 | Drivenes, Kristian, Larsen, Rune B., Müller, Axel, Sørensen, Bjørn E., Wiedenbeck, Michael, Raanes, Morten P. (2015) Late-magmatic immiscibility during batholith formation: assessment of B isotopes and trace elements in tourmaline from the Land’s End granite, SW England. Contributions to Mineralogy and Petrology, 169 (6) doi:10.1007/s00410-015-1151-6 | Journal (article/letter/editorial) | | ORIGINAL PAPER Late‑magmatic immiscibility during batholith formation: assessment of B isotopes and trace...in tourmaline from the Land’s End granite, SW England Kristian Drivenes1 · Rune B. Larsen1 · Axel Müller2...the roof segment of the Land’s End granite, SW England. This study shows that the orbicules formed from...Natural History Museum, Cromwell Road, London SW7 5 BD, UK 4 Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum...Orbicules · Boron isotopes · Trace elements · Batholith Introduction Tourmaline is a ubiquitous accessory |  | Duchoslav, M., Marks, M.A.W., Drost, K., McCammon, C., Marschall, H.R., Wenzel, T., Markl, G. (2017) Changes in tourmaline composition during magmatic and hydrothermal processes leading to tin-ore deposition: The Cornubian Batholith, SW England. Ore Geology Reviews, 83. 215-234 doi:10.1016/j.oregeorev.2016.11.012 | Journal (article/letter/editorial) | | leading to tin-ore deposition: The Cornubian Batholith, SW England M. Duchoslav, M.A.W. Marks, K. Drost...leading to tin-ore deposition: The Cornubian Batholith, SW England, Ore Geology Reviews (2016), doi: http://dx...leading to tin-ore 2 deposition: The Cornubian Batholith, SW England 3 4 M. Duchoslava,*, M.A.W. Marksa...to 16 hydrothermal stages of the Cornubian Batholith (SW England). Tourmaline composition found in ...18 species with the general endmembers schorl, dravite, elbaite, uvite, feruvite, foitite and Mg-foitite |  | | Journal (article/letter/editorial) | | Geoscience in south-west England MONAZITE IN POLYMETALLIC CHLORITE-(TOURMALINE)-QUARTZ-(FLUORITE)CASSITERITE-SULPHIDE...mineralisation in Cornwall. Geoscience in south-west England, 10, 403-409. Monazite [(Ce, La, Th, Nd, Y) PO4]...the chronology of granite magmatism across SW England using U-Pb monazite and xenotime methods have not...U-Pb dating of such mineralisation across the Cornubian Orefield. Where paragenetic relationships can...(after biotite), muscovite, orthoclase and brown (dravite-rich) tourmaline; elsewhere isolated chloritised |  | LeBoutillier, N.G., Camm, G.S., Shail, R.K., Bromley, A.V., Jewson, C., Hoppe, N. (2002) Tourmaline-quartz-cassiterite mineralization of the Land’s End Granite at Nanjizal, west Cornwall. Geoscience in South-West England, 10 (3) Ussher Society. | Journal (article/letter/editorial) | | Geoscience in south-west England TOURMALINE-QUARTZ-CASSITERITE MINERALIZATION GRANITE AT NANJIZAL, WEST...Nanjizal, west Cornwall. Geoscience in south-west England, 10, 312-318. Nanjizal is one of the few locations...veins is dominated by the Mg-rich end-member, dravite. The subsequent two generations of tourmaline are...mineralisation is relatively uncommon in S.W. England but there are remarkable similarities between the...similar styles of tin mineralization elsewhere in SW England. PREVIOUS WORK The only known primary reference |  | | Journal (article/letter/editorial) | | University of Leicester, Leicester LEI 7RH, England (UK) 2Isotope GeosciencesUnit, S. U. R. R. C., East...East Kilbride, Glasgow G75 0QF, Scotland (UK) Received: 19 May 1995/Accepted: 3 January 1996 Abstract...Mingora area (Fig. 2) where fuchsite and Cr-rich dravite also accompany the emerald mineralization. However...fuchsite (with 5 to 7 wt.% Cr203) and Cr-, Mgrich dravite (FeO/FeO + MgO ~<0.1 with Cr203 ranging up to ~...tourmalines of the present investigation are Mg-rich dravite (with FeO/FeO + MgO ~<0.1) similar to those studied |  | Harlaux, Matthieu, Mercadier, Julien, Marignac, Christian, Villeneuve, Johan, Mouthier, Bernard, Cuney, Michel (2019) Origin of the atypical Puy-les-Vignes W breccia pipe (Massif Central, France) constrained by trace element and boron isotopic composition of tourmaline. Ore Geology Reviews, 114. 103132 doi:10.1016/j.oregeorev.2019.103132 | Journal (article/letter/editorial) | | different generations of hydrothermal tourmaline have dravite-schorl compositions and show similar major and...proposed for the Sn deposits of the Cornubian Batholith (England) using the same approach (Williamson...the boron budget in the Sn deposits of the Cornubian Batholith cannot be derived from the granitic melts...using the Excel spreadsheet from The Open University, UK (Tindle et al., 2002) normalizing to 31 anions and...tourmaline reference materials corresponding to dravite (Harvard #108796) and schorl (Harvard #112566) |  | | Journal (article/letter/editorial) | | those from the 76 kaolin industry in Cornwall, UK, have proven to be a potential source for REE, Sn... 113 114 2. GEOLOGICAL BACKGROUND 115 The Cornubian granite province is well-known for its historically...as a major kaolin producer. 117 118 2.1. The Cornubian Sn-W province 119 Tin is distributed on the...tin belt passes from the Cornubian massif (Redruth, Camborne, etc.) 123 in UK through the French Massif...(Jébrak and Marcoux, 2008). 128 The batholith of SW England was formed during the late Variscan orogeny |  | Müller, Axel, Seltmann, Reimar, Halls, Christopher, Siebel, Wolfgang, Dulski, Peter, Jeffries, Teresa, Spratt, John, Kronz, Andreas (2006) The magmatic evolution of the Land's End pluton, Cornwall, and associated pre-enrichment of metals. Ore Geology Reviews, 28 (3) 329-367 doi:10.1016/j.oregeorev.2005.05.002 | Journal (article/letter/editorial) | | Department. Mineralogy, Cromwell Road, London SW7 5BD, UK b Eberhard Karls Universität Tübingen, Wilhelmstr...composite plutons forming the late-Variscan Cornubian batholith. The western part of the pluton hosts the...five main granite plutons which form the Cornubian batholith. These are the Dartmoor, Bodmin, St. Austell...the Land’s End pluton within the Cornubian batholith in SW England. Numbers in parentheses correspond...immediately surrounding the five granite plutons in SW England, began with the Variscan cycle of granite plutonism |  | | Journal (article/letter/editorial) | | tourmaline from quartz-tourmaline veins is Mg-rich dravite with a range of Fe/(Fe+Mg) ratio 0.23 to 0.45 and...quartz-tourmaline veins (Samples T11a to T11c) are dravite with lower Fe/ (Fe+Mg) and Na/(Na+Ca) ratios of...of 0.23–0.45 and 0.67–0.90, respectively. Small dravite veinlets (Samples T9d and T10d) are found crosscutting...that cut the orbicule-bearing granite are Mg-rich dravite, which are also enriched in Ca and Ti, and fall...quartz-tourmaline orbicules from the Seagull batholith, Yukon Territory, and the Lavicky leucogranite |  | | Journal (article/letter/editorial) | | therefore of significant interest. The Cornubian China clay deposits in the UK could prove a valuable resource...China clay deposits of SW England lay on the so-called Cornubian batholith which has a 200-km-long extension...bodies (Willis-Richards and Jackson, 1989). The batholith has been affected by several episodes of alteration...contrast microprobe analysis on samples from Cornubian granites by Alderton et al. (1980) show significant...samples used in this work were supplied by Imerys Ltd., UK. The samples were collected and aggregated from daily |  | | Journal (article/letter/editorial) | | quartz cores in tourmaline from Roche Rock, SW England A. MUÈLLER1,*,{, B. J. WILLIAMSON1 AND M. SMITH2...Natural History Museum, Cromwell Road, London SW7 5BD, UK School of the Environment, University of Brighton...Cockcroft Building, Lewes Road, Brighton BN2 4GJ, UK ABS TR AC T The nature and mode of origin of quartz-cored...massive quartz-tourmaline (MQT) rocks at Roche, SW England. The QCT are annular, have blue maximum absorption...quartz, tourmaline, hydrothermal, Roche Rock, England. Introduction THE phenomenon of quartz-cored |  | | Journal (article/letter/editorial) | | colors and compositions of tourmaline, ranging from dravite to schorl, are present in the deposit, but the...couleurs et compositions de tourmaline, variant de dravite à schorl, sont présentes dans ce gisement, mais...crystallization of the pluton. It is similar to blue dravite that 349 replaced cordierite in Li-poor granitic...five tourmaline standards (112566 schorl, 108796 dravite, 98144 elbaite, STRGR–2 schorl; Dyar et al. 1998...composition of most samples corresponds to that of the dravite–schorl solid-solution series, extending toward |  | | Journal (article/letter/editorial) | | the Cornub ian batholith in England (Exley & Stone 1966), the South Mountain batholith in Nova Scotia...the Himalayas (LeFort 1981), much of the Idaho batholith I The US Government has the right to retain a...muscovite from the Carnmenellis pluton of the Cornubian batholith are highly enriched in Cs, Rb, and Li, so...1985). The data show that for tourmaline in the dravite-schorlite series (ideal compositions H4NaMg3Al6B3Si6031...porphyritic granite of Dartmoor (part of the Cornubian batholith) as a negligible 179 ppm, but the mineral |  | | Journal (article/letter/editorial) | | B-rich monzogranite apophysis of the Larderello batholith cored from 3.5 km depth G. Cavarretta, Roma and...B-rich monzogranite apophysis of the Larderello batholith cored from 3.5 km depth. – N. Jb. Miner. Abh....rhyolites and granites of Alaska, Peru, South-West England, Portugal, Czech Republic, Mongolia and Himalaya...as a partially molten slowly cooling composite batholith rooted in the mantle (Gianelli et al. 1997, Mongelli...bodies, probably apophyses of the main Larderello batholith, were emplaced within a Paleozoic to Precambrian |  | | Journal (article/letter/editorial) | | University of MA Southampton, SO14 3ZH, Southampton, UK D *Corresponding authors, E-mail address: zhaokd@cug...tourmalines belong to the alkali group representing dravite-schorl solid solution series with the former three... types being schorl and the Tur-PL type being dravite. Petrography, chemical discrimination diagrams...replicate analyses of tourmaline reference materials dravite (HS#108796) and schorl NU (HS#112566) from the...previous work (Ribeiro da Costa et al., 2014). The dravite yields an average δ11B value of -6.4±0.4 ‰ (1SD |  | | Journal (article/letter/editorial) | | 284 0.169 0.010 0.050 0.046 5.772 Granite. Cornubian batholith [24] CRH3(1) -5.2 285 0.446 0.021 0.011 2...o f o n l y = 15%o between elbaite, schorl and dravite end members. 234 M. C H A U S S I D O N A N...for all the magmatic samples, were Schorl (Fe) Dravite (Mg) Fig. 2. Ternary plot showing the compositional...THE CONTINENTAL 235 CRUST (Li) (Mg) Elbaite Dravite not found. This difference is probably due to...( = 10%o change between elbaite and schorl or dravite) suggests that chemistry-dependent isotopic fractionation |  | | Journal (article/letter/editorial) | | obtained at the Southampton Oceanographic Centre (UK) by X-ray fluorescence; Fe-titration, for FeO and...used in the present study Location Pluton or Batholith Age Granite description References for granite/tourmaline...Leucogranites Portugal (CIZ) Spain (CIZ) SW England South Africa Rwanda USA (Maine) USA (South Dakota)...Austell and Land’s End granite plutons, in southwest England (London and Manning 1995; Smith and Yardley 1996;...with only a few analyses overlapping into the dravite field (Fig. 1a). This is confirmed on the ternary |  | | Journal (article/letter/editorial) | | the space defined by the exchange vectors from dravite: FeMg21 (schorl), MAlNa21Mg21 (foitite), AlOMg21...near the eastern margin of the Cabeza de Araya batholith * E-mail: npppepea@lg.ehu.es 0003–004X/99/0102–0055$05...(Fig. 4). A progressive increase in Al from the dravite end-member can be observed (Fig. 4b). Estimations...falling below the schorl-dravite join (Fig. 4). The variation from schorl-dravite to olenite-foitite is...and OH occupancies at the expense of the schorl/dravite end-member. X-site cation totals (Na1Ca1K) vary |  | Groat, L. A., Marshall, D. D., Giuliani, G., Murphy, D. C., Piercey, S. J., Jambor, J. L., Mortensen, J. K., Ercit, T. S., Gault, R. A., Mattey, D. P., Schwarz, D., Maluski, H., Wise, M. A., Wengzynowski, W., Eaton, D. W. (2002) MINERALOGICAL AND GEOCHEMICAL STUDY OF THE REGAL RIDGE EMERALD SHOWING, SOUTHEASTERN YUKON. The Canadian Mineralogist, 40 (5) 1313-1338 doi:10.2113/gscanmin.40.5.1313 | Journal (article/letter/editorial) | | Table 4. The tourmaline ranges in composition from dravite to uvite. Most of the tourmaline within the schist...but distal from the quartz veins, is schorl to dravite in composition (Figs. 9a, b). The fine-grained...veins are dominantly dravite, whereas the tourmaline inclusions in emerald are dravite to uvite in composition...H2O for the granite fall outside the boxes for Cornubian and normal magmatic H2O, indicating that the magmatic...granite-related mineralization described in the Cornubian magmatism (Alderton & Harmon 1331 1991) and |  | | Journal (article/letter/editorial) | | for Al in deprotonated tourmalines along the oxy-dravite to povondraite join (O–P trend) is generally consistent...group Schorl Fluor-schorl Oxy-schorl Dravite Fluor-dravite Oxy-dravite Elbaite Fluor-elbaite Povondraite...Deprotonated tourmaline compositions that range from oxy-dravite to povondraite (O–P trend; Tab. 1), described by...Fig. 1 Tourmalines with compositions from oxy-dravite to povondraite, the O–P trend, occur in modern...et al. 2015). Most of the tourmaline grains are dravite, a composition typical for metamorphosed limestones |  | Harlaux, Matthieu, Kouzmanov, Kalin, Gialli, Stefano, Laurent, Oscar, Rielli, Andrea, Dini, Andrea, Chauvet, Alain, Menzies, Andrew, Kalinaj, Miroslav, Fontboté, Lluís (2020) Tourmaline as a Tracer of Late-Magmatic to Hydrothermal Fluid Evolution: The World-Class San Rafael Tin (-Copper) Deposit, Peru. Economic Geology, 115 (8). 1665-1697 doi:10.5382/econgeo.4762 | Journal (article/letter/editorial) | | Fe/(Fe + Mg) = 0.36 to 0.52, close to the schorl-dravite limit, and relatively high contents (10s to 100s...large compositional range that spans the schorl to dravite fields, with Fe/(Fe + Mg) = 0.02 to 0.83. Trace...as those of the Cornwall province in southwest England (e.g., Drivenes et al., 2015; Duchoslav et al....Tur 3) have compositions belonging to the schorl-dravite and foitite-Mg-foitite solid solutions (Figs. 7...has dravitic compositions, close to the schorl-dravite limit, with Fe/(Fe + Mg) = 0.36 to 0.52 and X□/(X□ |  | | Journal (article/letter/editorial) | | early-defined tourmaline species such as schorl and dravite were chemically characterized with a variety of...Al6 Si6O18 (BO3)3 (OH,F)4. By the 1960s, schorl, dravite and elbaite were the only tourmaline species (e...“grandfathered” names for the tourmaline species schorl, dravite, elbaite and uvite [redefined as fluor-uvite in...were the first to experimentally determine that dravite is stable to 865 °C at 200 MPa and 925 °C at 500...species (23 species) Subgroup 1 *R1+ Dravite Na Fluor-dravite Na Schorl Na Fluor-schorl Na Tsilaisite |  | | Book | | South West England Ternary plot of Nb, Zr and Ga for granitic rocks from South West England Plot of Rb...from South West England Plot of Sr vs. Ba for granitic rocks from South West England Ternary plot of...from South West England Map showing the principal vein deposits of South West England in relation to the...measurements in South West England Model isotherms at a depth of 6 km under South West England for the present day...model of natural convection around the Cornubian granite batholith UK china clay production and exports 1900-1992 |  | Trumbull, R. B., Garda, G. M., Xavier, R. P., Cavalcanti, J. A. D., Codeço, M. S. (2019) Tourmaline in the Passagem de Mariana gold deposit (Brazil) revisited: major-element, trace-element and B-isotope constraints on metallogenesis. Mineralium Deposita, 54 (3) 395-414 doi:10.1007/s00126-018-0819-z | Journal (article/letter/editorial) | | analyses of the tourmaline reference materials dravite (HS no. 108796) and schorl (HS no. 112566) from...repeatability from multiple analyses of the schorl and dravite individually (1 SD/mean) was 0.8 and 1.3‰, respectively...also used the average IMF value from schorl and dravite analyses combined to correct the measured 11B/10B...reference analyses (combining 25 schorl and 25 dravite results) yielded an R2 value of 0.959 (standard...fields 4 and 5 on the Al-rich side of the schorl-dravite join (Fig. 5b). As noted by previous studies, the |  | | 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 |
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