 | | Journal (article/letter/editorial) | | HAMMOND DOWNS, A NEW CHONDRITE FROM THE TENHAM AREA, QUEENSLAND, AUSTRALIA Brian Mason Smithsonian Institution...meteorites from the area of the Tenham shower (Queensland, Australia) was a 27 kg stone which proved...proved to be different from the other Tenham stones. It is a bronzite, H4, chondrite, the principal minerals...visible plagioclase. This meteorite was found about 1950 near the Hammond Downs station, hence the name; its...28' S., long 142° 48' E. INTRODUCTION During a meteorite expedition organized jointly by the Smithsonian |  | | Journal (article/letter/editorial) | | 0016-7037(95)00086-O Thermal and shock metamorphism of the Tenham chondrite: A TEM examination FALKO LANCENHORST...early episode of the solar system, the L6 chondrite Tenham has been affected by intense thermal metamorphism...phases majorite and ringwoodite, the L6 chondrite Tenham is an instructive example for strong shock metamorphism...signature of the silicates occurring in the bulk of Tenham. Plagioclase is either pervaded by thin (200 nm)...this study substantiate that the shock pressure in Tenham is heterogeneously distributed, ranging from approximately |  | | Journal (article/letter/editorial) | | similar and no signatures of high-pressure phases of chromite were found. The planar features occur along planar...dislocation densities found within chromite grains from the matrix of Tenham L6 chondrite. Using this observation...fossil achondrite the highest shocked fossil meteorite studied so far. This is makes Ost € 065 is a piece...Both elemental and isotopic studies of relict chromite and chrome-spinel grains from the fossil meteorites...Schmitz 2013) with the exception of one fossil meteorite € € 065), which was tentatively classified Osterplana |  | Xie, Z., Sharp, T. G., Leinenweber, K., DeCarli, P. S., Dera, P. (2011) A new mineral with an olivine structure and pyroxene composition in the shock-induced melt veins of Tenham L6 chondrite. American Mineralogist, 96 (2) 430-436 doi:10.2138/am.2011.3437 | Journal (article/letter/editorial) | | composition in the shock-induced melt veins of Tenham L6 chondrite Zhidong Xie,1,* Thomas g. sharp,2...that occurs in shock-induced melt veins of the Tenham L6 chondrite. The new mineral, identified by transmission...the deep upper mantle. Keywords: Shock-induced, Tenham, olivine, melt vein inTroduCTion Impact metamorphism...those synthesized in high-pressure experiments. The Tenham L6 chondrite was strongly shocked to shock stage...Z. Xie et al. 2006a). The crystal sizes in the Tenham melt veins range from several micrometers down |  | | Journal (article/letter/editorial) | | shock-produced (Mg, Fe)SiO3 glass in the Suizhou meteorite Ming CHEN,1* Xiande XIE,1 and Ahmed EL GORESY2...identified in the shock veins of the Suizhou meteorite. The glass is surrounded by a thick rim of polycrystalline...exceeds 23 GPa. The post-shock temperature in the meteorite could have been above 477 °C. This study indicates...perovskite transformed from orthopyroxene in the Tenham meteorite. Sharp et al. (1997) found vitrified perovskite...perovskite in the shock veins of the Acfer 040 meteorite, which was interpreted as an amorphized perovskite |  | Rout, Surya S., Heck, Philipp R., Zaluzec, Nestor J., Ishii, Takayuki, Wen, Jianguo, Miller, Dean J., Schmitz, Birger (2017) Shocked chromites in fossil L chondrites: A Raman spectroscopy and transmission electron microscopy study. Meteoritics & Planetary Science, 52 (9) 1776-1796 doi:10.1111/maps.12887 | Journal (article/letter/editorial) | | from matrix and shock-melt veins in Catherwood, Tenham, and Coorara L chondrites were studied using Raman...L chondrites show polycrystallinity, while the chromite grains in fossil L chondrites are single crystals...subgrains show intergrowths of chromite and xieite. Matrix chromite of Tenham has similar dislocation densities...densities and planar fractures as a chromite from the fossil meteorite Golvsten 001 and higher dislocation...dislocation densities than in chromite from the fossil meteorite Sextummen 003. Using this observation and knowing |  | | Journal (article/letter/editorial) | | It is found that the melt veins in the Suizhou meteorite morphologically are the simplest, straightest...after whitlockite, xieite, and the CF phase after chromite. On the basis of transformation of plagioclase...maskelynite, it is estimated that the Suizhou meteorite experienced shock pressures and shock temperatures...chondrites (Kimura et al. 2000, 2003). The Suizhou meteorite fell on April 15, 1986 at Dayanpo, Suizhou City...City, Hubei Province, China. This meteorite consists of the rock-forming minerals olivine, low-Ca pyroxene |  | | Journal (article/letter/editorial) | | Guangzhou, P.R. China Abstract: The Suizhou meteorite, classified as an L6 chondrite, contains weakly...in the meteorite was melted and transformed into maskelynite during shock metamorphism. Chromite was heavily...heavily fragmented and granulated, and many tiny chromite fragments were incorporated into the molten plagioclase...very thin shock melt veins occur in the Suizhou meteorite, which contain abundant high-pressure phases,...majorite-pyrope garnet. The shock features of this meteorite match shock stages 3 to 5, while the presence |  | | Journal (article/letter/editorial) | | tite assemblage in shock veins of Sixiangkou meteorite MING CHEN,1* XIANDE XIE,1 DEQIANG WANG,1 and SICHAO...to chromite that was embedded and dissolved in an Fe-Ni-S liquid. Cr2O3 dissociated from chromite was...Science Ltd iangkou meteorite were collected. The major portion of Sixiangkou meteorite is now preserved...Observatory, Chinese Academy of Sciences, Nanjing. The meteorite containing abundant shock veins was classified...1994). The chondritic portion of the Sixiangkou meteorite consists of rockforming minerals, including olivine |  | | Book | | Geochemistry/Mineralogy Xiande Xie Ming Chen Suizhou Meteorite: Mineralogy and Shock Metamorphism Springer...com/series/10171 Xiande Xie Ming Chen • Suizhou Meteorite: Mineralogy and Shock Metamorphism 123 Xiande...springer.com) Preface The Suizhou meteorite is a stone meteorite, which fell on April 15, 1986, in Dayanpo...province, China. Right after the fall of this meteorite, a group of scientists from the China University...collection of Suizhou meteorite samples. A total weight of 270 kg of this meteorite was collected. The largest |  | | Journal (article/letter/editorial) | | CaTi2O4-structured FeCr2O4 polymorph in the Suizhou meteorite and its significance in mantle mineralogy MING...polymorph of chromite has been discovered in the shock-metamorphosed Suizhou meteorite. The composition...precursor chromite. The Raman spectrum of this polymorph is distinct from that of chromite. Synchrotron...5% denser than chromite. The P-T conditions for the phase transformation from chromite to the CaTi2O4-structured...Ltd 1. INTRODUCTION 2. THE SUIZHOU METEORITE The Suizhou meteorite is a fall that was recovered in Dayanpo |  | | Journal (article/letter/editorial) | | Electron Petrography of Shock-Produced Veins in the Tenham Chondrite G.D. Price, A. Putnis, and S. O. Agrell...in, and adjacent to the black veins of the Tenham meteorite reveals that the minerals have undergone varying...shock. The orthopyroxenes of the bulk of the meteorite have been transformed to clinopyroxenes in areas...the release of pressure. The olivines of the meteorite are also deformed, and some have been transformed...the fi-phase polymorph. Introduction The Tenham meteorite is a white olivine-hypersthene chondrite, |  | | Journal (article/letter/editorial) | | feldspar, and quartz) and accessory minerals (chromite and Ca phosphate). These high-pressure minerals...minerals provide clues about the impact events of meteorite parent bodies, including their size and mutual...in Arizona, which was the product of an iron meteorite INTRODUCTION The Earth’s crust and upper mantle...ion milling and ultramicrotomy. In the case of meteorite samples, the target particles for TEM observations...ringwoodite, was discovered in the shock vein of the Tenham chondrite (L6; Binns et al. 1969). Ringwoodite |  | | Journal (article/letter/editorial) | | polymorphs in shock-induced melt veins in the meteorite and discusses their implication to the high pressure... and vitrified perovskite were observed in the Tenham L6 chondrite (Tomioka & Fujino, 1997, 1999; Xie...Pyx: pyroxene; Ak: akimotoite; Jd: jadeite; Chr: chromite; Mj: majorite; Mj-Py: majorite-pyrope; Msk: maskelynite;...Sample and analytical methods The Sixiangkou meteorite fell on August 15, 1989, in Sixiangkou Town of...FeNi metal and troilite. Minor phases include chromite, whitlockite, and chlorapatite (Chen et al., 1995 |  | Miyahara, Masaaki, Ohtani, Eiji, Kimura, Makoto, Ozawa, Shin, Nagase, Toshiro, Nishijima, Masahiko, Hiraga, Kenji (2011) Evidence for multiple dynamic events and subsequent decompression stage recorded in a shock vein. Earth and Planetary Science Letters, 307 (3) 361-368 doi:10.1016/j.epsl.2011.05.010 | Journal (article/letter/editorial) | | Stixrude. Keywords: decompression melting shocked meteorite olivine dendrite TEM a b s t r a c t We investigated...high-pressure melting experiments of the Allende meteorite and peridotite indicate that the magnesiowüstite...polymorphs of olivine, pyroxene, feldspar, phosphate, chromite and silica exist in and around the shock veins...-temperature melting experiments using the Allende meteorite and KLB-1 peridotite mimicking ordinary chondrites...events. It is likely that the parent-body of a meteorite has experienced collisions several times in the |  | Kayama, Masahiro, Sekine, Toshimori, Tomioka, Naotaka, Nishido, Hirotsugu, Kato, Yukako, Ninagawa, Kiyotaka, Kobayashi, Takamichi, Yamaguchi, Akira (2018) Cathodoluminescence of high-pressure feldspar minerals as a shock barometer. Meteoritics & Planetary Science, 53 (7) 1476-1488 doi:10.1111/maps.13092 | Journal (article/letter/editorial) | | on maskelynite and lingunite in L6 chondrites of Tenham and Yamato-790729. Under CL microscopy, bright...Maskelynite occurs widely in various types of shocked meteorite (e.g., lunar meteorites, shergottites, and ordinary...maskelynite, and lingunite in the L6 chondrites of Tenham and Yamato-790729 and to develop better CL barometer...MATERIALS We used two thin sections of L6 chondrites of Tenham from the Department of Geology and Paleontology...optical and electron microscopic observations, Tenham consists of olivine, Cathodoluminescence of high-pressure |  | | 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... Table 1 (Continued) Name Ilmenite Spinel Magnetite Chromite Formula FeTi0 3 MgAh 04 Fe304 FeCr204 Chlorapatite...accessory in some irons In Coorara and Tenham chondrites In Coorara and Tenham chondrites Accessory in Allende |  | | Journal (article/letter/editorial) | | November 2009 Editor: L. Stixrude Keywords: martian meteorite Chassigny ringwoodite high-pressure phase shock...c t Shock-induced melt pockets in the martian meteorite Chassigny are completely transformed into a set...phosphate γ-Ca3(PO4)2, and CaTi2O4-structured chromite were formed by solid state transformation and...increases with the pre-impact burial depth of the meteorite below the martian surface. The estimated burial...of potential source craters for the Chassigny meteorite. © 2009 Elsevier B.V. All rights reserved. 1 |  | Kato, Yukako, Sekine, Toshimori, Kayama, Masahiko, Miyahara, Masaaki, Yamaguchi, Akira (2017) High-pressure polymorphs in Yamato-790729 L6 chondrite and their significance for collisional conditions. Meteoritics & Planetary Science, 52 (12) 2570-2585 doi:10.1111/maps.12957 | Journal (article/letter/editorial) | | iron-sulfide with minor amounts of phosphate and chromite. A shock-melt vein was observed in the hostrock...ironsulfide with minor amounts of phosphate and chromite. The olivine in the host-rock has a brownish staining...several minor minerals, such as apatite, tuite, chromite, and xieite in Y-790729. Several apatite grains...2002, 2003). Several grains of aluminum-bearing chromite (diameter <~50 lm) were also entrained in the...shock-melt vein. Diagnostic Raman spectrum of chromite (A1g mode generated by the bonds in [Cr3+, Fe3+ |  | | Journal (article/letter/editorial) | | it is important to investigate a variety of meteorite samples with different preshock conditions and...to better understand the correlation between meteorite shock features and planetary impact conditions...the impact velocity and projectile size on the meteorite parent body. Ohtani et al. (2004) and DeCarli...plagioclase plus minor Fe-Ni alloy, troilite, and chromite. The host rock is mostly recrystallized overall...high-pressure experiments, such as those in Sixiangkou, Tenham, and Y-791384 L6 chondrites (Chen et al. 1996; |  | | Journal (article/letter/editorial) | | shock melt vein in the Villalbeto de la Pe~ na meteorite: Insights into the shock behavior of diopside...not been described previously in any shocked meteorite. Collectively, all these different lines of evidence...majorite was first reported in the Shergotty Martian meteorite (Malavergne et al. 2001). It has an augitic composition...Yamato 75100 (H6) (Tomioka and Kimura 2003) and Tenham (L6) (Xie and Sharp 2007). In Yamato 75100, the...with a Ca-rich glass (En23Fs5Wo72), whereas in Tenham, Ca-rich majorite (En64Fs10Wo27) occurs as a nanometer |  | | Journal (article/letter/editorial) | | 2017). In 2008, Dera et al. discovered that the meteorite mineral allabogdanite, Fe2P, is the result of...Recently stishovite was reported from a lunar meteorite (Kaneko et al. 2015). Presence of stishovite in...for the peak shock pressures that the Shergotty meteorite had experienced prior ejection from Mars (Fritz...pressures of the Shergotty meteorite. Thus, type seifertite in the Shergotty meteorite has probably formed from...spinel peridotite is a complex solid solution of chromite, hercynite, magnetite, spinel, and other spinel |  | | Journal (article/letter/editorial) | | olivine. Natural high-pressure phases in Martian meteorite allow to constrain phase transitions taking place...ringwoodite was discovered more than 40 yr ago in the Tenham L6 chondrite (Binns et al., 1969). Meanwhile ringwoodite...al., 2010) and in lithology A of the Martian meteorite Elephant Moraine (EET) A79001 (Walton, 2013)....standards including anorthoclase, basaltic glass, chromite, chromium augite, diopside, ilmenite, microcline...totaling 1619 g (Folco and Franchi, 2000). The meteorite is part of a strewn field in which so far eight |  | Ma, Chi, Tschauner, Oliver, Beckett, John R., Liu, Yang, Rossman, George R., Sinogeikin, Stanislav V., Smith, Jesse S., Taylor, Lawrence A. (2016) Ahrensite, γ-Fe2SiO4, a new shock-metamorphic mineral from the Tissint meteorite: Implications for the Tissint shock event on Mars. Geochimica et Cosmochimica Acta, 184. 240-256 doi:10.1016/j.gca.2016.04.042 | Journal (article/letter/editorial) | | new shock-metamorphic mineral from the Tissint meteorite: Implications for the Tissint shock event on Mars...(c-Mg2SiO4). It occurs in the Tissint Martian meteorite, where it forms through the transformation of...metamorphism; Nanomineral; Ringwoodite group; Tissint meteorite; Martian shergottite; Synchrotron diffraction ...heavily shocked ordinary chondrites. The Tissint meteorite is an olivine-phyric shergottite, consisting mainly...plagioclase-composition glass), and accessory chromite, ilmenite, merrillite, and FeS, plus scattered |  | | Journal (article/letter/editorial) | | the clues to understand the impact events of meteorite parent bodies, but also insights on the structure...Mg2SiO4Fe2SiO4 組成の相 平衡図を示す。スピネル構造を持つ(Mg, Fe)2SiO4 は 1969 年に Tenham コンドライト(L6)の衝撃熔融脈(ショックベ イン)から発見され，リングウッダイト(ringwoodite)と命...名された(Binns et al., 1969)。変形スピネル構造を持つ (Mg, Fe)2SiO4 も，同じく Tenham 中のショックベインか ら発見された(Putnis and Price, 1979)。その後，Peace...(Mg, Fe)SiO3perovskite (MgPv) in the Martian meteorite DaG 735 (Miyahara et al., 2011a). Two diŠerent... 地球惑星物質中の高圧鉱物 93 一方，Tomioka and Fujino (1997)は Tenham コンドラ イト( L6 )のショックベインに取り込まれた数十ミクロン ほどの単斜エンスタタイト[( |
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