The Caledonian history of the north-eastern Irish Sea region and its relation to surrounding areas

Simpson, Alexander

doi:10.1144/sjg04020135

Cited by 22 publications

(4 citation statements)

References 64 publications

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“…In some localities, however, recrystallisation becomes significant, generally with the crystallisation of low-grade micas and more rarely biotite. The highest grade rocks occur in the centre of the Isle of Man where Simpson (1964) reported .the porphyroblastic growth of mica, cordierite, chloritoid and garnet.…”

Section: The Distribution Of Facies In the Southernmentioning

confidence: 99%

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A metamorphic map of the British and Irish Caledonides

Fettes

1979

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Summary The metamorphic rocks of the British and Irish Caledonides fall into two groups. The first group constitutes the northern belt. These rocks have been subjected to a lower Ordovician metamorphism (Grampian event of Lambert & McKerrow 1976) which was probably, in part at least, diachronous. The metamorphic pattern ranges from the low- to the intermediate-pressure facies series and from the low greenschist- to the upper amphibolite-facies groups. The distribution of facies within the belt is complex and may relate to a depth-controlled metamorphism with locally induced thermal highs. The second group constitutes the southern belt. Here the rocks have been subjected to a late-Silurian event which, in general, causes slight crystallisation but very locally rises to upper greenschist facies.

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Section: The Distribution Of Facies In the Southernmentioning

confidence: 99%

“…The rocks were deformed and locally recrystallised in the late-Silurian. Simpson (1968) has suggested the north Irish Sea area also suffered an earlier, Ordovician event.…”

Section: Southern Beltmentioning

confidence: 99%

A metamorphic map of the British and Irish Caledonides

Fettes

1979

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“…It is, therefore, probable that rocks, physically like those at outcrop, extend downwards a further 10 km. One possibility is a northerly continuation of the Manx-Skiddaw sequence (Tremadoc-Llanvirn)-estimated 18 km thick and perhaps evidenced by the Coldingham Beds in Berwickshire (Simpson 1968). Similar criticism applies to Fitton and Hughes' (1970, fig. 3) model.…”

Section: -2 8-0mentioning

confidence: 99%

A model for the Lower Palaeozoic evolution of the southern margin of the early Caledonides of Scotland and Ireland

Powell

1972

SJG

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“…(2006) and Woodcock and Soper (2006). The deformation history of the Lower Palaeozoic rocks has been analysed by Simpson (1963, 1968) and Fitches et al . (1999), among others.…”

Section: Introductionmentioning

confidence: 99%

Tectonic structures in the Peel Sandstones and Carboniferous limestone, Isle of Man

Fitches¹

2010

Geological Journal

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On the Isle of Man, the Early Devonian Peel Sandstones and Early Carboniferous limestones have been deformed in places by folds, cleavage and other structures. The structures in the Peel Sandstones have been attributed to pre‐lithification deformation associated with slumping of the red beds. Here, they are re‐interpreted to be products of post‐lithification deformation, inferred from small‐scale structures and fabrics, which took place in a localized thrust zone. Compression was approximately NW–SE and translation towards the SE. That deformation may have also produced some of the late structures in the Lower Palaeozoic rocks of the island. The minimum age of these post‐Early Devonian structures is unknown but is probably pre‐Carboniferous: they may represent the mid‐Devonian Acadian deformation. The Carboniferous succession is folded in places and contains stylolites and stylolitic cleavage. A stress regime with E–W to WNW–ESE compression is inferred. These structures have orientations and morphologies shown to resemble those in neighbouring parts of southern Britain, where they are attributed mainly to mid‐ to late‐Carboniferous Variscan events. Alternatively, some or all of them might be products of late Mesozoic and Tertiary tectonics recognized elsewhere in the region. Copyright © 2010 John Wiley & Sons, Ltd.

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The Caledonian history of the north-eastern Irish Sea region and its relation to surrounding areas

Cited by 22 publications

References 64 publications

A metamorphic map of the British and Irish Caledonides

A metamorphic map of the British and Irish Caledonides

A model for the Lower Palaeozoic evolution of the southern margin of the early Caledonides of Scotland and Ireland

Tectonic structures in the Peel Sandstones and Carboniferous limestone, Isle of Man

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