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Richardson, Stephen H; Hart, Stanley R; Staudigel, Hubert (1980): Vein mineral ages of oceanic crust from the Atlantic Ocean [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.708671, Supplement to: Richardson, SH et al. (1980): Vein mineral ages of old oceanic crust. Journal of Geophysical Research: Solid Earth, 85(B12), 7195-7200, https://doi.org/10.1029/JB085iB12p07195

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Abstract:
Vein smectites with large Rb/Sr enrichments from extensively altered basaltic oceanic crust in Deep Sea Drilling Project hole 417A in the western Atlantic define a highly constrained Rb/Sr isochron age of 108 +/- 3 m.y. This age is identical to a less well constrained age of 108 +/- 17 m.y. for vein smectites with lower Rb/Sr enrichments from adjacent hole 418A and to the 108 m.y. age of crust formation derived by paleontological and magnetic anomaly correlation. Reasonable agreement exists between the 87Sr/86Sr ratio of vein calcites from both sites and the seawater 87Sr/86Sr ratio at the time. Pervasive low-temperature alteration in the contrasting environments of sites 417 and 418 appears to be coeval and essentially coincident with basement formation. Alteration may be used to advantage in determining ages of old oceanic crust.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 25.072750 * Median Longitude: -68.049300 * South-bound Latitude: 25.035000 * West-bound Longitude: -68.057300 * North-bound Latitude: 25.110500 * East-bound Longitude: -68.041300
Date/Time Start: 1976-12-02T00:00:00 * Date/Time End: 1977-02-10T00:00:00
Event(s):
51-417A * Latitude: 25.110500 * Longitude: -68.041300 * Date/Time: 1976-12-02T00:00:00 * Elevation: -5468.0 m * Penetration: 417 m * Recovery: 250.4 m * Location: North Atlantic/CONT RISE * Campaign: Leg51 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 389.1 m cored; 27.8 m drilled; 64.4 % recovery
52-418A * Latitude: 25.035000 * Longitude: -68.057300 * Date/Time: 1977-02-10T00:00:00 * Elevation: -5511.0 m * Penetration: 570.5 m * Recovery: 205.5 m * Location: North Atlantic/CONT RISE * Campaign: Leg52 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 48 cores; 374 m cored; 0 m drilled; 54.9 % recovery
Comment:
Further relevant data see Hart and Staudigel (1978) data set: doi:10.1594/PANGAEA.708668
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Richardson, SH; Hart, SR; Staudigel, H (1980): (Table 1) Rb-Sr contants and ratios of calcites and silicates of DSDP Hole 51-417A. https://doi.org/10.1594/PANGAEA.708669
  2. Richardson, SH; Hart, SR; Staudigel, H (1980): (Table 2) Rb-Sr contants and ratios of calcites and silicates of DSDP Hole 52-418A. https://doi.org/10.1594/PANGAEA.708670