Internal structure of the Erlend Tertiary volcanic complex, north of Shetland, revealed by seismic reflection
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doi: 10.1144/gsjgs.141.3.0555 |
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| Authors: | Gatliff, R. W.; Hitchen, K.; Ritchie, J. D.; Smythe, D. K. |
| Author Affiliations: | Primary: Br. Geol. Surv., Edinburgh, United Kingdom |
| Volume Title: | Journal of the Geological Society of London |
| Source: | Journal of the Geological Society of London, Vol.141(Part 3), p.555-562. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649 |
| Publication Date: | 1984 |
| Note: | In English. 13 refs.; illus. incl. 1 table, sect., sketch maps |
| Summary: | Detailed offshore seismic reflection mapping 100 km N of Shetland revealed a large subcrop of Palaeocene (53-55 m.y.) basalts proved by exploratory drilling. A vent of approx 2 km diameter, surrounded by radially outward-dipping basalts, is centred over the Erlend igneous complex, and a second, more deeply eroded volcanic centre is postulated by interpretation of seismic data and by gravity modelling. An approximately cylindrical mafic or ultramafic pluton is inferred to underlie each of the two centres, the diameter of the Erlend pluton being approx 14 km and that of West Erlend approx 5-7 km. The seismic stratigraphy of volcanic rocks may be of particular relevance to hydrocarbon exploration. [R.A.H.] |
| Subjects: | Basalts; Cenozoic; Energy sources; Eocene; Exploration; Geophysical methods; Geophysical surveys; Gravity anomalies; Gravity methods; Holocene; Igneous rocks; Intrusions; Mafic composition; Magnetic anomalies; Ocean floors; Oceanography; Offshore; Oligocene; Paleocene; Paleogene; Petrology; Plutonic rocks; Plutons; Pyroclastics; Quaternary; Reflection methods; Rhyolites; Seismic methods; Surveys; Tertiary; Tuff; Ultramafics; Volcanic rocks; Volcanoes; Atlantic Ocean; Atlantic Ocean Islands; Europe; Great Britain; Scotland; Shetland Islands; United Kingdom; Western Europe; Erlend Complex; Faeroe-Shetland Escarpment |
| Coordinates: | N610000 N620000 W0000000 W0030000 |
| Abstract Numbers: | 84M/3341 |
| Record ID: | 1985081105 |
| Copyright Information: | GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom |
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