Natural oxides, elements and remanent magnetization intensities and directions at DSDP Hole 93-603B
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| Main Authors: | , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1987
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| _version_ | 1867167668847509504 |
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| author | Klaver, G T van Kempen, Th MG Bianchi, F van der Gaast, Sjerry J |
| author_facet | Klaver, G T van Kempen, Th MG Bianchi, F van der Gaast, Sjerry J |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Dark green spherules occur in the lower part of a turbidite in Section 603B-22-3, at the 70 cm level. In all probability these spherules originally consisted of massive glass, but now appear to have become completely altered into smectite. The presence of numerous microscopic fissures in the spherules probably mediated in the alteration process. Judging by the presence of similar spherules at the Cretaceous/Tertiary (K/T) boundary in DSDP Hole 390B, the green spherules are thought to represent diagenetically altered impact ejecta from one large or several smaller extraterrestrial objects at the end of the Cretaceous. The presence of anomalously high concentrations of Ni, Co, and As higher up in the turbidite are in agreement with an expected enrichment of these elements in the K/T boundary clay. However, precise Ir analyses are necessary in order to confirm this. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_789118 |
| institution | PANGAEA |
| language | en |
| publishDate | 1987 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Natural oxides, elements and remanent magnetization intensities and directions at DSDP Hole 93-603B Klaver, G T van Kempen, Th MG Bianchi, F van der Gaast, Sjerry J 93-603B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg93 Dark green spherules occur in the lower part of a turbidite in Section 603B-22-3, at the 70 cm level. In all probability these spherules originally consisted of massive glass, but now appear to have become completely altered into smectite. The presence of numerous microscopic fissures in the spherules probably mediated in the alteration process. Judging by the presence of similar spherules at the Cretaceous/Tertiary (K/T) boundary in DSDP Hole 390B, the green spherules are thought to represent diagenetically altered impact ejecta from one large or several smaller extraterrestrial objects at the end of the Cretaceous. The presence of anomalously high concentrations of Ni, Co, and As higher up in the turbidite are in agreement with an expected enrichment of these elements in the K/T boundary clay. However, precise Ir analyses are necessary in order to confirm this. |
| title | Natural oxides, elements and remanent magnetization intensities and directions at DSDP Hole 93-603B |
| topic | 93-603B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg93 |
| url | https://doi.org/10.1594/PANGAEA.789118 |