Fujii, Naoyuki; Hamano, Yozo (1986): (Table 1) Anisotropy of magnetic susceptibility of basalts at DSDP Hole 89-462A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.800071, Supplement to: Fujii, N; Hamano, Y (1986): Anisotropy of basalts, Hole 462A, Nauru Basin, Deep Sea Drilling Project Leg 89. In: Moberly, R; Schlanger, SO; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 89, 647-650, https://doi.org/10.2973/dsdp.proc.89.128.1986
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Abstract:
Measurements of the anisotropy of magnetic susceptibility (AMS) in basalts cored from 1070 to 1209 m sub-bottom depth in Hole 462A reveal that samples with a high ratio of maximum (K1) to minimum (K3) principal susceptibility show a prolate type of anisotropy in which K1 axes are nearly vertical. For other prolate types, K1 axes vary widely. Although the oblate type of AMS is less common among these basalts, K3 axes are nearly vertical in the upper units and horizontal in the lower units. The anisotropy of compressional wave velocities measured for the same specimen shows no correlation with the degree and type of AMS. This finding indicates that AMS could have been caused by variations in flows but not by compressive stress. Processes of emplacement of basaltic sills and flows must have been complex, because directions of principal axes of AMS vary from unit to unit.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 7.241700 * Longitude: 165.031700
Date/Time Start: 1982-11-05T00:00:00 * Date/Time End: 1982-11-05T00:00:00
Minimum DEPTH, sediment/rock: 1072.3 m * Maximum DEPTH, sediment/rock: 1201.6 m
Event(s):
89-462A * Latitude: 7.241700 * Longitude: 165.031700 * Date/Time: 1982-11-05T00:00:00 * Elevation: -5177.0 m * Penetration: 1209 m * Recovery: 74.4 m * Location: North Pacific Ocean * Campaign: Leg89 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 137.3 m cored; 0 m drilled; 54.2 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Fujii, Naoyuki | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 3 | Magnetic susceptibility, volume | kappa | 10-6 SI | Fujii, Naoyuki | see reference(s) | unit is cgs |
| 4 | Ratio | Ratio | Fujii, Naoyuki | Calculated | K1/K3 | |
| 5 | Parameter | Parameter | arbitrary units | Fujii, Naoyuki | Calculated | tan**2 A=(K2-K3)/(K1-K2) |
| 6 | - | - | Fujii, Naoyuki | Calculated | F**2=K1**2/(K2*K3) | |
| 7 | Angle | Angle | deg | Fujii, Naoyuki | angle between the vertical axis and K3 (prolate) | |
| 8 | Angle | Angle | deg | Fujii, Naoyuki | angle between the vertical axis and K1 (oblate) | |
| 9 | Ratio | Ratio | Fujii, Naoyuki | Vmax/Vmin, ratio of maximum to minimum compressional wave velocities | ||
| 10 | Lithologic unit/sequence | Unit | Fujii, Naoyuki | volcanic |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
200 data points