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| CLINOBRONZITE EVOLUTION AND THE THERMAL OF THE STEINBACH METEORITE ARCH M. REID, RICHARD J. WILLIAMS and HIROSHI...version received February 18, 1974 Steinbach is a stony-iron meteorite with approximately equal amounts...assemblage orthobronzite-protobronzite-tridymite-metallic iron indicates an equilibrium temperature of 1200°C and...the 700-500°C range. 1. Introduction The Steinbach meteorite was found in 1724 but may have fallen around...Heide [2] described this unique meteorite that consists of nickel iron and silicate in approximately equal |
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| August 2019 Editor: R. Dasgupta Keywords: Steinbach meteorite Pb-Pb chronology Al-Mg isotopes accretion...planetary embryo a b s t r a c t Group IVA iron and siliate-iron meteorites record a large range of cooling...Al-Mg ages for the Group IVA silicate-iron Steinbach meteorite. A Pb-Pb age based on multiple fractions...late-phase, slowly-cooled orthopyroxene from Steinbach yields an absolute age of 4565.47 ± 0.30 Ma corresponding...U-corrected Pb-Pb absolute age for a differentiated meteorite. We use the deficit Al-Mg dating method on one |
 | Bryson, James F.J., Weiss, Benjamin P., Harrison, Richard J., Herrero-Albillos, Julia, Kronast, Florian (2017) Paleomagnetic evidence for dynamo activity driven by inward crystallisation of a metallic asteroid. Earth and Planetary Science Letters, 472. 152-163 doi:10.1016/j.epsl.2017.05.026 | Journal (article/letter/editorial) |
| II, Albert-Einstein-Strasse 15, Berlin 12489, Germany b a r t i c l e i n f o Article history: Received...2017 Editor: B. Buffett Keywords: meteorite paleomagnetism iron meteorite cloudy zone X-ray photoemission...matrix metal and silicate inclusions within the IVA iron meteorites. This family of meteorites has been suggested...We find that the different components in the IVA iron meteorites display a range of paleomagnetic fidelities...depending crucially on the cooling rate of the meteorite. In particular, silicate inclusions in the quickly |
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| given in this paper. One specimenis of the meteorite from Steinbach, Germa.ryt (Harvard University l'Ieteorite...ol refraction is still not 1 The Steinbach meteorite is a stony-iron (siderophyre) and has several synonyms...(prior, G. T., 1953).The tridymite from this meteorite r,r'asoriginally describedas asmanite (Story-Maskelyn...016 0.12 0.08 trace 1 Tridymite from the Steinbach Meteorite. Analyst Jun Ito, Department of Geological...68"+ 5" 2.26 t0.01 1 . Tridymite from the Steinbach meteorite. L. Tridymite from Mule Springs near Lakeview |
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| Saxon frontier or indeed from Eittersgriin, in Saxony, where a mass closely resembling it was almost...1751 at Steinbach, a village about midway between Breitenbach and Eittersgriin, a meteorite in all respects...which occurred at Whitsuntide, 11G4, in Saxony, when a mass of iron fell near the town of Meissen. A polished...patches of nickel-iron, the interspaces being partly filled with small patches of iron sulphide, the greater...by Eumler in the case of the silicates of the Steinbach siderolite. The composition of the bronzite, as |
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| Cation ordering in orthopyroxenes from two stony-iron meteorites: Implications for cooling rates and metal-silicate...orthopyroxene crystals from two group IVA stony iron meteorites—Steinbach (ST) and São João Nepomuceno (SJN)—...metals in SJN, which implies that if this stony iron were subjected to slow cooling, it must have been...studies of the disordered clinobronzite in the ST meteorite by using electron diffraction and high-resolution...in 1. INTRODUCTION Steinbach (ST) and São João Nepomuceno (SJN) are stony iron meteorites consisting |
 | Ulff-Møller, Finn, Rasmussen, Kaare L., Prinz, Martin, Palme, Herbert, Spettel, Bernhardt, Kallemeyn, Gregory W. (1995) Magmatic activity on the IVA parent body: Evidence from silicate-bearing iron meteorites. Geochimica et Cosmochimica Acta, 59 (22) 4713-4728 doi:10.1016/0016-7037(95)00318-5 | Journal (article/letter/editorial) |
| IVA parent body: Evidence from silicate-bearing iron meteorites FINN ULFF-M_~LLER,I KAARE L. RASMUSSEN...3Max-Planck-Institut for Chemie, Saarstrasse 23, D-6500 Mainz, Germany aInstitute of Geophysics and Planetary Physics...A b s t r a c t - - F o u r of the magmatic IVA iron meteorites contain tridymite or clinobronzite-o...which are quite unlike silicate assemblages in other iron meteorites. The textures, the bulk chemistry, and...the range 1400-1350°C was inferred for the Steinbach meteorite from the estimated distribution coefficient |
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| silicate-metal mixing in the parent of the IVA iron and stony-iron meteorites body EDWARD R. D. SCOTT, HENNING...silicate phases in the IVA iron meteorites and two related stony irons, Steinbach and Sgo JoHo Nepomuceno...IIIAB. Compositions of the metal fractions in Steinbach and SBo Jo&o Nepomuceno match the calculated solid...but these occurrences seem unrelated to the stony-iron silicates. Because of the difficulty in forming...al. ( 1995) to account for the fast cooling of Steinbach from 1200°C. 1. INTRODUCTION who found a wide |
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| modification, Raman spectroscopy, Phase identification, Meteorite INTRODUCTION Tridymite has many modifications...comparison, tridymite in Steinbach iron meteorite (IVA–an) was also measured. This meteorite contains silicate...tridymite and orthopyroxene. Tridymite in this meteorite is MC and has been used in previous studies (e...sample. The spectrum of tridymite (MC) in Steinbach meteorite is shown in Figure 2 (top) and is essentially...sample). Major Raman peak positions for both Steinbach meteorite and the synthetic MC are listed in Table |
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| Chicago press, Chicago, 314 p. Mouer, M. M. (1962) Iron bacteria, particularly those of lhe Sphaeroti,hnLeptothria...Tridymite, Haraiya 5. Tridymite, Steinbach eucrile. meteorite (Crant' 1967). to the lunar basalts...of tridymite from the Steinbach meteorite, a unique type consisting of nickel-iron, orthopyroxene (Fs1s)...15085contains3.07 percentTiO2, the Mt. Padbury meteorite 0.30percent,and the Haraiya meteorite0.57percent)...tridymite and cristobalite.The practical absence,of iron, manganese,and magnesiumindicates that these elementsare |
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| occurrences a rapid crystallization or cooling of the meteorite substance is strongly indicated. Like the glass...form of chromite, FeO,Cr2,O. meteorites in iron and iron-stone the mineral is not so abundant 522 THE...usually left as a residue on treatment of the meteorite with acid. This residue sometimes amounts to from...amount is likewise found after dissolving many of the iron meteorites. These residues on being heated in air...considered it similar in origin to the graphite of iron meteorites and Weinschenk believes it similar to |
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| orthopyroxene crystal (Fs23) from the Johnstown meteorite, which was annealed at several temperatures between...orthopyroxene from two samples of stony-iron (type IVA) meteorites, Steinbach and SaÄo JoaÄo Nepomuceno (Haack...selected crystals from SaÄo JoaÄo Nepomuceno (Fs14), Steinbach (Fs15) and granulite (Fs49) were labeled SJN(23...with a physically separated mixture of wuÈstite and iron, in a silica tube in the presence of a ¯owing Ar...crystallized at fO2 conditions within the ®eld of metallic iron. For the terrestrial granulite sample HO28, the |
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| 550–750C, oxygen fugacity between quartz–fayalite– iron and Ni–NiO buffers, and at compositions of 16 and...good agreement for Alpoor samples with intermediate iron content, when the Mössbauer data are corrected...concentration of point defects by redox reaction of iron. Thus, we expect that the rate constant for the...and X at fO2 of 0.8 log unit above the wüstite-iron (WI) buffer. They used only the data of Besancon...fO2 conditions corresponding to those of wüstite–iron (WI) buffer, and retrieved the Arrhenian parameters |
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| 0016-7037(95)00194-8 The thermal evolution of IVA iron meteorites: Evidence from metallographic KAARE ...Abstract-Metallographic cooling rates of group IVA iron meteorites have been recalculated based on the most...cooling rates of iron me- Group IVA is not only the third largest group of magmatic iron meteorites, it...least understood. In contrast to other magmatic iron meteorite groups for which a core origin is inferred...group IVA is the four silicate bearing meteorites Steinbach, S5o Jolo Nepomuceno, Gibeon, and Bishop Canyon |
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| 2003.08.016 Oxygen isotopic compositions of IVA iron meteorites: Implications for the thermal evolution...isotopic compositions of silicate inclusions in IVA iron meteorites have been measured with an in situ UV...similarity between IVA irons and L/LL chondrites. Steinbach and São João Nepomuceno, containing inclusions...bronzite in the same sample slabs or clusters in Steinbach and São João Nepomuceno. The fractionations...is consistent with a fairly rapid cooling of Steinbach above 1000°C based on the equilibrium of its mineral |
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| 38-48. Wrlr-rerus, K. L. (1965) Determination of the iron content of sphalerite ltcon. Geol , 6O, 174U7 -(1967)...given in this paper. One specimenis of the meteorite from Steinbach, Germa.ryt (Harvard University l'Ieteorite...ol refraction is still not 1 The Steinbach meteorite is a stony-iron (siderophyre) and has several synonyms...(prior, G. T., 1953).The tridymite from this meteorite r,r'asoriginally describedas asmanite (Story-Maskelyn |
 | Haack, Henning, Scott, Edward R.D., Love, Stanley G., Brearley, Adrian J., McCoy, Timothy J. (1996) Thermal histories of IVA stony-iron and iron meteorites: Evidence for asteroid fragmentation and reaccretion. Geochimica et Cosmochimica Acta, 60 (16) 3103-3113 doi:10.1016/0016-7037(96)00139-1 | Journal (article/letter/editorial) |
| SOO16-7037( %)00139-l Thermal histories of JYA stony-iron and iron meteorites: Evidence for asteroid fragmentation...investigated the thermal history of the IVA iron and stony-iron meteorites to help resolve the apparent conflict...the disordered clinobronzite in the stony-iron, Steinbach, using electron diffraction and high resolution...resolution imaging techniques indicates that this meteorite was rapidly cooled at =lOO”C/hr through 1200°C...after the impact was 450-700°C. We infer that Steinbach cooled rapidly from 1200°C at the edge of a core |
 | Taylor, G.J, Keil, Klaus, Berkley, J.L, Lange, D.E, Fodor, R.V, Fruland, R.M (1979) The Shaw meteorite: History of a chondrite consisting of impact-melted and metamorphic lithologies. Geochimica et Cosmochimica Acta, 43 (3) 323-337 doi:10.1016/0016-7037(79)90198-4 | Journal (article/letter/editorial) |
| The Shaw meteorite: history of a chondrite consisting of impact-melted and metamorphic lithologies G...kilometers In diameter on Its meteorite parent hod! 1. INTRODUCTION SHAW meteorite has a bulk composition...texture and report11 IS depleted in metallic nickel-iron and troilite (FREDRIKSSON and MASON. 1967). The...geothermometry (ONUMA et al.. 1972) indicates that the meteorite experienced temperatures of up to 1300 C. Also...Also. DODD er (I/. (1975) reported that the meteorite has two low-Ca pyroxenes of 0.5 and 2.5 WI”,, CaO |
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| Metallographic cooling rates and origin of IVA iron meteorites Jijin Yang a,*, Joseph I. Goldstein a...protoplanet during a grazing impact. Other large magmatic iron groups, IIAB, IIIAB, and IVB, also show significant...Elsevier Ltd. All rights reserved. 1. INTRODUCTION Iron meteorites are studied for the insights they offer...asteroids, which are otherwise unrepresented in our meteorite collections. They also complement what we learn...(Bizzarro et al., 2005;Hevey and Sanders, 2006). Iron meteorites are also of interest because they may |
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| IVA meteorite parent body: Clues from pyroxene geochemistry in the Steinbach stony-iron meteorite Alex...Alex RUZICKA* and Melinda HUTSON Cascadia Meteorite Laboratory, Department of Geology, Portland State University...October 2006) Abstract–We analyzed the Steinbach IVA stony-iron meteorite using scanning electron microscopy...crystallized over an extensive fractionation interval. Steinbach probably formed as a cumulate produced by extensive...disruption appears best able to explain the data for Steinbach and other IVA meteorites. Impact disruption occurred |
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| tridymite opals (range 0.001 to 0.007 percent). Iron was presentin all opalsstudied(range0.005 to 2.25...of orthorhombic high tridymite from the Steinbach meteorite. Ac ta C ry stallogr. 23, 617-623. Dwvrn |
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| Buchwald: Microhardness of iron meteorites . Vo Fo Buchwald: Zerhamra, a new iron meteorite find from Sahara T...Milton, A. Dube and M. S. Balasundaram: The Lonar meteorite crater, India L. H. Fuchs and E. Olsen: Composition...coexisting pentiandite and awaruite in the Allende meteorite Glenn I Huss and Ivan E. Wilson: A census of the...Mireille Christophe Michel-Levy: The Washougal meteorite . . . . . . . . . . . . . . . . . . . . . . ....Carleton B. Moore: The determination of zinc in iron meteorites U. Krahenbuhl, J. W. Morgan, R. Ganapathy |
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| separated mixtures of iron and wüstite in an Ar atmosphere. After heating, the presence of iron and wüstite was...Mössbauer spectroscopy appears to overestimate M2 iron in Ca-richer pyroxene samples, as discussed by Dowty...of cation ordering and application to the Steinbach meteorite. Experimental determination of thermodynamic...(1991) Iron-magnesium order-disorder in an orthopyroxene crystal from the Johnstown meteorite. Earth...Thermal and deformation history of the Shergotty meteorite deduced from clinopyroxenes microstructure. Geochimica |
 | BOESENBERG, Joseph S., DAVIS, Andrew M., PRINZ, Martin, WEISBERG, Michael K., CLAYTON, Robert N., MAYEDA, Toshiko K. (2000) The pyroxene pallasites, Vermillion and Yamato 8451: Not quite a couple. Meteoritics & Planetary Science, 35 (4) 757-769 doi:10.1111/j.1945-5100.2000.tb01460.x | Journal (article/letter/editorial) |
| compositions also differ from those of I A B and IIIAB iron meteorites. Rare earth element (REE) patterns in...and Yamato (Y)-845 1. Vermillion is a 34.36 kg meteorite from central Kansas, found in 1991 and recognized...of chromite present as intergrowths with augite. Iron-Nickel Metal-Vermillion and Y-845 1 have fine to...Y-8451 metal has been altered to a brown limonitic iron oxide in many areas (Yanai and Kojima, 1995), particularly...groups, acapulcoiteslodranites, and IAB and IIICD iron meteorites. The pyroxene pallasites (A170 = -0.76) |
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| are inverted pigeonite from the Serra de Mage meteorite (Harlow et aI., 1979; Harlow, 1980) and lunar...Weekeroo station: planetary differentiates in an iron meteorite. Lunar and Planetary Science, X, 376-377. Harlow...cIinobronzite and the thermal evolution of the Steinbach meteorite. Earth and Planetary Science Letters, 22 |
