DOCSLIB.ORG

Volume 73. 1988

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

AmericanMineralogist, Volume 73, pages 1502-1519,1988 INDEX. VOLUME 73. 1988 Abbott, R.N., Jr., C.trrr.Burnham: Polytypism in Bailey, S.Itr., see Peacor, D.R., 876 nicas: A polyhedral approach to energy Baldwj-n, D,K., see Edgar, A.D., 524 calculations, 105 Ba11, D.G.A., see Robin, P.F., 253 Abrecht, J.: Experimental evaluation of the Barton, M., C. Van Gaans: Formation of or- MnC03 + Si02 = I4nSiO3 + C02 equilibrium at 1 thopyroxene - Fe-Ti oxide symplectltes in kbar, 1285 Precambrian intrusives, Rogaland, southwes- Abrecht, J., D.A. Hewitt: Experimental evidence tern Norway, 1046 on the substitution of Ti in bi-otite. 1,275 Batiza, R., see A1lan, J.F., 74I Afifi, A.M., E.J. Essene: MTNFILE: A microcom- Bayliss, P., A.A, Levinson: A system of puter program for storage and manipulation of nomenclature for rare-earth mineral species: chemical data on minerals. 446 Revision and extension. 422 Ahn, J.H., D.M. Burt, P.R. Buseck: Alteration of Belkin, H.E., G. Cavarretta, B. De Vivo, F, andalusite to sheet silicates in a Tecce: Hydrothermal phlogopite and anhydrite pegmatite, 559 from the SH2 we11, Sabatini volcanic dis- Aizenshtat, 2,, see He11er-Kal1ai, L., 376 trict, Latj,um, Italy: Fluld inclusions and Akizuki, M., K. Harada: Symmetry, twinning, and nlneral chemistry, 775 para11e1 growth of scolecite, mesolite, and Be11, D.R., see Edgar, A.D., 524 natroli-te, 613 Bernstein, L.R., see Ross, C.R,, ff, 657 Akizukl, M., H. Nishido: Epistilbite: Symrnetry Bethke, C.M., see Altaner, S.P., 766 and twinning, 1434 Bethke, P.M., see Altaner, S.P., 145 A11an, J.F., R.0. Sack, R. Batiza: Cr-rich Bettison, L.A., P. Schiffman: Conpositional and spinels as petrogenetic j-ndicators: MORB-type structural varlations of phyllosili.cates frorn lavas from the Lamont seamount chain. eastern the Point Sa1 ophiolite, California, 62 Pacifi.c, 74I Bhattacharya, A., A.C. Mazumdar, S.K. Sen: Fe-Mg Al1en, F.M., P.R. Buseck: XRD, FTIR, and TEM mixing ln cordierite: Constraints fron studies of optically anisotropic grossular natural data and implications for cordierite- oarnat< S6R garnet geotherrnometry in granulites, 338 Altaner, S.P., C.M. Bethke: Interlayer order in Bhattacharya, R.N., see Ganguly, J., 901 i11ite/snecrite, 766 Bianchi, R., T. Pilati, V. Die11a, C.M. Gramac- Altaner, S.P., N. Vergo: Sericite from the clo1i., G. lvla.nnucci: A re-examinatlon of Silverton caldera, Colorado: Discussion, thortveitite, 601 L472 Bish, 0.L., see Post, J.E., 861 Altaner, S.P., J,J. Fitzpatrick, M.D. Krohn, Bish, D.L., see Veblen, D.R., 677 P.M. Bethke, D.0. Hayba, J.A. Goss, Z.A. B1adh, K.W., see Jambor, J.L., 927 Brown: Amrnonlurnin alunites, 1,45 B1oss, F.D,: Presentatj,on of the Roebling Medal Andersen, D.J., D.H. Lindsley: Internally con- of the Mineralogical Society of America for sistent solution models for Fe-Mg-l4n-Ti 1987 to Gerald V. Gibbs, 668 oxldes: Fe-Ti oxides, 7L4 B1oss, F.D.: Memorial of D. Jerome Fisher, 925 Andersen,D.J., see Frost, B.R., 727 B1oss, F.D., see Gunter, M.E., 1481 Angel, R.J.: High-pressure structure of Boak, J.L., see Dynek, R.F., 547 anorthite, 1114 Boggs, R.C. : Calciohilairite: CaZrSi3Og.3H2O, Anovitz, L.M., E.J. Essene, lrl.R. Durham:Order- the calcium analogue of hilairite from the disorder experiments on orthopyroxenes: Golden Horn batholith, northern Cascades, Implications for the orthopyroxene Washington, 1191 geospeedometer, 1060 Boland, J.N., see Konings, R.J.M. , 754 Appleman,D.E., see Post, J.E., 1401 BoulEgue, J., see Stouff, P., 1162 Arima, M., see Edgar, A.D., 524 Bowles, J.F.W.: Definition and range of composl- Armbruster, T., R. Oberh2insli: Crystal chemistry tion of naturally occurring ninerals with the of double-ring silicates: Structural, chemi- pseudobrookite structure, 1377 cal, and optical variation in osumilites, Brothers, S.C., see Dymek, R.F., 547 585 Brown, 2.A., see Altaner, S.P., 745 Armbruster, T., R. Oberhdnsli: Crystal chemj-stry Bryndzia, L.T., O.J. Kleppa: High-temperature of double-ring silicates: Structures of reaction calorimetry of solid and liquld sugilite and brannockite, 595 phases in part of the quasi-binary system Aurisicchio, C., G. Fioravanti, 0. Grubessi, Cu2S-Sb253,707 P.F. Zanazzi: Reappralsal of the crystal Burke, E.A.J., see Hawthorne,F.C., 189 chemistry of beryl, 826 Burke, E.A.J., see Jambor, J.L., 1492 Burnham,C.W., see Abbott, R.N,, Jr., 105 Bacon, C.R., M.M. Hirschmann: Mg/l4n partitioning Burnham,C.l.rl., see Pj-nckney,L.R., 798, 809 as a test for equili-brium between coexisting Burt, D.M.: Planet Alsioff: A problern set for Ie-I1 oxades. )/ students of phase equilibrla or metarnorphic Bailey, S.W., see MacKinney, J.A., 365 petrology, 936 0003-o04x/88 / | | 12-r 502s02.00 r502 AUTHOR INDEX, VOLUME 73, I988 1503 Burt, D.M.: Planet Alsioff: Solutions to Craig, J.R., see Johnson, N.E.' 389 problems posed in the previous issue, 1201 Criddle, A.J., see Dunn, P.J., 4O5, 4I3 Burt, D.M,: Stability of genLhelviLe, Criddle, A.J., see Rouse, R.C., 643 Zn4(BeSi04)35: An exercise in chalcophilicity using exchange operators, 1384 Daddar, R., see King, R.trrr., 424 Burt, D.M., see Ahn, J.H., 559 Davidson, P.M., D.H. Lindsley, [,'l.D.Carlson: Burt, D,M., see Kortemeier, W.T., 507 Thermochemlstry of pyroxenes on the ioin Burton, B.P., P.M. Davidson: Order-disorder in Mg2Si206-CaMgSi206: A revision of the modef ornphacitic pyroxenes: A model for coupled fnr nressrrres rrn to 30 kbar, 1264 substitutlon in the point approximation-- Davidson, P.M., see Burton, B.P., 916 Reply, 916 de Camargo, M.B., S' Isotanl: Optical absorption Buseck, P.R., see Ahn, J.H., 559 spectroscopy of natural and lrradiated pink Buseck, P.R., see A11en, F.M., 568 tourmaline, I72 Buseck, P.R., see Hassan, I., 119 de Gennaro, M., see Franco, E., 420 Buseck, P.R., see Sharp, T.G., 1292 DePaolo, D.J.: Acceptance of the Mineralogical Society of America Award for 1987, 674 Campana, C.F., see Hughes, J.M., 181 De Vivo, 8., see Belkin, H.E., 775 Cannl11o, E., F. lLazzi, G. Rossi: Crystal struc- Die11a, V., see Bianchi, R', 601 ture of andremeyerite: BaFe(Fe,Mn,Mg)Si207, Drexler, J.W., see Hughes, J.M., 181 608 Duesler, E.N., B.C. Chakoumakos,E.E. Foord: Carlson, hl.D.: Subsolidus phase equilibria on Zirnbabweite, Na(Pb, Na, K) 2As4(Ta, Nb, Ti ) a0te' the forsterite-saturated join Mg2Si206- an arsenite-tantalate with a novel corner- CaMgSi206 at atmospheric pressure, 232 linked octahedral sheet, 1186 Carlson, W.D., D.H. Lindsley: Thermochernistry of Dunn, P.J.: Protocols for scientists on the pyroxenes on the join Mg2Si206-Cal4gSi2O6, 242 deposition of investlgated rnineral Carlson, lrl.D., G.R. Rossman: Vanadium- and specimens, 1480 chromium-bearing andalusite: Occurrence and Dunn, P.J., D.R. Peacor, A.J. Criddle' C.J. optical-absorpti-on spectroscopy, 1366 Stanley: fngersonite, a new calcium-manganese Carlson, I4r.D., J.S. Swinnea, D.E. Miser: antimonate related to pyrochlore, fron'' Stability of orthoenstatite at high tempera- LSngban, Sweden, 405 ture and 1ow pressure, 1255 Dunn, P.J., D.R. Peacor, A.J. Criddlet C.J. Carlson, W.D., see Davldson, P.M., 1264 Stanley: Filipstadite, a new I'4n-FeJ+-Sb Carmichael, f., see Kress, V.C., 1267 derivative of spinel, from L8ngban, Sweden, Carpenter, P,K., see Llilliams, L.B., 1457 4r3 Carro11, M.R., M.J. Rutherford: Sulfur specia- Dunn, P.J., J.D. Grice, F.J. Wicks' R.A. Gault: tion i.n hydrous experimental glasses of Paulkellerite, a new bismuth iron phosphate varying oxldatj-on state: Results from mineral from Schneeberg, Gerrnany, 870 measured wavelength shifts of sulfur X-rays, Dunn, P.J., J.D. Grj-ce, W.C. Metropolis: 845 Zodacite, the Mn analogue of nontgomeryite' Cattl, M., G. Ferraris, G. Ivaldi: Thermal from Mangualde, Portugal, II79 behavior of the crystal structure of stron- Dunn, P.J., C.A. Francis, J' Innes: A tian piemontite, 1370 rncgovernite-1i.ke mineral and leucophoeniclte Catti, M., see Ivaldi, G., 358 from the Kombat mine, Namibia, 1182 Cavarretta, G., see Belkin, H.E., 775 Dunn, P.J., see Peacor, D.R.' 632' 838' 888 Chakoumakos, 8.C., see Duesler, E.N.., 1186 Dunn. P.J., see Rouse, R.C., 643 Chakoumakos, B.C., see Lumpkin, G.R., 1405 Durham, W.R., see Anovitz, L.M., 1060 Chakraborty, S., see Ganguly, J., 901 Dutrow, B.L,, see Holdaway, M'J.' 20 Chappe11, B.W., see lalhalen, J.B., 28I Dyar, M.D., M.T.^Naney: Effects of quench Christy, A.G.: A new ?c superstructure in beryl- methods on FeJ+/Fez+ ratios: Reply, 1479 lian sapphirine from Casey Bay, Enderby Land, Dymek, R.F., J.L. Boak, S.C. Brothers: Titanian Antarctica, 1134 chondrodite- and titanian clinohumite-bearing Chu, H., see Shen, P., 383 metadunite from the 3800 Ma Isua supracrustal C1owe, C.A,, R.K. Popp, S.J. Fritz: Experimental belt, lJest Greenland: Chemistry, petrology, investigation of the effect of oxygen and origin, 547 fugacity on ferric-ferrous ratios and unit- ce11 parameters of four natural Eberl, D.D., J. Srodof: Ostwald ripening and clinoamphiboles, 487 interparticle-diffraction effects for i11ite C1owe, C.A., see Phi11ips, M.W., 500 crystals, 1315 Cohen, R.E.: Order-disorder in omphacitic Eber1, D.D., J. Srodof,, M. Lee, P.H. Nadeau: pyroxenes: A model for coupled substltution Sericite from the Silverton caldera, j-n the point approximation--Discussion, 910 Colorado: Reply, I475 Co11yer, S., N.W.
Recommended publications
  • The Regional Distribution of Zeolites in the Basalts of the Faroe Islands and the Significance of Zeolites As Palaeo- Temperature Indicators

    The Regional Distribution of Zeolites in the Basalts of the Faroe Islands and the Significance of Zeolites As Palaeo- Temperature Indicators

    The regional distribution of zeolites in the basalts of the Faroe Islands and the significance of zeolites as palaeo- temperature indicators Ole Jørgensen The first maps of the regional distribution of zeolites in the Palaeogene basalt plateau of the Faroe Islands are presented. The zeolite zones (thomsonite-chabazite, analcite, mesolite, stilbite-heulandite, laumontite) continue below sea level and reach a depth of 2200 m in the Lopra-1/1A well. Below this level, a high temperature zone occurs characterised by prehnite and pumpellyite. The stilbite-heulan- dite zone is the dominant mineral zone on the northern island, Vágar, the analcite and mesolite zones are the dominant ones on the southern islands of Sandoy and Suðuroy and the thomsonite-chabazite zone is dominant on the two northeastern islands of Viðoy and Borðoy. It is estimated that zeolitisa- tion of the basalts took place at temperatures between about 40°C and 230°C. Palaeogeothermal gradients are estimated to have been 66 ± 9°C/km in the lower basalt formation of the Lopra area of Suðuroy, the southernmost island, 63 ± 8°C/km in the middle basalt formation on the northernmost island of Vágar and 56 ± 7°C/km in the upper basalt formation on the central island of Sandoy. A linear extrapolation of the gradient from the Lopra area places the palaeosurface of the basalt plateau near to the top of the lower basalt formation. On Vágar, the palaeosurface was somewhere between 1700 m and 2020 m above the lower formation while the palaeosurface on Sandoy was between 1550 m and 1924 m above the base of the upper formation.
  • Xrd and Tem Studies on Nanophase Manganese

    Xrd and Tem Studies on Nanophase Manganese

    Clays and Clay Minerals, Vol. 64, No. 5, 488–501, 2016. 1 1 2 2 3 XRD AND TEM STUDIES ON NANOPHASE MANGANESE OXIDES IN 3 4 FRESHWATER FERROMANGANESE NODULES FROM GREEN BAY, 4 5 5 6 LAKE MICHIGAN 6 7 7 8 8 S EUNGYEOL L EE AND H UIFANG X U* 9 9 NASA Astrobiology Institute, Department of Geoscience, University of Wisconsin Madison, Madison, 10 À 10 1215 West Dayton Street, A352 Weeks Hall, Wisconsin 53706 11 11 12 12 13 Abstract—Freshwater ferromanganese nodules (FFN) from Green Bay, Lake Michigan have been 13 14 investigated by X-ray powder diffraction (XRD), micro X-ray fluorescence (XRF), scanning electron 14 microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and scanning 15 transmission electron microscopy (STEM). The samples can be divided into three types: Mn-rich 15 16 nodules, Fe-Mn nodules, and Fe-rich nodules. The manganese-bearing phases are todorokite, birnessite, 16 17 and buserite. The iron-bearing phases are feroxyhyte, goethite, 2-line ferrihydrite, and proto-goethite 17 18 (intermediate phase between feroxyhyte and goethite). The XRD patterns from a nodule cross section 18 19 suggest the transformation of birnessite to todorokite. The TEM-EDS spectra show that todorokite is 19 associated with Ba, Co, Ni, and Zn; birnessite is associated with Ca and Na; and buserite is associated with 20 2+ +2 3+ 20 Ca. The todorokite has an average chemical formula of Ba0.28(Zn0.14Co0.05 21 2+ 4+ 3+ 3+ 3+ 2+ 21 Ni0.02)(Mn4.99Mn0.82Fe0.12Co0.05Ni0.02)O12·nH2O.
  • Metamorphism of Sedimentary Manganese Deposits

    Metamorphism of Sedimentary Manganese Deposits

    Acta Mineralogica-Petrographica, Szeged, XX/2, 325—336, 1972. METAMORPHISM OF SEDIMENTARY MANGANESE DEPOSITS SUPRIYA ROY ABSTRACT: Metamorphosed sedimentary deposits of manganese occur extensively in India, Brazil, U. S. A., Australia, New Zealand, U. S. S. R., West and South West Africa, Madagascar and Japan. Different mineral-assemblages have been recorded from these deposits which may be classi- fied into oxide, carbonate, silicate and silicate-carbonate formations. The oxide formations are represented by lower oxides (braunite, bixbyite, hollandite, hausmannite, jacobsite, vredenburgite •etc.), the carbonate formations by rhodochrosite, kutnahorite, manganoan calcite etc., the silicate formations by spessartite, rhodonite, manganiferous amphiboles and pyroxenes, manganophyllite, piedmontite etc. and the silicate-carbonate formations by rhodochrosite, rhodonite, tephroite, spessartite etc. Pétrographie and phase-equilibia data indicate that the original bulk composition in the sediments, the reactions during metamorphism (contact and regional and the variations and effect of 02, C02, etc. with rise of temperature, control the mineralogy of the metamorphosed manga- nese formations. The general trend of formation and transformation of mineral phases in oxide, carbonate, silicate and silicate-carbonate formations during regional and contact metamorphism has, thus, been established. Sedimentary manganese formations, later modified by regional or contact metamorphism, have been reported from different parts of the world. The most important among such deposits occur in India, Brazil, U.S.A., U.S.S.R., Ghana, South and South West Africa, Madagascar, Australia, New Zealand, Great Britain, Japan etc. An attempt will be made to summarize the pertinent data on these metamorphosed sedimentary formations so as to establish the role of original bulk composition of the sediments, transformation and reaction of phases at ele- vated temperature and varying oxygen and carbon dioxide fugacities in determin- ing the mineral assemblages in these deposits.
  • Uhm Phd 9230509 R.Pdf

    Uhm Phd 9230509 R.Pdf

    INFORMATION TO USERS This manuscript has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand corner and continuing from left to right in equal sections with small overlaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book. Photographs included in the original manuscript have been reproduced xerographically in this copy. Higher quality 6" x 9" black and white photographic prints are available for any photographs or illustrations appearing in this copy for an additional charge. Contact UMI directly to order. U·M·I University Microfilms International A Bell & Howetl truorrnanoo Company 300 North Zeeb Road. Ann Arbor. M148106-1346 USA 313,761-4700 800 521-0600 Order Number 9230509 Mid-ocean ridge magmatism: Style of mantle upwelling, partial melting, crustal level processes, and spreading rate dependence. A petrologic approach Niu, Yaoling, Ph.D.
  • C:\Documents and Settings\Alan Smithee\My Documents\MOTM

    C:\Documents and Settings\Alan Smithee\My Documents\MOTM

    I`mt`qx1/00Lhmdq`knesgdLnmsg9Rbnkdbhsd This month’s mineral, scolecite, is an uncommon zeolite from India. Our write-up explains its origin as a secondary mineral in volcanic host rocks, the difficulty of collecting this fragile mineral, the unusual properties of the zeolite-group minerals, and why mineralogists recently revised the system of zeolite classification and nomenclature. OVERVIEW PHYSICAL PROPERTIES Chemistry: Ca(Al2Si3O10)A3H2O Hydrous Calcium Aluminum Silicate (Hydrous Calcium Aluminosilicate), usually containing some potassium and sodium. Class: Silicates Subclass: Tectosilicates Group: Zeolites Crystal System: Monoclinic Crystal Habits: Usually as radiating sprays or clusters of thin, acicular crystals or Hairlike fibers; crystals are often flattened with tetragonal cross sections, lengthwise striations, and slanted terminations; also massive and fibrous. Twinning common. Color: Usually colorless, white, gray; rarely brown, pink, or yellow. Luster: Vitreous to silky Transparency: Transparent to translucent Streak: White Cleavage: Perfect in one direction Fracture: Uneven, brittle Hardness: 5.0-5.5 Specific Gravity: 2.16-2.40 (average 2.25) Figure 1. Scolecite. Luminescence: Often fluoresces yellow or brown in ultraviolet light. Refractive Index: 1.507-1.521 Distinctive Features and Tests: Best field-identification marks are acicular crystal habit; vitreous-to-silky luster; very low density; and association with other zeolite-group minerals, especially the closely- related minerals natrolite [Na2(Al2Si3O10)A2H2O] and mesolite [Na2Ca2(Al6Si9O30)A8H2O]. Laboratory tests are often needed to distinguish scolecite from other zeolite minerals. Dana Classification Number: 77.1.5.5 NAME The name “scolecite,” pronounced SKO-leh-site, is derived from the German Skolezit, which comes from the Greek sklx, meaning “worm,” an allusion to the tendency of its acicular crystals to curl when heated and dehydrated.
  • Mineral Processing

    Mineral Processing

    Mineral Processing Foundations of theory and practice of minerallurgy 1st English edition JAN DRZYMALA, C. Eng., Ph.D., D.Sc. Member of the Polish Mineral Processing Society Wroclaw University of Technology 2007 Translation: J. Drzymala, A. Swatek Reviewer: A. Luszczkiewicz Published as supplied by the author ©Copyright by Jan Drzymala, Wroclaw 2007 Computer typesetting: Danuta Szyszka Cover design: Danuta Szyszka Cover photo: Sebastian Bożek Oficyna Wydawnicza Politechniki Wrocławskiej Wybrzeze Wyspianskiego 27 50-370 Wroclaw Any part of this publication can be used in any form by any means provided that the usage is acknowledged by the citation: Drzymala, J., Mineral Processing, Foundations of theory and practice of minerallurgy, Oficyna Wydawnicza PWr., 2007, www.ig.pwr.wroc.pl/minproc ISBN 978-83-7493-362-9 Contents Introduction ....................................................................................................................9 Part I Introduction to mineral processing .....................................................................13 1. From the Big Bang to mineral processing................................................................14 1.1. The formation of matter ...................................................................................14 1.2. Elementary particles.........................................................................................16 1.3. Molecules .........................................................................................................18 1.4. Solids................................................................................................................19
  • Studies of the Zeolites Composition of Zeolites of the Natrolite Group and Compositional Relations Among Thomsonites Gonnardites, and Natrolites

    Studies of the Zeolites Composition of Zeolites of the Natrolite Group and Compositional Relations Among Thomsonites Gonnardites, and Natrolites

    r-'1 ~ Q I ~ c lt') ~ r-'1 'JJ ~ Q.) < ~ ~ ......-~ ..,.;;j ~ <z 0 0 Q.) 1-4 rJ:J rJ:J N r-'1 ~ Q.) 0 ~ ..c ~ ~ ~ I r-'1 ~ > ~ 0 I ~ rJ:J 'JJ ..,.;;j Q.) < .....-~ 0 . 1-4 ~ C"-' 0 ~ ..,.;;j ~ 0 r-'1 00 C"-' Foster-STUDIES•. OF THE ZEOLITES-Geological Survey Professional Paper 504-D, E Studies of the Zeolites Composition of Zeolites of the Natrolite Group and Compositional Relations among Thomsonites Gonnardites, and Natrolites By MARGARET D. FOSTER SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY GEOLOGICAL SURVEY PROFESSIONAL PAPER 504-D, E UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1965 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretory GEOLOGICAL SURVEY Thomas B. Nolan, Director The U.S. Geological Survey Library has cataloged this publication as follows: Foster, Margaret Dorothy, 1895- Studies of the zeolites. D. Composition of zeolites of the natrolite group. E. Compositional relations among thom­ sonites, gonnardites, and natrolites. Washington, U.S. Govt. Print. Off., 1965. v, 7; iii, 10 p. diagrs., tables. 30 em. (U.S. Geological Survey. Professional paper 504-D, E) Shorter contributions to general geology. Each part also has separate title page. Includes bibliographies. (Continued on next card) Foster, Margaret Dorothy, 1895- Studies of the zeolites. 1965. (Card 2) 1. Zeolites. I. Title. II. Title: Composition of zeolites of the natro­ lite group. III. Title: Compositional relations among thomsonites, gonnardites, and natrolites. (Series) For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price 25 cents (paper cover) Studies of the Zeolites Composition of Zeolites of the N atrolite Group By MARGARET D.
  • Cr-Rich Spinels As Petrogenetic Indicators

    Cr-Rich Spinels As Petrogenetic Indicators

    American Mineralogist, Volume 73, pages 741-753, 1988 Cr-rich spinels as petrogeneticindicators: MORB-type lavas from the Lamont seamountchain, easternPacific J,trrns F. Ar.r-.c.N* Department of Geological Sciences,Northwestern University, Evanston, Illinois 60201, U.S.A. Rrcn.qno O. Sacr Department of Earth and Atmospheric Sciences,Purdue University, West Lafayette, Indiana 47907, U.S.A. Roonv Bxttzt Department of Geological Sciences,Northwestern University, Evanston, Illinois 60201, U.S.A. Ansrucr The composition and morphology of Cr-rich spinels in MORBs reflect and record pre- eruptive petrogeneticevents such as magma-chamberrecharge, fractionation, and magma mixing. In this paper we examine Cr-rich spinels in MORB-type lavas erupted from the near-ridge Lamont seamountsand from the adjacent East Pacific Rise crest at 10'N. The spinels studied are exclusively from quickly quenchedglassy to spherulitic flow margins. The host lavas are depleted [(LalSm)" < 0.57] and relatively primitive [Me/(Me + Fe2*) to 0.71, Cr to 460 ppml, with the most primitive samplesapproaching the composition of liquids in equilibrium with mantle peridotite. The spinelscover a wide range in Al and Cr contents,with spinel Cr/(Cr + Al) ranging from 0.20 to 0.54 for the entire suite. As in other depleted MORBs, TiO, and calculated FerO. contents in the spinels are low (0. 16- 0.85 and 5.5-9.2 wto/0,respectively). Contents of Al, Mg, and Fe of groundmassspinels strongly correlate with host-glasscomposition, but spinel Cr content shows little correla- tion with host-glassCr content. Castingof spinel compositions in terms of Mg-Fe'z*spinel- host liquid exchangeequilibria and in terms of the compositionally related crystallochem- ical effectson this exchangeshows that for a given lava suite derived from similar parental lavas, spinel Crl(Cr + Al) increasesand Mg/@g + Fe2+)decreases with the amount of Fe enrichment, Al depletion, and extent of fractionation [as representedby the normative ratio Diop/(Ol + Diop)l of the liquids in which they equilibrated.
  • Sugilite in Manganese Silicate Rocks from the Hoskins Mine and Woods Mine, New South Wales, Australia

    Sugilite in Manganese Silicate Rocks from the Hoskins Mine and Woods Mine, New South Wales, Australia

    Sugilite in manganese silicate rocks from the Hoskins mine and Woods mine, New South Wales, Australia Y. KAWACHI Geology Department, University of Otago, P.O.Box 56, Dunedin, New Zealand P. M. ASHLEY Department of Geology and Geophysics, University of New England, Armidale, NSW 2351, Australia D. VINCE 1A Ramsay Street, Essendon, Victoria 3040, Australia AND M. GOODWIN P.O.Bo• 314, Lightning Ridge, NSW 2834, Australia Abstract Sugilite relatively rich in manganese has been found at two new localities, the Hoskins and Woods mines in New South Wales, Australia. The occurrences are in manganese-rich silicate rocks of middle to upper greenschist facies (Hoskins mine) and hornblende hornfels facies (Woods mine). Coexisting minerals are members of the namansilite-aegirine and pectolite-serandite series, Mn-rich alkali amphiboles, alkali feldspar, braunite, rhodonite, tephroite, albite, microcline, norrishite, witherite, manganoan calcite, quartz, and several unidentified minerals. Woods mine sugilite is colour-zoned with pale mauve cores and colourless rims, whereas Hoskins mine sugilite is only weakly colour-zoned and pink to mauve. Within single samples, the chemical compositions of sugilite from both localities show wide ranges in A1 contents and less variable ranges of Fe and Mn, similar to trends in sugilite from other localities. The refractive indices and cell dimensions tend to show systematic increases progressing from Al-rich to Fe- Mn-rich. The formation of the sugilite is controlled by the high alkali (especially Li) and manganese contents of the country rock, reflected in the occurrences of coexisting high alkali- and manganese- bearing minerals, and by high fo2 conditions. KEYWORDS: sugilite, manganese silicate rocks, milarite group, New South Wales, Australia Introduction Na2K(Fe 3 +,Mn 3 +,Al)2Li3Sit2030.
  • The Geology of Manganese Nodules

    The Geology of Manganese Nodules

    1.0 The Geology of Manganese Nodules James R. Hein1 and Sven Petersen2 1 U.S. Geological Survey, 400 Natural Bridges Dr., Santa Cruz, CA, 95060, USA 2 Helmholtz Centre for Ocean Research Kiel (GEOMAR), 24148 Kiel, Germany MANGANESE NODULES 7 1.1 The formation and occurrence of manganese nodules Manganese nodules are mineral concretions made up of manga- • diagenetically, in which minerals precipitate from sedi- nese and iron oxides. They can be as small as golf balls or as big ment pore waters – that is, seawater that has been modi- as large potatoes. The nodules occur over extensive areas of the fied by chemical reactions within the sediment. vast, sediment-covered, abyssal plains of the global ocean in water depths of 4 000 to 6 500 metres, where temperatures are just above The metal oxides that make up the precipitate attach to a freezing, pressures are high, and no sunlight reaches (Figure 2). nucleus – perhaps something as small and common as a bit of shell or a shark’s tooth – and very slowly build up around The manganese and iron minerals in these concretions precipi- the nucleus in layers. Their mineralogy is simple: vernadite tate (form a solid) from the ambient, or surrounding, water in two (a form of manganese oxide) precipitates from seawater; ways (Figure 3): todorokite (another manganese oxide) precipitates from pore • hydrogenetically, in which the minerals precipitate from cold waters; and birnessite (a third manganese oxide) forms from ambient seawater; and the todorokite. Depth region of potential nodule development Exclusive economic zone Seabed from 0 to 2 000 metres depth Seabed from 4 000 to 6 500 metres depth - the abyssal depth at which nodules are generally formed Land area Seabed from 2 000 to 4 000 metres depth Seabed below 6 500 metres depth Figure 2.
  • Infrared and Raman Spectroscopic Characterization of the Carbonate Bear- Ing Silicate Mineral Aerinite - Implications for the Molecular Structure

    Infrared and Raman Spectroscopic Characterization of the Carbonate Bear- Ing Silicate Mineral Aerinite - Implications for the Molecular Structure

    This may be the author’s version of a work that was submitted/accepted for publication in the following source: Frost, Ray, Scholz, Ricardo, & Lopez Toro, Andres (2015) Infrared and Raman spectroscopic characterization of the carbonate bear- ing silicate mineral aerinite - Implications for the molecular structure. Journal of Molecular Structure, 1097, pp. 1-5. This file was downloaded from: https://eprints.qut.edu.au/84503/ c Consult author(s) regarding copyright matters This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the docu- ment is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recog- nise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to [email protected] License: Creative Commons: Attribution-Noncommercial-No Derivative Works 2.5 Notice: Please note that this document may not be the Version of Record (i.e. published version) of the work. Author manuscript versions (as Sub- mitted for peer review or as Accepted for publication after peer review) can be identified by an absence of publisher branding and/or typeset appear- ance. If there is any doubt, please refer to the published source. https://doi.org/10.1016/j.molstruc.2015.05.008 Infrared and Raman spectroscopic characterization of the carbonate bearing silicate mineral aerinite – implications for the molecular structure Ray L.
  • New Minerals Approved Bythe Ima Commission on New

    New Minerals Approved Bythe Ima Commission on New

    NEW MINERALS APPROVED BY THE IMA COMMISSION ON NEW MINERALS AND MINERAL NAMES ALLABOGDANITE, (Fe,Ni)l Allabogdanite, a mineral dimorphous with barringerite, was discovered in the Onello iron meteorite (Ni-rich ataxite) found in 1997 in the alluvium of the Bol'shoy Dolguchan River, a tributary of the Onello River, Aldan River basin, South Yakutia (Republic of Sakha- Yakutia), Russia. The mineral occurs as light straw-yellow, with strong metallic luster, lamellar crystals up to 0.0 I x 0.1 x 0.4 rnrn, typically twinned, in plessite. Associated minerals are nickel phosphide, schreibersite, awaruite and graphite (Britvin e.a., 2002b). Name: in honour of Alia Nikolaevna BOG DAN OVA (1947-2004), Russian crys- tallographer, for her contribution to the study of new minerals; Geological Institute of Kola Science Center of Russian Academy of Sciences, Apatity. fMA No.: 2000-038. TS: PU 1/18632. ALLOCHALCOSELITE, Cu+Cu~+PbOZ(Se03)P5 Allochalcoselite was found in the fumarole products of the Second cinder cone, Northern Breakthrought of the Tolbachik Main Fracture Eruption (1975-1976), Tolbachik Volcano, Kamchatka, Russia. It occurs as transparent dark brown pris- matic crystals up to 0.1 mm long. Associated minerals are cotunnite, sofiite, ilin- skite, georgbokiite and burn site (Vergasova e.a., 2005). Name: for the chemical composition: presence of selenium and different oxidation states of copper, from the Greek aA.Ao~(different) and xaAxo~ (copper). fMA No.: 2004-025. TS: no reliable information. ALSAKHAROVITE-Zn, NaSrKZn(Ti,Nb)JSi401ZJz(0,OH)4·7HzO photo 1 Labuntsovite group Alsakharovite-Zn was discovered in the Pegmatite #45, Lepkhe-Nel'm MI.