 | | Journal (article/letter/editorial) | | four pyroxene phases and plagioclase, with minor tridymite, ilmenite, chromite, troilite, iron metal and...eucrite parent body in that it could be dances of meteorite types and spectral studies of construed as evidence...plagioclase plus four pyroxenes. Minor phases are tridymite, ilmenite, chromite, troilite, iron metal and...optically by HESS and HENDER- SON(1949). Tridymite Tridymite is essentially pure SiO, with trace amounts...well-developed crystals. Acicular inclusions in tridymite were observed but were too small to permit quantitative |  | | 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) | | Chromite Amorphouscarbon Diamond Daubreelite Tridymite Lawrencite Magnetite Oldhamite Hydrocarbons A...and octahedrons may be observed. In the Ochansk meteorite, von Siemaschko observed actual crystals made...of orthorhombic pyroxenes alone. These are the meteorite of Bishopville, practically composed of enstatite...diopside was identified by Maskelyne in the Bustee meteorite. It occurred in grains and splinters and was of...Rammelsberg about 35 per cent. of the stones of Juvinas and Stannern. Of the other members of the plagioclase |  | 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)...Ar, a minor phase with higher KfCa (possibiy “tridymite” or associated phases which also contain high...shown by low tem~mture extractions occurred from tridymite more recently than -0.7 Ga ago. A second alternative...1k9.4 75.4+12.2 28.1+8.5 the plagioclase, that tridymite was degassed more recently than -0.7 Ga ago, but...plagioclase reset by an event - 3 Ga ago and “tridymite” reset by a milder event or environment less than |  | | Journal (article/letter/editorial) | | (Wooden et al., 1979; Wadhwa and Lugmair, 1995), Juvinas (Lugmair et al., 1975; Manhes et al., 1984), and...Ti-chromite, ilmenite, troilite, and rare metal. Tridymite is present in Moore County. The overall texture...plagioclase and pyroxene with minor amounts of tridymite, chromite, ilmenite, and rare troilite and metal...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 |  | | 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;...SiOz grains (with fan-like shapes suggestive of tridymite) were removed from the coarse-grained unequilibrated |  | | 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 | | 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), |  | | Book (edition) | | Hig-h and low quartz IN THE MAGMA mag-ma •• Tridymite Calcite and woUastonite Action of peridotite... pressure, at all temperatures up to 870" C. tridymite between 870° and 1470° C. and cristobalite from...which ensure free movement of the molecules, both tridymite and cristobalite transform into quartz when the...unfavourable to it. Thus one can understand why tridymite and cristobalite are often found point at 1713°...unstable forms." sarily ; A. Lacroix claims that tridymite was formed, in the lavas Pelee, by crystallization |  | | Book (edition) | | The geological thermometer High and low quartz Tridymite ... Calcite and wollastonite Action of peridotite...Fell, Cumberland 15. Map of the Querigut granite, France 16. Map of the Palabora complex, Transvaal 17....pressure, at all temperatures up to 870° C.; tridymite between 870° and 1470° C.; and cristobalite from...which ensure free movement of the molecules, both tridymite and cristobalite transform into quartz when the...unfavourable to it. Thus one can understand why tridymite and cristobalite are often found in lavas, but |  | | Book (volume) | | BARIUM FELSPARS.166 SILICA MINERALS.179 Quartz, Tridymite, Cristobalite . . . . .179 NEPHELINE GROUP...0-6 0-8 1. Adularia, Bourg d’Oisans, Dauphine, France (Zaniewska-Chlipalaka, 1937). 2. Adularia, St....eutectic tempera¬ ture between potassium felspar and tridymite is placed at 990°C.+ 20°C. at a composition leucite...would solidify as a mixture of orthoclase and tridymite. If, however, perfect equilibrium is not obtained...des roclies volcaniques du massif du Mont-Dore (Auvergne). I. Les mineraux. II. Petrographie systematique |  | | 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...pyroxene (primarily pigeonite). with subordinate tridymite. phosphate, and opaque phases (Cr- spinel, ilmenite...OPX and PL is the highest ever measured in a meteorite, with f E’r: values ranging from 0.430 (PL) to |  | | Book (edition) | | Village in central. BT Alberta Canada Abee Meteorite Term introduced in 1985. Impact at SA glaciers...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...In Cevennes BT France Mountains in S. Aiguilles Rouges Alpine range in SE. BT France Aiken County W |  | | 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...essentially the same. Examples of such parameters are sur- face gravity, radius of curvature of the planet...doubt that sulphur is extremely abundant on the sur- face of Io. It is also likely that some of the...sub-oceanic upper mantle material being thrust onto the sur- face rocks, of the usually from beneath obtained |  | | Report (volume) | | 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...spectrum of a titaniumrich fassaite from the Allende meteorite showing the Ti3+ features and the Ti3+/ Ti 4+...aided by the study of meteoritic the Allende meteorite high titanium is unusual pyroxenes pyroxenes...fassaite iron and titanium from the Angra dos Reis meteorite, as major elements, containing is notable because |  | | Book | | quartz-coesite and graphite-diamond transitions, while the tridymite-cristobalite transition is caused by a change...polymorphs and their densities at 1 bar g/cm' Quartz Tridymite Cristobalite Coesite Stishovite 2.65 2.26 2.33...low quartz-high quartz, and high quartz-tridymite, and tridymite-cristobalite. At high pressures above...of the initial liquid has crystallized. At e tridymite begins to crystallize, and the melt will remain...disappeared, that is, tridymite when the composition of the mixture is m. After all the tridymite has entered, |  | | 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,...Italy NT Chieti NT Marsica AJjsaroka Fault Abee Meteorite aa Taylor County Texas Texas Southwestern U...Basin River basin in extreme SW France. Also search Adour. BT France Adelaidean SE Australia. Middle |  | | Report (issue) | | and the third took place The meeting in Paris, France, in 1974. attendance has doubled at each successive...Lanphere 6 Early history of the solar system using meteorite radiochronologies, by C. J. Allegre, J. L. Birck...Geochronology of Paleozoic magmatism in the Massif Central (France); its connections with tectonism and metamorphism...ultramafic complex and its country rocks (Sauviat-Sur-Vige, French Central Massif), by Dieter Gebauer,...magmatism of early Paleozoic age in the Massif Central (France); the leptyno-amphibolitic group, 337 by C. Pin |  | | Book | | 4. Silica Minerals: Quartz, Cristobalite, and Tridymite 5.1.5. Other Silicate Minerals 5.1.6. Comparative...Laboratoire de Geologie Dynamique Interne Orsay Cedex FRANCE Abt. Planetare Erkundung DLR - Institut fur Optoelectronik...and Japanese expeditions. Since the first such meteorite was collected in 1979, 10 have been recovered...billion years of planetary evolution, catastrophic meteorite bombardment, and intense igneous activity that...mission: 16—Luna 16 20— Luna 20 24— Luna 24 Lunar meteorite names and numbers are listed in Table 2.3. For |  | | Book (volume) | | application to the determination of Copernican meteorite flux G. A. SWANN and V. S. REED 151 Problems...noncohesive materials such as sand; and (3) terrestrial meteorite impact craters (specifically the Ries Crater,... the largest well-preserved terrestrial meteorite crater). The application of these models to lunar studies...noncohesive materials such as sand, and (3) terrestrial meteorite impact craters. MOST LUNAR INVESTIGATORS *Publication...distribution. TERRESTRIAL METEORITE CRATERS Among terrestrial meteorite craters, the Meteor Crater |  | | Book | | International Bureau of Weights and Measures, Sevres, France. Second: the duration of 9 192 631 770 periods...Geochimiques, France (CRPG) GOV77 GA granite (Andlau, Vosges, France) GH granite (Hoggar, France) BR basalt...(Essey la Cote, Lorraine, France) GOV79 Mica-Fe biotite (Massif Central, France) Mica-Mg phlogopite (Bekily...Technique, France (ANRT) ANRTI: GOV82 DR-N diorite (Rocher de Neuntelstein, Vosges, France) serpentine...serpentine (Bagnenelles, France) UB-N BX-N bauxite (Brignoles, Vosges, France) DT-N kyanite (Nanga-Eboko, Cameroun) |
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