 | | Journal (article/letter/editorial) | | 2% TiO2 and 10% A1,O3) in the Angra des Reis meteorite, meteoritic OH' .o A M~Z $1206 C . E . ...in meteorites. A: enstatite and clinoenstatite in enstatiie chondrites and enstatite achondrites; B: diopside...diopside in the Pena Blanca Spring enstatite aehondrite; C: enstatite in silicate inclusions in irons;...as indicated by the presence of tridymite in enstatite chondrites and in many achondrites and stony-irons...Chondrites Enstatite (I l) Olivine-bronzite (227) Olivine-hypersthene (303) Carbonaceous (31) Enstatite, nickel-iron |  | | Journal (article/letter/editorial) | | VOL 52. SEPTEMBER_OCTOBER. 1967 OLIVINE IN ENSTATITE CHONDRITES R. A. BrNNs, Deparlment oJ Geology...olivine has hitherto been consideredabsent from enstatite chondrites.In a recent review of the mineralogy...(1966) noted that many stones, having orthorhombic enstatite and sodic plagioclaseas their main silicate constituents...new investigation of thoroughlv recrystallized enstatite chondrites represented in the British Museum (Natural...been attained during recrystallization. Three enstatite chondritesin the British Museum collection may |  | | Report (issue) | | GEOLOGICAL SURVEY OF INDIA CATALOGUE SERIES NO.l / CATALOGUE OF THE METEORITE COLLECTION OF THE GEOLOGICAL...GEOLOGICAL SURVEY OF INDIA IN THE INDIAN MUSEUM, CALCUITA By P. R SEN Gl' I'TA AND SlTDlPTA ~EN GUPTA...Geological SUTlley of India Published by order of the Government of India 1982 Photomlorographs...reftected polarised light} of the Dhajala meteorite, a 1976-fal1 in India (diameter of the complete chondrule...polarised light) of ' the Muzaffarpur meteorite, a 1964-fall in India (length of the field is )'.15 mm). |  | Olsen, Edward J., Bunch, T.E., Jarosewich, Eugene, Noonan, Albert F., Huss, Glenn I (1977) HAPPY CANYON: A NEW TYPE OF ENSTATITE ACHONDRITE. Meteoritics, 12 (2) 109-124 doi:10.1111/j.1945-5100.1977.tb00336.x | Journal (article/letter/editorial) | | HAPPY CANYON: A NEW TYPE OF ENSTATITE ACHONDRITE Edward J. Olsen Field Museum of Natural History Chicago...History Walhington, DC 20560 Glenn I Huss American Meteorite Laboratory Box 2098 Denver, CO 80201 Happy Canyon...101°33.6'W, Texas] consists of about 85 vol. % enstatite (Fs 0.4%), 5 to 10 vol % plagioclase (An 26%)...weathering. The meteorite has a cumulate texture, uniform-size euhedral, prismatic crystals of enstatite (0.3 to...plagioclase, diopside, troilite, and metal: The enstatite crystals are dominantly disordered and occur in |  | Swindle, T.D, Caffee, M.W, Hohenberg, C.M, Lindstrom, M.M, Taylor, G.J (1991) Iodine-xenon studies of petrographically and chemically characterized Chainpur chondrules. Geochimica et Cosmochimica Acta, 55 (3) 861-880 doi:10.1016/0016-7037(91)90347-8 | Journal (article/letter/editorial) | | petrographically and chemically characterized Chainpur chondrules T. D. SWINDLE,‘-* M. W. CAFFEE,‘~~C...samples of 18 chondrules and matrix from the Chainpur (LL3) meteorite to study variations in & the ratio of...heterogeneity cannot satisfactorily explain the Chainpur data. However, there are also difficulties with...interpreted their studies of IAB iron meteorites and enstatite chondrites, respectively, as consistent with a...matrix from the unequilibrated ordinary chondrite Chainpur (LL3.4). Our primary objective is to learn the |  | | Journal (article/letter/editorial) | | the ordinary chondrites and the carbonaceous or enstatite chondrites. The origin of chondrules and chondrites...of all available chondrites in several major meteorite collections, * 3. Rnally, we included ehondrites...due to the polymict (WAHL, 1952) nature of the meteorite (VAN SCHMUS,1966)*. In the others it may have...chondritic meteorites are recognized by most workers: Enstatite chondrites, carbonaceous chondrites, H-Group chondrites...fragments are less heterogeneous than those of the meteorite as a whole, suggesting more advanced xecr~t~zat~on |  | | Journal (article/letter/editorial) | | Term "Meteorite" MICHAEL J. FROST British Museum (Natural History), London The term "'meteorite" has...suggestions for its future use. The modern usage of "'meteorite" to include meteoric stones, stony-irons and irons...2,000 miles away, may have come from the same meteorite. This has also been the consistent usage of publications..."This ... meteorite fell. ..as a shower. .. " (Keil et al 1964) and "The Fukutomi meteorite consists of...et al 1966). The alternative common usage of "meteorite" as meaning "'an extra-terrestrial object fallen |  | | Report (issue) | | constancy of the sum of molecular proportions in a meteorite analysis, since I believed that the relationship...carbonaceous chondrites of types I and II or for the enstatite achondrites. However, there are certain indications...of type I and two examples of type II, and one enstatite achondrite. Since my own analyses are almost entirely...Cent of Fe Cation PerCent of Fe Manbhoom Ch Chainpur Ch 19.11 19.78 18.91 19.71 Mason and Wiik,...For a meteorite consisting of pure enstatite, MgsiO,, the sum will be 2.00, and for a meteorite consisting |  | | Report (volume) | | THE GEOLOGICAL SURVEY OF INDIA, RECORDS OF THE GEOLOGICAL SURVEY OF INDIA. tt Volume Published...I.M.E., B.Sc., Survey 1—16 M.A., F.G.S. of India. F.G.S.. By Cyril Fox, from the Salt Range. Assistant...Assistant Superintendent, . (With Plates 11 to 13) of India. . Steatite Deposits, Idar State. F.G.S., Superintendent... 102—126 127—132 3. By H. H. Survey of India of India during 1911. C. I.E., F.G.S., Director, Geological...Survey of India for the year 1911. H. H. Hayden, . . Middlemiss» B.A., Survey of India. (With Plates |  | | Journal (article/letter/editorial) | | referred to in this paper as C-group chondrites. The enstatite chondrites will be referred to as E-group chondrites...rL and FRV.DRIKSSOZq (1964). The proper names "enstatite", "hypersthene", "bronzite", "carbonaceous", and...represents those chondrites referred to as the enstatite chondrites (MASON, 1966). The unique mineralogical...notes t h a t the decreasing Fe contents of the enstatite chondrites appear to parallel their degrees of...and not related to the primary origin of the enstatite chondrites. (b) C Group This group is based on |  | | Journal (article/letter/editorial) | | meteriel as the surrounding prinoipsl mass of the meteorite; polymiot brecoies ere those in which the clsets...one enother. 2027 W. R. 2028 VAN SCHMUS enstatite achondritic material with black chondritic fragments...JAROSEWICH, 1967 ; BINNS, 1967) show that this meteorite belongs to the L-Group chondrites as defined by...Mez&Madaras, where it co-exists with iron-poor enstatite and fayaliticolivine. The latter two minerals...magnesium end members (i.e. for&rite-MgsSiO,; enstatite-MgSiOs). The small amount of other cations (e |  | | Journal (article/letter/editorial) | | 3Physical Research Laboratory, Ahmedabad 380 009, India of Natural History, Chicago, IL 60605, and Department...isotopic compositions reflect the iron-group of the meteorite (H, L, or LL). Isotopic uniformity of H3 to H6...the population of chondrules in carbonaceous or enstatite chondrites. Chondrules define an isotopic mixing...identification of genetic association with other meteorite types (achondrites and iron) and for recognition...combination of these processes has left each planet and meteorite parent body with a distinctive oxygen isotopic |  | | Journal (article/letter/editorial) | | falling subcooled droplets of alumina, enstatite, forsterite, enstatite-albite and forsterite-albite mixtures...composition and then agglomerated to form the meteorite parent body(ies) [5, 6]. If the latter hypothesis...mixtures of magnesium-rich olivine, fayalite, enstatite, and oligoclase of bulk composition approximating...(Mg2SiO4), enstatite (MgSiO3), mixtures of forsterite with albite (NaA1Si308), and of enstatite with albite...shown in fig. 2. In fig. 2a, an excentro-radial enstatite spherule is shown which has a texture typical |  | | Journal (article/letter/editorial) | | microscopist, Gustav Tschermak, and the outstanding meteorite collection of that day, the Vienna collection...meteorites. Table 1 traces the development of meteorite mineralogy over the following seventy years. It...extracted sulfur with alcohol from the Cold Bokkeveld meteorite, and later investigators extracted it from other...weathering. In 1955, therefore, to specializein meteorite mineralogy might well have beenconsideredthe refugeol...then, as is illustrated in Table 2.The number of meteorite minerals has more than doubled in the last ten |  | | Journal (article/letter/editorial) | | body, or possibly two parent bodies, exists for enstatite chondrites (KENNEDY et al., 1988). But for the...technique is applicable as a chronometer for meteorite formation; since the decay of ‘29Iis so rapid...chondrites, that different fragments of the same meteorite, separated perhaps by only a few cm, have had...possible. PROCEDURES AND RESULTS The whole-rock meteorite samples used in the present study were obtained...hb3gr for the 3iK (n, p) “Ar reaction and the meteorite Bjurhole for the ‘*‘I(n, -&) ‘**Xereaction. Thermal |  | Holland, G., Bridges, J.C., Busfield, A., Jeffries, T., Turner, G., Gilmour, J.D. (2005) Iodine-xenon analysis of Chainpur (LL3.4) chondrules. Geochimica et Cosmochimica Acta, 69 (1) 189-200 doi:10.1016/j.gca.2004.06.021 | Journal (article/letter/editorial) | | 1016/j.gca.2004.06.021 Iodine-xenon analysis of Chainpur (LL3.4) chondrules G. HOLLAND,1,* J. C. BRIDGES...Abstract—We present I-Xe analyses of ten chondrules from Chainpur LL3.4 by IR laser-stepped heating. Five chondrules...Shallowater. This confirms the extended range of Chainpur chondrule ages determined by previous data. We...more suitably explains the I-Xe systematics of Chainpur chondrules. Copyright © 2005 Elsevier Ltd employed...total 129Xe*/I is a macroscopic feature of the meteorite, whereas high-temperature 129 127 I/ I records |  | | Journal (article/letter/editorial) | | kindly provided material from the South Oman meteorite, and to Dr, Brian Mason who read the manuscript...aNl Rom, A. M. (1965) A chondrule in the Chainpur meteorite. 'Stiente, 149, 856-860. Fucns, L. H., C...(1966) Roedderite, a new mineral from the Indarch meteorite. Amer Mineral, 51. 949-955. HorsoN, G.Y.(927)...GeoI.Sun.Indin,60, 128 752. MesoN, B. (1966) The enstatite chondrites. Geochim.Cosmochim.Acta.,3O,23 39. |  | | Journal (article/letter/editorial) | | TECHNIQUES Reconnaissance studies of three UOCs (Chainpur [sections SAO 28,541, Krymka [SAO 121,and Tieschitz...analyzed m 24 chon. drules of the UOCs (10 in Chainpur, 5 in Krymka, and 9 in Tieschitz). Twenty-one...in all these chondrules were very nearly pure enstatite, containing typically -0.5 wt. W each of CaO and...peaks. Finally, as is the case for the CEPXs, Chainpur has the lowest-Fa olivine (0.20%) among the UOCs...C2 chondtites is not mirrored among the UOCs: Chainpur, Krymka and Tieschitz have differently shaped |  | | Journal (article/letter/editorial) | | the previous classification of the Chervettaz meteorite as an L5 equilibrated chondrite (Mason, 1963)...petrologic type 5 chondrites (Scott et al., 1986). The meteorite shows weak shock deformations indicating a shock...Cosmochim. Acta 31,1569-1582. LUGEON M. (1904) La meteorite du bois de la Chervettaz pres Chatillens, Bull...ALHA77043 ".""._. " "._-" _ " _." ". " "_ -."""_ " " Chainpur C2 core 64.7 0.13 23.5 0.31 1.3 n.d. 2.1 0.25...""" "" ' " --" . "'''-''''''''''''". . ",.",. Chainpur Cl 65.6 1.1 21.8 0.45 1.5 0.01 0.52 0.05 7.3 1 |  | | Journal (article/letter/editorial) | | five elements, H, C, N, 0 and determination of a meteorite 12C/“C ratio on graphite S, normally thought to...intervening period, there was only a minor interest in meteorite oxygen as various investigators wrestled with...(1953) attempted to measure hydrogen from an iron meteorite while BOATO (1953, 1954) reported deuterium enrichments...exploration of the extraterrestrial environment and meteorite studies amongst their most consuming interests...scale since it is the most abundant element) meteorite investigations are restricted by sample availability |  | | Journal (article/letter/editorial) | | pyroxene. 01 = otivine, Mw = magnesiowiistite. En = enstatite, Fs = ferrosilite, Eo = forsterite. Fa = fayaiite...residual liquid with a nucleation constraint of enstatite which drdes Porphyritic chondrules are the best...experimental constraints on the crystallization of enstatite can lead chondrules, because the phase relation...also suggested by BLASDER et al. (1976), can enstatite can begin to nucleate. This point correexplain...is oversaturated forsterite, but with enstatite. and enstatite can crystalet al. (1976) noticed that |  | Friedrich, Jon M., Weisberg, Michael K., Ebel, Denton S., Biltz, Alison E., Corbett, Bernadette M., Iotzov, Ivan V., Khan, Wajiha S., Wolman, Matthew D. (2015) Chondrule size and related physical properties: A compilation and evaluation of current data across all meteorite groups. Geochemistry, 75 (4) 419-443 doi:10.1016/j.chemer.2014.08.003 | Journal (article/letter/editorial) | | compilation and evaluation of current data across all meteorite groups Jon M. Friedrich a,b,∗ , Michael K. Weisberg.... . . . . . . . . . . . . . . . . . . . 3.2. Enstatite chondrites . . . . . . . . . . . . . . . . . ...compilation and evaluation of current data across all meteorite groups. Chemie Erde - Geochemistry (2014), http://dx...compilation and evaluation of current data across all meteorite groups. Chemie Erde - Geochemistry (2014), http://dx...compilation and evaluation of current data across all meteorite groups. Chemie Erde - Geochemistry (2014), http://dx |  | | Journal (article/letter/editorial) | | materials (see, e.g., [22,23]), which was applied for meteorite studies. Another option of precise measurements...appear with the fusion crust formation, when meteorite passes through the Earth atmosphere with a very...meteorites, such as carbonaceous chondrites, enstatite chondrites, and ordinary chondrites, are the most...millimeter-sized silicate aggregates found in the meteorite matrix. Carbonaceous chondrites are divided in...in several groups marked CI, CK, CH, CB, etc. Enstatite chondrites consist of two groups, marked EH, i |  | | Journal (article/letter/editorial) | | interpreted as being related to impact events on meteorite parent bodies where melting and reheating of proto...textures were also described from terrestrial meteorite impact craters (Grieve et aL, 1974). Independent...Independent evidence suggests that parent meteorite bodies also experienced extensive impact modifications (Kurat...a point analysis. Molecular endmembers, En = enstatite {MsSiOJ; Fs = ferrosilite (FeSiO,); Di = diopside...impact-related ejecta blankets. Evidence that meteorite parent bodies experienced similar impact histories |  | | Journal (article/letter/editorial) | | were made of replicate samples from the same meteorite. Various sources of error in the method, including...attempt to contrast self-consistent models of meteorite evolution. In these applications of meteoritic...analyses on different samples, even from the same meteorite, whether the data reflect either basic geochemical...experimental procedures follows. Sample Preparation Meteorite samples, of masses ranging from 14 to 1238 mg...these specimens are on loan from the Nininger Meteorite Collection at Arizona State University, through |
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