Ruhlin, Douglas E; Owen, Robert M (1986): Contents and accumulation rates of the rare earth and some other elements in metalliferous sediments from DSDP Hole 92-598 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.707278, Supplement to: Ruhlin, DE; Owen, RM (1986): The rare earth element geochemistry of hydrothermal sediments from the East Pacific Rise: Examination of a seawater scavenging mechanism. Geochimica et Cosmochimica Acta, 50(3), 393-400, https://doi.org/10.1016/0016-7037(86)90192-4
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Abstract:
The sediments recovered during DSDP Leg 92 (Site 598) include a complete 16 m.y. record of hydrothermal sedimentation along the western flank of the East Pacific Rise at 19°S. Fifty samples from this sediment column were analyzed to test the hypothesis that the REE composition of the hydrothermal component is primarily acquired via scavenging from seawater. Site 598 provides an ideal sample suite for this purpose: the sediments are lithologically “simple,” primarily consisting of a mixture of hydrothermal materials and biogenous carbonates; the composition of the hydrothermal component is essentially constant through space and time; and the sediments have undergone minimal diagenetic alteration.
The following observations suggest the above-stated hypothesis is true. The Ce anomaly as well as key indices of light and heavy REE behavior all show that the REE pattern of hydrothermal sediments approaches that of seawater with increasing paleodistance from the rise crest. Moreover, shale-normalized REE patterns are similar to that of seawater, varying only in absolute REE content: the REE content increases with distance from the paleo-rise crest and exhibits a pronounced increase in sediments deposited below the paleolysocline. Based on significant correlative relationships between paleodistance from the rise crest and both the concentration and mass accumulation rates (MARs) of REEs and Fe, we conclude the REEs in the hydrothermal component are derived from the interaction of seawater and Fe in the hydrothermal plume.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: -19.004700 * Longitude: -124.676800
Date/Time Start: 1983-03-17T00:00:00 * Date/Time End: 1983-03-17T00:00:00
Event(s):
92-598 * Latitude: -19.004700 * Longitude: -124.676800 * Date/Time: 1983-03-17T00:00:00 * Elevation: -3699.0 m * Penetration: 52.4 m * Recovery: 41.2 m * Location: South Pacific Ocean * Campaign: Leg92 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 52.4 m cored; 0 m drilled; 78.7 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Ruhlin, DE; Owen, RM (1986): (Table 2) Chemical composition of metalliferous sediments from DSDP Hole 92-598. https://doi.org/10.1594/PANGAEA.707255
- Ruhlin, DE; Owen, RM (1986): (Table 3) Accumulation rates of iron the rare earth elements in metalliferous sediments from DSDP Hole 92-598. https://doi.org/10.1594/PANGAEA.707277