DOCSLIB.ORG

DONNAYITE, Nagast'y(CO,),.3H,O, a NEW MINERAL from MONT ST

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
DONNAYITE, Nagast'y(CO,),.3H,O, a NEW MINERAL from MONT ST Canadian Mineralogist Vol. 16, pp. 335-340 (1978) DONNAYITE,NaGaST'Y(CO,),.3H,O, A NEW MINERALFROM MONTST.HILAIRE, QUEBEC GEORGB Y. CHAO, PAUL R. MAINWARING aNp JUDITH BAKER Departmentol Geology,Carleton University, Ottawa, Ontario KIS 586 ABsrRAcr nite. Elle forme des groupements syntaxiques avec l'6waldite, l'6waldite strontique, la mackelveyite et, pegmatite Donnayite occurs in dykes, miarolitic mais rarement, avec la synchisite. Le facids des cavities and interstices in nepheline syenite at Monr cristaux est variable: aplati, tabulaire, prismatique, St-Hilaire, Qu6bec. Usually associated with en forme de soucoupe ou de tonnelet, en masses microcline, analcime, calcite, natrolite, chlorite, grenues. Ces cristaux, dont la taille oscille entre aegirine, arfvedsonite and other minerals, donnayite 0.05 et 2mm, sont normalement de couleur jaune commonly occurs in syntactic intergrowths with ou jaune p6.le,parfois incolores, blancs, gris, bruns ir ewaldite, a Sr analogue of ewaldite, mckelveyite, rougeAtres, i poussidre blanche et 6clat vitreux. and rarely with synchysite. Crystals, 0.05 to 2 mm, Duret6 3. Dor" 3.30, D",1" 3.266, Clivage paralldle vary in habit from platy, tabular, columnar, saucer- i la base (plan du facids tabulaire), indistinct ou shaped, barrel-shaped to irregularly granular; they assez bon. Ce min6ral est soluble dans HCI aves are usually pale yellow to yellow, but also colorless, forte effervescence.Observations optiques: cu 1.551 white, grey, brown to reddish brown, with a white - 1.561, 1.646"t 1.652,2V (-) 0-20", X = c*. - P streak and vitreous lustre. Hardness 3. Dore = La donnayite est isomorphe de la weloganite, tri- 3.30 and Dcarc= 3,266 g/cmg. Basal cleavage in- clinique Pl, a 9.000, b 8.999, c 6.7934, q 702.77, distinct to fair. Dissolves in HCI with strong effer- P 116.28, ^y 59.99", Z - L (maille non-convention- vescence.Optically, biaxial negative, with a 1.551- nelle pour montrer l'isomorphie). Pour les neuf p L.561, 1.646, y 1.652,2V 0--20", X = cr'. Don- raies les plus intenses du diagramme de poudre, nayite is isomorphous with weloganite (as shown by 6.103 (4) (001), 4.368 (7)(120, ztl, tr0), 3.209 the following unconventional setting): triclinic Pl, (3)(r2r, r1r, 2r2), 2.839(10) (2lL,rlL r22),2.s98 a 9.000, b 8.999, c 6.7934., a 102.77, p tt6.28, (4)(33I, 030, 301),2.038 (3) (310, 1r3, 2ry,003), y - 59.99', Z t. The nine strongest powder dif- 2.0_18(3) (242, 222, 420), 1.978_(3)_(333, 3Q3- fraction lines are: 6.103 (4)(001), 4.368 (7)(120, 032,032,301,33 1), 1.694 (3) (542, 5L2,140,150, 4rl, ztT, tl,q, 3.209(3)(t2t, tll, 2tZ), z.B3g(10) 45T,214, Maclestrds fr6quentes: par rotation (zLr, 113). rlL r2l), 2.598(4) (33T, 030, 301),_2.038 (3) [103L20";par r6flexion(010), (3OI), (l3l). La sonde (310,r13, 2t2, 00_3,(2j018 (3) (242,222, 420), 6lectroniquedonne Na2O 3.37, CaO 5.75, BaO 1.928(.3) (333, 303, 032,032,301, 331), 1.694 (3) 0.85,SrO 35.8 Yrq 13.1,NdrOB 1.83, LazOa 0.45, (542,5tl, tao, 150,4T1, 4sT,214, tI3). Twin- CO, (30.98),HrO (6.34), total 98.47Vo(on admet ning by rotation about [103]rroo and bV reflection que COz et HzO sont stoechiomEtriques).Cette ana- across (010), (3OT)or (3:t) is extremely common. lyse conespond ir Nao.rr(Cao.s?Ndo.osllao.or)(Srr.r" Electron microprobe analysis gives: Na2O 3.37, Bao.or)Yo.ee(COs)s.3H2O, soit id6alementNaCaSr3 CaO 5,75, BaO 0.85, SrO 35.8, Y2Os 13.1, NdrOs Y(CO3)..3HrO. La mackelveyite,r6examin6e, s'avd- 1.83, La2O3 0.45, COz (30.98), HrO (6.34), sum re triclinique,isomorphe de weloganiteet donnayite; 98,47Vo,CO2 and HzO are assumedto be stoichio- sa compositionoriginelle peut s'6crire (Nat.*Ii.or) metric. The analysis corresponds to Na6.rr(Cae.37 (Cao.zsUo.rz)(Ba2.z2sr0.r7) (Y0.?oREoje) (CO3)0.3.48H2O, Nd6.eel.as.m)(Srr.ssBae.e5) Yo.go(COa)6.3HrO, or ideal- soit NaCaBasY(COs)o.3HrOcomme formule id6a1e. ly NaCaSrgY(COe)6.3H2O. New data show that mckelveyite is also triclinic, isomorphous with (fraduit par la R6dactiotr) weloganite and donnayite; its original analysis may be recalculated to (Nar.rrKn.62)(Cae.7sU o.rr) (Bzr.r, INTRoDUcTIoN Sro.rz)(Yo.zoREo.rr) (CO")..3.48HrO, close to NaCa- Ba3Y(COs)6.3HsO. ln 7973 a specimen from mont St-Hilaire, 'obrockite" Qu6bec, labeled was sent by D. W. Sorvrvrens Richerson to one of us (GYC) for verification. The specimen is composed of arfvedsonite, La donnayite pr6sente pegma- se dans des dykes aegirine, calcite, sphalerite and minor amounts titiques, cavit6s miarolitiques et fissures dans ia of the intersticesof coarse mi- sy6nite i n6ph6line du mont St-Hilaire, dans la catapleiite filling province de Qu6bec. Elle s'y trouve ordinairement crocline crystals.The so-called"brockite" occurs associ6e aux espbces suivantes: microcline, analci- as aggregatesof approximately 0.5mm tabular me, calcite, tratrolite, chlorite, aegyrine, arfvedso- crystals which usually display rough, irregular 335 336 THE CANADIAN MINERALOGIST Frc. 1. Scanning el€ctron photomicrographs of donnayite. (a) Parallel growth or twinned crystal aggregate (1 mm dia.). (b) White tabular crystals (1 mm) of donnayite with brownish-red globular gaidonnayite crystals. (c) Saucer-shapedcrystals (0.2 mm). (d) Columnar (1 mm long) aggregatesdisplaying crystals with pedial termination. (e) Barrel-shaped crystal (1.5 mm long). (f) Hemimoryhic crystals (0.2 mm) with pedial termination. DONNAYITB, A NBW MINERAL FRolvI ST-IIILAIRE 337 and somewhat curved surfaces with an overall and Mineral Names, I. M. A. The tnre speci- hexagonal crystal outline. Some. crystals are mens are deposited at the National Museum of transparent with a pale yellow color but most Natural Sciences, Ottawa (Specimen #39394, crystals show a gradation of color from pale 39395,39396) and the Royal Ontario Museum, yellow and transparent near the rim to dark Toronto (specimen # M35222). reddish brown and alrnost opaque totrard the core. Under high mapification, with a scan- OccunnsNcr AND PrrysrcAr, PnoprnrrBs ning electron mictoscope, each "crystal" was found to be composed of numerous individuals Donnayite occurs in small quantities in the in sub-parallel to parallel growth (Fig. 1a), too pegmatite dykes, miarolitic cavities and inter- small to be separated for single-crystal X-ray stises in the nepheline syenite at Mont St-Hi- work. Preliminary optical and X-ray studies laire, Qu6bec. The mineral is usually associated together with electron microprobe analyses in- with microcline, analcime, natrolite, calcite, dicated the mineral to be a new species, a chlorite, aegirine, arfvedsonite and minel Y-bearing analogue of weloganite (NazSrZr amounts of siderite, rhodochrosite, ancylite, (COg)e.3HO: Chen & Chao 1975, Grice & pyrite, sphalerite, hematite, goethite, pyrophan- Perrault 1975). However, due to the small ite, catapleiite, gaidonnayite and astrophyllite. amount of material available and the lack of Crystals are usually very small, from 0.05 to truly single crystals, a complete description of l.0mm, rarely 2.0mm. The mineral is common- the mineral was not possible and the mineral ly pale yellow to yellow, but also colorless, was therefore tentatively designated UK33. white, grey and rarely reddish brown due to A year later, the mineral was again en- hematite inclusions. The streak is white. The countered in small quantities in varied mineral mineral is transparent with a vitreous lustre, associations, habits and colors on newly col- but the white and grey varieties are opaque ard lected specimens and on specimenssent to us earthy. Crystals with vitreous lustre have a hard- for verification from several advanced mineral ness about 3 on the Mohs ssale whereas the collectors. It became possible, therefore, to earthy material is apparently softer. An in- gather sufficient data for characterizing this distinct to fair basal cleavageis present. Density new species. The mineral has been named don- determined by the flotation method is 3.30(1) nayite, after Professon J. D. H. Donnay and g/cms. The mineral dissolves rapidly in 1:1 G. Donnay, in recognition of their contributions HCI with strong effervescence. to the fields of crystallography and mineralogy. Donnayite crystals generally display apparent Both the mineral and its name have been ap- trigonal or hexagonal symmetry with various proved by the Commission on New Minerals habits from platy, tabular (Fig. 1b), saucer- Frc. 2. Scanning electron photomicrographs of polycrystals produced by syntactic intergrowth of donnayite with other minerals. (a) Hemimorphic polycrystals (1.5-2.0 mm long) of ewaldite (dark bands) and donnayite (hghter bands) with a donnayite 'tay''(D). The polycrystals are white and opaque, the "caps" are pale yellow and transparent. O) A doubty terminated hemimorphic polycrystal (2.0 mm long) of ewaldite and its Sr analogue with "caps" of donnayite(D) and mckelveyite(M). 338 TIIB CANADIAN MINERAI'GIST shaped (Fig. 1c), columnar (Fig. 1d), barrel- X-Rev CRYSTALLocRAPHY (Fig. granular. shaped 1e) to irregularly Some Crystals of donnayite used for the single- crystals are clearly hemimorphic, with curved crystal X-ray diffraction study were first trigonal pyramidal faces converging toward a checked optically for identity and possible in- point on one end and terminated with a flat tergrowth of other minerals using a spindle pedion on the other @ig. 1f). As with the stage and then by X-ray using a 114.6 mm minerals in the bastnaesite-synchysite family diameter Gandolfi camera. The precessionpho- @onnay & Donnay 1953), donnayite common- tographs show that donnayite is triclinic, pseu- ly forms syntactic intergrowths with other min- dorhombohedral and isomorphous with welo- erals of similil strucfure and shemical composi- ganite (Table 1).
Load more

Recommended publications
  • Infrare D Transmission Spectra of Carbonate Minerals
    Infrare d Transmission Spectra of Carbonate Mineral s THE NATURAL HISTORY MUSEUM Infrare d Transmission Spectra of Carbonate Mineral s G. C. Jones Department of Mineralogy The Natural History Museum London, UK and B. Jackson Department of Geology Royal Museum of Scotland Edinburgh, UK A collaborative project of The Natural History Museum and National Museums of Scotland E3 SPRINGER-SCIENCE+BUSINESS MEDIA, B.V. Firs t editio n 1 993 © 1993 Springer Science+Business Media Dordrecht Originally published by Chapman & Hall in 1993 Softcover reprint of the hardcover 1st edition 1993 Typese t at the Natura l Histor y Museu m ISBN 978-94-010-4940-5 ISBN 978-94-011-2120-0 (eBook) DOI 10.1007/978-94-011-2120-0 Apar t fro m any fair dealin g for the purpose s of researc h or privat e study , or criticis m or review , as permitte d unde r the UK Copyrigh t Design s and Patent s Act , 1988, thi s publicatio n may not be reproduced , stored , or transmitted , in any for m or by any means , withou t the prio r permissio n in writin g of the publishers , or in the case of reprographi c reproductio n onl y in accordanc e wit h the term s of the licence s issue d by the Copyrigh t Licensin g Agenc y in the UK, or in accordanc e wit h the term s of licence s issue d by the appropriat e Reproductio n Right s Organizatio n outsid e the UK. Enquirie s concernin g reproductio n outsid e the term s state d here shoul d be sent to the publisher s at the Londo n addres s printe d on thi s page.
    [Show full text]
  • Thirty-Fourth List of New Mineral Names
    MINERALOGICAL MAGAZINE, DECEMBER 1986, VOL. 50, PP. 741-61 Thirty-fourth list of new mineral names E. E. FEJER Department of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD THE present list contains 181 entries. Of these 148 are Alacranite. V. I. Popova, V. A. Popov, A. Clark, valid species, most of which have been approved by the V. O. Polyakov, and S. E. Borisovskii, 1986. Zap. IMA Commission on New Minerals and Mineral Names, 115, 360. First found at Alacran, Pampa Larga, 17 are misspellings or erroneous transliterations, 9 are Chile by A. H. Clark in 1970 (rejected by IMA names published without IMA approval, 4 are variety because of insufficient data), then in 1980 at the names, 2 are spelling corrections, and one is a name applied to gem material. As in previous lists, contractions caldera of Uzon volcano, Kamchatka, USSR, as are used for the names of frequently cited journals and yellowish orange equant crystals up to 0.5 ram, other publications are abbreviated in italic. sometimes flattened on {100} with {100}, {111}, {ill}, and {110} faces, adamantine to greasy Abhurite. J. J. Matzko, H. T. Evans Jr., M. E. Mrose, lustre, poor {100} cleavage, brittle, H 1 Mono- and P. Aruscavage, 1985. C.M. 23, 233. At a clinic, P2/c, a 9.89(2), b 9.73(2), c 9.13(1) A, depth c.35 m, in an arm of the Red Sea, known as fl 101.84(5) ~ Z = 2; Dobs. 3.43(5), D~alr 3.43; Sharm Abhur, c.30 km north of Jiddah, Saudi reflectances and microhardness given.
    [Show full text]
  • X-Ray Crystallography of Weloganite
    Canadian Mineralogist Vol. 13, pp. 22-26 (1975) X-RAY CRYSTALLOGRAPHYOF WELOGANITE T. T. CHEN AND G. Y. CHAO Department of Geology, Caileton ()nLversity, Ottawa, Ontario KIS 5B6 ArsrRAc"r cvystal .r-ray studies. It was hoped that once tle cell geometry of weloganite Single-crystalr-ray studies of weloganite showed was established the cell parameters of the unknown yttrium mineral tlat the mineral is triclinic, PL ot pi, with a - might be derived from tle powder q:9-8q(.1),,: 8.988(1), : diffrastion c 6.730(t)A,a : data by its l0-2.84(r), p : tt6.42e) and - isomorphous relationship to weio- ? 59.99(1)..'sub- ganite. Weloganite has a pronounced rhombohedral cell which resemblesin geometry that of rhombo- The problems of weloganite may be outlined hedral carbonates.It also displays a pseudo-mono- ao follows: clinic cell that, correspondsto the cell reported by (1) The space group P3r, s is one of the few in other authors for the monoclinic polytypo of welo- which no minerals and only a few chemical com- ganite. Twinning by [103]r:oois very common, with pounds are found, as Sabina et al. (7968) twin - cor- obliquity @ = 0 and twin index r 3. The rectly pointed out. twin cell is trigonal and is identical to the cell orig- (2) If the published chemical analyses and space inally assignedto weloganite. The ideal chemical group symmetry (Sabina et al. formula for weloganite is proposed as Narsrlr L968; Gait & - Grice 1971) (COs)B.3Hrowith Z - 1 for the triclinic cell. are correct they would require the positional disorder of Sr, Na andZr atomswhich IutnopuctroN crystal-chemically are drastically different.
    [Show full text]
  • Wei.Oganite, a New Strontium Zirconium Carbonate From
    WEI.OGANITE,A NEW STRONTIUMZIRCONIUM CARBONATE FROMMONTREAI ISLAND, CANADA ANN P.SABINA, J. L. JAMBORaNo A. G. PLANT GeologicalSurztey of Canad,a,Ottawa AssrRAcr Weloganite occurs in an alkalic sill which has intruded Ordovician limestone at St-Michel, Montreal Island, Quebec. Chemical analysis of the new mineral gave SrO41.0,2rOg19.4,CO232.2,H2O6.6, sum 99.2, corresponding to SrsZrzCs.aHe.aOaz.z, ideally SroZrzCsHeOar. Weioganite ittrigonal, spacegroup P31,2,hexagonal dimensionso : 8.96, c : 18.06A, D^ : 3.22, D" : 3.26 f.or Z :2. The strongest lines of the r-ray powder pattern are 2.81A (10),4.35 (9), 2.59 (7),2.2n Q),2.009 (7). The mineral occurspredominantlv as yellow crystals which are roughly hexagonal in outline and typically irregular in widtl. IurnooucrroN The new mineral weloganite was discovered during an investigation of mineral occurrences in the Montreal area in the summer of 1966. Weloganite occurs in an alkalic sill, 5 to 10 feet thick, which has intruded Trenton (Ordovician) limestone at St-Michel, Montreal Island, Quebec. The general geology has been described by Clark (1952) who regards the dykes and sills in the area as satellitic rocks genetically related to the plutonic alkalic intrusions forming the core of Mount Royal, one of the Monteregian Hills. The sill in which weloganite occurs is about four and a half miles north of Mount Royal and is well exposed in the limestone quarry operated by Francon (1966) Limit6e. A report on the petrology of the sill will be given at alater date by L.
    [Show full text]
  • Sabinaite, a New Anhydrous Zirconium.Bearing
    eanadian Mineralogist Vol. 18, pp. 25-29 (1980) SABINAITE,A NEWANHYDROUS ZIRCONIUM.BEARING CARBONATE MINERAL FROMMONTREAL ISLAND, OUEBEC J.L. JAMBOR CANMET, 555 Booth Street, Ottawa, Ontalio KIA 0G1 B.D. STURMAN Departrnentof Mineralogy and Geology, Royal Ontario Museum,Toronto, Ontario MsS 2C6 G.C. WEATHERLY Departmentol Metallurgt and Materials Science, University of Toronto, Toronto, Ontario MSS 1A4 Ansrnecr rant au maximum 0.01 x 0.001 mm. Biaxe nEgative, 2y 85o, a 1.74Q), p 1.80(2), v 1.85(1), X presque Fine-grained, white, powdery coatings and chalky perpendiculaire aux plaquettes. L'analyse donne aggregatesof sabinaite occur in vugs in a dawsonite- NazO 20.7, CaO 0.2, ZrO,39.l, HfO, 0.47. TiO, rich silicocarbonatite sill at Montreal Island, Qu6- 12.0, CO,27.1, total 99.57 (poids). La sabinaite bec. The mineral is platy, roughly pseudohexagonal, est anhydre; sa teneur en fluor est n6gligeable; with maximum dimensions 0.01 x 0.001 mm, biaxial sa formule est (Na,Ca)a.ra(Zr,Hf)o.2oTit.nrO".rn negative with 2V 85", c 1.74(2), P 1.80(2), v (COi)8.10 soit, idfulement, Nalra+JirO"(CO.)6, r 1.85(1), X nearly normal to the plates. Analyses - O.25. Elle ne r6agit pas avec les acides froids, gave NarO 20,7, CaO 0.2, ZrOz 39.1, IIfOn O.47. mais est soluble avec effervescencedans HCI chaud. TiO12.0, CO2 nJ, total 99.57 wt. Vo. Sabinaite La sabinaite est monoclinique; les dimensions de is anhydrous and has low or neelieible F.
    [Show full text]
  • Systematics and Crystal Genesis of Carbonate Minerals
    ГОДИШНИК НА МИННО-ГЕОЛОЖКИЯ УНИВЕРСИТЕТ “СВ. ИВАН РИЛСКИ”, Том 49, Св. I, Геология и геофизика, 2006 ANNUAL OF THE UNIVERSITY OF MINING AND GEOLOGY “ST. IVAN RILSKI”, Vol. 49, Part I, Geology and GeopHysics, 2006 SYSTEMATICS AND CRYSTAL GENESIS OF CARBONATE MINERALS Ivan Kostov, Ruslan I. Kostov University of Mining and Geology “St. Ivan Rilski”, Sofia 1700; [email protected] ABSTRACT. A dual crystal structural and paragenetic principle (Kostov, 1993; Kostov, Kostov, 1999) Has been applied to a rational classification of tHe carbonate minerals. Main divisions (associations) are based on geocHemically allied metals in tHe composition of tHese minerals, and subdivisions (axial, planar, pseudoisometric and isometric types) on tHeir overall structural anisometricity. The latter provides botH structural similarity and genetic information, as manner of crystal groWtH in geological setting under different conditions of crystallization. The structural anisometricity may conveniently be presented by tHe c/a ratio of tHe minerals WitH HigH symmetry and by tHe 2c/(a+b), 2b/(a+c) and 2a/(b+c) ratios for tHe loW symmetry minerals. The respective ratios are less, nearly equal, equal or above 1.00. The unit cell or sub-cell and tHe corresponding structures are denoted as axial or A-type, pseudo-isometric or (I)-type, isometric or I-type and planar or P- type, notations WHicH correspond to cHain-like, frameWork and sHeet-like structures, respectively ino-, tecto- and pHyllo-structures. The classification includes tHree geocHemical assemblages among tHe carbonate minerals – Al-Mg-Fe(Ni,Co,Mn), Na-Ca-Ba(К)-REE and Zn-Cu-Pb(U). СИСТЕМАТИКА И КРИСТАЛОГЕНЕЗИС НА КАРБОНАТНИТЕ МИНЕРАЛИ Иван Костов, Руслан И.
    [Show full text]
  • Infrared and Raman Spectroscopic Characterization of the Carbonate Mineral Weloganite – Sr3na2zr(CO3)63H2O and in Comparison with Selected Carbonates ⇑ Ray L
    Journal of Molecular Structure 1039 (2013) 101–106 Contents lists available at SciVerse ScienceDirect Journal of Molecular Structure journal homepage: www.elsevier.com/locate/molstruc Infrared and Raman spectroscopic characterization of the carbonate mineral weloganite – Sr3Na2Zr(CO3)6Á3H2O and in comparison with selected carbonates ⇑ Ray L. Frost a, , Yunfei Xi a, Ricardo Scholz b, Fernanda Maria Belotti c, Mauro Cândido Filho d a School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane Queensland 4001, Australia b Geology Department, School of Mines, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG 35,400-00, Brazil c Federal University of Itajubá, Campus Itabira, Itabira, MG 35,903-087, Brazil d Mining Engineer Department, School of Mines, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG 35,400-00, Brazil highlights " We have studied the mineral weloganite Na2Sr3Zr(CO3)6Á3H2O using vibrational spectroscopy. " Weloganite is member of the mckelveyite group, that includes donnayite-(Y) and mckelveyite-(Y). " A comparison is made with the spectra of weloganite with other carbonate minerals. article info abstract Article history: The mineral weloganite Na2Sr3Zr(CO3)6Á3H2O has been studied by using vibrational spectroscopy and a Received 13 December 2012 comparison is made with the spectra of weloganite with other carbonate minerals. Weloganite is mem- Received in revised form 5 February 2013 ber of the mckelveyite group that includes donnayite-(Y) and mckelveyite-(Y). Accepted 5 February 2013 The Raman spectrum of weloganite is characterized by an intense band at 1082 cmÀ1 with shoulder Available online 12 February 2013 À1 2À bands at 1061 and 1073 cm , attributed to the CO3 symmetric stretching vibration.
    [Show full text]
  • 1 Geological Association of Canada Mineralogical
    GEOLOGICAL ASSOCIATION OF CANADA MINERALOGICAL ASSOCIATION OF CANADA 2006 JOINT ANNUAL MEETING MONTRÉAL, QUÉBEC FIELD TRIP 4A : GUIDEBOOK MINERALOGY AND GEOLOGY OF THE POUDRETTE QUARRY, MONT SAINT-HILAIRE, QUÉBEC by Charles Normand (1) Peter Tarassoff (2) 1. Département des Sciences de la Terre et de l’Atmosphère, Université du Québec À Montréal, 201, avenue du Président-Kennedy, Montréal, Québec H3C 3P8 2. Redpath Museum, McGill University, 859 Sherbrooke Street West, Montréal, Québec H3A 2K6 1 INTRODUCTION The Poudrette quarry located in the East Hill suite of the Mont Saint-Hilaire alkaline complex is one of the world’s most prolific mineral localities, with a species list exceeding 365. No other locality in Canada, and very few in the world have produced as many species. With a current total of 50 type minerals, the quarry has also produced more new species than any other locality in Canada, and accounts for about 25 per cent of all new species discovered in Canada (Horváth 2003). Why has a single a single quarry with a surface area of only 13.5 hectares produced such a mineral diversity? The answer lies in its geology and its multiplicity of mineral environments. INTRODUCTION La carrière Poudrette, localisée dans la suite East Hill du complexe alcalin du Mont Saint-Hilaire, est l’une des localités minéralogiques les plus prolifiques au monde avec plus de 365 espèces identifiées. Nul autre site au Canada, et très peu ailleurs au monde, n’ont livré autant de minéraux différents. Son total de 50 minéraux type à ce jour place non seulement cette carrière au premier rang des sites canadiens pour la découverte de nouvelles espèces, mais représente environ 25% de toutes les nouvelles espèces découvertes au Canada (Horváth 2003).
    [Show full text]
  • Doyleite Al(OH)3 C 2001-2005 Mineral Data Publishing, Version 1
    Doyleite Al(OH)3 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Triclinic. Point Group: 1 (probable) or 1. As rosettes of crystals, to 0.6 mm, tabular on {010}, showing forms {101}, {101}, and less commonly {100} and {001}, rectangular or square in outline; also finely granular and as porcelaneous coatings. Physical Properties: Cleavage: {010}, perfect; {100}, fair. Tenacity: Flexible. Hardness = 2.5–3 D(meas.) = 2.48(1) D(calc.) = 2.482 Optical Properties: Transparent to opaque. Color: Colorless, white, creamy, bluish white. Streak: White. Luster: Vitreous to pearly if colorless; otherwise dull. Optical Class: Biaxial (+). Orientation: X (90◦,41◦); Y (240◦,53◦); Z (343◦,74◦) [with c (0◦,0◦) and b∗ (0◦,90◦) using (φ,ρ)]. Dispersion: r> v,moderately strong. α = 1.545(1) β = 1.553(1) γ = 1.566(1) 2V(meas.) = 77◦ 2V(calc.) = 76.8◦ Cell Data: Space Group: P 1 (probable), or P 1. a = 5.002(1) b = 5.175(1) c = 4.980(2) α =97.50(1)◦ β = 118.60(1)◦ γ = 104.74(1)◦ Z=2 X-ray Powder Pattern: Mont Saint-Hilaire, Canada; minor preferred orientation. 4.794 (100), 2.360 (40), 1.972 (30), 1.857 (30), 1.842 (30), 4.296 (20), 4.182 (20) Chemistry: (1) (2) (3) (4) SiO2 0.03 3.22 Al2O3 65.2 63.7 59.6 65.36 FeO 0.14 0.08 MgO 0.96 CaO 0.48 0.23 Na2O 0.09 0.35 H2O 35.76 35.76 [35.56] 34.64 Total 101.44 99.72 [100.00] 100.00 1− (1) Mont Saint-Hilaire, Canada; H2O by TGA, (OH) confirmed by IR.
    [Show full text]
  • REE-Sr-Ba Minerals from the Khibina Carbonatites, Kola Peninsula, Russia
    Mineralogical Magazine, April 1998, Vol.62(2), pp.225–250 REE-Sr-Bamineralsf romthe Khibina carbonatites,K ola Peninsula,R ussia:t heirmineralogy,paragenesisan devolution ANATOLY N. ZAITSEV Department of Mineralogy, StPetersburg University, StPetersburg 199034, Russia FRANCES WALL Department of Mineralogy, The Natural History Museum, Cromwell Road, London, SW7 5BD AND MICHAEL J. LE BAS Department of Geology, University of Southampton, Southampton Oceanography Centre, Southampton, SO14 3ZH ABSTRACT Carbonatitesfrom the Khibina Alkaline Massif (360 ­ 380Ma), Kola Peninsula, Russia, contain one of themost diverse assemblages of REE mineralsdescribed thus far from carbonatites and provide an excellentopportunity to track the evolution of late-stage carbonatites and their sub-solidus (secondary) changes.Twelverare earth minerals have been analysed in detail and compared with literature analyses.Theseminerals include some common to carbonatites (e .g.Ca-rare-earthfluocarbonates and ancylite-(Ce))plus burbankite and carbocernaite and some very rare Ba, REE fluocarbonates. Overall the REE patternschange from light rare earth-enriched in the earliest carbonatites to heavy rareearth-enriched in the late carbonate-zeolite veins, an evolution which is thought to reflect the increasing ‘carbohydrothermal’ natureof the rock-forming fluid .Manyof the carbonatites have been subjectto sub-solidus metasomatic processes whose products include hexagonal prismatic pseudo- morphsof ancylite-(Ce) or synchysite-(Ce), strontianite and baryte after burbankite and carbocernaite . Themetasomatic processes cause little change in the rare earth patterns and it isthought that they took placesoon after emplacement . KEY WORDS: Khibina,carbonatite, REE,burbankite,carbocernaite, metasomatism . Introduction containhigh levels of Ba and also commonly Sr.Theprincipal RE mineralsin carbonatites are RARE-EARTH-RICH carbonatites,containing wt .
    [Show full text]
  • Download the Scanned
    American Mineralogist, Volume 7l, pages845-847, 1986 NEW MINERAL NAMES'T FnaNx C. H,c,wrHoRNE,PETE J. DuNN, JoBr, D. Gnrco, Jlcnx Puzrnwtczo Jlvrns E. Snrcr,Bv Doyleite* G.Y. Chao, J. Baker, A.P. Sabina,A.C. Roberts (1985) Doyleite, An average of three typical microprobe analyses gave ZnO a new polymorph of Al(OH)r, and its relationship to bayerite, 19.75,CUO 0.02, FerO, 10.81, AlrO3 24.97, AsrO' 31.91, MoO, gibbsite, and nordstrandite. Can. Mineral., 23,21-28. 1.08, HrO (rce) 11.25, sum 99.79 wt0/0,corresponding to (Zno {(AsOJ (OH)r}, or ideally (Zn,Fe)- Doyleite is a new polymorph of AI(OH), that occurs at rrFeo,r)(Al,roFeo ro) | (Al,Fe)r{(AsO.) (OtDr}. Isomorphous replacement of (Zn,Fe) and Mont St. Hilaire and at the Francon quarry, Montreal, | Quebec, (Al,Fe) is indicated. The valence state ofFe is uncertain owing Canada.Wet chemical analysisgave NzO3 65.2,CaO 0.48, HrO to the small amount of pure material available. The mineral is (rcr to ll00'C) 35.76, sum 101.44 wlo/o,corresponding to insoluble in HCl. rce shows a dehydration reaction between 460 AlorrCa"o,(OH)roo.Trace amounts of Na, Fe, Mg, and Si were and 520t with a weight loss of approximately I I wto/o. detected by electron-microprobe analysis. The mineral is not Indexing of the X-ray powder data (Guinier camera) led to a attackedby 1:I HCl, HrSOo,or HNO3 at room temperature.rcA small triclinic cell with lattice constants a : 5.169(5), b : showed a weight loss of 25.630/obetween 280 and 410qCand a 13.038(9),c:4.93r(4) A, a:98.78(7f, B:100.80(6)",r: further gradual loss to I 000€, giving a total weight loss of 35 .
    [Show full text]
  • New Mineral Names*
    AmericanMineralogist, Volume 80, pages 1328-1333,1995 NEW MINERAL NAMES* JonN L. Janson Department of Earth Sciences,University of Waterloo, Waterloo, Ontario N2L 3Gl, Canada J.lcnx Pvztnwtcz Institute of Geological Sciences,University of Wroclaw, Cybulskiego30, 50-205 Wroclaw, Poland ANunnw C. Ronnnrs Geological Survey of Canada, 601 Booth Street,Ottawa, Ontario KlA 0E8, Canada Alarsite* rhtinite, but the synthetic phaseis much higher in Ti and T.F. Semenova,L.P. Vergasova,S.K. Filatov, V.V. An- lacks Fe. anev (1994) Alarsite AlAsOo: A new mineral from vol- Discussion.Known only as a synthetic product; not a canic exhalations.Doklady Akad. Nauk, 338(4),501- valid mineral name. J.L.J. 505 (in Russian). Electron microprobe analysis (averageof 20) gave AlrO. 31.98,FerO, 0.60, CuO 0.54,AsrO, 66.71,sum 99.83 Crawfordite* wt0/0,corresponding to Al, ooFefig,Cufrj,AsonuOo.Occurs as A.P. Khomyakov, L.I. Polezhaeva,E.V. Sokolova(1994) colorlessaggregates with yellowish, pale green,and bluish Crawfordite NarSr(POo)(COr):A new mineral from the tints, commonly containing powdery hematite or tenorite bradleyite group. Zapiski Vseross. Mineral. Obshch., and gaseousinclusions; also as equant grains to 0.3 mm 123(3),4l -49 (in Russian). in diameter, some with poorly developed faces.Vitreous Electron microprobe analysis (averageof two grains) luster, white streak, brittle, no cleavage, VHNro: 449 gaveNarO 31.83,KrO 0.22,CaO 1.45,SrO 27.42,P2O5 (336-480),D-""" : 3.32(l),D*r.: 3.34g,/cm3 for Z : 3. 23.64, CO2(calculatedfrom X-ray structural data) 14.47, Stableat atmospheric conditions; soluble in dilute acids.
    [Show full text]