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O'Donovan, J B; O'Reilly, W (1983): Magnetic properties of basalts from DSDP Hole 69-504B [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.816937, Supplement to: O'Donovan, JB; O'Reilly, W (1983): Magnetic properties of basalts from Hole 504B, Deep Sea Drilling Project Leg 69. In: Cann, JR; Langseth, MG; Honnorez, J; Von Herzen, RP; White, SM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 69, 721-726, https://doi.org/10.2973/dsdp.proc.69.147.1983

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Abstract:
The NRM intensity, AF demagnetization characteristics, hysteresis parameters, initial susceptibility, and thermomagnetic characteristics of 18 basalt specimens from Deep Sea Drilling Project Hole 504B were determined. In six samples, the grain size was large enough to allow microprobe analysis.
We conclude (1) that the dominant magnetic mineral is titanomagnetite/titanomaghemite; (2) that, except for the upper few meters of the core where the grains are in the stable monodomain state, the grain size of the magnetic mineral lies in the pseudo-single-domain range (< 10 µm); (3) that maghemitization (i.e., low-temperature (< 350°C) oxidation) has taken place.
We discuss possible geological histories.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 1.227200 * Longitude: -83.730200
Date/Time Start: 1979-10-07T00:00:00 * Date/Time End: 1979-10-07T00:00:00
Event(s):
69-504B * Latitude: 1.227200 * Longitude: -83.730200 * Date/Time: 1979-10-07T00:00:00 * Elevation: -3460.0 m * Penetration: 489 m * Recovery: 262 m * Campaign: Leg69 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL)
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. O'Donovan, JB; O'Reilly, W (1983): (Table 2) Hysteresis characteristics for DSDP Hole 69-504B basalts. https://doi.org/10.1594/PANGAEA.816936
  2. O'Donovan, JB; O'Reilly, W (validated): (Table 1) Intensities and directions of natural remanent magnetization, initial magnetic susceptibility, and Koenigsberger ratio at DSDP Hole 69-504B. https://doi.pangaea.de/10.1594/PANGAEA.816639