(Table 2) Mg/Ca and Sr/Ca composition of planktonic foraminifera from ODP Hole 143-865B
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| Autores principales: | , , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2003
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| _version_ | 1867170980227448832 |
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| author | Tripati, Aradhna K Delaney, Margaret Lois Zachos, James C Anderson, Linda Davis Kelly, Daniel Clay Elderfield, Henry |
| author_facet | Tripati, Aradhna K Delaney, Margaret Lois Zachos, James C Anderson, Linda Davis Kelly, Daniel Clay Elderfield, Henry |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | To understand the climate dynamics of hypothesized past greenhouse intervals, it is essential to constrain tropical sea-surface temperatures (SST), yet existing proxy records give conflicting results. Here we present the first Mg/Ca-based study of pre-Quaternary SST and investigate early Paleogene (late Paleocene through late middle Eocene; 58.6-39.8 Ma) tropical temperatures, using planktonic foraminifera belonging to the genus Morozovella from Ocean Drilling Program Site 865 on Allison Guyot (western central equatorial Pacific Ocean). Calcification temperatures similar to or warmer than modern tropical SST are calculated using a range of assumptions regarding diagenesis, temperature calibration, and seawater Mg/Ca. Long-term warming is observed into the early Eocene (54.8-49.0 Ma), with peak SST between 51 and 48 Ma and rapid cooling of 4°C beginning at 48 Ma. These findings are inconsistent with the d18O-based SST previously estimated for this site. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_841333 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 2) Mg/Ca and Sr/Ca composition of planktonic foraminifera from ODP Hole 143-865B Tripati, Aradhna K Delaney, Margaret Lois Zachos, James C Anderson, Linda Davis Kelly, Daniel Clay Elderfield, Henry 143-865B; AGE; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; ICP-OES, Inductively coupled plasma - optical emission spectrometry; Joides Resolution; Leg143; Morozovella aragonensis, Magnesium/Calcium ratio; Morozovella aragonensis, Strontium/Calcium ratio; Morozovella lehneri, Magnesium/Calcium ratio; Morozovella lehneri, Strontium/Calcium ratio; Morozovella spinulosa, Magnesium/Calcium ratio; Morozovella spinulosa, Strontium/Calcium ratio; Morozovella subbotinae, Magnesium/Calcium ratio; Morozovella subbotinae, Strontium/Calcium ratio; Morozovella velascoensis, Magnesium/Calcium ratio; Morozovella velascoensis, Strontium/Calcium ratio; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label To understand the climate dynamics of hypothesized past greenhouse intervals, it is essential to constrain tropical sea-surface temperatures (SST), yet existing proxy records give conflicting results. Here we present the first Mg/Ca-based study of pre-Quaternary SST and investigate early Paleogene (late Paleocene through late middle Eocene; 58.6-39.8 Ma) tropical temperatures, using planktonic foraminifera belonging to the genus Morozovella from Ocean Drilling Program Site 865 on Allison Guyot (western central equatorial Pacific Ocean). Calcification temperatures similar to or warmer than modern tropical SST are calculated using a range of assumptions regarding diagenesis, temperature calibration, and seawater Mg/Ca. Long-term warming is observed into the early Eocene (54.8-49.0 Ma), with peak SST between 51 and 48 Ma and rapid cooling of 4°C beginning at 48 Ma. These findings are inconsistent with the d18O-based SST previously estimated for this site. |
| title | (Table 2) Mg/Ca and Sr/Ca composition of planktonic foraminifera from ODP Hole 143-865B |
| topic | 143-865B; AGE; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; ICP-OES, Inductively coupled plasma - optical emission spectrometry; Joides Resolution; Leg143; Morozovella aragonensis, Magnesium/Calcium ratio; Morozovella aragonensis, Strontium/Calcium ratio; Morozovella lehneri, Magnesium/Calcium ratio; Morozovella lehneri, Strontium/Calcium ratio; Morozovella spinulosa, Magnesium/Calcium ratio; Morozovella spinulosa, Strontium/Calcium ratio; Morozovella subbotinae, Magnesium/Calcium ratio; Morozovella subbotinae, Strontium/Calcium ratio; Morozovella velascoensis, Magnesium/Calcium ratio; Morozovella velascoensis, Strontium/Calcium ratio; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label |
| url | https://doi.org/10.1594/PANGAEA.841333 |