 | | Journal (article/letter/editorial) | | Associated with EconomicKaolinization,GoonbarrowChina Clay Pit, St. Austell, Cornwall, England:GeologicRelationships...primary igneousrock typesin the Goonbarrowchina clay pit, locatedin the upper Carboniferous(Westphalian)St...monzograniteseparatedby an asymmetricK-feldspar-tourmaline-biotite _ quartz pegmatite,the geometryof which indicatesinward...hydrothermalpro- Goonbarrowin 1855 (Barton,1966). The pit is also cesses has been suggested by someworkers...and a depth of '•180 m was clay pit, nearBugle,'•6 km northof St. Austell(pit reached(Dines,1956).The operations |  | | Journal (article/letter/editorial) | | 1887, when visits were paid to Carclaze and other clay works, and to Roche Rock. '*' The granite, where...smaller crystals. The mica, which includes both biotite and muscovite, carries lithium, and, under the...known as aplite are sometimes seen in the china-clay pits, but this rock is rare as compared with its...Unfortunately the exposures are now much overgrown and the pit is full of water,but specimens showing large fragments...smaller scale, have been met with in many of the clay pits. The quarries in the neighbourhood of Luxulyan |  | | Journal (article/letter/editorial) | | Accepted: 25 February 2019 # Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract The Cornwall...is porphyritic with coarse-grained tourmaline (±biotite), locally with megacrysts of alkali feldspar (up...Austell Granite St. Austell Granite Rostorack China Clay Pit, St. Dennis 50.37205 − 4.88185 279.8 ± 1.0 Bunny...Camborne, Cornwall. 500 µm OB-4. Rostorack China Clay Pit, St. Dennis, Cornwall. Qtz Cs Sd Cs 500 µm...two-mica porphyry containing Kfeldspar phenocrysts, biotite and muscovite, with a finegrained quartz–tourmaline |  | | Journal (article/letter/editorial) | | Magnetite xls, pyrite xls, tourmaline (black), biotite, chlorite, muscovite, garnet. Shaw Gold M. U/ Mi...blende (green-black) ; chlorite, magnet ite, biotite, muscovite. M i Bushy Gold M. l / - N E of Moss... kaolin (limonite stained), pyrite, sericite, biotite, musco vite, hornblende (green), pyrrhotite, zir...sults obtained. There is also about four feet of clay-gravel on the bottom of the creek that is very difficult...hematite, felds par, sericite, chlorite, calcite, biotite, amphibole, tremolite, pyrrhotite, ilmenite, marcasite |  | | Journal (article/letter/editorial) | | THE EIFEL VOLCANIC FIELD (FEDERAL REPUBLIC OF GERMANY): CONSTRAINTS ON AGE AND DURATION OF A MIDDLE PLEISTOCENE...Republic (Accepted and HELMUTH Univemity, of Germany) for publication Heidelberg, HRADETZKY D-6900...determinations Eifel volcanic field (Federal Republic of Germany): Constraints on age and duration of a Middle Pleistocene...Rhine and Wetterau areas, Federal Republic of Germany, were dated by sanidines, using the 40Ar/39Ar age...type of correlation were collected in an area in Germany called Wetterau (Fig. 1). In this case the nomenclature |  | | Journal (article/letter/editorial) | | various processes used in the recovery of china-clay for the market. APRIL 16TH. The party left the hotel...eight miles reached the Lantern Clay Works, near Bugle. This ,clay-pit, although small as compared with...processes through which the clay passes, from its occurrence in the pit to the final, marketable, product...displayed here. The party first made their way to the clay-pit, from the top of which the Director gave a short...The material constitutes part of the waste of a clay-pit, and in the excavation of the altered granite |  | | Book | | Martin Meschede Laurence N. Warr The Geology of Germany A Process-Oriented Approach Regional Geology...Reviews Series editors Roland Oberhänsli, Potsdam, Germany Maarten J. de Wit, Nelson Mandela University, Port... Martin Meschede • Laurence N. Warr The Geology of Germany A Process-Oriented Approach 123 Martin Meschede...and Geology University of Greifswald Greifswald, Germany Laurence N. Warr Institute of Geography and Geology...Geology University of Greifswald Greifswald, Germany ISSN 2364-6438 ISSN 2364-6446 (electronic) Regional |  | | Journal (article/letter/editorial) | | predominant rock-types are coarse porphyritic biotite granites containing varying proportions of potassium...ffiwm, i'tJ, bracket.s) 25/P Coarse porphyritic biotite granite. Pedn men Du, Sennen Cove, Land's End granite...granite (S.W. 348263). 33/P Coarse porphyritic biotite granite. Cripples Ease quarry. Land's End granite...granite (S.W. 501368). 48/1) Coarse porphyritic biotite granite. Staple Tor, Dartmoor granite (S.W. 543760)...As above. 63/P Quartz-tourmaline rock. I~endra clay pit, St. Austell granite (S.W. 959566). 661P Quartz-tourmaline |  | | Journal (article/letter/editorial) | | districts of which Morenci is an outstandingexample. The clay minerals occur in the sulphideore and are chara...characteristicallyearlier than sericite. The more important clay minerals include hydromuscovite,kaolinite, allophane...the sericitic alteration and less commonlywith biotite. Pyrite often accompanies sericite but at San Manuel...ore body,this alterationis most pronouncedin the pit area. Following consolidation,the monzonitewas extensivelyfractured...the amount visible in the pit was small. Throughout much of the area of the pit, fine-grain pink orthoclase |  | | Book | | St.Austell Gunheath China Clay Pit, St.Austell Goonbarrow China Clay Pit, St.Austell ACTINOLITE Ca2(Mg...acquired 1987. Requires analysis. Goonbarrow China Clay Pit, St.Austell AKAGANEITE β-Fe3+O(OH). 8SLBM C.Sparrow...Quarry, Tintagel Gunheath China Clay Pit, St.Austell Blackpool china clay Pit, St.Austell ARTHURITE CuFe32+(AsO4...Hingston Down Quarry, Calstock Gunheath China Clay Pit, St.Austell Cligga Head Mine, Perranzabuloe ASBOLANE...Cleer Old Gunnislake Mine, Calstock Gunheath China Clay Pit, St.Austell BARBOSALITE Fe2+Fe 3+2(PO4)2(OH)2 |  | | Journal (article/letter/editorial) | | Animas, Atocha, Bolivia, stannite, 1045. Ankerite, Germany, thermal decomposition of, 138. An]~ole, Uganda...Rosia (Siena), Italy, 1037. Belnhausen, Darmstadt, Germany, ankerite, 138. Benallt mine, Caernarvon~hire...large chondru]e in the ParnaUee meteorite, 319. Biotite, infra-red absorption spectrum, 325. BIRLE (JOHN...Mexico, thermal decomposition, 976. Blaclcpool clay pit, St. Austell, Cornwall, tourmaline, 1078. Blithfield... barian sanidine, 914. Elgersburg, Thuringia, Germany, pyrolusite pseudomorphous after manganite, 274 |  | | Journal (article/letter/editorial) | | second and fifth largest in the world. 87% of china clay produced in Devon and Cornwall, and 70% of Czech...companies, Redlandand Goonvean and Rostowrack China Clay (operating in Cornwall) and Watts Blake Bearne and...at Kaznejov and 80 to 110 m at Horni Briza. The clay deposits are selectively dry mined, based on kaolin...and glass fibre and ceramics (37%). The yield of clay from the kaolinitic sands and kaolinitic conglomerates...tiles, refractories and also 36,000 tpa of a filler clay. The deposit is a sequence of Carboniferous (Westphalian) |  | | Journal (article/letter/editorial) | | precipitated calcium carbonate in paper, the china clay industry in south-west England has been under attack...wilson@btinternet.com). INTRODUCTION The production of china clay (kaolin) in 2001 from Devon and Cornwall, south-west...of the Belgium Sibleco Group) operating in Devon. Clay bearing ground in mid Cornwall covers 40 km2 and...plastics). This paper reviews the history of the china clay industry since kaolin was first discovered at Tregonning...kaolin deposits, resources of kaolin, operating china clay companies and their production capacities, some |  | | Report (volume) | | Ball Clay and Bentonite Deposits of the Central and Western Gulf of Mexico Coastal Plain, United States...GEOLOGICAL S O R ¥ E Y B 0 L L E T I N 1^ Ball Clay and Bentonite Deposits of the Central and Western...BULLETIN 1558-C Geology and geologic setting of ball clay and bentonite deposits UNITED STATES GOVERNMENT...Data Hosterman, John W. (John Wallace), 1923Ball clay and bentonite deposits of the Central and Western...Bibliography: p. Supt. of Docs, no.: I 19.3:1558C 1. Ball clay Gulf Coast (U.S.) 2. Bentonite Gulf Coast (U.S.) |  | Chesley, J.T., Halliday, A.N., Snee, L.W., Mezger, K., Shepherd, T.J., Scrivener, R.C. (1993) Thermochronology of the Cornubian batholith in southwest England: Implications for pluton emplacement and protracted hydrothermal mineralization. Geochimica et Cosmochimica Acta, 57 (8) 1817-1835 doi:10.1016/0016-7037(93)90115-d | Journal (article/letter/editorial) | | Max-Plank-Institut f& Chemie, &a&raw 23, D-6500 Mainz, Germany 4 British Geological Survey, Keyworth, Nottingham...deposits of southwest England are associated with biotite-muscovite granites that intruded upper Paleozoic...Crafty Mine / ‘Hemerdon W-Mine \ G&&arrow Clay Pit 0 4O kilometers 50-h L(b FIG. I. (a) Generalized...predominantly of coarse-grained, peraluminous, biotite, and biotitemuscovite granites similar to the S-type...90% of the exposedgranite is a caarse-grained biotite-muscovite granite (CGBG), with turbid megacrysts |  | | Report (issue) | | Consultative Committee Mineral Dossier No 26 China Clay by D E Highley, BSc, MIMM, MIGeol Minerals Strategy...No7 Salt No8 Sulphur No 9 Tin No10 Talc No11 Ball Clay No12 Slate No13 Gypsum and Anhydrite No14 Gold ...Rock Bauxite, Alumina and Aluminium Perlite Common Clay and Shale Limestone and Dolomite Fireclay Silver...request. Acknowledgements The help of The China Clay Association; English Clays Lovering Pochin and Co...Bearne and Co. PLC; The Goonvean and Rostowrack China Clay Co. Ltd, and Steetley Minerals Ltd in giving information |  | | Journal (article/letter/editorial) | | pluton is a variably porphyritic, coarsegrained, biotite/tourmaline ± muscovite, monzogranite/syenogranite...a core of strongly porphyritic, coarsegrained, biotite syenogranite, intruded by an even-grained syenogranite...intrusion consists of porphyritic (megacrystic) biotite granite in the south and a NE-trending tabular...Dartmoor granites represent a suite evolving from biotite granite to tourmaline granite. The diveristy of...Britain. The pluton is essentially composed of biotite monzogranite and quartz monzonite though numerous |  | | Report (volume) | | Clay Deposits of Spokane County Washington By JOHN W. HOSTERMAN GEOLOGICAL SURVEY BULLETIN 1270...region_______________________________________ Geology of clay-bearing units_______________________________________...minerals________________________________________________ Clay deposits_____________________________________________________...________ Excelsior clay pit and deposit_______________________________ Mica clay pits and deposit___..._______ Freeman clay pit and deposit_______________________________ Valleyford clay deposit_________ |  | | Journal (article/letter/editorial) | | GUIDE TO FIELD TRIP OF FOURTH NATIONAL CLAY CONFERENCE: CLAY MINERALS IN SEDIMENTARY ROCKS 1 By J. C...University Park, Pennsylvania CLAY MINERALS IN SEDIMENTARY ROCKS Clay minerals occur most commonly as...constituents of sedimentary rocks and nearly all the clay mineral species, with the possible exception of...nacrite, have been found in sediments. Different clay minerals occur in different kinds of sediments and...occur in all four kinds. Generally in sandstones the clay minerals form the main constituents of the matrix |  | | Journal (article/letter/editorial) | | ammonium ion can be held by potassium feldspar, biotite or muscovite; in hydrothermally altered rocks it...greisenization, the minerals K-feldspar, plagioclase and biotite are unstable and their progressive elimination...severely altered end-product, as exploited for china-clay, is a white plastic material which contains residual...granite were collected from working and former china clay pits and from surface exposures in areas of kaolinization...working face of an (until recently) operating china clay pit and is compared with fresh granite from Geevor |  | | Report (issue) | | Carolina slate belt contains foliated granitic rocks, biotite gneiss, phyllite, and fine-grained amphibolite...oldest rocks of the Charlotte belt are mica schist, biotite gneiss, quartzite, and amphibolite. These rocks...LEFT on County Road 29-66. 22. 2 0.9 STOP 1: Clay pit of Ashe Brick Co, of Van Wyck, S. C. Removal of...a strike of about N 60° E. Folds observed in the pit at various stages of excavation range in wave length...Triassic (?) diabase dikes trend NW through the pit and show effects of thermal metamorphism on the surrounding |  | | Catalog/List | | ARGENTITE, PROUSTITE and FLUORITE. Annaberg, Hartz, Germany. A thin piece of matrix showing areas of crystalline...parallel growth. Without matrix. 70x60x25mm. £95. 4 BIOTITE. Trelavour Down, St Dennis, Cornwall. A nice clean...clean curved mass of silvery brown biotite without matrix. 160x80x25mm. £15. 10) BOURNONITE. Herodsfoot... Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Germany. Four jet black cassiterite xls to 7mm and about...43) NATIVE SILVER. Himmelsfurst Mine, Saxony, Germany. A small heavy mass showing native silver as tarnished |  | | Catalog/List | | ARGENTITE, PROUSTITE and FLUORITE. Annaberg, Hartz, Germany. A thin piece of matrix showing areas of crystalline...parallel growth. Without matrix. 70x60x25mm. £95. 4 BIOTITE. Trelavour Down, St Dennis, Cornwall. A nice clean...clean curved mass of silvery brown biotite without matrix. 160x80x25mm. £15. 10) BOURNONITE. Herodsfoot... Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Germany. Four jet black cassiterite xls to 7mm and about...43) NATIVE SILVER. Himmelsfurst Mine, Saxony, Germany. A small heavy mass showing native silver as tarnished |  | | Journal (article/letter/editorial) | | considerable number have been taken out of the Boulder-clay, and some few from the gravel,beds which underlie...considerable depth, while here and there the London Clay comes to the surface. The way in which the superficial...were between six and seven feet of chalky Boulder-clay, part of which only was uncovered, resting upon...being very plainly striated. Between the chalky clay and the laminated clays a large block of Jurassic...similar block sticking out from under the Boulder-clay, about a hundred yards away from this section in |  | | Journal (article/letter/editorial) | | vein tourmaline, Old Beam mine, Goonbarrow china clay pit; (c) Mg-rich cores with Fe-rich rims, set in quartz...in this study. 1) Granitic rocks Porphyritic biotite granite, Tregarden quarry, Luxulyan SX 053 590...Goonbarrow, St Austell SX 008 585 Great Wheal Prosper Pit, Roche SX 000 586 5) Hydrothermal breccias Wheal...extreme than the biotite and tourmaline granites. On closer inspection of the data, the biotite granite and...R2+ R3+ R++R2+ F/F+M+M Samples: 1. Megacrystic biotite granite, Luxulyan quarry, St. Austell pluton. 2 |
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