 | | Journal (article/letter/editorial) | | precipitates were observed. In pigeonites from the Juvinas eucrite, some stacking faults running through the...fringe offset produced by the stacking fault in the Juvinas pigeonites. The magnitude of the mismatch parallel... Magnesian pigeonites from Allan Hills 77257 meteorite, which show diffuse streaks in the X-ray single...a pigeonite-plagioclase achondrite (i.e. Juvinas meteorite), which shows diffuse streaks not related...p r o p o s e d that the parent body o f this meteorite type has undergone a complex history involving |  | | Journal (article/letter/editorial) | | Marie Curie, 4 place Jussieu, 75230 Paris Cedex 05, France (Received December 16, 1980; accepted in revised...5; 27,7; 34,7 et 37,7); une investigation portant sur 125 grains d’olivine repartis dans 8 howardites (Desnoyers...numbo atomique et de fluorescence ont CJ effect&es sur ordinateur a l’aide du programme EMPADR VII (Rucklidge...plusieurs petits groupes approximativement cent& sur Fa 40, Fa 55, Fa 61 et Fa 79. A l’exemple de Pavlovka...d’olivines appartenant aux deux populations principales. Sur les 7 grains trouv&s dans Petersburg, quatre correspondent |  | | Journal (article/letter/editorial) | | many meaosiderites are oonnidered aa a ooherent meteorite assemblage, their silicates con&t&g essentially...These achon~~s make up approximately 6% of all meteorite falls (HEY, 1966). Many of the general features...origin of the whole group, have been reported for Juvinas (LA CROIX, 1926), Pasamonte (Fo~HA~, 1938), Moore...reported & detailed investigation of plagioclase from Juvinas. F~EDR~SSONand KEIL presented detailed antblysesof...have been applied sinoe the earliest days of meteorite petrography and were formalized by BRWIXA (1994) |  | | Journal (article/letter/editorial) | | of olivine Huang, C.P., The removal of aqueous silica from dilute aqueous solution Huneke, J.C., see...The isotopic abundance o f 142 Nd in the Juvinas meteorite 79 Manuel, O.K., see Hennecke, E.W. and Manuel |  | | Journal (article/letter/editorial) | | howardites, and mesosiderites. _____ peak Meteorite# Mass Peak T Source/ Cat. #+ Descr@ (mg) (OC)...MWG EETA79004,102 MWG UNMA7.12 Ibitira MNHN40B Juvinas LEW85303,3 MUG LEW85303,86 MUG LEW85305,2 MWG LEW86001...National d'HistorieNaturelle (Dr. Paul Pellas); MWG, Meteorite Working Group of NASA/NSF; USNM, National Museum...insights into the thermal histories of a variety of meteorite classes (HASAN et al., 1986; KECK and SEARS, 1987;...used to identify grains. We were unable to t&d silica in Serra de Mage; but since quartz is known to |  | Nyquist, L.E, Bogard, D.D, Wiesmann, H, Bansal, B.M, Shih, C-Y, Morris, R.M (1990) Age of a eucrite clast from the Bholghati howardite. Geochimica et Cosmochimica Acta, 54 (8) 2195-2206 doi:10.1016/0016-7037(90)90045-m | Journal (article/letter/editorial) | | WIDELYCONSIDERED to have originated on the same meteorite parent body as eucrites (DUKE and SILVER, 1967)...glassy matrix, subcalcic ferroaugite, fayalite, silica, ilmenite, and Ca phosphate occupy areas of Y750...texturally equivalent to areas now occupied by dominant silica, high Ca augite plus minor low-Ca pyroxene, plagioclase...“‘eucrite triangle” defined by values for plagioclase, silica (probably tridymite) and pyroxene. The data for...BIRCK and ALL&GRE (1978) for the combined data of Juvinas and Ibitira. Thus, the Rb-Sr systematics of the |  | | Journal (article/letter/editorial) | | drawn through the initial 143Nd/144Nd ratio for Juvinas [29]. where (87Rb/S6Sr)m is the measured value... isochron drawn through the initial ratio for Juvinas [29] and only those samples mentioned above fall...Hutchinson, The chronology of the Nakhla achondrite meteorite, Earth Planet. Sci. Lett. 26 (1975) 195. 18 R...in a suite of Hawaiian volcanic rocks of varying silica content, J. Geophys. Res. 70 (1965) 1509. 26 J...I. The isotopic abundance of 142Nd in the Juvinas meteorite, Earth Planet. Sci. Lett. 27 (1975) 79. 30 |  | | Journal (article/letter/editorial) | | (Wooden et al., 1979; Wadhwa and Lugmair, 1995), Juvinas (Lugmair et al., 1975; Manhes et al., 1984), and...thermal ionization mass spectrometry using the H3PO4-silica gel loading method. Measured values were corrected...work, the Pb-Pb mineral isochron age of each meteorite and the errors associated with that age are obtained...Pb isotope composition incorporated into the meteorite at the time of its formation, since Canyon Diablo...possibility of terrestrial Pb contamination of a meteorite prior to analysis is a major problem that has |  | Bast, Rebecca, Scherer, Erik E., Sprung, Peter, Mezger, Klaus, Fischer-Gödde, Mario, Taetz, Stephan, Böhnke, Mischa, Schmid-Beurmann, Hinrich, Münker, Carsten, Kleine, Thorsten, Srinivasan, Gopalan (2017) Reconciliation of the excess 176Hf conundrum in meteorites: Recent disturbances of the Lu-Hf and Sm-Nd isotope systematics. Geochimica et Cosmochimica Acta, 212. 303-323 doi:10.1016/j.gca.2017.05.043 | Journal (article/letter/editorial) | | scatter away from isochron regressions for both meteorite classes, with low-Hf phases such as plagioclase...explain the excess 176Hf. Instead, disturbed meteorite isochrons are more likely caused by terrestrial...Hf behind. Robust Lu-Hf (and improved Sm-Nd) meteorite geochronology will require the development of...undisturbed internal isochron for the Almahata Sitta meteorite (Bast et al., 2017). Several studies have reported...whereas others are far too high, even for the same meteorite. This suggests that the not the cause of the spurious |  | | Journal (article/letter/editorial) | | (147Sm/144Nd)CHuR = 0.1936, the values measured on the Juvinas meteorite [ 121, and &d = 24.7. An analogous notation...heterogeneity if the earth is made of the two meteorite end members shown. Fig. 1 could be the result...such as tonalite and trondjemite which have high silica contents, but low Rb/Sr [40]. The mechanisms for...the earth. There appears to be no evidence in meteorite or basalt data or in estimates 210 of crustal |  | | Catalog/List | | Front Cover: Gibeon mask — an incomparable iron meteorite (see lot 49079, page 62) Above: Foreground —...— the largest complete slice of the Abee meteorite (see lot 49116, page 90) Background — close-up of immense...solar system. It has been hypothesized that a meteorite not only led to the demise of the dinosaurs (providing...amino acids have been discovered in an Australian meteorite. How rare are meteorites? The entire mass of all...iron meteorites? The amount of nickel in an iron meteorite determines the type of crystalline pattern that |  | | Book | | obtain a panorama of the scope and substance of meteorite research. I endeavored to remedy this situation...not exhaustively discussed—the great upsurge in meteorite research along many new lines in recent years...and conservation of meteoritic material. Every meteorite is to some degree unique; and meteorites, unlike...I not been favored bv the curatorship of the meteorite collection of The American Museum of Natural History...Chicago Natural History Museum, the Nininger Meteorite Collection (Arizona State University, Tempe), |  | | Journal (article/letter/editorial) | | Dame Nature hurled pell mell into northwestern France, only about seventy-five miles west of Paris, near...the surface, so rapidly that portions of the meteorite and the ground which were in contact were vaporized...people wondered about what would happen if a large meteorite fell to the ground, but they were limited by the...meteorites and the corollary that the size of the meteorite was quite small relative to the crater it could...an equal mass of TNT. The kinetic energy of a meteorite changes with the square of the velocity and hence |  | | Book (edition) | | .. nepheline family Lcucite and analcime The silica group Other minerals Relative abundance of minerals...mixtures anorthite-diopside anorthite-wollastonite -silica albite-anorthite ... diopside-plag-ioclase ...References in in classification the system magnesia-silica ... 206 208 212 213 215 217 220 223 224 CHAPTER...2. Sudbury Stability of calcium carbonate and silica Assimilation of iron-formation, Canada Cross-section...enclosures 104 10. 11. anorthite-wollastonite-silica albite-anorthite diopside-plagioclase KRUTTIVE |  | | Book (edition) | | family The nepheline family Leucite and analcime The silica group Other minerals i.Relative abundauce of the...anorthite-diopside The system anorthite-wollastonite-silica The eutectic principle and eruptive rocks Freezing...132 133 134 134 136 The system nepheline-leucite-silica Field evidence regarding nepheline Enstatite and...classification Phase-boundaries in the system magnesia-silica References 166 168 172 173 175 178 180 181 183...Cornwall ' ... Stability of calcium carbonate and silica 4 47 50 51 52 65 J\-i ERUPTIVE ROCKS FIG |  | | Journal (article/letter/editorial) | | LEW-86010 weighing 0.98 g was received from the Meteorite Working Group (Johnson Space Center) for the consortium...onto a flat zone-refined Re filament along with silica gel and phosphoric acid using leached lime glass...(2~ external of 15 runs with the same batch of silica gel; Table Id) for all ratios relative to accepted...determined by the local chemistry within the meteorite interior. The Pb isotopic composition of the...products appear to be pervasive within Antarctic meteorite interiors (e.g., GOODING, 1983; BUCHWALD and CLARKE |  | | Journal (article/letter/editorial) | | histories prior to their incorporation in the meteorite. Pebble 12 is extremely LREE depleted, probably...and metal components, constitute nearly 1% of meteorite falls and provide a significant proportion (-8%)...(-8%) of the differentiated silicate meteorite material available for study (SEARS and DODD, 1988). The...OPX and PL is the highest ever measured in a meteorite, with f E’r: values ranging from 0.430 (PL) to...samples indicates that the Sm-Nd systematics of meteorite sificates are often disturbed, as shown by PRIIVZHOFER |  | | Book (edition) | | Village in central. BT Alberta Canada Abee Meteorite Term introduced in 1985. Impact at SA glaciers...deposits industrial minerals SA SA pumice deposits silica as level 3 industrial Lower [applications...River basin in extreme SW Also search Adour. BT France sorption Aegean Sea Adirondacks use Adirondack...Precambrian SA New York Adirondack SA SA SA France. Adrar Interior region in W central Western Sahara...Massif S part of country. BT Pyrenees-Orientales France agmatite Includes use on level 3 under metamorphic |  | | Report (volume) | | ORTHOPYROXENES IN THE SYSTEM MgO-A1203-Si02 SATURATED SILICA. PYROXENES IN THE SYSTEM CLINOPYROXENES JADEITIC...CaO-MgO-A1203-Si02 SATURATED 314 SILICA . . WITH SILICA. 319 WITH SILICA. 325 CLINOPYROXENES . REFERENCES:...kinking For example, line represent Allende meteorite a radius = with all trivalent to be more reason-...structure of a Ti3+ fassaite from the Allende meteorite. Drysdale, D. J. (1975) 60, 105-110. Hydrothermal...213-222. Cell parameters of orthopyroxenes. in silica B35, 25-30. Soc, Am. Spec. Mineral. Huckenholz |  | | Book (edition) | | the Bibliog¬ raphy and Index of Geology for 1970: France - stratigraphy Devonian, Ariege, Saint-Barthelemy...indexer who prepared this entry was supposed to use "France" on level 1 and "stratigraphy" on level 2, but...the area within the city limits, but also to the sur¬ rounding region. Terms for materials in GeoRef,...deposits SA industrial minerals SA pumice deposits SA silica Abilene Kansas Term introduced in 1989. City...Italy NT Chieti NT Marsica AJjsaroka Fault Abee Meteorite aa Taylor County Texas Texas Southwestern U |  | | Journal (article/letter/editorial) | | of eucrites Stannern and Nuevo Laredo in lunar-meteorite comparative studies 9(4): 341-344 0014 Ahrens... C.; and Carron, J . P . Donnees experimentales sur la diffusion des elements majeurs entre verres ou...Distribution de la matiere organique dans la meteorite d'Orgueil par microscopic en fluorescence 19(4):...Andrieux, J.; Fontbote, J. M.; and Mattauer, M. Sur un modele explicatif de l'arc de Gibraltar [An explanatory...; et al. T h e exposure history of the Pitts meteorite 9(4): 317-321 0199 Begemann, F.; Vilcsek, E |  | | Book | | Guttard studied the rocks of the Auvergne region of central France and recognized many recently extinct...a volcano. Desmarest (1771) also worked in the Auvergne and he established that these volcanoes had produced...relatively low silica content, and the other silicic with a relatively high silica content. He also...temperature and pressure, and also with a lowering of the silica content of a melt. Scarfe and Hamilton (1980: 319)...hawaiitic melt is 0.75 as compared to 0.06 in the silica-rich comenditic melt. Comenditic melts are thus |  | Pass, H. E., Cooke, D. R., Davidson, G., Maas, R., Dipple, G., Rees, C., Ferreira, L., Taylor, C., Deyell, C. L. (2014) Isotope Geochemistry of the Northeast Zone, Mount Polley Alkalic Cu-Au-Ag Porphyry Deposit, British Columbia: A Case for Carbonate Assimilation. Economic Geology, 109 (4) 859-890 doi:10.2113/econgeo.109.4.859 | Journal (article/letter/editorial) | | 5 t Au, and 65.1 t Ag), hosted by silica-undersaturated to silica-saturated monzonitic intrusions of...K-feldspar-phyric monzonite. Stage 2 fluids were silica undersaturated, high temperature (>350°C), CO2...presented are consistent with the hypothesis that the silica-undersaturated alkalic Mount Polley Complex formed...precipitation concurrent with Cu-Au mineralization, and silica undersaturation of the magma. The CO2 released...have promoted magmatic-hydrothermal brecciation. Silica-undersaturated alkalic porphyry systems may preferentially |  | | Book | | Pretoria, South Africa); H. H. Nininger (Amer ican Meteorite Museum); J. J. Orcel (Museum National d'Histoire...(1864) 1492-B-1 Brant, S. A poem on the Ensisheim meteorite. (written in Latin with German translation). Book:...Printed by W. Stansby, London ( 1625) Bache, A. Meteorite at Antony, near Plymouth. Pamphlet: 1640-B-l The...1 - C - l * Carli, Ii'. No Title (on the Yago meteorite ) . Vallisnieri Opere Fisico - Mediche, Venezia...231-45 (1721) 1722-M-l Maraldi, J. P. Observations sur differents meteores de l' annee 1721. Hist. ·acad |  | | Book (volume) | | . . . .144 . . . . BARIUM FELSPARS.166 SILICA MINERALS.179 Quartz, Tridymite, Cristobalite ...0-6 0-8 1. Adularia, Bourg d’Oisans, Dauphine, France (Zaniewska-Chlipalaka, 1937). 2. Adularia, St....composition of the liquid formed is leucite 57-8, silica 42-2 per cent.: the eutectic tempera¬ ture between...composition leucite 45-6, silica 54-4 per cent, (or potassium felspar 58-2, silica 41'8 per cent.). Thus...of composition A, undersaturated with respect to silica, would cool to B, when leucite would begin to crystallize |
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