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| 1 »,••• Explanation of Plate XLII Island meteorite as at present restored. X Ia photograph. The position...to right of the page probably assumed by the meteorite in falling. Long From is that Field Columbian...Publication 64. Vol. Geological Series. I, No. METEORITE STUDIES— BY Oliver Cummings Farrington, Ph....Geology. Chicago, U. S. A. May, 1902. I. 11 METEORITE STUDIES— I. By Oliver Cumaungs Farrington. ...KANSAS. MUSEUM NUMBER Me. 420. of this great meteorite is possessed by the Museum been the case since |
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| Northern Ireland Lead from troilite of the Toluea iron meteorite l~. R. ~[ARSI[ALL* and D. C. HEss Enrico Fermi...composition of silver from troilite of the Toluca (Xiquipilco) iron meteorite was v e r y similar to that for terrestrial...troilite from the Canyon Diablo and H e n b u r y iron meteorites. The data on which t h a t statement... Lead was isolated from troilite from the Toluca meteorite in two ways. After the separation of silver...The simplest interpretation for the fact that the Toluca troilite lead is nearly as radiogenic as average |
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| Printed inNorthern Ireland Primitive lead from iron meteorites ROYAL R. MARSHALL* and JGRG FEITKNECRT~...analyses show that the Odessa iron meteorite, as well as the Toluca iron meteorite, contains the primeval lead...discovered in troilite from the Canyon Diablo and Henbury iron meteorites. However, significant variations of isotopic...these meteorites. Lead from the samples of Odessa meteorite has unusual amounts of Pbzos which increase with...composition found in different samples of this meteorite. There is no suggestion of transitions towards |
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| samples from Canyon Diablo, two troilites from Toluca, end single troilites from Bogou, Baquedano, Gibeon...It is concluded that the radiogenic lead found in iron meteorites is due to terrestrial contamination....PbB0*/Pbzs4 = 28.96. INTRODUCTION THE troilite phase of iron meteorites contains measurable quantities of lead...discovered that troilite from the Canyon Diablo meteorite contained lead with an isotopic composition more...the radiogenio lead found by previous workers in iron meteorites, it was considered advantageous to examine |
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| Augite, crystallization in tholeiites, 161 AUSTRALIA, iron ore minerals, M6ssbauer study, 209; QUEENSLAND,Condor...chondritic meteorites, 415; - - and BUCKLEY,H. A., Toluca meteorite, 413 EDGAR, A. D., and ARIMA, M., phlogopite...and OSrqCALD, J., Mfssbauer study of Australian iron ore minerals, 209 drumite, new mineral, 35; NORTHERNIRELAND...LANCUCKI,C. J., see SHAYAN,A., 407 Lannonite, New Mexico, new mineral, 37 Laurite erlichmanite series, chem...Zagr pluton, 365 Mrssbauer spectroscopy, Australian iron ore minerals, 209 Mundrabillaite, Western Australia |
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| Investigation of the Rhabdite/Kamacite Law of Intergrowth in iron meteorites with the aid of the Kossel technique...For that purpose, polished specimens of the Toluca meteorite have been analyzed after surface etching....This is found for the meteorite Toluca and a for a second sample, the meteorite Morasko. This behaviour...electron microscope investigations. INTRODUCTION In iron meteorites, the P content ranges from 0.01-0.02...1980;Dean and Goldstein, 1986). The main phases of iron meteorites, taenite y-(Fe,Ni) and kamacite a-(Fe |
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| ratios in an iron meteorite could be made by neutron-capture reactions in the iron meteorite, the fluxes...thermal and epithermal neutrons in a large iron meteoroid, Toluca, were calculated using Monte Carlo particle...those observed in terrestrial samples relative to iron meteorites, indicating a non-cosmogenic origin of...q 1997 Elsevier Science B.V. Keywords: tungsten; iron meteorites; isotope ratios; neutrons 1. Introduction...indicate the 182 Wr 183 W ratio in the Toluca iron meteorite is decreased by Ž3.9 " 1.0. = 10y4 relative |
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| XENON IN THE INCLUSIONS OF CANYON DIABLO AND TOLUCA IRON METEORITES E. C. ALEXANDER Jr. and O. K. MANUEL...silicate inclusion of Toluca. The existence of large 129rXe anomalies in iron meteorites is confirmed...coexisting mineral phases o f a silicate inclusion of Toluca. Fleischer et al. [2] have calculated formation...95 to 830 m.y. for various silicate minerals in Toluca using the fossil fission tracks attributed to 244Pu...analyse the xenon from some of the inclusions o f Toluca. These analyses were also undertaken in order to |
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| green, chromium-bearing mineral in the Toluea iron meteorite, and n a m e d it " k o s m o c h l o r " ...found a similar emerald green mineral also in the iron meteorites from Coahuila and H e x River Mountains...original "kosm o c h l o r " of Laspeyres in the Toluca meteorite and confirmed from X-ray, optical and electron-probe...mineral is similar to the green mineral in the Toluca meteorite. More recently Coes (1955) synthesized the...with small amounts of Cr in the iron meteorites from Coahuila or Toluca. The crystallization of blue chromian |
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| Examination of cotype cosmochlore from the Toluca meteorite confirms Laspeyres's observations (1897) in...every respect, except that what he determined as iron was largely titanium. His data are completed by...isolated from the Toluca meteorite by Laspeyres (1897), who obtained 73 mg from 585 g of the iron; his name,...chromium silicate found in three meteorites, including Toluca. They rejected Laspeyres's name 'since its identity...essentially the same physical properties in the same meteorite far more unlikely), and because 'The name itself |
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| individual chondri can easily be isolated, but if the meteorite is at all coherent the chondri break with the...plainly marked FIG. 7.-Section of the Homestead meteorite, showing a typical eccentricallyradiating bronzite...bronzite augite, plagioclase, glass, and nickel-iron. This order, it is to be noted, is also that of...individuals. Such a rim is often dark from a content of iron and troilite. Chromite, either in minute grains...the large 1 FIG. 8.-Section of the Dhurmsala meteorite, showing a large, somewhat porphyritic chondrus |
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| Mn23 C6 and Cr23 C6 ). X-ray Powder Pattern: Toluca meteorite. 2.356 (s), 2.151 (s), 1.863 (m), 1.242 (m)...18 4.91 [5.4] Total [100.0] (1) Canyon Diablo meteorite; by electron microprobe, C by difference, Cr and...and Cu each less than 0.05%. Occurrence: In iron meteorites and carbonaceous chondrites. Association:...Distribution: From the Toluca, Canyon Diablo, Edmonton (Kentucky), Tazewell, and many other iron meteorites, characteristic...D. (1971) New carbide, (Fe, Ni)23 C6 , found in iron meteorites. Nature, Physical Science, 229, 61–62 |
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| COMP., AMSTERDAM I-Xe DATING OF SILICATES FROM TOLUCA IRON E. C. ALEXANDER, Jr., B. SRINIVASAN and 0....experiment on neutron irradiated silicates from Toluca indicates that the high temperatures sites began...was (1.4 kO.4) x 10-3. This ratio suggests that Toluca silicates formed 652 million years before the chondrites...total xenon and iodine contents in Toluca silicates [3] and in other iron meteorites [4-71 yield 12gI/1271...12gI/1271 ratio in the high temperature sites of an iron meteorite. Two requirements essential to measuring the |
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| Northern Ireland The isotopic composition of silver in iron meteorites* V. RAMA MURTHY School of Science and...silver were extracted from the troilite of Toluca iron meteorite and the metal phases of Sikhote Alin and...anion-exchange techniques. Isotopic analysis of silver in iron meteorites indicates a 2-3 per cent higher Ag107/Aglog...and the fo~at~on of iron meteorites is indicated. The silver isotopic anomaly in iron meteorites appears...radioactivity as the heat source in the early history of meteorite parent bodies becomes a definite possibility. |
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| IRON METEORITES OF GROUP IA AND IIA: STUDY OF PHOSPHIDE MORPHOLOGY ENHANCED BY DRY CI2 ETCHING A.J. Easton...described for etching iron meteorites by heating at 350°C in dry chlorine gas. Iron is volatilized from...from low-nickel iron phases, e.g. kamacite, and the residual non-volatile chlorides are removed by solution...restricted to either group. INTRODUCTION Etching of iron meteorites has been previously restricted to either...electro-chemical treatment of a portion of the meteorite (Tackett et al., 1966). Various mixtures of nitric |
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| and the cooling of the parent body of the Toluca meteorite R. L. FLEISCHER,P. B. PRICE and R. M. WALKER*...silicate minerals from inclusions in the iron meteorite Toluca. If most of these tracks are assumed to...more extensive data on one of those meteorites, Toluca, which allows a more complete case to be made....type, the variations in track density within the meteorite body, and the track production induced in the...silicate minerals from inclusions in the Toluca iron meteorite (piece 22a of the Harvard collection). Column |
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| Mineralogy and Petrology of Silicate Inclusions in Iron Meteorites T. E. B v ~ c ~ Space Sciences Division...Meteoritics, The University of New Mexico, Albuquerque, New Mexico 87106 E. OLSEN Department of Geology...Sphalerite 318 4.2.7. Phosphates 318 4,2.8. Nickel-Iron 318 4,2.9. Copper 318 4.3 Weekeroo Station-Type...References 337 Abstract. Silicate inclusions in 17 iron meteorites have been analyzed by the electron microprobe...between kamacite in inclusions and kamacite of the iron host, and the relict chondrules found in Netscha~vo |
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| meteorites closely resemble terrestrial rocks. The meteorite of Juvinas, for instance, so far as the above...concerned, is similar to a basalt, while many of the iron meteorites find a perfect analogue in the terrestrial...Juvinas meteorite is to be found among terrestrial basalts, nor does the terrestrial nickel-iron show satisfactorily...Widmanstditten figures so characteristic of the iron meteorites. It is along this line of study that...stony. The metallic matter is chiefly an alloy of iron and nickel, the stony matter chiefly the silicates |
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| 19th century by Laspeyres (1897) in the Toluca iron meteorite (octahedrite) and was called kosmochlor...decades later, kosmochlor was found in two more iron meteorites (hexahedrites), Coahulia and Hex River...mineral. Kosmochlor was thought to be exclusively a meteorite mineral for a long time. Moreover, its formation...the Italian Alps and in a jadeite artefact from Mexico. Kosmochlor (up to 54 mol.% Kos) was also found...augite. The Di–Kos join is characteristic of meteorite pyroxenes; a similar composition was inferred |
 | Sanloup, Chrystèle, Blichert-Toft, Janne, Télouk, Philippe, Gillet, Philippe, Albarède, Francis (2000) Zr isotope anomalies in chondrites and the presence of 92 Nb in the early solar system. Earth and Planetary Science Letters, 184 (1) 75-81 doi:10.1016/s0012-821x(00)00306-x | Journal (article/letter/editorial) |
| subsequently found in Nb-rich rutile from two iron meteorites, Toluca, with O92 Zr = 9.1 þ 1.7 (TIMS) [1], and...Table 1 Measured values of O92 Zr and O96 Zr in meteorite samples Sample Class O92 Zr O96 Zr Allende...representing the chondrites. The di¡erence in slope for Toluca and Allende CAIs gives an age of 225 Myr incompatible...previously published data on the Toluca meteorite [1] and dividing Eq. 1 for Toluca by the same equation for...ZrToluca ratio: ! Nb=Zr 1 O Toluca f All: i 2 U Nt ln V O All: i f Nb=Zr Toluca We obtain a value Nt of |
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| Uranium in the silicate inclusions of stony-iron and iron meteorites GHISLAINE CROZAZ,SCOIT F. SIBLEY*...eleven mesosiderites, seven pallasites and four iron meteorites with silicate inclusions. When concentrated...variable from meteorite to meteorite and sometimes also exhibit variations in the same meteorite. Uranium...extension of this study to twenty-one stony-iron and iron (with silicate inclusions) meteorites. The original...motivation of this work was to identify in a given meteorite as many U-rich phases as possible which could |
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| cgraphitic’ carbon from iron meteorites and some remarks on the troilitic sulfur of iron meteorites PETER ...inclusions and finely dispersed carbon from twelve iron meteorites has been studied. The analyses are given...coarse octahedrites, obtained by dissolving the meteorite, shows distinctly lighter isotopic compositions...contained in carbides or in solid solution in the nickel-iron. Graphite inclusions showing Cl3 concentrations...isotopic composition may not be identical for all iron meteorites. The large variability in the Cl3 concentration |
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| different ways, depending on the history of the meteorite. A mineral will begin to record fission tracks...from the Nakhla meteorite. This is in contrast to gas-retention ages for this meteorite of typically c...BHANDARIet al. (1971) suggested that diopside of this meteorite contained significant fission-track densities...re-evaluation of the fossil-track record in this meteorite was thought to be necessary. FLEI~CHERet al. (1967b)...different mineral phases from a silicate inclusion. METEORITE SAMPLES AND EXPERIMENTAL PROCEDURE Samples of |
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| chondrites and ~aphi~troili~ or troilite nodules from iron meteorites) were fractionated by silica gel chromatography...of the lower molecular weight alkanes in a few meteorite samples (Orgueil and Mokoia) showed a predominance...hydrocarbons from tho graphitic-troilitic nodules of iron meteorites were similar to those of Type II and...NOONER and J. 0~6 CONTENTS Abstract Introduction Meteorite samples Methods Results-Carbonaceous chondrites...meteorites Non-carbonaceous chondrites Nodules of iron meteorites Discussion Conclusions Acknowledgements |
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| X-ray diffraction data for schreibersite grains from iron meteorites Acuña, Carlton, Hex River Mts. (three...Odessa (two different crystals), Sikhote Alin, and Toluca aiming for the determination of the absolute structure...structure assignment. The single crystal extracted from Toluca is, however, of poor quality and consequently the...grains, one taken from Odessa iron and the other from the Hex River Mts. meteorite, reveal the dominance of...structure Æ Crystal structure Æ X-ray diffraction Æ Iron meteorites Introduction Phosphides of Fe3P–Ni3P |
Toluca meteorite, Jiquipilco, Mexico, Mexico