𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A structural cross-section from the Aureole of the Main Donegal Granite

✍ Scribed by D. H. W. Hutton

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
724 KB
Volume
12
Category
Article
ISSN
0072-1050

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Seven phases of deformation are recognised in Dalradian metasediments within the NW aureole of the Main Donegal Granite. Major NW facing F2 folds (the Aghla Anticline and Errigal Syncline) refold an originally NW facing slaty cleavage, which is usually parallel to bedding. D3 structures cross‐cut the major F2 folds and verge and face to the SE on their normal limbs. A fourth phase of deformation intensifies towards the granite contact and is shown to be broadly coeval with intrusion and responsible for a major structure in the aureole. Three later phases are variably developed throughout the aureole. The kinematics of F4 folds in relation to the granite intrusion are briefly discussed.

πŸ“œ SIMILAR VOLUMES

The structural setting of the Main Doneg
The structural setting of the Main Donegal Granite; comments on a recent interpretation
✍ A. R. Berger πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons 🌐 English βš– 226 KB

## Abstract A recent interpretation of the structural geology and chronology of the northwestern envelope of the Main Donegal Granite by Hutton (1977) is critically examined. Although many aspects of this analysis are sound, there remains serious doubt concerning Hutton's main conclusion that the

The structural setting of the main doneg
The structural setting of the main donegal granite; a reply to comments on a recent interpretation
✍ D. H. W. Hutton πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons 🌐 English βš– 198 KB

I thank Dr. Berger for his comments on an earlier paper of mine (Hutton 1977) and welcome this opportunity to clarify and expand on various aspects of that work. Berger (1980) has divided the Creeslough Formation in its type area into a lower 'calcareous' unit (occurring in the SE) and an upper pel

The origin of banding in the Main Donega
The origin of banding in the Main Donegal Granite, N.W. Ireland
✍ A. R. Berger πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons 🌐 English βš– 841 KB

This Caledonian pluton exhibits a regular, sub-vertical banding in which layers of dark, relatively fine grained trondhjernite alternate with layers of light, coarse grained granite. The textures and the presence of cross-cutting bands of granite indicate that the light bands were derived by potash