10.1594/PANGAEA.667373
Staudigel, Hubert
Hubert
Staudigel
Muehlenbachs, Karlis
Karlis
Muehlenbachs
Richardson, Stephen H
Stephen H
Richardson
Hart, Stanley R
Stanley R
Hart
Isotope ratios of smectites, calcites and whole rocks from DSDP Legs 51 and 52, Atlantic Ocean
PANGAEA
1981
Composite Core
Drilling/drill rig
Leg51
Leg52
Leg53
Glomar Challenger
Deep Sea Drilling Project (DSDP)
1976-12-02T00:00:00/1977-03-15T00:00:00
en
Supplementary Publication Series of Datasets
10.1007/BF00636518
10 datasets
application/zip
Creative Commons Attribution 3.0 Unported
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.
Supplement to: Staudigel, Hubert; Muehlenbachs, Karlis; Richardson, Stephen H; Hart, Stanley R (1981): Agents of low temperature ocean crust alteration. Contributions to Mineralogy and Petrology, 77(2), 150-157
-68.0573
-68.0413
25.035
25.1115
North Atlantic/CONT RISE