Selective destructive demagnetization of breccias from DSDP Hole 83-504B
| Cobertura |
LATITUDE: 1.227200 * LONGITUDE: -83.730200 |
|---|---|
| Data(s) |
15/05/1986
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| Resumo |
The magnetization of four breccia samples from the Leg 83 section of DSDP Hole 504B was analyzed by selective destructive demagnetization in order to study the origin and stability of hydrothermally altered basalts. The NRM directions of the clasts for three of the four samples are randomly oriented and much more strongly magnetized than the bulk sample. Clasts which were individually demagnetized show two or more components of magnetization, but neither are coincident with those of the bulk sample, indicating that NRM was probably acquired prior to the consolidation of the breccia and suggesting that any overprint (VRM or otherwise) can be removed by AF demagnetization to at most 50 Oe. Reflected light microscopy and electron microprobe analysis of two samples show that the unexpectedly high NRM of the matrix regions is apparently the result of secondary magnetic phases precipitated from hydrothermal solutions. |
| Formato |
application/zip, 2 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.715073 doi:10.1594/PANGAEA.715073 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Smith, Guy M (1986): Selective destructive demagnetization of breccias from DSDP Leg 83: a microconglomerate test. Earth and Planetary Science Letters, 78(2-3), 315-321, doi:10.1016/0012-821X(86)90070-1 |
| Palavras-Chave | #83-504B; ARM, Intensity, per unit volume; ARM, median destructive field of anhysteretic remanent magnetisation; Curie temp; Curie temperature; Decl (NRM); Deep Sea Drilling Project; Depth; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Incl (NRM); initial susceptibility; Inten (ARM); Inten (NRM); Ja = ARM magnitude; JN = NRM magnitude; Koenigsberger ratio; Label; Leg83; MDF (ARM); MDF (NRM); median demagnetizing field; No; NRM, Declination; NRM, Inclination; NRM, Intensity; NRM, median destructive field of natural remanent magnetisation, alternating field; Number; ODP sample designation; Q-ratio; Sample code/label; Suscept; Susceptibility |
| Tipo |
Dataset |
