 | | 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...olivine (FoTSFaZ5),enstatite (En79Fs19W02), and diopside (En4,Fs8Wo& Using these data, empirical pyroxene...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) |  | | Journal (article/letter/editorial) | | new silicate mineral of the ilmenite group in the Tenham chondrite NAOTAKA TOMIOKA* AND KIYOSHI FUJINO...ilmenite group, was found in the shock-metamorphosed Tenham chondrite. It occurs as aggregates adjacent to...pressure and temperature generated by shock events in Tenham are estimated to be 22 GPa ,Pmax , 26 GPa and Tmax...a natural silicate perovskite phase in the Tenham meteorite was found. These high-pressure silicate minerals...sci.hokudai.ac.jp 0003–004X/99/0003–0267$05.00 Tenham chondrite, as compared to that in the Acfer 040 |  | 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 |  | Ma, Chi, Tschauner, Oliver, Bindi, Luca, Beckett, John R., Xie, Xiande (2019) A vacancy‐rich, partially inverted spinelloid silicate, (Mg,Fe,Si)
2
(Si,□)O
4
, as a major matrix phase in shock melt veins of the Tenham and Suizhou L6 chondrites. Meteoritics & Planetary Science, 54 (9) 1907-1918 doi:10.1111/maps.13349 | Journal (article/letter/editorial) | | a major matrix phase in shock melt veins of the Tenham and Suizhou L6 chondrites Chi MA 1* , Oliver... was discovered within shock melt veins in the Tenham and Suizhou meteorites, two highly shocked L6 ordinary...remainder composed of a vitrified (Mg,Fe)SiO3 phase (in Tenham) or (Mg,Fe)SiO3-rich clinopyroxene (in Suizhou);...inferred conditions during shock melt cooling of the Tenham and Suizhou meteorites, revealing in particular...Meteoritical Society, 2019. 2 C. Ma et al. chondrites, Tenham and Suizhou. The main structural characteristic |  | | Journal (article/letter/editorial) | | transformation in a shock-induced melt vein of Tenham L6 chondrite Zhidong Xie ⁎, Thomas G. Sharp School...fragments entrained in a 580-μm-wide melt vein of the Tenham L6 chondrite were investigated using fieldemission...suggest that most solid-state transformations in the Tenham are reconstructive. The transformation of olivine...ringwoodite lamellae; growth rate; Tenham 1. Introduction Tenham is a highly shocked L6 chondrite with...fragments in the same 580-μm-wide melt vein in Tenham. High-pressure minerals are common in and adjacent |  | Ferroir, Tristan, Beck, Pierre, Van de Moortèle, Bertrand, Bohn, Marcel, Reynard, Bruno, Simionovici, Alexandre, El Goresy, Ahmed, Gillet, Philippe (2008) Akimotoite in the Tenham meteorite: Crystal chemistry and high-pressure transformation mechanisms. Earth and Planetary Science Letters, 275 (1) 26-31 doi:10.1016/j.epsl.2008.07.048 | Journal (article/letter/editorial) | | / l o c a t e / e p s l Akimotoite in the Tenham meteorite: Crystal chemistry and high-pressure transformation...20 September 2008 Editor: L. Stixrude Keywords: tenham chondrite shock melt vein akimotoite perovskite...documented in the shock-induced melt veins of the L6 Tenham chondrite. Four textural relationships between...al., 2004). The Tenham chondrite fell in 1879 in South Georgy, Queensland Australia. It is classified...4-5. Major phases in this meteorite are olivine, orthoenstatite, diopside, plagioclase, the latter partially |  | | Journal (article/letter/editorial) | | electron microscopy (ATEM) in two shocked chondrites, Tenham (L6) and Gaines County (H5). We have characterized...shock indices in the relevant minerals of the meteorite (Stoffler et al., 1991; Bischoff and Stoffler...glass in chondrules, the formation of feldspar and diopside, the equilibration of silicates and grain growth...chondrites have been studied: on the one hand, the Tenham meteorite, which is a highly shocked L6 chondrite and...H5 chondrite. Although it is more weathered than Tenham, Gaines County was chosen because it contains quite |  | | 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 |  | | Journal (article/letter/editorial) | | www.elsevier.com/locate/epsl The breakdown of diopside to Ca-rich majorite and glass in a shocked H chondrite...chondritic meteorite. The bulk chemical composition of these aggregates is similar to that of diopside CaMgSi2...assemblages are dissociation products of the host diopside and were produced at V18^24 GPa by a shock event...reserved. Keywords: shock event; H chondrite; diopside; majorite; perovskite 1. Introduction Olivine...with augite composition in a shocked Martian meteorite [12]. However, high-pressure phase transition |  | | Journal (article/letter/editorial) | | signatures in meteoritic minerals (olivine, enstatite, diopside, plagioclase and metal) as evidenced by transmission...olivine at the TEM scale. Diopside Shock-induced microstructures in diopside includes a great variety...(mainly due to PDFs). Plastic deformation in shocked diopside is generally characterized by the presence of...al., 1998). The main characteristic of shocked diopside is the presence of pervasive thin twins (typically...planes. Such twins have been observed in meteoritic diopside (Nord & McGee, 1979; Ashworth, 1980a, 1985; Müller |  | | Journal (article/letter/editorial) | | found within chromite grains from the matrix of Tenham L6 chondrite. Using this observation and taking...fossil achondrite the highest shocked fossil meteorite studied so far. This is makes Ost € 065 is a piece...Schmitz 2013) with the exception of one fossil meteorite € € 065), which was tentatively classified Osterplana...Society, 2018. 2 S. S. Rout et al. that the meteorite is different from any previously known meteorites...body of € 065 had experienced high shock and the meteorite Ost could be a fragment of the impactor that broke |  | | Journal (article/letter/editorial) | | 859–869, 2013 The pressures and temperatures of meteorite impact: Evidence from micro-Raman mapping of mineral...its discovery by Binns et al. (1969) in the Tenham meteorite (e.g., Gupta and Goyal 2011; Madon and Poirier...shearing during the shock event that extracted the meteorite from its parent body. The melt veins form a network...ringwoodite and olivine were found so far in Taiban meteorite under optical microscope and SEM observations...photomicrograph of the black melt vein of the Taiban meteorite. Pockets inside the vein contain pyroxene (px) |  | | Journal (article/letter/editorial) | | interaction in quenched shock-induced melt of the Tenham L6-chondrite Hugues Leroux a; *, Jean-Claude Doukhan...microstructures in the shock-induced melt pockets of the Tenham (L6) chondrite have been investigated by analytical...shock metamorphism; ultrastructure 1. Introduction Tenham is a heavily shocked L6 chondrite * Corresponding...leroux@univ-lille1.fr (shock stage S6). The meteorite contains a dense network of shock-induced melt...example provided by shocked-melt pockets in the Tenham meteorite, for investigating the other limiting case |  | | Journal (article/letter/editorial) | | polymorphs in shock-induced melt veins in the meteorite and discusses their implication to the high pressure...are majorite and majorite-pyrope solid solution. Diopside, akimotoite and jadeite were also observed in...in melt veins of the Sixiangkou chondrite. Diopside coexists with ringwoodite (+ akimotoite) in coarse-grained...proposed for the lack of phase transformation of diopside: a) low local temperature and b) a very sluggish... and vitrified perovskite were observed in the Tenham L6 chondrite (Tomioka & Fujino, 1997, 1999; Xie |  | | Journal (article/letter/editorial) | | 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...spinel was discovered in the shock vein of a meteorite, the Umbarger chondrite (L6; Xie et al. 2002b) |  | Ohtani, Eiji, Kimura, Yukiko, Kimura, Makoto, Takata, Toshiko, Kondo, Tadashi, Kubo, Tomoaki (2004) Formation of high-pressure minerals in shocked L6 chondrite Yamato 791384: constraints on shock conditions and parent body size. Earth and Planetary Science Letters, 227 (3) 505-515 doi:10.1016/j.epsl.2004.08.018 | Journal (article/letter/editorial) | | observed in Yamato 791384 L6 chondrite. Host meteorite mainly consists of olivine, pyroxenes and plagioclase...veins and the vein margin region of the host meteorite were partially or totally transformed into high-pressure...growth in olivine indicates that the shocked meteorite experienced the pressure for at least 4 s. Such...high-pressure phases and their textures in this meteorite, and estimated the pressure and temperature conditions... We identified mineral phases in the Y791384 meteorite by using the micro-Raman spectroscopy and documented |  | 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) | | structure—a high-pressure silicate discovered in the Tenham chondrite (Ma et al. 2018a). Over the past six...(Ti4+Fe2+)Ti4+ 3 O9 Space group, structure type C2/c, diopside-type Fd3m, spinel-type I4/m, hollandite-type Pnma...al. (2016) Zagami shergottite Ma et al. (2018c) Tenham L6 chondrite Tschauner et al. (2014) Zagami, NWA...2018) and the type machiite in the Murchison CM meteorite (Makide et al. 2013). This implies that machiite...high-pressure clinopyroxene in the Tissint martian meteorite. Earth and Planetary Science Letters, 422, 194–205 |  | | Journal (article/letter/editorial) | | ACKNOWLEDGMENTS We thank Carlton Moore and the Center for Meteorite Studies at Arizona State University for supplying...Ringwoodite, natural (Mg, Fe)2SiO4 spinel in the Tenham meteorite. Nature, 221, 943–944. Chen, M., Sharp, T...NaAlSi3O8hollandite in the shocked Sixiangkou meteorite. Science, 287, 1633–1636. Irifune, T. (1993) Phase...Jr. (1968) Olivine-garnet transformation in a meteorite. Science, 160, 66–67. Oguri, K., Funamori, N....Highpressure and high-temperature phase transitions in diopside CaMgSi2O6. Physics of the Earth and Planetary |  | Ozawa, Shin, Ohtani, Eiji, Miyahara, Masaaki, Suzuki, Akio, Kimura, Makoto, Ito, Yoshinori (2009) Transformation textures, mechanisms of formation of high-pressure minerals in shock melt veins of L6 chondrites, and pressure-temperature conditions of the shock events. Meteoritics & Planetary Science, 44 (11) 1771-1786 doi:10.1111/j.1945-5100.2009.tb01206.x | Journal (article/letter/editorial) | | host rock are olivine (Fo76), enstatite (En79), diopside (En48Fs8Wo44–45), plagioclase (Ab83–85An10Or5–7)...ringwoodite, which has been described from this meteorite in a previous report (Grossman 1999). Jadeite...EPMA-WDS. Olivine 9 n Wadsleyite 6 Enstatite 8 Diopside 10 Maskelynite 8 Jadeite 6 SiO2 TiO2 Al2O3...Na2O = 0.01, and K2O = 0.01 for enstatite and diopside. the original olivine in contact with the matrix...olivine; Wd = wadsleyite; En = enstatite; Di = diopside; Jd = jadeite-containing grains; and Mtx = matrix |  | | 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...accessory in some irons In Coorara and Tenham chondrites In Coorara and Tenham chondrites Accessory in Allende...Dodd (1971) 1. Originally reported in the Abee meteorite by Dawson et al. (1960), but later identified |  | | Journal (article/letter/editorial) | | pressure in some cases. Thick melt veins in the Tenham L6 chondrite contain majorite and magnesiowüstite...However, very thin melt veins (5–30 μm wide) in Tenham contain glass, olivine, clinopyroxene, and ringwoodite...(Chen et al. 1996), Acfer 040 (Sharp et al. 1997), Tenham (Tomioka and Fujino 1997; Xie et al. 2006), Umbarger...(Table 1), were obtained from the Center for Meteorite Studies at Arizona State University for investigation...Waconda, Pinto Mountains, Beaver, Umbarger, and Tenham. Doubly polished demountable thin sections were |  | 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...intergrowths of chromite and xieite. Matrix chromite of Tenham has similar dislocation densities and planar fractures...fractures as a chromite from the fossil meteorite Golvsten 001 and higher dislocation densities than in...fossil meteorite Sextummen 003. Using this observation and knowing that the matrix of Tenham experienced...respectively, and we conclude that the studied fossil meteorite chromites are from matrix. (Fig. 1) in Middle |  | | 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...rock of NWA 757 consists of olivine, enstatite, diopside, plagioclase plus minor Fe-Ni alloy, troilite...spectroscopy shows that they are clinoenstatite and diopside (Fig. 2). No evidence for pyroxene transformation |  | Feng, Lu, Miyahara, Masaaki, Nagase, Toshiro, Ohtani, Eiji, Hu, Sen, El Goresy, Ahmed, Lin, Yangting (2017) Shock-inducedP-Tconditions and formation mechanism of akimotoite-pyroxene glass assemblages in the Grove Mountains (GRV) 052082 (L6) meteorite. American Mineralogist, 102 (6) 1254-1262 doi:10.2138/am-2017-5905 | Journal (article/letter/editorial) | | assemblages in the Grove Mountains (GRV) 052082 (L6) meteorite Lu Feng1,2, Masaaki Miyahara3,4, Toshiro Nagase5...highly equilibrated low iron ordinary chondritic meteorite (L6). Coexistence of ringwoodite, majorite, and...Akimotoite, pyroxene glass, high-pressure polymorphs, meteorite, shock, impact Introduction Orthopyroxenes [(Mg...highly equilibrated low iron ordinary chondritic meteorite (L6), with very homogeneous compositions of olivine...electron beam was focused to about 1 μm in diameter. Diopside (Ca and Si), jadeite (Na), almandine garnet (Fe |
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