 | | Report (issue) | | Orthorhombic. Point Group: 2/m 2/m 2/m. ringwoodite or wadsleyite crystals. Physical Properties: Cleavage: n.d...3.405 (54), 1.453 (32) Chemistry: (1) Suizhou meteorite; calculated from structure; corresponds to (Mg...Polymorphism & Series: Polymorph of forsterite, wadsleyite, and ringwoodite. Occurrence: In melt veins of...Association: Ringwoodite, wadsleyite. Distribution From the Suizhou meteorite, fell at Xihe, Zengdu District...(holotype), the Tenham meteorite, fell at Tenham Station, Windorah, Barcoo Shire, Queensland, Australia (cotype) |  | 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...Earth’s transition zone and lower mantle (majorite, wadsleyite, ringwoodite, bridgmanite) were all originally |  | | 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...chondrite of shock stage 4-5. Major phases in this meteorite are olivine, orthoenstatite, diopside, plagioclase |  | | Journal (article/letter/editorial) | | High-pressure phases in a shock-induced melt vein of the Tenham L6 chondrite: Constraints on shock pressure and...and mineralogy of a 580-lm-wide melt vein in the Tenham L6 chondrite were investigated using field-emission...at least 40 ms. Using a synthetic Hugoniot for Tenham and assuming that the sample experienced a peak-shock...GPa near the impact site, we estimate that the Tenham parent body experienced an impact with collision...Introduction Tenham fell in 1879 near Tenham Station (25°440 S, 142°570 E) in South Gregory, Queensland, Australia |  | | 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 |  | | Report (issue) | | = 8.113{8.127 Z=8 X-ray Powder Pattern: Tenham meteorite. 2.447 (100), 1.434 (60), 2.028 (40), 2.872...42 0.05 22.98 0.30 37.86 0.05 [99.66] (1) Tenham meteorite; by electron microprobe, corresponding to...Fe2+ 0:52 )§=2:00 SiO4 : (2) Pampa del In¯erno meteorite; by electron microprobe, Al 2 O3 ; Cr2 O3 ; NiO;...Polymorphism & Series: Trimorphous with forsterite and wadsleyite. Occurrence: In veinlets cutting the matrix...silicate glass. Distribution: meteorites. In the Tenham, Pampa del In¯erno, Catherwood, and Coorara chondrite |  | | Journal (article/letter/editorial) | | most abundant mineral in the upper mantle, to wadsleyite (a modified spinel structure) or to ringwoodite...composition has been found in a shocked chondritic meteorite (Tomioka and Fujino, 1997, 1999). This sowed intergrowths...CLINOENSTATITE-AKIMOTOITE INTERGROWTH IN A SHOCKED METEORITE The lamellar intergrowth of (Mg,Fe)SiO3 akimotoite...clinoenstatite was identified in the heavily shocked Tenham meteorite. (Mg,Fe)SiO3 perovskite, which is one of the...polymorphs of enstatite, was also discovered in this meteorite. The chemical composition of the perovskite − |  | | Journal (article/letter/editorial) | | 859–869, 2013 The pressures and temperatures of meteorite impact: Evidence from micro-Raman mapping of mineral...identification of mineral phases such as olivine, wadsleyite, ringwoodite, high-Ca clinopyroxene, majorite-pyrope...shocked chondrites include: ringwoodite; majorite; wadsleyite; magnesiowüstite; akimotoite; lingunite; silicate–perovskite;...(e.g., olivine to ringwoodite without forming wadsleyite) (Sharp and De Carli 2006; Stöffler et al. 1991;...its discovery by Binns et al. (1969) in the Tenham meteorite (e.g., Gupta and Goyal 2011; Madon and Poirier |  | | Journal (article/letter/editorial) | | a shock-induced melt vein in an H chondritic meteorite. The bulk chemical composition of these aggregates...meteorites. Ultrahigh-pressure polymorphs of olivine (wadsleyite, ringwoodite), lowCa pyroxene (majorite, akimotoite...with augite composition in a shocked Martian meteorite [12]. However, high-pressure phase transition...hollandite (Hol), majorite (Maj), jadeite (Ja), and wadsleyite (Wad) [15]. +CaSiO3 -perovskite, and MgSiO3... 2. ATEM observations We examined the Y75100 meteorite collected in Antarctica, which is an ordinary |  | | 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) |  | 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) | | the shock events. Wadsleyite and jadeite were identified in Sahara 98222. Wadsleyite, ringwoodite, majorite...(NaAlSi3O8-hollandite) were identified in Yamato 74445. Wadsleyite nucleated along the grain boundaries and fractures...shock features observed, and the existence of wadsleyite and ringwoodite discussed later, indicate that...matrix filling inside the SMVs. We identified wadsleyite and jadeite as high-pressure minerals in the...polymorph wadsleyite (Figs. 2 and 7a). Back-scattered electron (BSE) images show that wadsleyite occurs |  | | Journal (article/letter/editorial) | | assemblage, which consists of clinopyroxene and wadsleyite, solidified at ~15 GPa, suggesting a second veining... 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...in L chondrites commonly include ringwoodite, wadsleyite, garnet, akimotoite, vitrified bridgmanite, and...the impact velocity and projectile size on the meteorite parent body. Ohtani et al. (2004) and DeCarli |  | 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 |  | 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...FeO-rich ringwoodite rims (light gray) (Fig. 2c). No wadsleyite was observed in these ringwooditeolivine assemblages |  | | Journal (article/letter/editorial) | | implications for planetary science. Keywords: Shocked meteorite, Highpressure polymorph, Olivine, Silica I....その周囲ではケイ酸塩，リン酸塩鉱物，シリカなどの高密 Fig. 1. Photograph of a shocked meteorite (Dar al Gani 477 L6 ordinary chondrite) with a...grain adjacent to a shockmelt vein in Martian meteorite, Dar al Gani 735. Two diŠerent decomposition textures...of seifertite (Sei) in silica grain of lunar meteorite, Northwest Africa 4734. Amorphous or poorly crystallized...K. (2013): The pressures and temperatures of meteorite impact: Evidence from microRaman mapping of mineral |  | 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...-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...melting experiments of KLB-1 peridotite and Allende meteorite, which allowed us to estimate a meaningful shock |  | | Journal (article/letter/editorial) | | It is found that the melt veins in the Suizhou meteorite morphologically are the simplest, straightest...maskelynite, it is estimated that the Suizhou meteorite experienced shock pressures and shock temperatures...of high-pressure phases such as ringwoodite, wadsleyite, majorite, among others (e.g., Binns et al. 1969;...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 |  | Stöffler, Dieter, Hamann, Christopher, Metzler, Knut (2019) Addendum to “Stöffler, D., Hamann, C., and Metzler, K., Shock metamorphism of planetary silicate rocks and sediments: Proposal for an updated classification system. Meteoritics & Planetary Science 53, 5–49, 2018”. Meteoritics & Planetary Science, 54 (4) 946-949 doi:10.1111/maps.13246 | Journal (article/letter/editorial) | | veins/pockets of shock stages S5–S6 (ringwoodite, wadsleyite, ahrensite, majorite, akimotoite, bridgmanite...that all samples taken from a large meteorite or from a meteorite strewn field show the same degree of... natural (Mg,Fe)2SiO4 spinel group in the Tenham meteorite. Nature 221:943–944. Liu L.-G. and El Goresy...new shock-metamorphic mineral from the Tissint meteorite: Implications for the Tissint shock event on Mars...Smith D. G. W. 1983. Wadsleyite, natural ß-(Mg,Fe)2SiO4 from the Peace River meteorite. Canadian Mineralogist |  | | Journal (article/letter/editorial) | | source acting in the (100) planes (Chondrite L6 Tenham - TEM bright field, g = 002). 257 Fig. 6. Amorphous...characteristics of shock-induced microstructures in the two meteorite major phases, kamacite (bcc, Ni-poor) and taenite...dislocations tend to form cell structures (Iron meteorite Gibeon - TEM bright field). (b) Dislocations in...1983; Madon & Poirier, 1983; Sharp et al., 1997). Wadsleyite and ringwoodite II - Shock-induced phase transformations...first discovered by Binns et al. (1969) in the Tenham chondrite. It occurs in meteorites as polycrystalline |  | Bindi, Luca, Brenker, Frank E., Nestola, Fabrizio, Koch, Tamara E., Prior, David J., Lilly, Kat, Krot, Alexander N., Bizzarro, Martin, Xie, Xiande (2019) Discovery of asimowite, the Fe-analog of wadsleyite, in shock-melted silicate droplets of the Suizhou L6 and the Quebrada Chimborazo 001 CB3.0 chondrites. American Mineralogist, 104 (5) 775-778 doi:10.2138/am-2019-6960 | Journal (article/letter/editorial) | | Letter Discovery of asimowite, the Fe-analog of wadsleyite, in shock-melted silicate droplets of the Suizhou...single-crystal X‑ray diffraction study of the Fe-analog of wadsleyite [a = 5.7485(4), b = 11.5761(9), c = 8.3630(7)...contain Fe-rich wadsleyite (Fa30–45). Although the existence of such Fe-rich wadsleyite in shock veins...zone in Earth. Keywords: Wadsleyite, iron, spinelloid, chondrite, meteorite, crystal structure, microprobe...(Tomioka and Fujino 1999; Bindi et al. 2017), wadsleyite (Price et al. 1983), ringwoodite-ahrensite (Binns |  | | Journal (article/letter/editorial) | | 2017). In 2008, Dera et al. discovered that the meteorite mineral allabogdanite, Fe2P, is the result of...forsterite, to the incipient high-pressure phases wadsleyite, at 410 km, and ringwoodite, at 520 km depth...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 |  | | 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...)からも同様の鉱物が発見され， オーストラリアの結晶学者 A.D. Wadsley にちなんで，ワ ズレアイト(wadsleyite)と命名された(Price et al., 1983)。 Fig. 1. Phase diagram...phase (ringwoodite); Wd, modiˆed-spinel phase (wadsleyite); Mw, magnesiow äustite; MgPv, (Mg, Fe)SiO3perovskite; |  | | 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...amorphous (Mg,Fe)SiO3-perovskite, ringwoodite, wadsleyite, high-pressure phosphate γ-Ca3(PO4)2, and CaTi2O4-structured...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 |  | | 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...mantle (>660 km in depth). These minerals include wadsleyite, ringwoodite, majorite, akimotoite, silicate...high-pressure minerals such as ringwoodite, majorite, and wadsleyite (Mason et al. 1968; Binns et al. 1969; Putnis |
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