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Ozima, Minoru; Saito, K; Takigami, Yutaka (1981): 40Ar-39Ar geochronological studies on rocks drilled at DSDP Holes 61-462 and 61-462A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.819947, Supplement to: Ozima, M et al. (1981): 40Ar–39Ar geochronological studies on rocks drilled at Holes 462 and 462A, Deep Sea Drilling Project Leg 61. In: Larson, RL; Schlanger, SO; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 61, 701-703, https://doi.org/10.2973/dsdp.proc.61.128.1981

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Abstract:
40Ar-39Ar step-heating dating was applied to a basalt from Hole 462 and to basalt and dolerite samples from Hole 462A. Only a basalt sample at Hole 462A yielded a reasonable isochron age, 110 ± 3 million years. The radiometric age is consistent with the fossil record (Cenomanian) in the sediments, into which the basalt sill intruded. However, the age is much less than that of the oceanic basement as deduced from the magnetic anomaly (M-26).
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 7.239600 * Median Longitude: 165.031100 * South-bound Latitude: 7.237500 * West-bound Longitude: 165.030500 * North-bound Latitude: 7.241700 * East-bound Longitude: 165.031700
Date/Time Start: 1978-05-28T00:00:00 * Date/Time End: 1978-06-09T00:00:00
Event(s):
61-462 * Latitude: 7.237500 * Longitude: 165.030500 * Date/Time: 1978-05-28T00:00:00 * Elevation: -5181.0 m * Penetration: 617 m * Recovery: 386 m * Campaign: Leg61 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 70 cores; 627.4 m cored; 0 m drilled; 61.5 % recovery
61-462A * Latitude: 7.241700 * Longitude: 165.031700 * Date/Time: 1978-06-09T00:00:00 * Elevation: -5177.0 m * Penetration: 1068.5 m * Recovery: 344 m * Campaign: Leg61 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 90 cores; 619.5 m cored; 14.5 m drilled; 55.5 % 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

  1. Ozima, M; Saito, K; Takigami, Y (1981): (Table 2) Final age dating and associated data at DSDP Holes 61-462 and 61-462A. https://doi.org/10.1594/PANGAEA.819945
  2. Ozima, M; Saito, K; Takigami, Y (1981): (Table 1) Isotopic Ar and ages at DSDP Holes 61-462 and 61-462A. https://doi.org/10.1594/PANGAEA.819944