| Reference Type | Journal (article/letter/editorial) |
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| Title | The British Caledonides: interpretations from Cenozoic analogues |
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| Journal | Geological Magazine |
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| Authors | Mitchell, A. H. G. | Author |
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| Year | 1984 (January) | Volume | 121 |
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| Issue | 1 |
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| Publisher | Cambridge University Press (CUP) |
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| DOI | doi:10.1017/s0016756800027928Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 252305 | Long-form Identifier | mindat:1:5:252305:1 |
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| GUID | 0 |
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| Full Reference | Mitchell, A. H. G. (1984) The British Caledonides: interpretations from Cenozoic analogues. Geological Magazine, 121 (1) 35-46 doi:10.1017/s0016756800027928 |
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| Plain Text | Mitchell, A. H. G. (1984) The British Caledonides: interpretations from Cenozoic analogues. Geological Magazine, 121 (1) 35-46 doi:10.1017/s0016756800027928 |
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| In | (1984, January) Geological Magazine Vol. 121 (1) Cambridge University Press (CUP) |
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| Abstract/Notes | AbstractRecent interpretations of Cenozoic arc systems and collision belts facilitate reinterpretation of some aspects of British Caledonide evolution. End-Cambrian ‘Grampian’ collision of the passive ‘Dalradian’ foreland following southeastwards subduction beneath an island arc was accompanied by initiation of the Highland Boundary Fault as a high-angle south-directed oblique-slip thrust. Mid-Ordovician to early Devonian northwestward oblique subduction of the Iapetus Ocean beneath the Grampian orogen resulted in a continental margin magmatic arc, back-arc thrusting and development of an accretionary prism, while southeastward subduction led to arc magmatism and back-arc extension followed by initiation of the Rheic Ocean as a back-arc marginal basin; this syn-subduction N–S asymmetry of the Iapetus Ocean margins was analogous to the E–W asymmetry of the modern Pacific. Closure of Iapetus was diachronous, earlier in the northeast: during end-Silurian collision the southern Caledonides behaved as a passive foreland; post-collision foreland thrusting resulted in deposition and deformation of Lower Old Red Sandstone foreland basin deposits in Wales, and probably in northwest-directed back-thrusting in the region of the Longford-Down accretionary prism. Subsequent dextral movement in the suture zone juxtaposed the southern Caledonides with Scotland and northern Ireland, beneath which northwestward subduction had continued into the early Devonian. |
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