The International Mineralogical Association's approved amphibole nomenclature has been revised to simplify it, make it more consistent with divisions generally at 50%, define prefixes and modifiers more precisely, and include new amphibole species discovered and named since 1978, when the previous scheme was approved. The same reference axes form the basis of the new scheme and most names are little changed, but compound species names like tremolitic hornblende (now magnesiohornblende) are abolished, as are crossite (now glaucophane or ferroglaucophane or magnesioriebeckite or riebeckite), tirodite (now manganocummingtonite), and dannemorite (now manganogrunerite). The 50% rule has been broken only to retain tremolite and actinolite as in the 1978 scheme; the sodic-calcic amphibole range has therefore been expanded. Alkali amphiboles are now sodic amphiboles. The use of hyphens is defined. New amphibole names approved since 1978 include nyboite, leakeite, kornite, ungarettiite, sadanagaite, and cannilloite. All abandoned names are listed. The formulae and source of the amphibole end-member names are listed and procedures outlined to calculate Fe (super 3+) and Fe (super 2+) where not determined by analysis.

Nomenclature of amphiboles Report of the Subcommittee on Amphiboles of the International Mineralogical Association Commission on New Minerals and Mineral Names;Nomenclature of amphiboles Report of the Subcommittee on Amphiboles of the International Mineralogical Association Commission on New Minerals and Mineral Names

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Nomenclature of amphiboles; report of the subcommittee on amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names

Naming materials in the magma/igneous rock system

The graywackes of Paleozoic turbidite sequences of eastern Australia show a large variation in their trace element characteristics, which reflect distinct provenance types and tectonic settings for various suites. The tectonic settings recognised are oceanic island arc, continental island arc, active continental margin, and passive margins. Immobile trace elements, e.g. La, Ce, Nd, Th, Zr, Nb, Y, Sc and Co are very useful in tectonic setting discrimination. In general, there is a systematic increase in light rare earth elements (La, Ce, Nd), Th, Nb and the Ba/Sr, Rb/Sr, La/Y and Ni/Co ratios and a decrease in V, Sc and the Ba/Rb, K/Th and K/U ratios in graywackes from oceanic island arc to continental island arc to active continental margin to passive margin settings. On the basis of graywacke geochemistry, the optimum discrimination of the tectonic settings of sedimentary basins is achieved by La-Th, La-Th-Sc, Ti/Zr-La/Sc, La/Y-Sc/Cr, Th-Sc-Zr/10 and Th-Co-Zr/10 plots. The analysed oceanic island arc graywackes are characterised by extremely low abundances of La, Th, U, Zr, Nb; low Th/U and high La/Sc, La/Th, Ti/Zr, Zr/Th ratios. The studied graywackes of the continental island arc type setting are characterised by increased abundances of La, Th, U, Zr and Nb, and can be identified by the La-Th-Sc and La/Sc versus Ti/Zr plots. Active continental margin and passive margin graywackes are discriminated by the Th-Sc-Zr/10 and Th-Co-Zr/10 plots and associated parameters (e.g. Th/Zr, Th/Sc). The most important characteristic of the analysed passive margin type graywackes is the increased abundance of Zr, high Zr/Th and lower Ba, Rb, Sr and Ti/Zr ratio compared to the active continental margin graywackes.

Trace element characteristics of graywackes and tectonic setting discrimination of sedimentary basins

This is the final report on the nomenclature of pyroxenes by the Subcommittee on Pyroxenes established by the Commission on New Minerals and Mineral Names of the International Mineralogical Association. The recommendations of the Subcommittee as put forward in this report have been formally accepted by the Commission. Accepted and widely used names have been chemically defined, by combining new and conventional methods, to agree as far as possible with the consensus of present use. Twenty names are formally accepted, among which thirteen are used to represent the end-members of definite chemical compositions. In common binary solid-solution series, species names are given to the two end-members by the “50% rule”. Adjectival modifiers for pyroxene mineral names are defined to indicate unusual amounts of chemical constituents. This report includes a list of 105 previously used pyroxene names that have been formally discarded by the Commission.

Nomenclature of Pyroxenes

PART 1 ORTHO: Di- and ring silicates: olivine group humite group zircon sphene (titanite) garnet group, vesuvianite sillimanite, mullite, andalusite, kyanite topaz staurolite, chloritoid epidote group lawsonite, pumpellyite melilite group beryl, cordierite, tourmaline axinite. PART 2 CHAIN SILICATES: pyroxene group wollastonite sapphirine amphibole group. PART 3 SHEET SILICATES: mica group stilpnomelane pyrophyllite chlorite serpentine clay minerals apophyllite prehnite. PART 4 FRAMEWORK SILICATES: feldspar group silica minerals nepheline group petalite, leucite sodalite group cancrinite - vishnevite, scapolite analcite, zeolite group. PART 5 NON-SILICATES: oxides hydroxides sulphides sulphates carbonates phosphates halides

An Introduction to the Rock-Forming Minerals

Rock-forming minerals

Ce livre d'une 6quipe de onze auteurs d6crit les m6thodes modernes physiques de s6paration et de d6termination des diff6rents constituants des mat6riaux /~ l'6tat solide; s'il int6resse, au premier chef, les min6ralogistes et les p6trographes, il sera consult6, avec autant de profit par tous ceux qui 6tudient des mat6riaux complexes, alliages m6talliques, c6ramiques, r6fractaires, ciments, verres. Les 13 chapitres de ce livre d6crivent les techniques du traitement du mat6riau et des mesures sans trop insister sur leur aspect th6orique. Le chapitre 1 par L.D. Muller concerne la s6paration des diff6rentes phases; le chapitre 2 par J.D.Muir, les techniques du microscope polarisant pour les substances transparentes; le chapitre 3 par S. H. U. Bowie, les techniques et l'identification des corps microscopiques opaques par leurs propri6t6s optiques en lumi6re r6fl6chie et leur duret6 Vickers; le chapitre 4 par K. Norrish et B.W. Chappell, l'analyse chimique par fluorescence X; le chapitre 5 par J.V.P. Long, l'analyse chimique par la microsonde 61ectronique; le chapitre 6 par J.Zussman, l'identification par la diffraction des rayons X, principalement par la m6thode des poudres; le chapitre 7 par J. D. C. McConnel, les techniques de la microscopie et de la diffraction 61ectroniques; le chapitre 8 par R.J.P. Lyon, celles de l'absorption infrarouge; le chapitre 9 par R.J.W. McLaughlin, les m6thodes d'analyse thermique diff6rentielle, thermogravim6trique, dilatom6trique; le chapitre 10 par G. D. Nicholls, la spectrographie d'6mission; le chapitre 11 par L.D.Muller, les mesures de densit6; le chapitre 12 par S.H.U. Bowie, les autoradiographies par les particules alpha et b~ta; enfin le chapitre 13 par R. J. W. McLaughlin, la spectroscopic par absorption atomique. Une bibliographie importante, tenant compte des publications fondamentales jusqu'aux plus r6centes, fait suite ~t chacun de ces chapitres. I1 est certain que ce livre, r6dig6 avec clart6, sera consult6 avec profit par un grand hombre de scientifiques, en particulier ceux des laboratoires de min6ralogie, de p6trographie et de g6ologie. J. WYART

J. Zussman

Papers

An Introduction to the Rock-Forming Minerals

Rock-forming minerals

Physical methods in determinative mineralogy

Rock-forming minerals: Vol. 3 : sheet silicates

Rock-forming minerals. Volume 4B: Framework silicates: silica minerals, feldspathoids and the zeolites.