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| Main Authors: | , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
1983
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.816415 |
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| _version_ | 1867168563665567744 |
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| author | Noack, Y Emmermann, Rolf Hubberten, Hans-Wolfgang |
| author_facet | Noack, Y Emmermann, Rolf Hubberten, Hans-Wolfgang |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The interaction of seawater with basalts in DSDP Hole 501 and the upper part of Hole 504B (Costa Rica Rift) produced oxidative alteration and a zonation of clay minerals along cracks. From rock edges to interiors in many cracks the following succession occurs, based on microscopic observations and microprobe analysis: iron hydroxides (red), "protoceladonite" (green), iddingsite (orange), and saponite (yellow). Clay minerals replace olivines and fill vesicles and cracks. Other secondary minerals are phillipsite, aragonite, and unidentified carbonates. Some glass is transformed to Mg-rich palagonite. Bulk rock chemistry is related to the composition of the secondary minerals. The zonation can be interpreted as a succession of postburial nonoxidative and oxidative diagenesis similar to that described in the Leg 34 basalts. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_816415 |
| institution | PANGAEA |
| language | en |
| publishDate | 1983 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Geochemistry of minerals at DSDP Holes 68-501 and 69-504B Noack, Y Emmermann, Rolf Hubberten, Hans-Wolfgang 68-501; 69-504B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg68; Leg69; North Pacific/FLANK The interaction of seawater with basalts in DSDP Hole 501 and the upper part of Hole 504B (Costa Rica Rift) produced oxidative alteration and a zonation of clay minerals along cracks. From rock edges to interiors in many cracks the following succession occurs, based on microscopic observations and microprobe analysis: iron hydroxides (red), "protoceladonite" (green), iddingsite (orange), and saponite (yellow). Clay minerals replace olivines and fill vesicles and cracks. Other secondary minerals are phillipsite, aragonite, and unidentified carbonates. Some glass is transformed to Mg-rich palagonite. Bulk rock chemistry is related to the composition of the secondary minerals. The zonation can be interpreted as a succession of postburial nonoxidative and oxidative diagenesis similar to that described in the Leg 34 basalts. |
| title | Geochemistry of minerals at DSDP Holes 68-501 and 69-504B |
| topic | 68-501; 69-504B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg68; Leg69; North Pacific/FLANK |
| url | https://doi.org/10.1594/PANGAEA.816415 |