...Douglas Robinson Abstract Contact metamorphism of Carboniferous rocks by the Whin Sill in Upper Teesdale is documented utilizing boreholes drilled in the 1960s ground investigation for the Cow Green reservoir. Hedenbergite, prehnite and datolite are recorded for the first time, and the first...

...G. A. L. Johnson; K. C. Dunham SUMMARY By definition, sills are concordant, tabular sheet-like bodies of igneous rock with the Great Whin Sill of northern England often quoted as a primary example. Analysis of surface and subsurface records of the Great Whin shows that it is seldom concordant over...

...D. W. Holliday Abstract The term sill nowadays employed for a broadly concordant igneous intrusion is widely believed to have been derived from the local term for persistent hard beds in the Carboniferous sequence of NE England, in particular the Whin Sill. Despite the intrusive origin of the Whin...

... with microstructural observations and stress inversion analyses, together with Re–Os sulfide geochronology show that the vein-hosted mineralization (apart from barium minerals) was synchronous with a phase of north–south extension and east–west shortening coeval with emplacement of the Whin Sill ( c . 297–294 Ma...

...D. Liss; W.H. Owens; D.H.W. Hutton Abstract A large-scale palaeomagnetic study (125 specimens from 88 sampling localities) has been carried out on the Whin Sill complex and its associated dykes in northern England. The dominant carrier of remanent magnetization of the doleritic rocks is relatively...

...Douglas Robinson Abstract Prehnite is recorded for the first time from the contact aureole of the Whin Sill intrusion in Teesdale, northern England. An electron microprobe study of the prehnite has shown an overall range of Fe 2 O 3 (total iron) from below the detection limit to 8.3 percent...

...B. A. O. Randall Abstract The Whin sill, a dolerite intrusive into the Carboniferous of northern England, shows a fairly simple pattern over most of its length of some 20 0 miles, but in the region of the North Tyne it becomes more complex and consists of a series intruded at various levels...

... a likely alkali magmatic contribution to the post-Whin Sill orefield, contrasting with most other Hercynian Mississippi-type orefields in UK. Creaney's mapping of rank of early Namurian coals above the two central cupolas of the granite implied high temperatures of over 200°C just prior to the Whin Sill...

...Fig. 2.  ( a ) Sketch map of the outcrops of the Great Whin Sill and associated dykes. H, Hett Dyke; HG, High Green Dyke Echelon; HI, Holy Island Dyke Echelon; SO, St. Oswald's Chapel Dyke Echelon. ( b ) Depth to the base of the Great Whin Sill below the Westphalian B–C boundary. ( c ) Total...

...), 267.5 m of Lower Carboniferous strata (including the Whin Sill), and 723.5 m of the Weardale Granite (Devonian), with vein mineralization occurring to 913 m. Unlike previous geothermal investigations of UK radiothermal granites that focused on the hot dry rock concept, the Eastgate Borehole was designed...