 | | Journal (article/letter/editorial) | | No. 106. September, 1924. Vol. XX. Topaz from Cornwall, with an account of its localities. By Arthur...hitherto been looked upon as comparatively rare in Cornwall. When massive, or even in the form of small, well-developed...cursorily to be mistaken for quartz. The presence of topaz as a microscopic accessory in granite, greisen,...considerable mass, thus affording evidence that topaz is in Cornwall, as in the case of other countries, a comparatively...forms, seventeen in number, observed on Cornish topaz, the lettering and the indices being those adopted |  | | Journal (article/letter/editorial) | | MAGAZINE, JUNE I 9 7 0 , VOL. 3 7 , NO. 2 9 0 Topaz from the Meldon aplite, Devonshire M. NAWAZ CHAUDHRY...THE Meldon aplite, near Okehampton, Devonshire, England, is a sodium- and lithium-rich aplite dyke about...essential minerals, the aplite also contains accessory topaz, elbaite, apatite, and petalite. The main aplite...Some of these veins contain important amounts of topaz whereas others contain elbaite. Chemistry. The...samples M5, OP, and M K C were obtained from the topaz-bearing pegmatitic veinlets, and the samples MOt |  | | Journal (article/letter/editorial) | | experimental studies in determining the origin of topaz-quartztourmaline rock and tourmaline-quartz rock...tourmaline-quartz rock. Proc. Ussher Soc., 5, 121-127. Topaz-quartz-tourmaline rock and tourmaline--quartz rock...association with granitic rocks in south-west England and elsewhere. A brief review is given of available...from Cornwall (Roche Rock, Porth Ledden Beach and St Mewan Beacon) and Malaysia, and also for topaz-quartz... The melting experiments indicate that neither topaz-quartz-tourmaline rock nor tourmaline-quartz rock |  | | Journal (article/letter/editorial) | | a few other localities. Arthur Russell: Topaz from Cornwall, with an account of the localities, old and...All the hitherto recorded occurrences of topaz in Cornwall are described, as also new ones at Castle-an-Dinas...Castle-an-Dinas Wolfram Mine, St. Columb Major; Belowda Beacon Mine, Roche; Beam Mine, St. Austell; and Mulberry...localities topaz is present in considerable quantities in the cassiterite-wolfram lodes ; at Belowda it is...Ilmenite, Quartz, Tourmaline, Barytes, Brookite, Topaz, Biotite, Epidote, Monazite, Muscovite, Orthoclase |  | | Journal (article/letter/editorial) | | fFHERE are two hills named Castle-an-Dinas in West Cornwall, •*- one near Penzance and the one on which the...wollastonite. 1 " The Geology of Castle-an-Dinas and Belowda Beacon " : Proc. R.G.S, Corn., vol. xix. S. H. ...coarsely crystalline granite such as occurs on Belowda Beacon to the east. The granite outcrop and that exposed...seem to be in the jiature of apophyses of the Belowda mass to the east. On the south of the hill a quartz-porphyry...contains lithia and is very strongly birefringent, and topaz, with grains and needles of tourmaline. In the lower |  | | Journal (article/letter/editorial) | | INrnooucrroN Variations in the optical properties of topaz due to substitution of OH- for F- have beenknown...Howie and Zussmat (1962), Although the structure of topaz is well known (Alston and West, 1928; Pauling, 1928)...systematic variations in the unit cell dimensions ol topaz have not been reported to date. The present investigation...concernsvariations in the unit-cell dimensions oI topaz and their relation to the extent of substitution...NaCl as an internal standard. 2d values for the topaz (320), (031), (2Il), Qzq and (021) X-ray reflections |  | | Journal (article/letter/editorial) | | in topaz for greisenisation and mineralisation in the Hensbarrow topaz granite, Cornwall, England Received:...inclusions in topaz from greisens in the Hensbarrow topaz granite stock (St. Austell, Cornwall) are used...for late stage greisening and mineralisation. The topaz contains an abundant and varied suite of inclusions...Mn+2)2(Nb,Ta)2W+6O10]. Primary L + V inclusions in topaz show relatively high Th (mainly 300 to >500 °C)...0–50 wt % NaCl equivalent). Textures indicate that topaz formed earlier than quartz and the fluid inclusion |  | | Journal (article/letter/editorial) | | of the five large granite masses of the West of England, is, nevertheless, perhaps the most interesting...Castle-an-Dinas and Belowda Beacon, together with the closely adjacent patches of St. Dennis and Roche. The area...district in Cornwall, rising to a height of 1,000 ft. above sea-level in Hensbarrow Beacon, an elevation...excursion to Cornwall in 1887, when visits were paid to Carclaze and other clay works, and to Roche Rock. '*'...particular interest, present in the normal granite, are topaz, andalusite, and cordierite, all of which are commonly |  | | Catalog/List | | WICK CARRUTH Copse Cottage Drakewalls Gunnislake Cornwall PL18 9EG Tel/Fax: Tavistock (01822) 832530 *...MAY/JUNE 1907 *1. AGARDITE. Wheal Carpenter, Hayle, Cornwall. Iron stained quartz matrix showing micro green...30x20x10mm. £6. 6. BORNITE. Carn Brea Mine, Illogan, Cornwall. A dark chalcocite/chalcopyrite matrix with hundreds...£45. 8. BOURNONITE. Herodsfoot Mine, Lanreath, Cornwall. A fine small museum, specimen ex. Chicago Natural...CALCITE .AND DOLOMITE. Greystones Quarry, Lezant, Cornwall. A 90x50mm area of dolerite matrix showing creamy |  | | Report (issue) | | Southwest England 10 Fig 5 Extent of kaolinisation in the granites of Southwest England 11 Fig 6...the United Kingdom and the deposits of Southwest England are world famous for their high quality. The United...range of other uses. The deposits of Southwest England were formed by the in situ alteration of the feldspar...Plymouth chemist, recognised their occurrence in Cornwall, firstly in the Tregonning-Godolphin Granite in...proportion to today. The china clays of Southwest England are world famous both for their high quality and |  | | Report (issue) | | MEMO.IRS OF THE GE()LOG-ICAL SURVEY ENGLAND AND WALES. EXPLANATION OF SHEET 347. THE GEOLOGY OF THE...and Museum of Practical Geology. •· LIST 6f CORNWALL. 32. NE., by C. Reid ; 32 SE., by C. Reid, G...United Mines 143 •• • • •• • ••• ••• ,, 17. Duke of Cornwall Mine ••• 143 • •• ••• ••• ••• ••• ••• ,, 18. East...describe the geology of about 200 square miles in Cornwall, including the ,vhole of St. Austell Moor, and...largest nuggets found in alluvial deposits in Cornwall were obtained from stream w,orks in the valleys |  | | Journal (article/letter/editorial) | | Castle-an-l)inas wolfram mine, St. Columb Major, Cornwall, as pale yellow fragments. It is tetragonal, space-group...Castle-an-Dinas wolfram mine, St. Colmnb Major, Cornwall (sixinch ordnance map, 33 SW.) my attention was...occurring in that most wonderful store-house--Cornwall. The cream-eoloured to greenish pellets of russellite...mass: native bismuth, wolframite, limonite, quartz, topaz, lithia-mica, and black prisms of tourmaline. The...geology of Castle-an-Dinas and Belowda Beacon. Trans. Roy. Geol. Soc, Cornwall, 1919, vol. 15, pp. 269-285 |  | | Journal (article/letter/editorial) | | Manchester, Manchester, Great Britain Damage of Topaz and Other Minerals in the Electron Microscope M...of his 60th birthday. Summary Hydroxyl bearing topaz suffers beam-damage in the electron microscope....damage ceases after a short period of time, and the topaz electron diffraction pattern remains apparently...unchanged. In a few cases complete breakdown of the topaz occurs to produce mullite and/or fine-grained 7-alumina...ionisation effects. The strain fields found in topaz were also produced in samples of humite and apatite |  | | Report (issue) | | and tin-bearing vein from Hemerdon deposit, Devon, UK. The tungsten is present in wolframite, the dark...the Czech Republic through France and south-west England and into Spain and Portugal also has some important...typified by the Cornubian orefield in south-west England (see section on Britain). Tin, copper, lead-zinc...rocks are typically composed mainly of quartz, topaz and white mica, accompanied by tourmaline, fluorite...develop in aluminosilicates. Abundant veins of quartz-topaz are characteristic of intensely greisenised zones |  | | Book | | Endsleigh House 50 Daniell Road Truro, Cornwall TR1 2DA England Printed in Great Britain by Short Run...that he knew of no place on earth that surpassed Cornwall in the number and variety of its minerals. Hogg's...is subtitled 'in wich [sic] is shown how much Cornwall contributes to the illustration of the science'...later by Collins' A Handbook to the Mineralogy of Cornwall and Devon' (1871; 1892 with addenda, the latter...mention Purser's 'Minerals and locations in S.W. England' (1974). The work was never published, although |  | | Report (issue) | | 3LA No.83 Mineral investigations near Bodmin, Cornwall. Part 5-The Castle-an-Dinas wolfram lode BRITISH...·1 I I I I Mineral investigations near Bodmin, Cornwall. Part 5-The Castle-an Dinas wolfram lode K....geochemical maps of p arts of south Devon and Cornwall 45 Mineral investig ations near Bodmin, Co·nwall...Wheal Reeth, Godolphin, Cornwall 82 Mineral investig ations near Bodmin, Cornwall. Part 4-Drilling at Royalton...Northumberland 48 Mineral investig ations near Bodmin, Cornwall. Part 3-The Mulberry and Wheal Prosper area 49 |  | | Book | | There have been !)lines in Cornwall for some 3500 years where the intrusion of huge masses of granitic...significant minerals to come out of southwest England. The accompanying captions describe the crystallographic...t). ~ e • ~t~' l lr\ V: 1 'I Minerals of Cornwall and Devon Joseon1ne Community Llbral1es Grants...Embrey. P. G. Minerals of Cornwall and Devon. 1. Mines and mineral resources;--England --Devon 2. Mines and...and n1ineral resources --England--1Cornwall J. Title IL Symes. R. F. 549.9423'5 QE262.D45 ISBN 0-56 5-009 |  | Smith, W.D., Darling, J.R., Bullen, D.S., Lasalle, S., Pereira, I., Moreira, H., Allen, C.J., Tapster, S. (2019) Zircon perspectives on the age and origin of evolved S-type granites from the Cornubian Batholith, Southwest England. Lithos, 336. 14-26 doi:10.1016/j.lithos.2019.03.025 | Journal (article/letter/editorial) | | granites from the Cornubian Batholith, Southwest England W.D. Smith, J.R. Darling, D.S. Bullen, S. Lasalle...granites from the Cornubian Batholith, Southwest England, LITHOS, https://doi.org/10.1016/j.lithos.2019...granites from the Cornubian Batholith, southwest England W.D. Smith1,2,* smithwd1@cardiff.ac.uk, J.R. Darling2...MANUSCRIPT Abstract Granite stocks across southwest England have played a significant role in the genesis of...mineralisation. 2. Regional Setting MA Southwest England is primarily composed of Devonian and Carboniferous |  | | Report (edition) | | AND MUSEUM BRITISH REGIONAL GEOLOGY SOUTH-WEST ENGLAND (SECOND EDITION) by HENRY DEWEY LONDON HER ...SURVEY AND REGIONAL MUSEUM GEOLOGY SOUTH-WEST ENGLAND (SECOND EDITION) by HENRY DEWEY YRIGHT RESERVED...DEVONIAN ROCKS -----(1) Lower Devonian -----(a) Cornwall and South Devon (b) North Devon ------ - 17...17 17 17 19 (2) Middle Devonian -----(a) Cornwall and South Devon _ _ _ lb) North Devon ------- - 22...22 22 22 (3) Upper Devonian -----(a) Cornwall and South Devon lb) North Devon ------(c) Pillow lavas |  | | Book | | Igneous Rocks of South-West England THE GEOLOGICAL CONSERVATION REVIEW SERIES The comparatively small...M. C. Gyopari S. Igneous Rocks of South-West England P. A. Floyd, C. S. Exley and M. T. Styles 6. ...D. R. Bridgland Igneous Rocks of South-West England P. A. Floyd Department of Geology, University of...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 |  | | Book | | GEOLOGY OF ,,, ,,. F .. THE GEOLOGY OF CORNWALL Cornwall is renowned for its spectacular rocky coastline...seventeenth century. This book reviews the importance of Cornwall in the development of geological thought in Britain...of notable scientific interest. The Geology of· Cornwall is a companion volume to The Geology of Devon...org/details/geologyofcornwal0000unse THE GEOLOGY OF CORNWALL AND THE ISLES OF SCILLY Edited by E.B. Selwood...Liskeard High: E.B. Se/wood The Structure of East Cornwall: K. P Isaac Culn1 Basin: JR. Andrews The Boscastle-Tintagel- |  | | 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...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 |  | | Catalog/List | | I Byways, 20 Burstead Close, Cobham, Surrey, England KTll 2NL Phone 01932 862340 EMAIL richard.tayler@minerals...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 ________...Fe As S 531 ARSENOPYRITE Hingston Down Quarry,Cornwall,Englnnd Rich silvery masses with Chaleopyrite |  | | Book | | Twelveheads Press PO Box 59, Chacewater Truro, Cornwall TR4 8Z}. especially true of its minerals, some...rocks lie at the bottom of a sequence, but in Cornwall this becomes far from simple where rocks have...of the county’s inland and coastal FRONT cover: Roche Rock landscapes. Mention is also made of economic...(metamorphism) of existing rocks. The land wl ‘ch is now Cornwall has seen periods of uplift and sinking beneath...conditions changed too, for the land that is now Cornwall was once close to the Equator before the action |  | | Journal (article/letter/editorial) | | Indium mineralisation in SW England: Host parageneses and mineralogical relations Jens... Shail, Robin K., Indium mineralisation in SW England: Host parageneses and mineralogical relations,...Ore Geology Reviews Indium mineralisation in SW England: host parageneses AC CE P TE D and mineralogical...Cornubian batholith, SW England 1 ACCEPTED MANUSCRIPT ABSTRACT The SW England ore region contains significant...Interestingly, we have no reason to believe that SW England is different to other regions with granite-related |
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