Juarez, M T; Tauxe, Lisa (2000): Paleointensity of various DSDP sites (Table 3) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.723119, Supplement to: Juarez, MT; Tauxe, L (2000): The intensity of the time-averaged geomagnetic field: the last 5 Myr. Earth and Planetary Science Letters, 175(3-4), 169-180, https://doi.org/10.1016/S0012-821X(99)00306-4
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Abstract:
The existing database for paleointensity estimates of the ancient geomagnetic field contains more than 1500 data points collected through decades of effort. Despite the huge amount of work put into obtaining these data, there remains a strong bias in the age and global distribution of the data toward very young results from a few locations. Also, few of the data meet strict criteria for reliability and most are of unknown quality. In order to improve the age and spatial distribution of the paleointensity database, we have carried out paleointensity experiments on submarine basaltic glasses from a number of DSDP sites. Of particular interest are the sites that provide paleointensity data spanning the time period 0.3-5 Ma, a time of relatively few high quality published data points. Our new data are concordant with contemporaneous data from the published literature that meet minimum acceptance criteria, and the combined data set yields an average dipole moment of 5.49 +/- 2.36*10**22 Am**2. This average value is comparable to the average paleofield for the period 5-160 Ma (4.2 +/- 2.3*10**22 Am**2) (Juarez et al., 1998, doi:10.1038/29746) and is substantially less than the value of approximately 8*10**22 Am**2 often quoted for the last 5 Myr (e.g. McFadden and McElhinny (1982) J. Geomagn. Geoelectr. 34, 163-189; Goguitchaichvili et al., 1999, doi:10.1016/S0012-821X(99)00010-2).
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 24.896200 * Median Longitude: -86.837171 * South-bound Latitude: 9.001700 * West-bound Longitude: -108.978000 * North-bound Latitude: 36.878700 * East-bound Longitude: -33.641000
Date/Time Start: 1974-06-17T00:00:00 * Date/Time End: 1979-02-12T00:00:00
Minimum DEPTH, sediment/rock: 118.0 m * Maximum DEPTH, sediment/rock: 712.0 m
Event(s):
37-332A * Latitude: 36.878700 * Longitude: -33.641000 * Date/Time: 1974-06-17T00:00:00 * Elevation: -1818.0 m * Penetration: 434.5 m * Recovery: 66.2 m * Location: North Atlantic/VALLEY * Campaign: Leg37 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 39 cores; 370.5 m cored; 0 m drilled; 17.9 % recovery
37-332B * Latitude: 36.878700 * Longitude: -33.641000 * Date/Time: 1974-06-17T00:00:00 * Elevation: -1806.0 m * Penetration: 721.5 m * Recovery: 122.9 m * Location: North Atlantic/VALLEY * Campaign: Leg37 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 48 cores; 582.5 m cored; 0 m drilled; 19.4 % recovery
54-420 * Latitude: 9.001700 * Longitude: -106.112800 * Date/Time: 1977-05-10T00:00:00 * Elevation: -3381.0 m * Penetration: 147 m * Recovery: 82.2 m * Location: North Pacific/SEDIMENT POND * Campaign: Leg54 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 15 cores; 123.2 m cored; 0 m drilled; 66.7 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Longitude of event | Longitude | ||||
| 3 | Latitude of event | Latitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | Sample code/label | Sample label | Juarez, M T | DSDP/ODP/IODP sample designation | Leg-Hole-Core-Section, piece. * = duplicate pieces | |
| 6 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 7 | Temperature, technical | T tech | °C | Juarez, M T | minimum | |
| 8 | Temperature, technical | T tech | °C | Juarez, M T | maximum | |
| 9 | Number | No | Juarez, M T | of steps | ||
| 10 | Magnetic field, Z-component | Z-comp | nT | Juarez, M T | ancient field | |
| 11 | Factor | Factor | Juarez, M T | Quality factor | ||
| 12 | Best Fit Temp T0 | Best Fit Temp T0 | Juarez, M T | scatter about best-fit line | ||
| 13 | Maximum angular deviation | MAD | deg | Juarez, M T | ||
| 14 | Angle | Angle | deg | Juarez, M T | between the resultant vector of the same data and the principle component | |
| 15 | Difference | Diff | Juarez, M T | difference ratio | ||
| 16 | Virtual dipole moment | VDM | 1022 A*m2 | Juarez, M T | VADM (virtual axial dipole moment) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
352 data points