Origin and evolution of smectites in recent marine sediments of the NE Atlantic. Clay Minerals
the Faeroe Islands are characterized bythe abundance and predominance of smectites. Smectites increase regularly and systematically near volcanic areas. Their origin from (i) meteoric/ deuteric weathering, (ii) hydrothermal products, (iii) neoformation i the marine nvironment or (iv) transformation...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1985
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.613.487 http://www.minersoc.org/pages/Archive-CM/Volume_20/20-3-335.pdf |
| Summary: | the Faeroe Islands are characterized bythe abundance and predominance of smectites. Smectites increase regularly and systematically near volcanic areas. Their origin from (i) meteoric/ deuteric weathering, (ii) hydrothermal products, (iii) neoformation i the marine nvironment or (iv) transformation during their transport o or stay in oceanic regions is considered in a comparative study of three types of environments onor near the Faeroe Islands. These are (1) a basaltic environment where phyllite minerals of deuteric and hydrothermal origin are abundant; (2) a soil environment formed on basaltic flows; (3) a marine sedimentary environment within adjacent sedimentary basins. This investigation clearly shows the link between hydrothermal and deuteric saponite--celadonite i basalt, Fe,Mg-smectite n Faeroe soils and Fe-smectite in marine sediments. A question often considered by geologists (e.g. Yeroshchev-Shak, 1964; Griffin et al., 1968; Rateev et al., 1969) is the abundance, and often predominance, of smectite in clay assemblages within the Icelandic Basin of the N Atlantic. There is general agreement that smectites increase near the emerged basaltic areas of Iceland and the Faeroe Islands. This increase appears to be constant and characterizes Quaternary sedimentation i the NE |
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