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Ozima, Minoru; Takigami, Yutaka; Kaneoka, Ichiro (1980): 40Ar-39Ar geochronological studies on rocks at DSDP Leg 58 Holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.821516, Supplement to: Ozima, M et al. (1980): 40Ar-39Ar geochronological studies on rocks of Deep Sea Drilling Project Sites 443, 445, and 446. In: deVries Klein, G; Kobayashi, K; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 58, 917-920, https://doi.org/10.2973/dsdp.proc.58.139.1980

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Abstract:
The technique of 40Ar-39Ar step-heating dating was applied to three rock samples from core of DSDP Site 443, one sample from Site 445, and four samples at Site 446. All sites were drilled during DSDP Leg 58.
At Site 443 (Shikoku Basin), about 116 meters of basalt basement was drilled. Three samples were chosen for dating from different levels in the basalt; two samples are aphyric basalt, and the other is subophitic dolerite.
At Site 445 (Daito Ridge), no basement rock was drilled; however, conglomeratic sandstone was cored in the lower part of the hole. 40Ar-39Ar dating was applied to a basalt pebble in the conglomerate.
At Site 446 (Daito Basin), the lower cored sequence is clay stone interlayered with 16 basalt sills. Four samples were chosen from sills at different levels.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 26.313682 * Median Longitude: 134.317847 * South-bound Latitude: 24.700700 * West-bound Longitude: 132.774800 * North-bound Latitude: 29.327500 * East-bound Longitude: 137.440500
Date/Time Start: 1977-12-28T00:00:00 * Date/Time End: 1978-01-18T00:00:00
Event(s):
58-443 * Latitude: 29.327500 * Longitude: 137.440500 * Date/Time: 1977-12-28T00:00:00 * Elevation: -4372.0 m * Penetration: 581.5 m * Recovery: 300 m * Location: North Pacific/BASIN * Campaign: Leg58 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 64 cores; 581.5 m cored; 0 m drilled; 51.6 % recovery
58-445 * Latitude: 25.522700 * Longitude: 133.208200 * Date/Time: 1978-01-11T00:00:00 * Elevation: -3377.0 m * Penetration: 892 m * Recovery: 609.5 m * Location: North Pacific/BASIN * Campaign: Leg58 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 93 cores; 882.5 m cored; 0 m drilled; 69.1 % recovery
58-446A * Latitude: 24.700700 * Longitude: 132.774800 * Date/Time: 1978-01-18T00:00:00 * Elevation: -4952.0 m * Penetration: 628.5 m * Recovery: 117.5 m * Location: North Pacific/Philippine Sea/BASIN * Campaign: Leg58 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 28 cores; 256.5 m cored; 0 m drilled; 45.8 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Ozima, M; Takigami, Y; Kaneoka, I (1980): (Table 2) Analytical data for step-heating experiments at DSDP Hole 58-445 and 58-446A. https://doi.org/10.1594/PANGAEA.821514
  2. Ozima, M; Takigami, Y; Kaneoka, I (1980): (Table 3) Total fusion ages and isochron data at DSDP Leg 58 Holes. https://doi.org/10.1594/PANGAEA.821515
  3. Ozima, M; Takigami, Y; Kaneoka, I (1980): (Table 1) Petrologic descriptions of sampled basalts at DSDP Leg 58 Holes. https://doi.org/10.1594/PANGAEA.821512