 | | Journal (article/letter/editorial) | | Mg)Al12O19, a new alteration mineral from the Allende meteorite Chi Ma* Division of Geological and Planetary...Ca-,Al-rich refractory inclusion from the Allende meteorite. It occurs as scattered micrometer-sized single...single crystals within an aggregate of hercynite (Fe,Mg)Al2O4, adjacent to nepheline, ilmenite, ferroan...refractory inclusion, secondary alteration, Allende meteorite, carbonaceous chondrite, nanomineralogy introduCtion...During a nanomineralogy investigation of the Allende CV3 meteorite at Caltech, new refractory minerals and |  | | Journal (article/letter/editorial) | | Phases identified in these bodies include spinel, hercynite, gehlenite, anorthite, nepheline, diopside, fassaite...The allende meteorite shower fell at 0105 AM on 8 February 1969, over southern Chihuahua, Mexico [1 ]...over a strewn field of about 300 km 2 [2]. The meteorite is a Type III carbonaceous chondrite containing...crystalline phases. The Ca-AI rich masses in Allende occur in a variety of sizes and shapes: a few are...%) and impart a distinctive appearance to the meteorite, which otherwise consists of grey chondrules in |  | | Journal (article/letter/editorial) | | Majindeite, Mg2Mo3O8, a new mineral from the Allende meteorite and a witness to postcrystallization oxidation...Type B1 Ca-Al-rich inclusion, ACM-2, from the Allende CV3 carbonaceous chondrite. The type majindeite... Mg2Mo3O8, new mineral, kamiokite group, Allende meteorite, CV3 carbonaceous chondrite, EBSD, Ca-Al-rich...majindeite, Mg2Mo3O8, which was discovered in the Allende Type B1 Ca-Al-rich inclusion (CAI) ACM-2. In addition...2014a; Ma 2015a), and two first occurrences in a meteorite for the Mo-oxides tugarinovite (MoO2) and kamiokite |  | | Journal (article/letter/editorial) | | Hibonite-hercynite inclusion HH-1 from the LancC (C03) The history of an ultrarefractory CA1 meteorite: ALBERT...hibonite-rich refractory inclusion from the Lance CO3 meteorite. The inclusion, 290 X 230 pm in size, consists...grains, surrounded by a hercynite mantle and a thin diopside rim. The hercynite contains many small perovskite...in hibonite, perovskite, and ilmenite, but not hercynite. Calcium and titanium are isotopically anomalous...are 60%0 in “Ti and 11.5%0in 49Ti in hibonite, hercynite, perovskite, and ilmenite. In addition, the titanium |  | | Journal (article/letter/editorial) | | in 145, 1977 barium the 137 titanate Allende meteorite* TSUYOSHI TANAKA and Geological Survey...the Allende meteorite. Although the particles are distributed heterogeneously in the meteorite, their...their presence in matrix is not unusual for Allende. Two types of concentration pattern are observed. One...are distributed in very small inclusions of the meteorite, as if the particles construct a skeleton of the...are distributed in fine-grained matrix of the meteorite and show no bearing on their surroundings. REE |  | Russell, S.S., Huss, G.R., Fahey, A.J., Greenwood, R.C., Hutchison, R., Wasserburg, G.J. (1998) An Isotopic and Petrologic Study of Calcium-Aluminum-Rich Inclusions from CO3 Meteorites. Geochimica et Cosmochimica Acta, 62 (4) 689-714 doi:10.1016/s0016-7037(97)00374-8 | Journal (article/letter/editorial) | | melilite-rich inclusions, which also contain spinel/hercynite, perovskite, and occasionally hibonite; (2) spinel-pyroxene...spinel-pyroxene inclusions; and (3) hibonite-hercynite inclusions. In addition, several isolated hibonite...high Fe contents in spinels from all hibonite/hercynite inclusions. Occasionally, melilite and anorthite...characteristics and the petrologic type of the host meteorite. Spinel in melilite-rich and coarse-grained spinel-pyroxene...focused on CAIs from CV3 chondrites, particularly Allende, although data have been reported for CAIs from |  | Matsumoto, Megumi, Tomeoka, Kazushige, Seto, Yusuke, Miyake, Akira, Sugita, Mitsuhiro (2014) Nepheline and sodalite in the matrix of the Ningqiang carbonaceous chondrite: Implications for formation through parent-body processes. Geochimica et Cosmochimica Acta, 126. 441-454 doi:10.1016/j.gca.2013.11.016 | Journal (article/letter/editorial) | | and Al in the matrix of Ningqiang, the bulk meteorite abundances of these elements are comparable to...the chondrules and Ca–Al-rich inclusions in the meteorite parent body. Afterward, they were likely disaggregated...present setting of the meteorite. Hence, we suggest that the Ningqiang meteorite underwent these processes...1995) or by a reaction that took place in the meteorite parent body (e.g., Krot et al., 1997) has been...1998; Tomeoka and Itoh, 2004). The Ningqiang meteorite was described by Rubin et al. (1988) as an anomalous |  | Lenaz, Davide, Lughi, Vanni, Perugini, Diego, Petrelli, Maurizio, Turco, Gianluca, Schmitz, Birger (2019) MgAl
2
O
4
spinels from Allende and
NWA
763 carbonaceous chondrites: Structural refinement, cooling history, and trace element contents. Meteoritics & Planetary Science, 54 (12) 3089-3100 doi:10.1111/maps.13400 | Journal (article/letter/editorial) | | 10.1111/maps.13400 Report MgAl2O4 spinels from Allende and NWA 763 carbonaceous chondrites: Structural...September 2019) Abstract–MgAl2O4 spinels from Allende and NWA 763 carbonaceous chondrites were studied...LA-ICP-MS, and Raman spectroscopy. Those from Allende are almost pure, but, in one case, we found a strong...terrestrial spinels. In the zoned crystal from Allende, Co show a strong zonation similar to that of FeO...(2000) analyzed several spinel-bearing objects in Allende including olivine-rich objects, barred olivine |  | Ma, C., Connolly, H. C., Beckett, J. R., Tschauner, O., Rossman, G. R., Kampf, A. R., Zega, T. J., Smith, S. A. S., Schrader, D. L. (2011) Brearleyite, Ca12Al14O32Cl2, a new alteration mineral from the NWA 1934 meteorite. American Mineralogist, 96 (8) 1199-1206 doi:10.2138/am.2011.3755 | Journal (article/letter/editorial) | | Ca12Al14O32Cl2, a new alteration mineral from the NWA 1934 meteorite Chi Ma,1,* harold C. Connolly Jr.,2,3,4 John r...occurring as fine-grained aggregates coexisting with hercynite, gehlenite, and perovskite in a rare krotite (CaAl2O4)...Ca12Al14O32Cl2, new mineral, Cl-bearing mayenite, NWA 1934 meteorite, CV3 carbonaceous chondrite, SAED ring pattern...2010), is observed in the Northwest Africa 1934 meteorite (a CV3 carbonaceous chondrite). Krotite is a newly...here the first occurrence of Ca12Al14O32Cl2 in a meteorite, as an alteration mineral in a CAI. A preliminary |  | | Journal (article/letter/editorial) | | large amounts of almost pure and coarse-grained hercynite grains (approximately 56 vol%) as well as refractory...crystallized from a molten droplet. The fine-grained hercynite and unidentified aluminous phase in the rim of...secondary phase. We found numerous grains of hercynite (FeAl2O4) as the primary phase in a Ca-Al-Fe-rich...pure, coarse-grained hercynite crystals occupy >50 vol% of the inclusion. Hercynite crystals coexist with...Interpreted structure of the CAFI. Gro, grossite; Hc, hercynite; Dm, dmitryivanovite; Prv, perovskite; AP, aluminous |  | | Journal (article/letter/editorial) | | lath-shaped matrix olivine in the CV3 chondrite Allende and its dark inclusions ALEXANDER N. KROT1*, EDWARDR...1996 September I I ) Abstract-We have studied an Allende dark inclusion by optical microscopy, scanning...isolated olivines and matrix, which, as in the Allende host, is mainly composed of 5-20 p m long lath-shaped...contain 10-20 nm sized inclusions of chrornite, hercynite, and Fe-Ni sulfides. The fayalitic rims around...texturally and compositionally identical to those in Allende host, suggesting that they have similar origins |  | | Journal (article/letter/editorial) | | fractionation among individual chondrules from the Allende (CV3) chondrite KEIJIMISAWA’** and NOBORU NAKAMURA’S~...dilution techniques for 24 chondrules from the Allende (CV3) chondrite. The REE abundances are 2.5-10...trace elements including REE in chondrules from Allende and other carbonaceous chondrites, as well as chondrules...(precision - 3% or better) on 24 chondrules from the Allende (CV3) chondrite which clearly demonstrate the existence...the chemical characteristics of precursors of Allende chondrules. Preliminary results of this research |  | | Journal (article/letter/editorial) | | (AOI) in CK3 NWA 1559, comparison to AOIs in CV3 Allende, and the origin of AOIs in CK and CV chondrites...rims around AOI-1 and around many AOIs in CV3 Allende suggests that CK and CV AOIs formed by the acquisition...examined were nine large, rimmed AOIs selected from Allende in UCLA thin sections 459, 473, 474, and 502. Mineral...2001), but it is within the range of diopside in Allende AOIs (1.6–8.4 wt%; table 3 of Grossman and Steele...grains within the plagioclase are probably spinel-hercynite, but they are too small to analyze quantitatively |  | | Journal (article/letter/editorial) | | a gigantic (lmm diameter) Fremdling from the Allende CAI, Egg 6, was performed in an attempt to understand...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...polished Fremdlinge. Moreover, we found in the Allende CA1 section, Zelda was found to be composed primarily...coarse-grained CAls of various petrographic types from the Allende, Leoville and Bali meteorites were examined by |  | | Journal (article/letter/editorial) | | 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. ~~ ~ |  | | Journal (article/letter/editorial) | | electron microscopy of chondrule minerals in the Allende meteorite : constraints on the thermal and deformational...solar nebula prior to or during accretion of the meteorite parent bodies. The textures and mineralogy of...Miiller et al. : Chondrule minerals in the Allende meteorite heat source, precursor material, cooling...defects, precipitates, grain and phase boundaries). Allende is one of the best studied meteorites, but little...have chosen the Allende CV carbonaceous chondrite for our study, because this meteorite belongs to the |  | | Journal (article/letter/editorial) | | chemistry and origin of spinel-rich inclusions in the Allende CV3 chondrite ALAN S. KORNACKI Shell Oil Company...spinel-rich nodules in 16 olivine-rich inclusions) in Allende was studied by electron probe microanalysis. Variations...was also studied. The mineralogy of spinel-rich Allende inclusions is similar to the mineralogy of fine-grained...ALH-77003 and rims on coarse-grained CAl’s in Allende; spine]-rich inclusions in Mokoia, Kaba, and Murchison...mineral chemistry, and bulk chemistry of spinel-rich Allende inclusions indicate that they are not primitive |  | | Journal (article/letter/editorial) | | mdling from the Allende CA1 5241, was performedand comparedto other Fremdlingefrom Allende CAPS 5241 Abstract-A...scheelite (the first reported occurrence in a meteorite), and Cl-apatite. Phase8 found in trace amounts...interior of Willy and the co-existence of metal, hercynite spinet and magnetite at the rimmantle boundary...Armstrong. A. El Gores) In the course of a study of Allende NMNH-5241. CA1 lent to us through the courtesy...small Fremdlinge located in Allende 5241 and in a section of the Allende type Bl CA1 TS34 generously |  | | Journal (article/letter/editorial) | | Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131, USA *Correspondence author's...Most past AOI studies were of inclusions in the Allende CV3 chondrite (e.g., Grossman and Steele, 1976;...Kornacki and Wood (1984) defined two types ofAOIs in Allende, "rimmed" and "unrimmed", based on the presence...transmitted and reflected light. Five AOIs in each meteorite were analyzed for 10 elements with the Cameca...TABLE I. C03 chondrites and section numbers. Meteorite Yamato-81020 Allan Hills A77307 Colony Kainsaz |  | | Journal (article/letter/editorial) | | 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...s Ti0 2 Formula Accessory in Odessa iron and Allende (CellI) Rare, in ureilites Rare, in ureilites Accessory...6 7,8 9 10 II 12 4 1,2 3 Reference w w Hercynite Hibonite Perovskite Whewellite *Stanfieldite *Brianite |  | | Journal (article/letter/editorial) | | INCLUSIONS (CAIs) IN CV CHONDRITES, particularly Allende, have been extensively studied, but much less work...electron microscope studies ofCAIs in the Antarctic meteorite Yamato791717 (Y791717), a CO chondrite (Yanai..."sinuous"-rimmed, complex CAIs described from the Allende CY chondrite (Kornacki and Wood, 1984) and appear...30 20 40 60 50 mol.% FeAI 20 4 FIG. 6. Hercynite (FeAI,04) contents of spinel in inclusions in...are from 25 different inclusions. The range of hercynite contents for spinel in inclusion Y17-2l is also |  | | Journal (article/letter/editorial) | | Weisberg et al., 1991), are named after the Rumuruti meteorite, the first, and so far only R chondrite fall; all...indicate the references listed in the footnote. Meteorite Class Concentric spinelrich CAIs Rumuruti ...inclusions from metamorphosed lithologies. Since many meteorite samples are breccias we found CAIs within metamorphosed...spinel–pyroxene inclusions in the ungrouped C3 meteorite Ninquiang (Lin and Kimura, 2003). The Mighei spinel–pyroxene...inclusions from metamorphosed lithologies. Since many meteorite samples are breccias CAIs were found within metamorphosed |  | | Journal (article/letter/editorial) | | asteroid processes; for example, Kaba (CV3.1) and Allende (CV3.6) experienced fluid-assisted thermal metamorphism...by Itoh et al. (2004). Like Kaba, the Allende (CV3.6) meteorite experienced metasomatic alteration during...Huss et al. 2006; Ito and Messenger 2010). In the Allende refractory inclusions, this alteration resulted...Similar secondary minerals are present in the Allende chondrules, matrix and lithic chondritic fragments...pyroxene; sp = spinel. diagram, compositions of the Allende secondary minerals plot along mass-dependent fractionation |  | | Journal (article/letter/editorial) | | within the plagioclase– olivine inclusions in Allende meteorite and cooling rates of terrestrial ultramafic...terrestrial ultramafic rocks and the POIs in Allende meteorite. 1. INTRODUCTION Diffusion data in spinel...plagioclase– olivine inclusions (POIs) in the Allende meteorite. The interdiffusion of Fe2⫹ and Mg also seems...pellet. However, attempts to synthesize pure hercynite (FeAl2O4) according to the same procedure yielded...use as a microprobe standard, we synthesized hercynite from a stoichiometric mixture of FeO, which was |  | | Journal (article/letter/editorial) | | become more Fe-rich, reaching ⬃50 – 60 mol.% hercynite probably due to redistribution of FeO by thermal...similar to those of olivines in AOAs from the Allende CV3 chondrite and from the same thin section of...d. n.d. 6.00 4.03 ⫺30.0 ⫺25.5 2.3 1.1 mol.% hercynite) enclosing 1–5 m perovskite, hibonite laths,...consist of fine-grained spinel (40 –70 mol.% hercynite) that often encloses perovskite, ilmenite, ulvöspinel...of melilite and anorthite. In addition, high hercynite contents of spinel indicate that the degree of |
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