 | | Journal (article/letter/editorial) | | Insizwa sill (South Africa), the Great Dyke (Zimbabwe), and the Bushveld Complex (South Africa). We present...susceptibility does not necessarily correspond to a new magma batch, unless it is also associated with a...Merensky Reef, J-M Reef, Böhmke Reef), Cr, V, Ni, Fe, Co and Cu and have been the focus of numerous geochemical...rocks in mafic complexes (e.g., Hattingh, 1991; Hargraves et al., 1999; Ferré et al., 2002; Middleton et...Insizwa Sill in South Africa, the Great Dyke in Zimbabwe, and the Bushveld Complex in South Africa. Additional |  | | Journal (article/letter/editorial) | | Division of Exploration and Mining, Wembley, Western Australia With 5 Figures Received March 24, 1994; accepted...composition of cumulus olivine. Cumulates with olivine forsterite content greater than 93 mol percent typically...grains in cumulates with forsterite less than 91 mol percent. In the forsterite 91-93 interval, chromite...dunites, having olivines with greater than 93 mol.~ forsterite, usually contain very little or no chromite,...chromite composition (trivalent ion components) vs. forsterite content of coexisting olivine in komatiitic cumulates |  | | Journal (article/letter/editorial) | | Geological Sciences, Rutgers University, New Brunswick, New Jersey 08903, USA z Department of Earth and...80 I 9 0 Fe2S[04 tool.per cent Fig. 1. The forsterite (Mg2Si04) - fayalite (Fe2Si04) solidus-liquidus...Observations Figure 1 is a reproduction of the forsterite-fayalite solidusliquidus loop determined experimentally...olivine grains shows them to be a very homogeneous forsterite 49.8_+0.6, fayalite 50.2+0.5. Consequently, any...basalt-like concentrations of S i O 2 t o the join forsterite-fayalite results in the usual case of olivine |  | Gleeson, S. A., Herrington, R. J., Durango, J., Velasquez, C. A., Koll, G. (2004) The Mineralogy and Geochemistry of the Cerro Matoso S.A. Ni Laterite Deposit, Montelibano, Colombia. Economic Geology, 99 (6) 1197-1213 doi:10.2113/gsecongeo.99.6.1197 | Journal (article/letter/editorial) | | KOLL GK Consulting, 170 Nigel Road, Springs 1559, South Africa Abstract The Cerro Matoso S.A. Ni laterite...other areas of western Colombia (e.g., Duncan and Hargraves, 1984; Mattson, 1984; Revillon et al., 2000)....least part of the profile. Only Si, Al, Fe, Mg, Mn, Co, Cu, Ni, Sc, and Zn were found at concentrations...643 509 82 1133 264 375 48 364 410 1424 2009 Co (ppm) 104 29 24 65 183 117 55 78 48 53 26 40...428 0.317 0.271 0.863 5 114 50 130 140 191 336 Co (ppm) 2 21 80 28 41 25 146 Cu (ppm) 1 20 15 |  | | Journal (article/letter/editorial) | | form of phenocrysts. A small proportion of more forsterite-rich olivine grains are xenocrysts from a more...currently active Galapagos hotspot ŽDuncan and Hargraves, 1984; Burke, 1988; Sinton et al., 1998.. Through...central America and along the western coast of South America, it was obducted onto, or incorporated into...ReÕillon et al.r Lithos 49 (1999) 1–21 ´ Fig. 3. Forsterite content of olivine of two Curaçao picrites ŽCu50...minor oxides Ž5–10%.. The trace elements ŽCu, Zn, Co, V, Ni, Cr, Ga. were determined in pressed powder |  | | Journal (article/letter/editorial) | | estimated for Precambrian evaporites (Ronov, 1964; Hargraves, 1976). The time of the first appearance of evaporites...unmetamorphosed evaporites as old as 3.4 Ga in Western Australia (Lowe, 1982) and of several Archean metamorphic...Siberia and Madagascar (Serdyuchenko, 1975), and South Africa (Vinogradov et al., 1976). In fact, the recognition...objectives of this paper are, first to describe a new metamorphic sequence in the middle Proterozoic Oaxacan...The marbles (Table I) are generally magnesian, forsterite, diopside, dolomite, phlogopite, rare humite |  | | Book | | CLASSIC MINERAL LOCALITIES OF THE WORLD Asia and Australia = _ |) VieBAtO TATA JARS LIPOW Si. ao sé ...WORLD Asia and Australia Philip Scalisi David Cook VAN NOSTRAND REINHOLD COMPANY NEW YORK CINCINNATI...Nostrand Reinhold Company Inc. 135 West 50th Street, New York, N.Y. 10020 Van Nostrand Reinhold Publishing...Nostrand Reinhold Australia Pty. Ltd. 17 Queen Street Mitcham, Victoria 3132, Australia Van Nostrand Reinhold...Classic mineral localities of the world, Asia and Australia. Bibliography: p. Includes index. 1. Mines and |  | | Journal (article/letter/editorial) | | 823-832, 1995 Oscillatory zoning in meteoritic forsterite I.c,NrM. Srrrrr Department of Geophysical Sciences...Chicago, 5734 South Ellis Avenue, Chicago,Illinois 60637, U.S.A AssrRAc-r Some isolated forsterite grains in...Under reducing conditions assumedpresentduring forsterite growth, the varying elementsshould be trivalent...small substitution of the spinel component into forsterite. This same type of substitution is proposed for...oscillatory-zoned minerals, crystallization of the forsterite from a liquid is probable. Currently, no such |  | | Journal (article/letter/editorial) | | during dissolution. In a series of papers, Franke and co-workers (Heimann et al., 1970, 1971; Lacmann et al...the corners of the growth morphology to produce new faces (e.g. fig. 1), or put another way, the corners...Kirkpatrick (1983) report that dissolution of quartz, forsterite, diopside, and enstatite in the system Mg2SiO4-CaMgSi206-SiO2...by Tsukamoto et al. (1983, fig. 4a, b). Using a new experimental technique whereby crystals may be observed...Buckley, H. E. (1951) Crystal Growth. John Wiley, New York, 571 pp. Correns, C. W. (1969) Introduction |  | | Journal (article/letter/editorial) | | intra-plate and primitive island arc settings (south Nicoya, Herradura, Osa) (Schmidt-Effing, 1979; Frisch...parent/ flour in an agate mortar or mill. H O and CO were daughter ratios, especially Rb/Sr and U/Pb,...the Galápagos hotspot (Flüh, 1983; Duncan and Hargraves, 1984). Additional support for an intra-plate...constrain the paleoenvironment of these terranes. New major element, trace element and Sr-Nd-Pb isotopic...AN110 are from north Nicoya, AN53 and AN86 from south Nicoya. AH"Herradura; AQ"Quepos Sample AN3 w.r |  | | Journal (article/letter/editorial) | | うで あ る｡ NiligongiteLc十Ne十Cpx十Mel WestK㎞berley,Australia(WadeandPrider,1940) 3.含 WolgiditeCpx十Amp十Ph1十Lc...ソー ダ を含 む水 に よ っ て,容 易 に方 沸 石 少 くな い｡最 近EPMAで Walesのleucitite中 Na(Feo.52+Ti｡.δ 高 い こ とか 針)Si206が ...syst㎝ た るKAISiO,一 い わ ゆ るPetrogeny'sresidual 来,Forsterite・‑diopside‑ akermanitetileucite系(Gupta,1972)な...* T.F.D. (1975), Leucite from East Greenland. A new petrographic sub-province of the Tertiary North Atlantic...Rudolf region: Part II. The lavas of North Island, South Island and the Barrier. Lithos 4, 305-323. * Butakova |  | | Journal (article/letter/editorial) | | compositional dependence of the activities of forsterite, fayalite, anorthite, and albite from experimental... The natural logarithms of the activities of forsterite and anorthite can be closely approximated as...speciation in silicate melts. The activity models for forsterite and anorthite provide excellent geothermometers...Stebbins and Carmichael 1981). In light of these new data a number of models for the thermodynamic behavior...fractions of mineral components such as anorthite, forsterite, or quartz in the melt. In a relatively simple |  | | Journal (article/letter/editorial) | | schists 944 Errata ADE-HALL, JAMESM. with R, Hargraves: Magnetic properties of separated nineral phases...shock-af942 fected rhodonite: A rePly Alazanite 161 new mineral (abstr) Albite authigenic, chenistry, 235...Multiple beam direct lattice inaging compounds of new nixed-layer of the bastnaesite-syn351 chisite series...palladoarsenide * Prepared by Wen H. Huang, University of South Florida; Andrea Ross, Carl Francis, John Higgins...Astrophyllite nonoclinic Mg-: astrophyllite: (abstr) 737 new nineral (abstr) 736 hydroastrophyllite Atonic arrangenent' |  | | Journal (article/letter/editorial) | | available for only a few minerals, such as spinel, forsterite, quartz and some garnets. Another limitation...present study: spine1 (MgAl,O,; pO: 3.58 g cm-‘), forsterite (Mg,SiO,; pO: 3.22 g cme3>, adularia (KAISi,O...polycrystalline spine1 and single crystals of forsterite were used. Natural single crystals of adularia...were used. The physical properties of spine1 and forsterite have been studied at high pressures and high...sphere) were obtained for experiments in which forsterite spheres were used as buoyancy markers. In the |  | | Journal (article/letter/editorial) | | and adsorption properties of Fe, Mn, Cu, Ni, Cd, Co and humic acids in a river water E. TIPPING 191...bracketed in a nearshore phase equilibrium solvus for CO,-H,O-3.6 marine data wt ‘I,, salt LINCOLN S....Fixation ‘i/r r.it,.n’ de UOi+, Cu2+, Ni2+, Zn2’, Pb’+, Co’+, Mn2+, ainsi que de VO;. MOO:- et GeOz- ROBERTC...Su~ss of forsterite-fayalite chronologies olivine solutions for the St SCverin Sr, Cd, Mn and Co distribution... 657 Etude des inclusions fluides du syst&me N,-CO, de dolomites et de quartz de Tunisie septentrionale |  | | Journal (article/letter/editorial) | | Dalbridge, South Africa 2Department of Geology, University of Natal, Pietermaritzburg, South Africa With...making use of the speculative Fo-Di-An-SiO 2 (forsterite-diopside-anorthite-silica) system of Morse (1980)...sequence in the tholeiitic Elephant's Head Dyke of South Africa. The possibility that the orthopyroxene textures...state. Furthermore, the Elephant's Head Dyke and New Amalfi Sheet represent tholeiitic basaltic magmas...crossing of a liquidus, which may either cause a new phase to nucleate or an existing phase to cease growing |  | Kouchi, A., Hosoya, S., Kitamura, M., Takei, H., Sunagawa, I. (1983) The effects of crystallographic orientation, interface type and growth kinetics on Ni distribution between olivine and its melt. Physics and Chemistry of Minerals, 9 (3) 167-172 doi:10.1007/bf00308374 | Journal (article/letter/editorial) | | following method were used as starting materials. Forsterite (MgzSiO4) single crystals were grown by the Czochralski...1.20 168 amorphous silica powder (Kanto Kagaku Co.) were used. Materials were placed in a Pt crucible...rate, 1.6 mm/h; growth direction, <100>; seed, forsterite; rotation rate, 30/30 rpm; composition of starting...Keel= Cs(x= O)/Co, where Cs(x=0) is the value at x = 0 , extrapolated from the data, and Co is the composition...(1969) Preparation of ferrite single crystals by new floating zone technique. IEEE Trans Mag MAG-5:285-289 |  | | Journal (article/letter/editorial) | | magma evolved from picrite to basalts. However, the new petrological, geochemical and isotopic data presented...of the Caribbean basin as well as parts of the South and Central America Pacific coast. Its total area...partial melting within a mantle plume (Duncan & Hargraves, 1984). Published radiometric ages indicate two...currently active Galapagos hotspot (Duncan & Hargraves, 1984; Pindell et al., 1988; Pindell & Barrett...the plateau was transported between the North and South American plates through eastward movement of the |  | | Journal (article/letter/editorial) | | partitioning have been measured for anorthite, forsterite, and diopside grown from synthetic compositions...fractional crystallixation. Forsterite Forsterite was grown from forsterite, anorthite,s silicaIs (by weight)...(e.g. Al) or TABLE 1. T t (“C) bnin) 619 FORSTERITE/MELT PARTITIONING DATA Size (urn) 1383 1 ...on the seed are more difficult to measure since new growth may fill in irregularities on the seed crystal...thokiites to olivine meliititcs from southeastern Australia utilizing geochemicai and experimental petrological |  | | Journal (article/letter/editorial) | | National Laboratories, Division 1 1 53, Albuquerque, New Mexico 8 7 1 85 KEY WORDS: impact, materials science...the Earth and planetary sciences. One radically new concept is that hypervelocity impact is a major process...Short durations at the high-pressure state mean that new phases have very little time to grow, so shocked...chemistry has been driven by the desire to synthesize new materials or to modify material properties by changing... on the other hand, attribute the growth of the new phases to transport by rapid shock-induced plastic |  | | Journal (article/letter/editorial) | | literature regarding the origin of the podiform deposits. New hypotheses considering dynamic partial melting, melt...are integral parts of ophiolite complexes, these new concepts should be taken into consideration in discussing...000 tons of ore (Dela Cruz, 1981). The Tiebaghi (New Caledonia) and Golalan {Turkey) deposits each comprise...bodies and enclosing dunite of the Massif du Sud (New Caledonia) were formed by interaction of a magma...chromitite bodies by metasomatic processes is a new hypothesis. The main argument of the metasomatic |  | | Journal (article/letter/editorial) | | example, enstatite (MgSi03) melts incongruently to forsterite and liquid at pressure less than about 3 kbar...at 1 atm pressure, CO2 dissolves primarily to form CO�- complexes (Pearce 1964) and H20 forms OH complexes...polymerization (different NBO/Si; e.g. enstatite and forsterite) shift toward more silica-rich compositions with...Carbon dioxide dissolves in silicate melts to form CO� - complexes (Pearce 1964, Eggler & Rosenhauer 1978)...nonbridging oxygens in the melt to a bridging oxygen and CO� -, thus decreasing the NBO/T ratio of the melt. |  | RENNE, P, MATTINSON, J, HATTEN, C, SOMIN, M, ONSTOTT, T, MILLAN, G, LINARES, E (1989) 40Ar/39Ar and U-Pb evidence for late proterozoic (Grenville-age) continental crust in north-central Cuba and regional tectonic implications. Precambrian Research, 42 (3) 325-341 doi:10.1016/0301-9268(89)90017-x | Journal (article/letter/editorial) | | and Gas Corporation, 1515 Hope Street, Suite 204, South Pasadena, CA 91030 (U.S.A.) 4Institute of Physics...complex lay substantially to the southwest (present-day co-ordinates) during the Early Paleozoic. Following...Wadge and Burke, 1983; Mattson, 1984; Duncan and Hargraves, 1984; Burke et al., 1984; Pindell, 1985), ©...implications for the relationship of the North and South American continents prior to the Middle Jurassic...the Laurentian and Amazonas cratons of North and South America respectively, during the Late Proterozoic |  | | Journal (article/letter/editorial) | | regular manner within the layers studied. The forsterite composition of olivine is consistently higher...Department of Geological Sciences, State University of New York, Binghamton, NY 13901. [Journal ofPtmlogy, ...moving from north to south the layers at the top of the sequence tend to pinch out and new layers are added...observed for the silicate minerals although the forsterite content of olivine (which was found only in the...only one significant variation was found; the forsterite content of olivine increases towards the bottom |  | | Journal (article/letter/editorial) | | Energetics of glasses in the system diopside-anorthite-forsterite Alexandra Navrotsky, Papu Maniar, and Richard...melts along the anorthite-diopside and anorthite-forsterite joins. The present work reports the results of...calorimetry of glasses in the system diopside-anorthite-forsterite. The data are interpreted in terms of heats of...hypothetical glass of forsterite composition; the enthalpy of vitrification of forsterite is compared to its...system diopside-anorthite-forsterite, though not glass-forming at forsterite-rich compositions, offers |
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