Magnetic remanence acquisition in DSDP Leg 73 Holes
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
1984
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| _version_ | 1867170465352515584 |
|---|---|
| author | Tucker, Peter |
| author_facet | Tucker, Peter |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The major magnetic mineral in the turbidites and slumped sediments recovered at Leg 73 drill sites was near to magnetite in composition and in the form of small multidomain particles. There was no variation in magnetic mineralogy with the lithology. The variations in the intensities and directions of the natural remanent magnetization could be explained in terms of postdepositional grain rotations within the wet sediment. In the sands realignment was partial, whereas in some of the slumps the entire remanent magnetization was reset. Fine-particle magnetite was also the main magnetic constituent of the red clays. A significant proportion of a higher-coercivity mineral was also present. The magnetic characteristics of the red clays are explained as a combination of concentration and grain rotation effects. The implications to the assessment of the reliability of paleomagnetic data are discussed. Note: Conversion factors are as follows: 1 Am**2/kg = 1 emu/g, and 80 A/m about 1 Oe. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_811134 |
| institution | PANGAEA |
| language | en |
| publishDate | 1984 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Magnetic remanence acquisition in DSDP Leg 73 Holes Tucker, Peter 73-519; 73-523; 73-524; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg73; South Atlantic/CANYON; South Atlantic/PLATEAU; South Atlantic/RIDGE The major magnetic mineral in the turbidites and slumped sediments recovered at Leg 73 drill sites was near to magnetite in composition and in the form of small multidomain particles. There was no variation in magnetic mineralogy with the lithology. The variations in the intensities and directions of the natural remanent magnetization could be explained in terms of postdepositional grain rotations within the wet sediment. In the sands realignment was partial, whereas in some of the slumps the entire remanent magnetization was reset. Fine-particle magnetite was also the main magnetic constituent of the red clays. A significant proportion of a higher-coercivity mineral was also present. The magnetic characteristics of the red clays are explained as a combination of concentration and grain rotation effects. The implications to the assessment of the reliability of paleomagnetic data are discussed. Note: Conversion factors are as follows: 1 Am**2/kg = 1 emu/g, and 80 A/m about 1 Oe. |
| title | Magnetic remanence acquisition in DSDP Leg 73 Holes |
| topic | 73-519; 73-523; 73-524; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg73; South Atlantic/CANYON; South Atlantic/PLATEAU; South Atlantic/RIDGE |
| url | https://doi.org/10.1594/PANGAEA.811134 |