Stokking, Laura B; Merrill, Dean L; Haston, Roger B; Ali, Jason Richard; Saboda, Kristine L (1992): Rock magnetic of serpentinite seamounts in the Mariana and Izu-Bonin regions [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.771091, Supplement to: Stokking, LB et al. (1992): Rock magnetic studies of serpentinite seamounts in the Mariana and Izu-Bonin regions. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 561-579, https://doi.org/10.2973/odp.proc.sr.125.158.1992
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Abstract:
During Leg 125, scientists drilled two serpentinite seamounts: Conical Seamount in the Mariana forearc and Torishima Forearc Seamount in the Izu-Bonin forearc. Grain densities of the serpentinized peridotites range from 2.44 to 3.02 g/cm**3. The NRM intensity of the serpentinized peridotites ranges from 0.01 to 0.59 A/m and that of serpentine sediments ranges from 0.01 to 0.43 A/m. Volume susceptibilities of serpentinized peridotites range from 0.05 * 10**-3 SI to 9.78 * 10**-3 SI and from 0.12 * 10**-3 to 4.34 * 10**-3 SI in the sediments. Koenigsberger ratios, a measure of the relative contributions of remanent vs. induced magnetization to the magnetic anomaly, vary from 0.09 to 80.93 in the serpentinites and from 0.06 to 4.74 in the sediments. The AF demagnetization behavior of the serpentinized peridotites shows that a single component of remanence (probably a chemical remanence carried by secondary magnetite) can be isolated in many samples that have a median destructive field less than 9.5 mT. Multiple remanence components are observed in other samples. Serpentine sediments exhibit similar behavior. Comparison of the AF demagnetization of saturation isothermal remanence and NRM suggests that the serpentinized peridotites contain both single-domain and multidomain magnetite particles. The variability of the magnetic properties of serpentinized peridotites reflects the complexity of magnetization acquired during serpentinization. Serpentinized peridotites may contribute to magnetic anomalies in forearc regions.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 24.732692 * Median Longitude: 144.414771 * South-bound Latitude: 19.499000 * West-bound Longitude: 141.738000 * North-bound Latitude: 30.908000 * East-bound Longitude: 146.696000
Date/Time Start: 1989-02-22T06:30:00 * Date/Time End: 1989-03-31T10:00:00
Event(s):
125-778A * Latitude: 19.499000 * Longitude: 146.666000 * Date/Time Start: 1989-02-22T06:30:00 * Date/Time End: 1989-02-24T19:25:00 * Elevation: -3924.0 m * Penetration: 107.6 m * Recovery: 22.8 m * Location: North Pacific Ocean * Campaign: Leg125 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 107.6 m cored; 0 m drilled; 21.2 % recovery
125-779A * Latitude: 19.512500 * Longitude: 146.696000 * Date/Time Start: 1989-02-28T10:00:00 * Date/Time End: 1989-03-04T03:00:00 * Elevation: -3958.0 m * Penetration: 317.2 m * Recovery: 73.24 m * Location: North Pacific Ocean * Campaign: Leg125 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 37 cores; 317.2 m cored; 0 m drilled; 23.1 % recovery
125-780C * Latitude: 19.542200 * Longitude: 146.653500 * Date/Time Start: 1989-03-06T05:00:00 * Date/Time End: 1989-03-09T04:30:00 * Elevation: -3095.0 m * Penetration: 163.5 m * Recovery: 14.44 m * Location: North Pacific Ocean * Campaign: Leg125 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 18 cores; 163.5 m cored; 0 m drilled; 8.8 % 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
- Stokking, LB; Merrill, DL; Haston, RB et al. (1992): (Table 1) Rock magnetic properties of serpentinized peridotites from ODP Leg 125. https://doi.org/10.1594/PANGAEA.771079
- Stokking, LB; Merrill, DL; Haston, RB et al. (1992): (Table 2) Rock magnetic properties of serpentinize sediments from ODP Leg 125. https://doi.org/10.1594/PANGAEA.771088