 | | Journal (article/letter/editorial) | | 260 Metasomatism of cherts on the north-west margin of Dartmoor, Devonshire By M. A. EL SHARKAWI1 and...Dartmoor granite in the neighbourhood of Meldon, near Okehampton, Devon. Development of biotite by contact...elements is maintained in later phases: wollastonite-diopside reaction zones may enclose cores of blackand-white...mineralizing fluids. Finally, veins with datolite-diopside, datolite-grossular-idocrase, and datolite-grossular-zeolite...Carboniferous). They described outcrops of chert at the north-west margin of the Dartmoor granite t h a t had been |  | 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. |  | | 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 | | 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____________ |  | | Journal (article/letter/editorial) | | SKARNS FROM THE NORTH-WEST BORDER OF THE DARTMOORGRANITE,DEVONSHIRE,ENGLAND M. A. H. EL SHARKAWl...within the contact metamorphicaureole on the north-west margin of the Dartmoor granite. Tin is concentratedin...SnO2, centeredon the Red-a-yen Mine at Meldon near Okehampton,lies within a much wider zone of iron-metasomatism...Geochemical prospecting(4) has shownrecentlythat at Meldon the same deposits havea lenticularshapeconfinedwithinthe...the confluence of the Flushcombe Brook with the West Okement River. The mine "In 1870 was 24 fathoms |  | | Journal (article/letter/editorial) | | 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) |  | | Catalog/List | | rful , 18 miles NNW of St I cm £6 Ives. Cornwall. England No location details !cm £4 Colo urless to yellow...Ix ! £4 l x2 £8 New East Wheal Russell mine, Devon ,Eng land Madagascar ½ x½ £2.50 lins£4 I x½ £4...near Creston . Wyoming ,U.S. A Newhaven Sussex, England l x l £3 l x2 £5 While crystals well covering...paper available. Rich grey crystalline mass. Saga Quarry, Tvedalen near Larv ik, Norway Ix I £1.50 Ix I...Chrysotile. pale grey-green mass ive. County Bri dge Quarry,Lizard ,Cornwall Jx I £ I I x2 £2 Loch Scridain |  | | 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 |  | | Catalog/List | | No. Byways, 20 Burstcad Close, Cobham, Surrey, England KTll 2NL EMAIL 2007 104 Phone 01932 862340 ...THAUSITE Modum, Buskerud,Norway 59 BOEHMITE Saga Quarry, Tvedalen, Norway Brown-purple mass in matrix Creamy...-·-··-·-· ---·7 ANNITE Saga Quarry, Tvedalen near Larvik, Norway 696 CHROME DIOPSIDE Outokumpu Finland Pure...lx2 £15 lxl £4 lx2 £8 2x2 £16 126 DIASPORE Saga Quarry, Tvedalen. Norway 1060 KORNERUPINE Bjordammcn,...near Kragero,Norway Many small silvery flakes in Diopside lxl£1.50 lx2£3 2x2£6 C - - -- - - -- - -- - -· |  | | Catalog/List | | EOCKS AHD MINERALS Ho U available. NEW STOCK Devon and Cornwall pages 8 S 3 : ALLOPHANE, ARTHURITE...Cu Al AsO SO/4 small green plates in and on rock (West Caradon Mine,Cornwall) » x H £4 510 CHALCOCITE copper...Quartz with micro spots of Native Copper. (Kingston Quarry,Cornwall) 1x1 £2 - 553 TETRAHEDERITE (Cu ?e) ;'L...cleavages with cerussite and or Pyrolusite (Merehead Quarry, Mendips,Somerset) 54 x 54 £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 |  | | Journal (article/letter/editorial) | | Axinites from the contact skarns of the Meldon aplite, Devonshire, England M. NAWAZ CHAUDHRY Department of Geology...Geology, University of the Panjab, Lahore, West Pakistan AND R. A. HOWIE Department of GeoIogy, King's...of the specimens investigated. THE Meldon aplite, near Okehampton, Devonshire, is a sodium- and lithium-rich...the main Dartmoor granite (Worth, I92O). In the Meldon aplite quarries (commonly known as the granulite...northeast, and with the calcareous shales to the north-west. Samples were collected from each of the skarns |  | | Journal (issue) | | Transgression of the Cretaceous sea in South-West England. By J. M. Hancock. … 61 The Cretaceous structure...W. England (Abstract). By D. J. C. Laming. … … 111 Tergiversate folds from South-West England. By...CHAIRMAN'S REPORT Geological Research in South-West England, 1969 The eighth Conference of the Society was...Transgression of the Cretaceous sea in South-West England. On Tuesday, 7th January Professor M. R. House...geological and geomorphological problems in the South-West; 64% were from University staff and associated research |  | | Catalog/List | | _1_0_0_ Byways, 20 Burstead Close, Cobham, Surrey, England KTll 2NL EMAIL ·_-2_0_0_6__, -· Phone 01932...Lochinver, Scotland 12 ALUMINITE Newhaven Sussex, England / MAGNESIOHORNBLENDE, dark green fibrous mass....------------6 ALBITE Kragero Norway 933 ANATASE Hingston Quarry,Comwall Black micro crystals in crystalline feldspar...501 ALLOPHANE New East Whcal Russell mine, Devon ,England variety VIRIDINE (Mangan rich variety) Olive... £4 lx2 £6 Ca SO/4 23 ANHYDRITE Staffordshire England Rich white to faintly blue masses lx2 80p 2x2 £1 |  | | Catalog/List | | I Byways, 20 Burstead Close, Cobham, Surrey, England KTll 2NL Phone 01932 862340 EMAIL richard.tayler@minerals...£5 -------------------------933 ANATASE Hingston Quarry,Comwall Black micro crystals in crystalline feldspar...501 ALLOPHANE New East Wheal Russell mine, Devon ,England grey bleby small botryoidal with possible Brochantite..._--~(~OI_~·-·· · -·- ·· ···ALUMINITE Newhaven Sussex, England Pure hard white sphere shaped nodule. Ixlins80p..._ _P_b_so_,_4____ 23 ANHYDRITE Staffordshire England Rich while to faintly,bluemasses lx2~0p ________ |  | | Report (issue) | | anomalies and mi nera I isation at Sou rton Tors, Okehampton, Devon REPORT No. 76/1 HMSO The Institute of...anomalies and mineralisation at Sourton Tars, Okehampton, Devon K. E. Beer and P. J. Fenning London: Her...anomalies and mineralisation at Sourton Tors, Okehampton, Devon. Rep. Inst. C;eol. Sci., No. 76/1, 38 pp....and ST-Sb Stratigraphic and Structural Details Meldon Chert Formation Crackington Formation Sedimentary...fluorescence analysis of pyrrhotite and pyrite from north-west Dartmoor • • • 111 36 Summary A spectacular |  | | Journal (article/letter/editorial) | | Sukkula, Tammela, tapiolite, 477 British Isles ENGLAND Alderley Edge, Cheshire, osarizwaite, I75 Barrington...epidote, hornblende, diopsite, 427 Cheesewring quarry, Linkinhorne, danburite, 171; durangite, I72 Chycornish...Crowns Rock, St. Just, Land's End, garnet, 427 Dean quarry, The Lizard, djurle'ite, I72; analcime, adularia...garnet, axinite, epidote, apatite, hornblende, diopside, 427 South Terras mine, St. Stephen-in-Brannell...and M26 Devon Meldon quarry, Okehampton, greenovite, 172; priceite, 175 Ramsley mine, Okehampton, ilvaite |  | | 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 |  | | 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 |  | | Catalog/List | | CATALOGUE Byways, 20 Burstead Close, Cobham, Surrey, England KTll 2NL Phone 01932 862340 EMAIL . richard.tayler@minerals...River Quebec, Can 12 ALUMINITE Newhaven Sussex, England Rich fibrous pale grey-brown mass. Pure hard white...ALLOPHANE Hawkswood Mine, Cornwall 933 ANATASE Hingston Quarry,Cornwall Black micro crystals in crystalline feldspar...501 ALLOPHANE New East Wheal Russell mine, Devon ,England grey bleby small botryoidal with possible Brochantite...½" £2 lxl £4 lx2 £6 23 ANHYDRITE Staffordshire England Rich white to faintly blue masses CaS0.'4 lx2 £1 |  | | Journal (issue) | | ... 219 SYMPOSIUM. The structure of South West England A general view of the structure of Cornubia... north-west of Dartmoor. By E. B. Selwood. ... ... ... ... 237 The Structures of Mid-Devon and North...of North Devon. By S. Simpson. 249 Form and structure of the granites of South West England. By M. Stone... ... En-echelon veins in folds near Hartland, Devon (Abstract). By P. L. Hancock. ... ... ... 264 Early...Hobson. ... 264 Deformation analysis on the North Devon coast (Abstract). By K. Jeffery. ... ... ... 265 |  | | Catalog/List | | C267 BUSTAMITE excellent rich brown near Okehampton Devon) This is lxl 6Op lx2 fl.2O C268 CHALCOSTIBITE...(Ramsley Mine lxl fl.5O lx2 f3 of glassy micros Devon) 2x2 f6 C27O CHALCOPYRITE good crystals Also Quartz...mineral has only been found in The Mendips. (Merehead Quarry Mendips Somerset) f3.50 C273 COLORADOITE Mine...metallic Colorado U.S.A) lx single each 2 9 (Meldon B.R.Quarry some years ago. 2x4 f5 on matrix. ...areas in matrix XRD) A W matrix (Bessie Tyube Quarry on Basalt.(Island "B" - C278 GOETHITE really |  | | Journal (issue) | | conditions had improved the ground for walking on the quarry floors. There was a half-day excursion to the St...petrochemistry of kaolinite formation in Gwavas quarry, Newlyn, Cornwall.” 75. *Mr. G. M. Power : “The...analysis of small quantities of tourmaline from S.W. England ; a preliminary report.” 76. *Dr. C. S. Exley :...South Devon.” 98. *Dr. W. R. Dearman : “Bismuth and Molybdenite from Meldon Quarry, near Okehampton, Devon...geology of Devon and Cornwall”. Dr. W. R. Dearman “Map showing geological research in S.W. England - 1965” |  | | 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...rich white masses intergrown with Weymouth,Dorset,England JxJ 60p lx2 2x2 2x3 £4 46 BASALUMINITE AISO/4 OH |  | | Journal (article/letter/editorial) | | niobium-tantalum and other rare-element minerals in the Meldon aplite, Devonshire OLEG VON KNORRING AND ERIC CONDLIFFE...ABSTRACT.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...km long emplaced in the metamorphic aureole north-west of the main Dartmoor granite (Worth, 1920). This...1973, 1976) have given admirable accounts of the Meldon axinite, topaz, Li-A1 micas and lithian tourmaline |  | | Report (edition) | | GEOLOGICAL SCIENCES British Regional Geology South-West England (TH [RD EDITION) By E. A. Edmonds, M.Sc. M...world war, interest in the geology of south-west England has further inten ified. Much valuable work...done, and in 1962 the newly l"ormcd outh-we t England field unit of the Geological Survey began ix-inch...Mr. G. Bisson (District Geologi t. South-We t England, editor). Private workers whose publications have...the countryside and natural history of south-west England. An EXHIBIT illustrating the geology and scenery |
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