(Table 1) Magnetic properties of basalt samples, at DSDP Legs 69 and 70
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
1983
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| _version_ | 1867168142976876544 |
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| author | Pechersky, D M Tikhonov, L V Pertsev, Nikolay N |
| author_facet | Pechersky, D M Tikhonov, L V Pertsev, Nikolay N |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We studied magnetic properties of basalts from cores of Sites 504 (mainly Hole 504B) and 505. According to magnetic and petrographic data, the basalts are altered to different degrees. We determined the ratio Ist/Iso and the Curie points of the basalts. In Hole 504B there is vertical zoning of titanomagnetite alteration: in the upper part of the basement, low temperature titanomaghemitization predominates (IST/Iso > 1); in the lower part of the hole, multi-phase alteration (IST/Iso < 1) predominates. This is evidence for superimposition of multi-phase alteration after single-phase oxidation. The latter process occurred at low temperatures. Multi-phase alteration is represented by exsolution and unmixing of titanomagnetite. Its appearance is connected with extended secondary heating at temperatures of about 100°C, documented by thermal measurements in the hole. Magnetic properties of basalts from Site 505 are typical of submarine pillow lavas that contain fine-grained titanomaghemite. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_816634 |
| institution | PANGAEA |
| language | en |
| publishDate | 1983 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Magnetic properties of basalt samples, at DSDP Legs 69 and 70 Pechersky, D M Tikhonov, L V Pertsev, Nikolay N 69-504A; 69-504B; 69-505A; 69-505B; 70-504B; Coercivity of remanence; Curie temperature; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Glomar Challenger; Koenigsberger ratio; Latitude of event; Leg69; Leg70; Longitude of event; Median demagnetizing field; Natural remanent magnetization; North Pacific/GRABEN; Ratio; Sample code/label; Saturation magnetization; Susceptibility We studied magnetic properties of basalts from cores of Sites 504 (mainly Hole 504B) and 505. According to magnetic and petrographic data, the basalts are altered to different degrees. We determined the ratio Ist/Iso and the Curie points of the basalts. In Hole 504B there is vertical zoning of titanomagnetite alteration: in the upper part of the basement, low temperature titanomaghemitization predominates (IST/Iso > 1); in the lower part of the hole, multi-phase alteration (IST/Iso < 1) predominates. This is evidence for superimposition of multi-phase alteration after single-phase oxidation. The latter process occurred at low temperatures. Multi-phase alteration is represented by exsolution and unmixing of titanomagnetite. Its appearance is connected with extended secondary heating at temperatures of about 100°C, documented by thermal measurements in the hole. Magnetic properties of basalts from Site 505 are typical of submarine pillow lavas that contain fine-grained titanomaghemite. |
| title | (Table 1) Magnetic properties of basalt samples, at DSDP Legs 69 and 70 |
| topic | 69-504A; 69-504B; 69-505A; 69-505B; 70-504B; Coercivity of remanence; Curie temperature; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Glomar Challenger; Koenigsberger ratio; Latitude of event; Leg69; Leg70; Longitude of event; Median demagnetizing field; Natural remanent magnetization; North Pacific/GRABEN; Ratio; Sample code/label; Saturation magnetization; Susceptibility |
| url | https://doi.org/10.1594/PANGAEA.816634 |