbon should have lowerd deep-sea pH, thereby triggering a rapid (<10,000-year) shoaling of the calcite compensation depth (CCD), followed by gradual recovery. Here we present geochemical data from five new South Atlantic deep-sea sections that constrain the timing and extent of massive sea-floor carbonate dissolution coincident with the PETM. The sections, from between 2.7 and 4.8 kilometers water depth, are marked by a prominent clay layer, the character of which indicates that the CCD shoaled rapidly (<10,000 years) by more than 2 kilometers and recovered gradually (>100,000 years). These findings indicate that a large mass of carbon (>>2000 * 10**9 metric tons of carbon) dissolved in the ocean at the Paleocene-Eocene boundary and that permanent sequestration of this carbon occurred through silicate weathering feedback. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_772051 |
| institution | PANGAEA |
| language | en |
| publishDate | 2005 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | The Paleocene-Eocene boundary in ODP Leg 208 sites Zachos, James C Röhl, Ursula Schellenberg, Stephen A Sluijs, Appy Hodell, David A Kelly, Daniel Clay Thomas, Ellen Nicolo, Micah J Raffi, Isabella Lourens, Lucas Joost McCarren, H Kroon, Dick 208-1262; 208-1262A; 208-1263; 208-1263C; 208-1265; 208-1265A; 208-1266; 208-1266C; 208-1267A; 208-1267B; COMPCORE; Composite Core; DRILL; Drilling/drill rig; Joides Resolution; Leg208; Ocean Drilling Program; ODP; South Atlantic Ocean; Walvis Ridge, Southeast Atlantic Ocean The Paleocene-Eocene thermal maximum (PETM) has been attributed to the rapid release of ~2000 * 10**9 metric tons of carbon in the form of methane. In theory, oxidation and ocean absorption of this carbon should have lowerd deep-sea pH, thereby triggering a rapid (<10,000-year) shoaling of the calcite compensation depth (CCD), followed by gradual recovery. Here we present geochemical data from five new South Atlantic deep-sea sections that constrain the timing and extent of massive sea-floor carbonate dissolution coincident with the PETM. The sections, from between 2.7 and 4.8 kilometers water depth, are marked by a prominent clay layer, the character of which indicates that the CCD shoaled rapidly (<10,000 years) by more than 2 kilometers and recovered gradually (>100,000 years). These findings indicate that a large mass of carbon (>>2000 * 10**9 metric tons of carbon) dissolved in the ocean at the Paleocene-Eocene boundary and that permanent sequestration of this carbon occurred through silicate weathering feedback. |
| title | The Paleocene-Eocene boundary in ODP Leg 208 sites |
| topic | 208-1262; 208-1262A; 208-1263; 208-1263C; 208-1265; 208-1265A; 208-1266; 208-1266C; 208-1267A; 208-1267B; COMPCORE; Composite Core; DRILL; Drilling/drill rig; Joides Resolution; Leg208; Ocean Drilling Program; ODP; South Atlantic Ocean; Walvis Ridge, Southeast Atlantic Ocean |
| url | https://doi.org/10.1594/PANGAEA.772051 |