 | | Journal (article/letter/editorial) | | Geological Exploration in the St. Agnes Area, Cornwall by R. H. T. GARNETT Received 6 January 1961; read...sea-bed between St. Agnes Head and Cligga Head on the north coast of Cornwall was geologically explored...tin-copper mineralisation which is associated with the Cligga and St. Agnes Granites and has been extensively...results: between St. Agnes Head and Perranporth on the north coast of Cornwall. The amount of planning prior...which the diving operations were conducted. Cligga Head forms the eastern limit to the area, the western |  | | 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 |  | | Journal (article/letter/editorial) | | associated with the Cornubian Batholith of southwest England: Direct dating of cassiterite by in situ LA-ICPMS...Abstract The Cornwall and Devon vein- and greisen-type copper and tin deposits of southwest England are spatially...Keywords Cornwall . Devon . Cornubian . Cassiterite . Tin . U–Pb . Geochronology . LA-ICPMS . England Introduction...tin and copper deposits of Cornwall and Devon, in the southwest of England, have been a valuable commodity...2016). The aforementioned geochronology studies in Cornwall and Devon focused on dating the granitic host |  | | Book | | Designed by BDP - Book D evelo ion,/ enzance, Cornwall o part of this 'Nork may be pho ocop:ed, stored...Linkinhorne East Cornwall : Callington t o Calstock 36 40 45 50 56 61 66 70 74 Rocks of Cornwall 78 Precious...physical properties of minerals (pages I I 0- 1 I). Cornwall, for its size, has one of the most diverse ranges...1n museum collections such as hose of the Royal Cornwall Museum in Truro and the aural His ory Museum ...spectacular examples of this are exposed in North Cornwall. It was during this period of mountainbuilding |  | | Journal (article/letter/editorial) | | mineralised granite aureoles Geoscience in south-west England, 10, 042-049 The REE distribution patterns in...widespread C- type granites (Castle an Dinas, Cligga Head and St Agnes) are more evolved, have characteristically...petrography of samples from the Castle-an-Dinas, Cligga Head and St Agnes aureoles indicate rocks in which...affected by lithological inhomogeneity, as at Cligga Head, where there are sandstones and chert rich pelites...from a buried cusp or ridge. Samples from west Cornwall (Gwithian, Chacewater and Truro) relate to both |  | | 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- |  | | Report (chapter) | | Geological Sciences, University of Durham, Durham DH1 3LE, UK (e-mail." k.j.w.mccaffrey@durham.ac.uk) 2CEESR, School...Kingston upon Thames, Surrey KT1 2EE, UK 3present address. Shell UK Exploration and Production, 1 Altens...Altens Farm Road, Nigg, Aberdeen AB9 2H7, UK Abstract: Fractures are ubiquitous in crystalline rocks and control...fractures in the St A ustell, Bodmin and Cligga Head granites, Cornwall The Cornubian batholith was intruded...during the latest Variscan orogenic events in SW England (Willis-Richard & Jackson 1989). The batholith |  | | Journal (article/letter/editorial) | | zircon wolframite biotite apatite molybdenite sericite calcite monazite garnet zeolites a.o. xenotime...biotite zinnwoldite prototithionite muscovite sericite micas Fig. 1. Classification of greisens based...phlogopite. In addition to them quartz, chlorite, sericite, pyrite, talc and carbonates may be formed. EVART(1962)...characterizing the changes in greisenization at Cligga Head in Cornwall (CHAROY1979). In interpreting these changes...(1979) CHEMICAL CHANGES IN GREISENIZATION AT CLIGGA HEAD P h y s i c o - c h e m i c a l nature of fluids |  | | 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 |  | | Journal (article/letter/editorial) | | Compositional relations in Li-micas from S.W. England and France: an ion- and electronmicroprobe study...been used to analyse Li-rich micas from the S.W. England batholith (mainly the St Austell granite) and the...Li-micas, ion-microprobe, electron-microprobe, S.W. England, France. Introduction (K2(A12Li4)[Sis]O20(OH,F)4);...trioctahedral micas from the Cornubian batholith, S.W. England. They confirmed the continuous solid-solution series...analyse Li-micas in Hercynian granites from S.W. England and the Massif Central, France 9 Micas from rocks |  | Jackson, Norman J., Willis-Richards, Jonathan, Manning, David A. C., Sams, Mark S. (1989) Evolution of the Cornubian ore field, Southwest England; Part II, Mineral deposits and ore-forming processes. Economic Geology, 84 (5) 1101-1133 doi:10.2113/gsecongeo.84.5.1101 | Journal (article/letter/editorial) | | GeothermalEnergyProject,CamborneSchoolof Mines,PenrynTR109DU, Cornwall,Ur•itedKingdom DAVID A. C. MANNING, Departmentof...alongthe southern steeply dipping contactat Cligga Head (quartz-Li galena(Hosking, 1964;Jackson, 1977)...range 4 to 6/m. Aggregatevein contains abundant sericite and tourmaline crystals width• are in the rangeI...not uncommon. Gray-colored the vein swarm at Cligga Head, where shallow-dip- greisenbandsare of positiveindurationand...porphyrysystemin the ore field. It forms of quartz, muscovite,sericite, Li mica, tourmaline, a steeplydippingtabularintrusionsome650 |  | | Journal (article/letter/editorial) | | the Variscan granites and related rocks of west Cornwall. Together with electron microprobe data these...geochemistry The high-level, late Variscan granites of SW England are derived from highly differentiated melts rich...o w Conce M o o r Priests Cove Cligga H e a d Crowns, Botallack Cligga H e a d Main Pit, G o o n b a r...Austell St. Austell Land's End Cligga H e a d Land's End Cligga Head St. Austell St. Austell St. Austell...(fine-grained biotite granite, Hingston Down, east Cornwall), 1160 ppm (finegrained granite with tourmaline | | | Book | | OF CORNWALL Edited by E.B. SELWOOD, E.M. DURRANCE and C.M. BRISTOW THE GEOLOGY OF CORNWALL Cornwall...seventeenth century. This book reviews the importance of Cornwall in the development of geological thought in Britain...rock and mineral exploitation. The Geology of Cornwall will be of interest to all those, whether amateur...of notable scientific interest. The Geology of Cornwall is a companion volume to The Geology of Devon...Press Reed Hall. Streatham Drive Exe1er. EX4 4QR UK Ii:) I998 University of Exeter Hardback ISBN O 85989 |  | Clark, A.H., Chen, Y., Farrar, E., Wasteneys, H.A.H.P., Stimac, J.A., Hodgson, M.J., Willis-Richards, J., Bromley, A.V. (1993) The Cornubian Sn-Cu (-As, W) Metallogenetic Province: product of a 30 m.y. history of discrete and concomitant anatectic, intrusive and hydrothermal events. Proceedings of the Ussher Society, 8 (2) Ussher Society. | Journal (article/letter/editorial) | | South Crofty Mine, Dudnance Lane, Pool, Redruth, Cornwall TR15 3RS. J. Willis-Richards, Camborne School...Rosemenowas, Penryn, Cornwall TR10 9DU. A. V. Bromley, Petrolab, Wilson Way, Pool, Redruth, Cornwall, TR15 3RS....the major plutons are: Isles of Scilly (Peninnis Head), 290.3 ± 1.2 Ma; Land's End (Lamorna), 274.5 ±...1.0 Ma; Cameron Quarry (St. Agnes), 278 Ma; Cligga Head, 279.9 ± 0.8 Ma; Castle-an-Dinas (East), 273...swarms, commonly comprising sheeted series (e.g., Cligga Head) or stockworks (Hemerdon) and generally enriched |  | Grancea, Luminita, Bailly, Laurent, Leroy, Jacques, Banks, David, Marcoux, Eric, Milési, Jean, Cuney, Michel, André, Anne, Istvan, Dumitru, Fabre, Cécile (2002) Fluid evolution in the Baia Mare epithermal gold/polymetallic district, Inner Carpathians, Romania. Mineralium Deposita, 37 (6) 630-647 doi:10.1007/s00126-002-0276-5 | Journal (article/letter/editorial) | | features typical of low-sulfidation (or adularia-sericite) epithermal deposits. The combination of fluid-inclusion...School of Earth Sciences, Leeds University, LS29JT, UK E. Marcoux ISTO, Université d’Orléans, ESEM, 45072...features typical of low sulfidation- or adularia sericite-type epithermal systems (Heald et al. 1987; White...andesine, chlorite, epidote and minor calcite, sericite, actinolite and clay minerals (Russo 1971; Stanciu...also characterized by the dominance of adularia-sericite alteration bordering silicified zones near the |  | | Journal (article/letter/editorial) | | Mineralisation at the Carrock Fell Tungsten Mine, N. England: Paragenetic, fluid inclusion and geochemical study...Kingdom outside the Hercynian province of South-west England, produces wolframite and scheelite from parallel...includes both coarse muscovite and fine decussate "sericite". Field 1 shows rocks still containing plagioclase...usefully compared with tin-tungsten lodes in SW England, where many of the economic Sn-W lodes occur in...in the majority of the polymetallic lodes in SW England mineralisation is concentrated about the granite |  | | Journal (issue) | | age of some cassiterite mineralisation in S. W. Cornwall (Abstract). By A.N. Halliday....................technique to selected mineralised areas in S.W. England (Abstract). By K. Atkinson and M.J. McCullough...of topaz-rich greisens in St.Michael's Mount, Cornwall. By Farid Moore.................................calc-silicate rocks from Duchy Peru borehole, near Perranporth, Cornwall. By A.J.J. Goode and R.J. Merriman........ Upper Devonian purple and green slates in North Cornwall (Abstract). By A.P. Beese.................... |  | | Journal (article/letter/editorial) | | Genesis of the Cornubian Batholith (South-West England): the example of the Carnmenellis Pluton byB. CHAROY...of the well-known mining history of South-West England and the clear relationship between economic mineralization...the Cammenellis pluton in South-West England. C1H: Cligga Head; SMM: St Michael Mount; LC: Lamorna Cove...the biotite-muscovite granites from South-West England (data from Exley & Stone, 1966). Downloaded from...Land's End pluton (Lamorna Cove, St Ives, Cape Cornwall) were also collected but, because of weathering |  | | Journal (article/letter/editorial) | | in Rb caused by the formation of K-feldspar and sericite. The distribution of the Rb/Sr ratio in the greisen...of fractionation. Hercynian granitic rocks of Cornwall are mineralized in Sn and Cu and are high in Li...1957). Greisen associated with the Cligga Head Granite of Cornwall has a Ba/Rb ratio of 0.09, while the...biotite and the formation of K mica, K-feldspar, sericite and clay minerals in the various alteration types... A.: Greisenization in the Granites of Cligga Head, Cornwall. Proc. Geol. Ass. 82 (Part 2): 209-230 (1971) |  | | Report (edition) | | British Regional Geology I * South-West England r * FOURTH EDITION e ■ - O ” ..y 1835 Geological...Mr. G. Bisson (District Geologist, South-West England), as well as Professor W. R. Dearman and the con...volume [1966] of the Royal Geo logical Society of Cornwall. The succeeding years have seen notable advances...in our knowledge of the geology of south-west England. Most of the great expanse of Carboniferous rocks...Isotopic age-determinations of rocks of south-west England ...... Facing 112 1. . . . List of Geological |  | | 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... Propylitic alteration25, mainly chlorite and sericite, may form an outer halo beyond the mineralised...Erzgebirge (Czech Rep.), Hemerdon (south-west England) Wolfram camp (Queensland, Australia), Doi Ngom |  | Ni, Pei, Li, Wen-Sheng, Pan, Jun-Yi, Cui, Jian-Ming, Zhang, Kai-Han, Gao, Yan (2022) Fluid Processes of Wolframite-Quartz Vein Systems: Progresses and Challenges. Minerals, 12 (2) 237 doi:10.3390/min12020237 | Journal (article/letter/editorial) | | metapelitic rocks Porphyritic microgranite [11] sericite schist Porphyritic biotite granite [76] W-Sn...world-class districts for tungsten deposits in Cornwall, the Iberian Massif, the Bohemian Massif, the...3.4 to 320.1 ± 2.8 Ma [96]. The Cornwall region, located in SW England, includes ophiolitic rocks of the...the region, including the Cligga Head mine founded within the Cligga Head granite and Marazion Beach...ca. 295 to 274 Ma for Sn-W deposits in the SW England [100]. The French Massif Central hosts several | | | Report (edition) | | G .. Bisson (District Geologist, South--West England), as well as Professor W. R. Dearman and the con...volume [1966] of the Royal Geo logical Society of Cornwall. The succeedi11g years have seen notable advances...in our knowledge of the geology of south-west England. Most of the great expanse of Carbonif�rous rocks...age-determinations of rocks of south-west . . . . . . . Facing England 1 112 List of Geological Survey Maps and Memoirs...positions prior to continental drift. South-west England is shown in . . . . . black . . . . . Generalized |  | | Journal (article/letter/editorial) | | breakdown of alkali feldspar to give topaz and sericite. This process of microclinization or K-silicate...metasomatism include breakdown of alkali feldspars to sericite and topaz, destruction of albite to form fluorite...= KA12(Si3Oao)(OH)2 + 10 SiO 2 + AIEB%(Si6018) sericite quartz beryl (1) +A12SizO(OH), + 6K + (7) kaolinite...orthoclase feldspars are also attacked producing sericite, kaolinite and quartz as follows: Na2CaA14Si8024...6 SiO: + 2 K + (2) sericite Further attack in the acqueous phase of the sericite produces kaolinite thus: |  | | Report (issue) | | world, especially the Hemerdon deposit in Devon, England. It is also analogous to Climax-type molybdenum...may also contain pyrrhotite, pyrite, chlorite, sericite, and a carbonate. It is probable that much of...irregularly-bounded metamorphic vein is composed of quartz, sericite, and pyrite. The Stage 1 vein is composed of quartz...minerals include quartz, muscovite, manganosiderite, sericite, chlorite, clay, and iron oxide. These veins typically...with some replacement of microcline and albite by sericite and a carbonate (probably manganosiderite). The |
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