Mineralogy and geochemistry of alteration products in DSDP Leg 81 Holes
| Cobertura |
MEDIAN LATITUDE: 56.167262 * MEDIAN LONGITUDE: -23.032400 * SOUTH-BOUND LATITUDE: 56.042700 * WEST-BOUND LONGITUDE: -23.528200 * NORTH-BOUND LATITUDE: 56.561700 * EAST-BOUND LONGITUDE: -20.782200 * DATE/TIME START: 1981-07-31T00:00:00 * DATE/TIME END: 1981-08-31T00:00:00 |
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| Data(s) |
08/02/1984
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| Resumo |
Alteration products of basalts from the four holes drilled during Leg 81 were studied and found to be characterized by the widespread occurrence of trioctahedral clay minerals (Mg smectite to chlorite). In some cases zeolites (analcite, chabazite) are associated with the saponite. A more oxidizing stage is marked by a saponite-celadonite association, presenting the geochemical characteristics of hydrothermal processes. Later stages of alteration are represented by palagonitization and subaerial weathering at two sites. These different alteration processes of basalts from Leg 81 record the paleoenvironment during the first opening stages of the Northeast Atlantic Ocean in the Paleocene-Eocene periods. |
| Formato |
application/zip, 8 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.806988 doi:10.1594/PANGAEA.806988 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Desprairies, Alain; Bonnot-Courtois, Chantal; Jehanno, Celestine; Vernhet, S; Joron, Jean-Louis (1984): Mineralogy and geochemistry of alteration products in Leg 81 basalts. In: Roberts, DG; Schnittker, D; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 81, 733-742, doi:10.2973/dsdp.proc.81.128.1984 |
| Palavras-Chave | #10**3 ln alpha (sample - H2O), unit is per mil; Al; Al2O3; Aluminium; Aluminium oxide; Area; Area/locality; Ca; Caesium; Calcium; Calcium oxide; Calculated based on oxygen number; CaO; Ce; Cerium; Chromium; Co; Cobalt; Comment; Cr; Cs; d18O; d18O H2O; Deep Sea Drilling Project; delta 18O; delta 18O, water; Description; DSDP; Element analysis, neutron activation (NAA); Eocene seawater vs. SMOW, Savin et al. (1981; doi:10.1016/0377-8398(81)90031-1); Escande (1983); Eu; Europium; Fe; Fe2+; Fe2O3; Fe3+; FeO; Hafnium; Hf; Interlayer; Iron 2+; Iron 2+ and 3+; Iron 3+; Iron oxide, Fe2O3; Iron oxide, FeO; K; K2O; La; Lanthanum; Lu; Lutetium; Magnesium; Magnesium oxide; Manganese; Manganese oxide; Mg; MgO; Mineral; Mineral name; Mn; MnO; Na; Na2O; Nd; Neodymium; Ni; Nickel; No O; Number of oxygens; Octahedral; ODP sample designation; Parameter; Point counting with SEM/EDAX; Potassium; Potassium oxide; Rare-earth elements; Rb; REE; Rubidium; Samarium; Sample code/label; Sample vs. SMOW; Sc; Scandium; Si; Silicon; Silicon dioxide; SiO2; Sm; Sodium; Sodium oxide; Ta; Tantalum; Tb; T cal; Temperature, calculated; Terbium; Tetrahedral; Th; Thorium; TiO2; Titanium oxide; Total iron; Yb; Ytterbium |
| Tipo |
Dataset |
