 | | Journal (article/letter/editorial) | | 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...accessory constituents in the main fine-grained aplite rock consisting of orthoclase, albite, and quartz, or |  | | Journal (article/letter/editorial) | | AND DEVON: C.J. MOON Moon, C.J. 2018. Geochemistry of Caesium and Fluoride in Cornwall and Devon: Evidence...Evidence from TellusSW. Geoscience in South-West England, 14, 150–160. The TellusSW geochemical survey...soils and water as well as fluoride in waters. Devon and Cornwall are one of the most enriched areas...reflects Cs concentration in fine-grained granite of west Dartmoor, late stage Li-F rich granites in St Austell...mineralisation as well as forming a broad high in mid-Devon, spatially related to the occurrence of lamprophyres |  | | Journal (article/letter/editorial) | | 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...1976) have given admirable accounts of the Meldon axinite, topaz, Li-A1 micas and lithian tourmaline. Chaudhry |  | | Journal (article/letter/editorial) | | . . . . . . . . . . . . . . . . . . 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 |  | | Journal (article/letter/editorial) | | (a) Previous Work THE Lower New Red Sandstone of Devon outcrops in a north-south band near Torquay to Exmoor...Devonian and Culm. Westwards of Tiverton and again west of Exeter the outcrop extends into the Culm synclinorium...Ussher (1906) divided the Lower New Red Sandstone of Devon into: 3. Lower Sandstones 2. Breccio-conglomerates...distinguished from the porphyritic granite of the West of England ". A granitic origin has been attributed to... The sediments were laid down in a shallow east-west basin, the later beds overlapping the earlier on |  | | Journal (article/letter/editorial) | | 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,...wt.% ThO2. Zircon from topaz granites from the St. Austell Pluton, Meldon Aplite and Megiliggar Rocks are |  | | Book | | ^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 |  | | Catalog/List | | 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...with Chrysotile, pale grey-green County Bridge Quarry,Lizard ,Cornwall MgFeSiO massive. Minas Gerias |  | | Catalog/List | | 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 |  | | Catalog/List | | 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...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...Arizona Pure green cleavage AMAZONITE Landsverk quarry, Evje, Norway Ixl 50p lx2£l 11 felspar group____________ |  | 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. |  | | Book | | 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 |  | | Journal (volume) | | 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 |  | | Journal (article/letter/editorial) | | 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. / ::::-==-,~= , / -...Tregonning granite-a nonporphyritic lithium rich, topaz-bearing granite exposed on the coast between Praa |  | | Journal (issue) | | 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 |  | | Catalog/List | | 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...rich white masses intergrown with Weymouth,Dorset,England JxJ 60p lx2 2x2 2x3 £4 46 BASALUMINITE AISO/4 OH |  | | Catalog/List | | 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...metallic fibrous on' 2cm white dolomite. ' (Lengenbach Quarry,Binn Valley Switzerland) £4.50 163 GALENA Lead |  | | Journal (article/letter/editorial) | | was read : - ' The Geology of the Meldon Valleys, near Okehampton, on the Northern Verge of Dartmoor...main railway-line, from a point a little east of Meldon Viaduct to near Sourton, and the ridge of Dartmoor...slight local deviations, strike north-east and south-west and dip north-westwards, the mean angle of dip being...is wollastonite, but at contacts ~ with the Meldon Aplite garnet, idocrase, seapolite, axinite, and lepidolite...(c) Granitoid veins, subdivided into: (1) The Meldon Aplite and its associates ; (2) Fine-grained granites |  | | Journal (article/letter/editorial) | | JUNE I 9 7 0 , VOL. 3 7 , NO. 2 9 0 Topaz from the Meldon aplite, Devonshire M. NAWAZ CHAUDHRY Department...Department of Geology, University of the Panjab, Lahore, West Pakistan and R. A. HOWIE Department of Geology,... THE Meldon aplite, near Okehampton, Devonshire, England, is a sodium- and lithium-rich aplite dyke about...minerals, the aplite also contains accessory topaz, elbaite, apatite, and petalite. The main aplite dyke is...Some of these veins contain important amounts of topaz whereas others contain elbaite. Chemistry. The |  | | Journal (article/letter/editorial) | | communication was read :— " The Geology of the Meldon Valleys, near Okehampton, on the Northern Verge of Dartmoor...main railway line, from a point a litte east of Meldon Viaduct to near Sourton, and the ridge of Dartmoor...occupied by Black Tor, High Wilhays, Tes Tor, and West Mill Tor, being the greater part of the valley of...of the Redaven and a portion of the valley of the West Okement. The southern extreme of this area is occupied...slight local deviations, strike north-east and south-west and dip north-westwards, the mean angle of dip being |  | | Catalog/List | | 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 |  | | Journal (issue) | | 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 |  | | Journal (article/letter/editorial) | | 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...m in thickness, occurring I km north-west of the main Dartmoor granite. Albite, quartz, mica, and K-feldspar...elbaite, topaz, fluorite, apatite, and petalite are the accessory minerals of the aplite. The aplite is divided |  | | Journal (issue) | | 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 |  | | Report (edition) | | 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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