INTERBASALT IC CLAYS FROM THE FAEROE ISLANDS, NORTHEASTERN ATLANTIC
A B STR ACT: Mineralogical nd chemical examination of Tertiary interbasaltic clays from the Faeroe Islands revealed three types of alteration of volcanic tufts and basalts: (1) Argillization of volcanic tufts within a lacustrine nvironment resulted in the formation of aluminous beidellites and metah...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1986
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.620.7701 http://www.minersoc.org/pages/Archive-CM/Volume_22/22-1-63.pdf |
| Summary: | A B STR ACT: Mineralogical nd chemical examination of Tertiary interbasaltic clays from the Faeroe Islands revealed three types of alteration of volcanic tufts and basalts: (1) Argillization of volcanic tufts within a lacustrine nvironment resulted in the formation of aluminous beidellites and metahalloysites; these clays are associated with extensive coal ayers at Suduroy. (2) Argillization of volcanic tufts due to hydrothermal ction resulted in the formation of thick layers of ferriferous beidellites associated with small amounts of hematite and zeolite (e.g. at Nolsoy). (3) Meteoric alteration of volcanic tufts and basalts, which took place under hot climatic onditions and contrasting seasons, led to the development of ferriferous and aluminous-ferriferous beidellites, metahalloysite, kaolinite, hematite and goethite in low (Hov profile) or high (Oravik profile) topographical positions. The three processes occurred individually or were superimposed. The Faeroe archipelago in the northeastern part of the Atlantic Ocean contains numerous red Tertiary interbasaltic beds (Rasmussen & Noe-Nygaard, 1970; L6vlie, 1975). Rubified formations of the same age and comparable composition have been studied on the Iceland- |
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