Isotope ratios of smectites, calcites and whole rocks from DSDP Legs 51 and 52, Atlantic Ocean
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
1981
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| _version_ | 1867170453372534784 |
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| author | Staudigel, Hubert Muehlenbachs, Karlis Richardson, Stephen H Hart, Stanley R |
| author_facet | Staudigel, Hubert Muehlenbachs, Karlis Richardson, Stephen H Hart, Stanley R |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Delta180 and 87Sr/86Sr isotopic data from smectites, calcites, and whole rocks, together with published isotopic age determinations, alkali element concentration data and petrographic observations suggest a sequential model of ocean floor alteration. The early stage lasts about 3 m.y. and is characterized by palagonite and smectite formation, and solutions with a large basaltic component, increasing with temperature which varies from 15° to 80° C at DSDP site 418A. Most carbonates are deposited after this stage from solutions with a negligible basaltic Sr component and temperatures of 15° to 40° C. Water of seawater Sr and O isotopic composition is shown to percolate to at least 500 m into the basaltic basement. No evidence was found for continuing exchange of strontium or oxygen after 3 m.y. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_667373 |
| institution | PANGAEA |
| language | en |
| publishDate | 1981 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Isotope ratios of smectites, calcites and whole rocks from DSDP Legs 51 and 52, Atlantic Ocean Staudigel, Hubert Muehlenbachs, Karlis Richardson, Stephen H Hart, Stanley R 51-417_Site; 51-417A; 52-417D; 52-418A; 53-418A; COMPCORE; Composite Core; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg51; Leg52; Leg53; North Atlantic/CONT RISE Delta180 and 87Sr/86Sr isotopic data from smectites, calcites, and whole rocks, together with published isotopic age determinations, alkali element concentration data and petrographic observations suggest a sequential model of ocean floor alteration. The early stage lasts about 3 m.y. and is characterized by palagonite and smectite formation, and solutions with a large basaltic component, increasing with temperature which varies from 15° to 80° C at DSDP site 418A. Most carbonates are deposited after this stage from solutions with a negligible basaltic Sr component and temperatures of 15° to 40° C. Water of seawater Sr and O isotopic composition is shown to percolate to at least 500 m into the basaltic basement. No evidence was found for continuing exchange of strontium or oxygen after 3 m.y. |
| title | Isotope ratios of smectites, calcites and whole rocks from DSDP Legs 51 and 52, Atlantic Ocean |
| topic | 51-417_Site; 51-417A; 52-417D; 52-418A; 53-418A; COMPCORE; Composite Core; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg51; Leg52; Leg53; North Atlantic/CONT RISE |
| url | https://doi.org/10.1594/PANGAEA.667373 |