Geochemistry at DSDP Leg 60
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PANGAEA
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
1982
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| _version_ | 1867169510042107904 |
|---|---|
| author | Desprairies, Alain |
| author_facet | Desprairies, Alain |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Eocene to Pleistocene volcanogenic sediments from the Mariana Trough and the Mariana arc-trench system have been studied by X-ray diffraction, X-ray fluorescence, and atomic absorption, and with a scanning electron microscope with an X-ray-energy-dispersive attachment. The mineralogical composition of the volcaniclastic sediments (tuffs) is the same as that of the other associated sediments (mudstones). Diagenetic alterations are significant and seem to result from two processes. The first (low-temperature alteration) develops with age and depth; it consists of the genesis of pure smectite, coupled with zeolites (phillipsite, clinoptilolite). The second is limited to sediments immediately overlying basalts and to the altered basalts themselves. It consists of the massive development of palygorskite, and seems to be linked with hydrothermal activity in the igneous basement. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_820015 |
| institution | PANGAEA |
| language | en |
| publishDate | 1982 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Geochemistry at DSDP Leg 60 Desprairies, Alain 60-453; 60-454; 60-456; 60-459B; 60-460; 60-460A; 60-461; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg60; North Pacific/SEDIMENT POND; North Pacific/TRENCH Eocene to Pleistocene volcanogenic sediments from the Mariana Trough and the Mariana arc-trench system have been studied by X-ray diffraction, X-ray fluorescence, and atomic absorption, and with a scanning electron microscope with an X-ray-energy-dispersive attachment. The mineralogical composition of the volcaniclastic sediments (tuffs) is the same as that of the other associated sediments (mudstones). Diagenetic alterations are significant and seem to result from two processes. The first (low-temperature alteration) develops with age and depth; it consists of the genesis of pure smectite, coupled with zeolites (phillipsite, clinoptilolite). The second is limited to sediments immediately overlying basalts and to the altered basalts themselves. It consists of the massive development of palygorskite, and seems to be linked with hydrothermal activity in the igneous basement. |
| title | Geochemistry at DSDP Leg 60 |
| topic | 60-453; 60-454; 60-456; 60-459B; 60-460; 60-460A; 60-461; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg60; North Pacific/SEDIMENT POND; North Pacific/TRENCH |
| url | https://doi.org/10.1594/PANGAEA.820015 |