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Wang, Daming; Van der Voo, Rob; Peacor, Donald R (2005): Magnetic properties of Cenozoic MORB and Cretaceous MORB from DSDP and ODP holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.711520, Supplement to: Wang, D et al. (2005): Why is the remanent magnetic intensity of Cretaceous MORB so much higher than that of mid to late Cenozoic MORB? Geosphere, 1(3), 138-146, https://doi.org/10.1130/GES00024.1

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Abstract:
The fact that the natural remanent magnetization (NRM) intensity of mid-oceanic-ridge basalt (MORB) samples shows systematic variations as a function of age has long been recognized: maximum as well as average intensities are generally high for very young samples, falling off rather rapidly to less than half the recent values in samples between 10 and 30 Ma, whereupon they slowly rise in the early Tertiary and Cretaceous to values that approach those of the very young samples. NRM intensities measured in this study follow the same trends as those observed in previous publications. In this study, we take a statistical approach and examine whether this pattern can be explained by variations in one or more of all previously proposed mechanisms: chemical composition of the magnetic minerals, abundance of these magnetization carriers, vectorial superposition of parallel or antiparallel components of magnetization, magnetic grain or domain size patterns, low-temperature oxidation to titanomaghemite, or geomagnetic field behavior. We find that the samples do not show any compositional, petrological, rock-magnetic, or paleomagnetic patterns that can explain the trends. Geomagnetic field intensity is the only effect that cannot be directly tested on the same samples, but it shows a similar pattern as our measured NRM intensities. We therefore conclude that the geomagnetic field strength was, on-average, significantly greater during the Cretaceous than during the Oligocene and Miocene.
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 7.719000 * Median Longitude: -133.902836 * South-bound Latitude: -59.262300 * West-bound Longitude: 70.526000 * North-bound Latitude: 63.351000 * East-bound Longitude: -7.787800
Date/Time Start: 1972-06-16T00:00:00 * Date/Time End: 1990-01-04T17:20:00
Event(s):
24-238 * Latitude: -11.153500 * Longitude: 70.526000 * Date/Time: 1972-06-16T00:00:00 * Elevation: -2832.0 m * Penetration: 586.5 m * Recovery: 424 m * Location: Indian Ocean//FRACTURE ZONE * Campaign: Leg24 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 63 cores; 577 m cored; 9.5 m drilled; 73.5 % recovery
26-257 * Latitude: -30.986000 * Longitude: 108.349800 * Date/Time: 1972-10-20T00:00:00 * Elevation: -5278.0 m * Penetration: 326.5 m * Recovery: 77.1 m * Location: Indian Ocean//BASIN * Campaign: Leg26 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 146 m cored; 0 m drilled; 52.8 % recovery
27-261 * Latitude: -12.947200 * Longitude: 117.892700 * Date/Time: 1972-11-17T00:00:00 * Elevation: -5667.0 m * Penetration: 579.5 m * Recovery: 120.5 m * Location: Indian Ocean//PLAIN * Campaign: Leg27 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 36 cores; 323 m cored; 9.5 m drilled; 37.3 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
25 datasets

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Datasets listed in this publication series

  1. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 2) Magnetic properties and oxidation state of titanomagnetite in MORB older than 100 Ma, DSDP Hole 26-257. https://doi.org/10.1594/PANGAEA.711494
  2. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 2) Magnetic properties and oxidation state of titanomagnetite in MORB older than 100 Ma, DSDP Hole 52-418A. https://doi.org/10.1594/PANGAEA.711495
  3. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 2) Magnetic properties and oxidation state of titanomagnetite in MORB older than 100 Ma, DSDP Hole 61-462. https://doi.org/10.1594/PANGAEA.711496
  4. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 2) Magnetic properties and oxidation state of titanomagnetite in MORB older than 100 Ma, DSDP Hole 76-534A. https://doi.org/10.1594/PANGAEA.711497
  5. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 2) Magnetic properties and oxidation state of titanomagnetite in MORB older than 100 Ma, ODP Hole 129-802A. https://doi.org/10.1594/PANGAEA.711493
  6. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 3) Electron microprobe analyses of titanomagnetite/titanomaghemite in MORB older than 100 Ma, DSDP Hole 26-257. https://doi.org/10.1594/PANGAEA.711500
  7. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 3) Electron microprobe analyses of titanomagnetite/titanomaghemite in MORB older than 100 Ma, DSDP Hole 52-418A. https://doi.org/10.1594/PANGAEA.711501
  8. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 3) Electron microprobe analyses of titanomagnetite/titanomaghemite in MORB older than 100 Ma, DSDP Hole 76-534A. https://doi.org/10.1594/PANGAEA.711502
  9. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 3) Electron microprobe analyses of titanomagnetite/titanomaghemite in MORB older than 100 Ma, ODP Hole 129-802A. https://doi.org/10.1594/PANGAEA.711499
  10. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 3) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 24-238. https://doi.org/10.1594/PANGAEA.711503
  11. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 27-261. https://doi.org/10.1594/PANGAEA.711505
  12. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 28-267. https://doi.org/10.1594/PANGAEA.711506
  13. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 29-283. https://doi.org/10.1594/PANGAEA.711507
  14. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 34-320B. https://doi.org/10.1594/PANGAEA.711508
  15. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 38-336. https://doi.org/10.1594/PANGAEA.711509
  16. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 49-412A. https://doi.org/10.1594/PANGAEA.711510
  17. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 54-427. https://doi.org/10.1594/PANGAEA.711511
  18. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 58-446. https://doi.org/10.1594/PANGAEA.711512
  19. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 63-469. https://doi.org/10.1594/PANGAEA.711513
  20. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 65-483B. https://doi.org/10.1594/PANGAEA.711514
  21. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 67-495. https://doi.org/10.1594/PANGAEA.711515
  22. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 72-516F. https://doi.org/10.1594/PANGAEA.711516
  23. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 78-543A. https://doi.org/10.1594/PANGAEA.711517
  24. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 82-562. https://doi.org/10.1594/PANGAEA.711518
  25. Wang, D; Van der Voo, R; Peacor, DR (2005): (Table 4) Magnetic properties of titanomagnetite in MORB younger than 100 Ma, DSDP Hole 82-564. https://doi.org/10.1594/PANGAEA.711519