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| note on the occurrence of columbite in the Meldon aplite, Devonshire. By OLEG YON K~ORRING, M.Sc. Department...South Devon in April 1951, material was collected from the Meldon aplite quarry near Okehampton, to the...the north-west of the Dartmoor granite, which on examination has proved to contain the mineral columbite...minerals have previously been recorded from the Meldon aplite quarryfl 2 They are partly found as accessory...constituents in the main fine-grained aplite rock consisting of orthoclase, albite, and quartz, or more frequently |
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| niobium-tantalum and other rare-element minerals in the Meldon aplite, Devonshire OLEG VON KNORRING AND ERIC CONDLIFFE...A number of rare-element minerals from the Meldon aplite are described, e.g. native arsenic and antimony...columbite-tantalite series. THE Meldon aplite, near Okehampton, Devon (grid ref. SX 573 927), is a highly...north-west of the main Dartmoor granite (Worth, 1920). This lithium- and fluorine-rich aplite, together...1973, 1976) have given admirable accounts of the Meldon axinite, topaz, Li-A1 micas and lithian tourmaline |
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| GRANITES AND SOME ASSOCIATED ROCKS FROM SOUTHWEST ENGLAND I. A. MILLER AND P. A. MOHR New isotopic age determinations...determinations on all the granites of southwest England are presented and discussed in relation to the...INTRODUCTION The Hercynian granites of southwest England have in part been the subject of potassiumargon...the period of the Hercynian orogeny in southwest England in relation to other parts of Britain and Europe...concordant with the tectonic grain of southwest England, and six major domes have risen froin it to form |
 | Edmons, E. A., Wright, J. E., Beer, K. E., Hawkes, J. R., Williams, M., Freshney, E. C., Fenning, P. J. (1968) Geology of the Country around Okehampton (Explanation of One-inch Geological Sheet 324, New Series) Memoirs of the Geological Survey. Institute of Geological Sciences | Report (issue) |
| SURVEY OF GREAT BRITAIN ENGLAND AND WALES Geology of the Country around OKEHAMPTON ( Explanation of One-inch...Beche. His 'Report on the Geology of Cornwall, Devon, and West Somerset' (1839) was the first memoir of the...other early Geological Survey maps of south-west England, are undated, but it is believed that they were...(1956), 'The Metalliferous Mining Region of South-West England'. The district formed part of the area in which...geophysical methods. In 1962 the newly formed South-West England field unit, successively under Dr. F. B. A. |
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| . . . . . . . . . . . . . . . . . . T h e Meldon Aplite . . . . . . . . . . . . . . . . . . . . . ....Geology of (2) (3) (4) (5) (6) (7) (8) Cornwall, Devon, & W e s t S o m e r s e t ' p. 501. 1888. S m J...1895. R. N. WO~T~, ' Notes on the Geology of Okehampton ' Trans. Devonshire Assoc. vol. xxvii, p. 306...notes comprises as much o[ the watershed of the West Okement and the Redaven as lies between the London...Railway-line on the noldh and, on the south, the 'Roof of Devon,' the Yes Tor-High Wilhays ridge; practically it |
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| Some aspects of Engineering Geology in South West England Chairman's Introduction ... ... ... 356...Engineering geology in reservoir construction in South West England. By J. L. Knill. ... ... ... 359 The influence...weathering on the layout of quarries in South West England. By W. R. Dearman and P. G. Fookes. ... ...... 372 Some examples of cliff failure in S.W. England. By H. M. de Freitas. ... ... ... ... 388 Geological...problems in the china clay industry of South West England. By M. J. Ripley. ... ... 405 The geological |
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| the speci es. Locality. including name of mine or quarry, nearest town and county, and six figure National...Loanhead quarry TallskerBay Whyte'a Cleuch Loanhead quarry Port Glasgow Loanheadquarry Loanhelld quarry Loanhead...Loanhead quarry Benalltmlne BMS NATIONAL REFERENCE COUECTION Ecton.Staffs. Ecton.Staffs. Scordale,Cumbria...Beach Clevedon Beach Clevedon Beach Clevedon Beach Meldon apllte q. Fallowfield mine East Gunnislake Struan...Avon Bristol.Avon Bristol.Avon Bristol.Avon Okehampton,Devon Hexham,Northumbr. Cornwall Cutting on A863 |
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| _ _ _ _ _ _ _ _ _C'-o_ll_!l_ty._Arizona, U.S.A ALBITE Rich orange-red masses with darker Kragero Norway...FLUORESCENT ½ x ½ ins rock Fluorescent green Al SiO Devon England Large brown well formed dodecahedral Madagascar...hard white sphere shaped nodule. Newhaven Sussex, England lxlins S0p ALUMINITE Al SO/4 ALUMINOTSCHERMAKITE...- - - AMAZONITE Pure green cleavage Landsverlc quarry, Evje, Norway lxl S0p ALAMOSITE fcLp 10 g:...PbAgSbS lx2 S0p 2x2 £1 2x3 £I .SO Staffordshire England Rich white to faintly blue masses ANHYDRITE CaSO |
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| ^MINERALS, ROCKS and GEMSTONES \in Cornwall and Devon |'; '’i '■-■ ,, t Cedric Rogers A Collector’s...MINERALS, ROCKS AND GEMSTONES in Cornwall and Devon Cedric Rogers i D. BRADFORD BARTON Truro LTD... MINERALISED ILPMACOMar AREAS of CORNWALL & DEVON Main. Concentrations of mints. (has Hine. fnaxt*...Lizard .. North and Central Cornwall East Cornwall Devon 26 27 28 29 30 31 32 33 34 35 MAPS 36 39 APPENDIX...experienced collector who is unfamiliar with Cornwall and Devon should find helpful. There has been no attempt to |
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| Spinel crystals from madgascar.Mottramite from England .Cut and polished Labradorite.Tacharanite and Tobermorite...ingots on a ship wreck in 1885 St Ives. Cornwall. England Rich fine grained black crystalline mass Mount...orange-red masses with darker Kragero Norway 1x2 50p 2x2 ALBITE 6 Hornblende____________________ £1.20 Feldspar_____________...501 A x A ins rock Fluorescent green Al SiO Devon England FLUORESCENT Large brown well formed dodecahedral..._______ Ba Ca 00/3__________ Newhaven Sussex, England lxlins50p 1x2 £1 Pure hard white sphere shaped |
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| Igneous Rocks of South-West England THE GEOLOGICAL CONSERVATION REVIEW SERIES The comparatively small...and M. C. Gyopari S. Igneous Rocks of South-West England P. A. Floyd, C. S. Exley and M. T. Styles 6...Thames D. R. Bridgland Igneous Rocks of South-West England P. A. Floyd Department of Geology, University...study, or criticism or review, as permitted under the UK Copyright Designs and Patents Act, 1988, this publication...licences issued by the Copyright Licensing Agency in the UK, or in accordance with the terms of licences issued |
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| of zircons from the Cornubian Batholith of SW England and comparison with zircons from other European...Natural History Museum, Cromwell Road, London SW7 5BD, UK Camborne School of Mines, College of Engineering...Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, UK [Received 13 March 2015; Accepted 17 December 2015;...of the late-Variscan Cornubian Batholith in SW England was analysed for W, P, As, Nb, Ta, Si, Ti, Zr,...topaz granites from the St. Austell Pluton, Meldon Aplite and Megiliggar Rocks are slightly enriched in |
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| 1600 hours each day at 7, Condor Way, Burgess Hill, West Sussex Tel: 01444 233958 (Pre-view on Saturday March... £1 A3 A3 £1 £3 A3 A3 A3 A3 £1 £1 £1 £1.50 West Caradon Cornwall Wheal Jane, Cornwall Greystones...(Cook) Herodsfoot Cornwall Bournonite Bedford Mine Devon Arsenoovrite Colorado USA Enaraite Minas Gerais...Xtl & Wheal Busy Chlorite (Fisher) Belstone Qy, Devon Arsenopyrite & Garnet Colarado, USA Covellite &...Plymouth Maerdv Coal Tios, S. Wales Walkam Unted Mine, Devon Siberia A? A7 A8 A8 A8 A8 A8 £3 £2 £2 £1 £1 £1 |
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| ium mica granite (Tre gonning), leucogranite and aplite. Lithium -mica gra nite is believed to have been...roof and the evidence for several genera tions of aplite-pegmatite bodies. Department of Geology. The University...finergrained than the typical granites of south-west England, but they do not recognise the Tregonning 155.../ -, '/ / I Godolphin Hil l, ,'/ I • • '-Quarry " :' / F/ , / -, Balwest. / ::::-==-,~= , / -...Roof Complex. The contact dips 12-15° to the west-south-west. The dominant cleavage in the pelites, formerly |
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| Bavenite from the Meldon aplite quarries, Okehampton, Devonshire. THE Meldon aplite quarries are situated...the Red-a-yen Brook about 289miles south-west of Okehampton on the northern border of Dartmoor. Worth...I by four counter-dipping aplite dykes. ! On the southern side of the quarry I the dip of the dykes is...the northern face is 010 approached. Here both aplite and calc I~o12o flinta are crossed by a strong...lined with thin films of axinite, but on entering aplite these spread out as reaction veins up to 2 inches |
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| Be Silicate.2mm to 3mm brown crystal section in Albite with Ilmenite and or Magnetite. (Tuftane Evje Norway)...CO/3 OH blue micro crystals on rock. (Greystones Quarry,Lezant,Cornwall) £2.00 lx H £3.50 2 076 CALEDONITE...Quartz with micro spots of Native Copper. (Kingston Quarry,Cornwall) 1x1 £2 553 TETRAHEDERITE (Cu Fe) Sb S...cleavages with cerussite and or Pyrolusite (Merehead Quarry, Mendips,Somerset) H x B £2 269 MENDIPITE Pb/3...CORKITE Pb Fe PO/4 SO/4 This is a rare mineral for England, deep yellow radiations in goethite (Iron Crag |
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| norm-basis, represents orthoclase 34 per cent, albite 12 per cent, basifying constituents 24 per cent...described vanadiferous clays and marls from South Devon, and McClintock comments on the possible relationship...xenoliths of phosphatic shales (1923, 148) in the Meldon aplite. More than twenty years ago Hillebrand (1910...that these rocks are somewhat more permeated by albite than corresponding near-surface facies. Available...differentiate from basaltic magma should veer towards the " albite " pole as biotite is eliminated ; but, as already |
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| Science, Plymouth Polytechnic, Plymouth, PL4 8AA, Devon. PROCEEDINGS OF THE USSHER SOCIETY VOLUME FOUR...Co., Kyrtonia Press, 115 High Street, Crediton, Devon CONTENTS CHAIRMAN'S REPORT......................formation of small-scale tectonic structures in south Devon (Abstract). By D.M. Hobson........................of the late Triassic - early Jurassic sequence in west Somerset. By G. Warrington.......................... 157 The Variscan granites of south-west England: a progress report. By J. R. Hawkes and J. Dangerfield |
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| Upper Culm Measures THE IGNEOUS ROCKS (a) The Meldon District (b) The Petertavy District 4. THE STRUCTURE...Unit The Petertavy Unit The Lydford Unit . The Meldon Unit . Structural Interpretation (f) The Breccia-Fault...established within the country rocks bordering the north-west corner of the Dartmoor granite mass. Upper Devonian...two to three miles wide, which borders the north-west comer of the Dartmoor granite mass in Devonshire...from South Tawton on the north to Tavistock on the west of the granite (Fig. 1). Sedgwick & Murchison (1840) |
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| non-member subscription rates for this volume are: UK £13 (including P&P) and Overseas £15 (including P&P)...proudly displaying a copy of Minerals of Northern England. Roy Starkey photograph. Journal of the Russell...Herderite-hydroxylherderite series minerals from Chywoon Quarry, Cornwall Tom F. Cotterell, Neil Hubbard and David...herderite-hydroxylherderite series minerals, from Chywoon Quarry, in Cornwall. There are, however, four other Cornish...cross the Irish Sea and travel to the far south-west of the Emerald Isle, to Ballybunnion, in County |
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| Kragero Norway Rich orange-red masses with darker 6 ALBITE £L. 2~ . Fel~sp.ar Hornblende .. _. · -·· •·-•...hard white sphere shaped nodule. Newhaven Sussex, England 12 ALUJ\JINITE lxlins50p lx2£I 2x2£2.S0 Al SO/4...--- · - · · ··· _ 2x3 £I .SO 2x2£1 Staffordshire England lx2 S0p Rich white to faintly blue masses 23 Al'\HYDRITE... _ . Pure black mica plate new Analysis , Saga Quarry. Tvedalcn near Ix I £3 I x2 £6 2x2 £ 12 7 AN!lilTE...AXINJTE Very rich light brown massive with some Meldon Aplite Quany, lx240p 2x280 2x3 £1.50 3x4 £3 Ca Fe Al |
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| Hosking: “The recent search for ore deposits in S.W. England.” 129. *Dr. W. R. Dearman : “Tectonic fluting structure...S.W. England.” 136. *Dr. E. C. Freshney and Mr. P. J. Fleming : “The Petrockstow Basin, N. Devon.” 137...Westphalian of North Devon.” 140. *Dr. R. L. Austin: “New conodont horizons in S.W. England.” 141. *Mr. J....in South Devon.” 148. *Mr. M. Williams : “The New Red Sandstone outlier of Hollacombe, W. Devon.” 149....Braithwaite : “Possible Permian sediments in South West Devon.” OBITUARY Dr. Frederick James Winsor Holwill |
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| British Regional Geology I * South-West England r * FOURTH EDITION e ■ - O ” ..y 1835 Geological...British Geological Survey Front cover: Bull Point, Devon (For full explanation see p. ix) NATURAL ENVIRONMENT...and Mr. G. Bisson (District Geologist, South-West England), as well as Professor W. R. Dearman and the...advances in our knowledge of the geology of south-west England. Most of the great expanse of Carboniferous...as oil companies turn their attention to the seas west of Britain, so attention is increasingly focused |
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| 38, PP. I79-85 Feldspars from the Meldon aplite, Devonshire, England M. NAWAZ CHAUDHRY Department of Geology...Geology, University of the Panjab, Lahore, West Pakistan SUMMARY. Chemical analyses of nine K-feldspars...diagrammatically. THE Meldon aplite, near Okehampton, Devonshire, is a soda-lithia aplite dyke about 2o-5 m...thickness, occurring I km north-west of the main Dartmoor granite. Albite, quartz, mica, and K-feldspar...accessory minerals of the aplite. The aplite is divided into three types: the 'blue aplite', a marginally chilled |
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| regional geochemical reconnaissance of South-west England. By P. L. Lowenstein and R. J. Howarth. ...... 478 Muscovite (‘Gilbertite’) from the Meldon aplite. By M. Nawaz Chaudhry and R. A. Howie. ... ....Geophysical surveys over two ore-bodies near Tavistock, Devon. By E. M. Durrance. ... ... ... 495 The sequence...... 521 Correlation of fold phases in S.W. England. By David J. Sanderson. ... ... ... ... 525 ...Pleistocene section west of Tregunna House. By B. B. Clarke. ... ... ... 551 Loess in Devon. By T. R. Harrod |
Meldon Aplite Quarry, Okehampton Hamlets, West Devon, Devon, England, UK