Magnetic properties and geochemistry in DSDP Holes 69-504B an d 69-505B
| Cobertura |
MEDIAN LATITUDE: 1.147037 * MEDIAN LONGITUDE: -71.179382 * SOUTH-BOUND LATITUDE: 0.000000 * WEST-BOUND LONGITUDE: -83.788300 * NORTH-BOUND LATITUDE: 1.920000 * EAST-BOUND LONGITUDE: 0.000000 * DATE/TIME START: 1979-09-29T00:00:00 * DATE/TIME END: 1979-10-07T00:00:00 |
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| Data(s) |
12/07/1983
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| Resumo |
More than 60 basalt samples from two Deep Sea Drilling Project holes on the Costa Rica Rift were studied for magnetic properties and were found to have no properties significantly different from other DSDP basalts. Opaque mineralogical and thermomagnetic properties of these samples, however, to some extent show differences from normal submarine basalts; a new type of thermomagnetic curve and wide range of chemical compositions were recognized. Oxidized samples possibly containing incipient ilmenite exsolution lamellae were reduced and re-equilibrated during heating. The Curie temperatures of the re-equilibrated titanomagnetites are interpreted to be those of the original crystallized phase before oxidation. |
| Formato |
application/zip, 3 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.816638 doi:10.1594/PANGAEA.816638 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Furuta, Toshio (1983): Magnetic properties of basalt samples from Holes 504B and 505B on the Costa Rica Rift, Deep Sea Drilling Project Legs 69 and 70. In: Cann, JR; Langseth, MG; Honnorez, J; Von Herzen, RP; White, SM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 69, 711-720, doi:10.2973/dsdp.proc.69.146.1983 |
| Palavras-Chave | #69-504B; 69-505B; Al2O3; Aluminium oxide; Averages of largest 10 grain; Coercivity; Coercivity of remanence; Curie temp; Curie temperature; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Electron microprobe; Event; FeO; First; Glomar Challenger; Grain size, mean; gs mean; Hc; Hcr; Highest; Inten (NRM); Iron oxide, FeO; Jrs; Js; Label; Leg69; Magnetometer; MDF (NRM); Minerals; Mol %; North Pacific/GRABEN; NRM, Intensity; NRM, Median destructive field of natural remanent magnetisation; ODP sample designation; Ratio; Ratio of saturation magnetization observed at room temperature after and before heating, temperatures in deg C; Remanent coercive force/coercive force ratio; Remanent saturation magnetization; Remanent saturation magnetization/saturation magnetization ratio; Rock; Rock type; Sample code/label; SampleID; Sample ID; Saturation magnetization; Second; see reference(s); Standard deviation; Std dev; Suscept; Susceptibility; Ti/Fe; Ti/Fe mol ratio of ilmenite = atomic ratio of discrete ilmenite grains; TiO2; Titanium/Iron ratio; Titanium oxide; Total iron; Type; Unit is 10**-4 Gauss; x; x = value in the formula xFe2TiO4 (1 - x)Fe3O4 |
| Tipo |
Dataset |
