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| MAGNETIZATION AND THERMOMAGNETIC OF THE ALLENDE PROPERTIES METEORITE Robert F. BUTLER* Department of Geophysics...Paleomagnetic examination of a l-kg specimen of the Allende meteorite has revealed the existence of natural remanent...original accretion or post-accretion reheating of Allende. Paleointensity determinations on three samples...analysis indicates that the ferromagnetic minerals in Allende consist of 95 wt% taenite containing 67% Ni plus...chondrites. The Allende meteorite shower occurred in February 1969 over northern Mexico. Preliminary petrologic |
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| com/locate/epsl Magnetization of Extraterrestrial Allende material may relate to terrestrial descend Gunther...3 February 2018 Editor: J. Brodholt Keywords: Allende magnetic dynamo paleomagnetism bolide decelerating...a b s t r a c t The origin of magnetization in Allende may have significant implications for our understanding...magnetic Allende data may contain information that could constrain the magnetic history of Allende. The measurements...measurements on Allende chondrules reveal an existence of magnetization component that was likely acquired |
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| RELATIONS OF SULFIDE, SULFATE AND SULFUR IN ORGUEIL METEORITE Manuel N. Bass NASA Manned Spacecraft Center...Center, Houston. Hexagonal plates of monoclinic pyrrhotite in Orgueil are concentrated in the interstitial...phyllosilicates during a fragmentation process. The pyrrhotite composition (FeO.87S from x-ray d-values) lies...bounding the high-sulfur side of the monoclinic pyrrhotite stability field and suggests the presence or...inversion from high-temperature hexagonal pyrrhotite. Pyrrhotite, either monoclinic or hexagonal, may have |
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| in USA Organic compounds in the Murchison and Allende carbonaceous chondrites studied by photoionization...Abstract-Organic compounds in the Murchison (C2M) and Allende (CV3) carbonaceous chondrites were analyzed by...anthracene and fluoranthene) in the Murchison meteorite were determined to be 9 and 12 lLg/g, respectively...sector mass analyzer) of 20-40 mg ofthe same meteorite material were obtained to verify that the 118...REPORT THE FIRST ANALYSES of the Murchison and Allende meteorites by SALI (surface analysis by laser ionization; |
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| com/locate/gca Experimental aqueous alteration of the Allende meteorite under oxidizing conditions: Constraints on...Planetary Sciences, MSC03-2040, University of New Mexico, Albuquerque, NM 81731, USA Received 26 January...experimental study of the aqueous alteration of the Allende CV3 carbonaceous chondrite under highly oxidizing...in order to examine the alteration behavior of Allendes anhydrous mineralogy. The experiments were carried...ratios ranging from 1:1 to 9:1. Uncrushed cubes of Allende were used so that the spatial relationships between |
 | Muxworthy, Adrian R., Bland, Phillip A., Davison, Thomas M., Moore, James, Collins, Gareth S., Ciesla, Fred J. (2017) Evidence for an impact-induced magnetic fabric in Allende, and exogenous alternatives to the core dynamo theory for Allende magnetization. Meteoritics & Planetary Science, 52 (10) 2132-2146 doi:10.1111/maps.12918 | Journal (article/letter/editorial) |
| magnetic fabric in Allende, and exogenous alternatives to the core dynamo theory for Allende magnetization...paleomagnetic study of the matrix of Allende CV3 chondritic meteorite, isolating the matrix’s primary remanent...magnetic mineral was found to be pyrrhotite. Given the thermal history of Allende, we conclude that the remanent...excursions are brief. We extend this work to model Allende, and show that a 1 km/s planar impact generates...possible that the origin of the magnetic field in Allende was the impact itself, or a nebula field recorded |
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| Chondrules and refractory inclusions in Mokoia and Allende are broadly similar in texture and mineral chemistry... and melilite-rich CAI’s are more abundant in Allende. We think that most CAI’s formed during the metamorphism...nebula. The Ca, Al-rich inclusions (CAI’s) in the Allende CV3 chondrite have been extensively and repeatedly...metamorphosed than Allende. are systematically described and classified, and compared with those in Allende. The present...embedded in fine-grained, opaque, carbonaceous meteorite matrix. Very few objects in Mokoia meet the criterion |
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| and the Allende meteorite fell in Mexico, CV3 chondrites have played a major role in meteorite studies...more primitive than other chondrites, and because Allende contains numerous large, seemingly pristine and...carbonaceous chondrite fall, Allende quickly became the most widely studied meteorite, a title it still holds...holds today. Initially, studies of CAIs from Allende appeared to validate the recently developed equilibrium...metallic Fe,Ni and magnetite. McSween suggested that Allende, an oxidized CV3 chondrite, had experienced mild |
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| re\erred Noble-gas-rich separates from the Allende meteorite ULRICH OTT* Department of Physics. University...carbonaceous. HFIHCI-resistant residues from the Allende meteorite were studied before and after applying physical...In addition, HF!HCI demineralization of bulk meteorite resulted in similar fractional losses of C and...trapped noble gases in acid-resistant residues from Allende. -the main host phase for ‘anomalous’ gas in the...what fraction of the carbonaceous material in Allende consists of noble gas host phases: and the possibility |
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| identification has elucidated many aspects of meteorite formation. Of particular interest are five phosphate...calcium- and aluminum-rich silicates in the Allende meteorite, a Type 1II carbonaceous chondrite which fell...(Mason, 1962), when I wrote an account of the meteorite minerals then recognized, see Table 1, the list...*Barringerite *Perryite *Carlsbergite *Sinoite Pyrrhotite Mackinawite Heazlewoodite *Niningerite Alabandite'...s Ti0 2 Formula Accessory in Odessa iron and Allende (CellI) Rare, in ureilites Rare, in ureilites Accessory |
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| only negligible to relatively mild heating in meteorite parent bodies. Thus, the study of chondrule rims...microscopically in transmitted and reflected light: Allende, CV3 (USNM 4744-l and 4744-2, LC 130 and 131);...chondrules in Allende, Vigarano and Leoville; one radial pyroxene chondrule in Allende is surrounded...(Fig. If). One isolated 300 pm olivine grain in Allende and one isolated 350 pm “dusty olivine” grain (NAGAHARA...198 I, FIG. 1. Coarse-grained chondmle rims in Allende; a-e: transmitted light; f: crossed nicols. (a) |
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| Netherlands [61 IRON-NICKEL SULFIDES IN THE MURCHISON METEORITE AND THEIR RELATIONSHIP TO PHASE Q1 JOHN F. KERRIDGE...January 2, 1979 Pentlandite from the Murchison meteorite survivesHF-HCIattack and dissolvesin HNO3 at room...taking the residue following dissolution of the meteorite in HF-tJC1 and treating it with HNO3; Q dissolves...it has been shown that Q, at least in the Allende meteorite, consists of two phases; Q 1, soluble in cold...g. [6,7] .) Although originally discovered in Allende [2], Q (i.e. a gas-rich, HF-HCl-resistant residue) |
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| com/locate/epsl No nebular magnetization in the Allende CV carbonaceous chondrite R.R. Fu ∗ , E.A. Lima...randomly oriented magnetization in chondrules in the Allende CV carbonaceous chondrite. However, it has recently...realized that most of the ferromagnetic minerals in Allende are products of secondary processes on the parent...reevaluate the pre-accretional magnetism hypothesis for Allende using new paleomagnetic analyses of chondrules...from within individual chondrules. We confirm that Allende chondrules carry a high-temperature component of |
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| org REE abundances in the matrix of the Allende (CV) meteorite: Implications for matrix origin Mutsuo...specimens from the polished sections of the Allende (CV) meteorite. Analysis of rare earth element (REE),...alkali metals (K, Rb) in the specimens of the Allende matrix studied here are nearly CI (carbonaceous...Eu/Eu* = 0.98– 1.10). The REE features of the Allende matrix do not indicate a direct relationship with...chondrules or CAIs. Therefore, we infer that the Allende matrix retains the REE features acquired during |
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| origin of refractory-metal-rich in a Ca,Al-rich Allende inclusion assemblages H. PALME,’ I. D. HUTCHEON...(Ir, OS, Ru, Pt, etc.) were separated from the Allende Egg 6 Ca, Alrich inclusion (Type Bl ). Instrumental...refractory metals, typical of coarse-grained CAIs from Allende. The combined study of OAs and the parent Egg 6...concentrated in MO&. The two major sulfide phases, pyrrhotite and pentlandite, have less than 0.04% of any...grained, Ca,Al-rich inclusions (CAIs) from the Allende meteorite is the high content of refractory lithophile |
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| that some regions of this apparently brecciated meteorite may be subtype 2.9. The suite of CAIs in Paris...2014). However, in oxidized CV3 falls such as Allende, many CAIs (e.g., Wark 1981; Krot et al. 1995)...(BSE) images of typical regions of the Paris meteorite. RESULTS Petrography Paris appears to be brecciated...might be a fresh fall, there is evidence that the meteorite has experienced moderate terrestrial weathering...the petrologic and geochemical features of this meteorite to those of other CM chondrites whose aqueous |
 | Blum, Joel D., Wasserburg, G.J., Hutcheon, I.D., Beckett, J.R., Stolper, E.M. (1989) Origin of opaque assemblages in C3V meteorites: Implications for nebular and planetary processes. Geochimica et Cosmochimica Acta, 53 (2) 543-556 doi:10.1016/0016-7037(89)90404-3 | Journal (article/letter/editorial) |
| environments. INTRODUCTION landite with minor pyrrhotite, magnetite and Ca-phosphate (Fig. 5). The major...magnetite (Fe304), pentlandite [(Fe,Ni)gSs], pyrrhotite (Fel-xS) and Ca-phosphate [Ca3(PO4)2 or Cas(PO4)3...chondrites were chosen for study. They are from Allende samplesJIM (BRAWDSTXTTERand KURAT, 1983), USNM..."EGG3-OA1" and "LE0575-OA1", respectively.The Allende meteorite belongs to the "oxidized subgroup" of C3V...of ~30 am and consists of the phases 7Ni-Fe, pyrrhotite, ~Ru-Fe,Ca-phosphate, molybdenite and magnetite |
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| 1356-1362, 1991 Euhedral awaruite in the Allende meteorite: Implications for the origin of awaruite-...a low-FeO porphyntic olivine chondrule in the Allende CV3 carbonaceouschondrite is comprised of 9 vol0/o...Complex in Pakistan (Ahmed and drites such as Allende (Haggerty and McMahon, 7979; Bevan, l98l). Grain...those in Alafter anhedral magnetite and pentlandite (de Quervain, lende (Rubin et al., 1988).Haggertyand...reported occurrenceofeuhedral awa- examined > 1000 Allende chondrules in thin section: in Ir.lrnonucrroN |
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| siderophile element-rich opaque assemblages in an Allende inclusion PAUL J. SYLVESTER,~ BRIANJ. WARD,’ LAWRENCEGROSSMAN... or Frcmdlinge, weighing 0.17- 19 pg, from an Allende Type B, Ca-, Al-rich, coarse.-grained inclusion...pristine condensates. A study of 11 Fremdlinge in 3 Allende CAB found no evidence for isotope anomalies in...with similar mineralogy have been observed in Allende, and we conline our arguments to metal-, oxide-...activation analyses (INAA) of bulk Fremdlinge from an Allende CA1 and, through thermodynamic modeling, attempt |
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| Ni-rich sulphides (including pentlandite, pyrite, pyrrhotite and monosulphide solid solution), and (c) sulphides...al. (1991). Based on the description of this meteorite given in Rubin et al. (1988) we cannot recognize...parageneses in CK chondrites. All data in vol.% Meteorite Karoonda Mulga (West) Marahnga Cook 003 Watson...(1992) : py = pyrite ; pent = pentlandite ; pyr = pyrrhotite ; chalc = chalcopyrite ; troi = troilite; MSS...with a probe current of 20 nA (University of New Mexico, Albuquerque). All microprobe data for oxides were |
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| a gigantic (lmm diameter) Fremdling from the Allende CAI, Egg 6, was performed in an attempt to understand...Fremdlinge. Zel& is composed primarily of pentlandite, pyrrhotite and V-Q-rich magnetite. Minor phases include...and PtIr, and the magnetite reacting to form pyrrhotite. The evidence suggests that this sulfidization...diameter Fremdling rich in metal and oxides from the Allende CA1 524 I, which appears to be only slightly altered...was partially embedded resulted in some of her Allende, Leoville and Bali meteorites to find good outermost |
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| Society, 1997. Printed in USA. Mineralogy of meteorite groups ALANE. RUBIN Institute of Geophysics and...shocked ordinary chondrites. Secondary minerals in meteorite finds that formed during terrestrial weathering...numbers of meteorites (including members of new meteorite groups; Table 1) from hot and cold deserts, the...variations 23 1 A. E. Rubin 232 TABLEI . Meteorite classification. Chondrites Carbonaceous chondrites...Wasson and Kallemeyn, 1990). 233 Mineralogy of meteorite groups TABLE 2. Minerals in meteorites. ~~ ~ |
 | HSU, W, GUAN, Y, HUA, X, WANG, Y, LESHIN, L, SHARP, T (2006) Aqueous alteration of opaque assemblages in the Ningqiang carbonaceous chondrite: Evidence from oxygen isotopes. Earth and Planetary Science Letters, 243 (1) 107-114 doi:10.1016/j.epsl.2005.12.021 | Journal (article/letter/editorial) |
| University, Tempe, AZ 85287, USA d Center for Meteorite Studies, Arizona State University, Tempe, AZ 85287...assemblage is very similar to that of OAs found in Allende refractory inclusions. In this study, we performed...compositions. Hutcheon et al. [7] found that OAs from Allende CAIs contain the normal solar system mixture of...observed in Allende CAIs [4,5]. The major mineral phases are magnetite, Ni-rich metal, pyrrhotite/pentlandite...0.03 Cl 0.03 Total 97.3 89.6 100.1 99.5 Pyr: pyrrhotite; Pn: pentlandite; Whit: whitlockite; Mt: magnetite; |
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| by the IMACNMNC, including 17 from the Allende CV3 meteorite (Ma, 2015a) and high-pressure phases such...nuwaite oldhamite pentlandite plagionite pyrite pyrrhotite rudashevskyite schöllhornite smythite sphalerite...pyrite pyrochlore pyrope pyrophanite pyroxferroite pyrrhotite quartz rammelsbergite reevesite reidite rhenium...newly-identified refractory mineral tistarite (Ti2 O3 ) in Allende along with corundum and khamrabaevite (TiC) grains...khamrabaevite (TiC) grains in a chondrule from the Allende CV3 chondrite (Ma and Rossman, 2009a). BSE image |
 | Fehr, Manuela A., Rehkämper, Mark, Halliday, Alex N., Wiechert, Uwe, Hattendorf, Bodo, Günther, Detlef, Ono, Shuhei, Eigenbrode, Jennifer L., Rumble, Douglas (2005) Tellurium isotopic composition of the early solar system—A search for effects resulting from stellar nucleosynthesis, 126Sn decay, and mass-independent fractionation. Geochimica et Cosmochimica Acta, 69 (21) 5099-5112 doi:10.1016/j.gca.2005.04.020 | Journal (article/letter/editorial) |
| disk that were sampled during accretion of the meteorite parent bodies were well mixed and homogeneous...anomalies of its daughter 126Te in at least some meteorite parent bodies, is a supernova explosion that occurred...which the Sun and planets were formed (Smith and De Laeter, 1986). A number of studies have concluded...Mars (as sampled by SNC meteorites) and various meteorite parent bodies (e.g., Reynolds, 1967; Schönbächler...more recent terrestrial sulfides, a pyrite and a pyrrhotite, were analyzed in the present study (Table 1) |
