Hart, Stanley R; Staudigel, Hubert (1983): (Table 1) K, Rb, Cs, Sr, and 87Sr/86Sr in vein materials from DSDP Hole 72-516F [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.811426, Supplement to: Hart, SR; Staudigel, H (1983): Age of hydrothermal circulation on the Rio Grande Rise: Deep Sea Drilling Project Site 516. In: Barker, PF; Carlson, RL; Johnson, DA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 72, 471-474, https://doi.org/10.2973/dsdp.proc.72.117.1983
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Published: 1983 (exact date unknown) • DOI registered: 2013-06-10
Abstract:
A well-constrained Rb/Sr isochron of secondary celadonites and carbonate from DSDP Hole 516F yields an age of 70.1 ± 1.6 Ma. This age is younger than the age of crust formation (about 82 Ma) and may provide evidence for a shortlived hydrothermal event on the Rio Grande Rise caused by a phase of off-ridge volcanism. The initial 87Sr/86Sr ratios of the celandonites and carbonate are lower than the contemporaneous seawater and indicate that the dissolved load of the hydrous solutions contains approximately 2% of basaltic component. K, Rb, and Cs contents in Hole 516F celadonites are similar to corresponding phases from DSDP Hole 417A, indicating that the upper crust at this site may represent a significant sink for seawater alkalies. The alkali ratios K/Rb and K/Cs of Hole 516F celadonites are also similar to the ratios in celadonites from 108-Ma-old crust at DSDP Holes 417 and 418. This correspondence shows that the K/Rb and K/Cs ratios in seawater remained essentially constant during the Cretaceous, from 108 to 70 Ma.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: -30.276500 * Longitude: -35.285000
Date/Time Start: 1980-03-11T00:00:00 * Date/Time End: 1980-03-11T00:00:00
Minimum DEPTH, sediment/rock: 3.7 m * Maximum DEPTH, sediment/rock: 4.9 m
Event(s):
72-516F * Latitude: -30.276500 * Longitude: -35.285000 * Date/Time: 1980-03-11T00:00:00 * Elevation: -1313.0 m * Penetration: 1270.6 m * Recovery: 690.1 m * Location: South Atlantic/CONT RISE * Campaign: Leg72 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 127 cores; 1092.5 m cored; 9 m drilled; 63.2 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Hart, Stanley R | DSDP/ODP/IODP sample designation | ||
| 2 | Piece | Piece | Hart, Stanley R | |||
| 3 | Identification | ID | Hart, Stanley R | |||
| 4 | Description | Description | Hart, Stanley R | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 6 | Potassium | K | % | Hart, Stanley R | see reference(s) | |
| 7 | Potassium | K | mg/kg | Hart, Stanley R | see reference(s) | |
| 8 | Rubidium | Rb | mg/kg | Hart, Stanley R | see reference(s) | |
| 9 | Caesium | Cs | mg/kg | Hart, Stanley R | see reference(s) | |
| 10 | Strontium | Sr | mg/kg | Hart, Stanley R | see reference(s) | |
| 11 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Hart, Stanley R | see reference(s) | Data relative to 0.70800 for E & A standard | |
| 12 | Strontium-87/Strontium-86 ratio, error | 87Sr/86Sr e | ± | Hart, Stanley R | see reference(s) | 2sigma in-run statistics |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
60 data points