Abstract
An assemblage with metal, troilite, Fe–Mn–Na phosphates, and Al-free chromite was identified in the metal-troilite eutectic nodules in the shock-produced chondritic melt of the Yanzhuang H6 meteorite. Electron microprobe and Raman spectroscopic analyses show that a few phosphate globules have composition of Na-bearing graftonite (Fe,Mn,Na)3(PO4)2, whereas most other correspond to Mn-bearing galileiite Na(Fe,Mn)4(PO4)3 and a possible new phosphate phase of Na2(Fe,Mn)17(PO4)12 composition. The Yanzhuang meteorite was shocked to a peak pressure of some tens GPa and a peak temperature of ~2000 ℃. All minerals were melted after pressure release to form a chondritic melt due to very high postshock heat that brought the chondrite material above its liquidus. The volatile elements P and Na released from whitlockite and plagioclase along with elements Cr and Mn released from chromite are concentrated into the shock-produced Fe–Ni–S–O melt at high temperatures. During cooling, microcrystalline olivine and pyroxene first crystallized from the chondritic melt, and the formed metal-troilite eutectic intergrowths and silicate glass finally solidified at about 950–1000 ℃. On the other hand, P, Mn, and Na in the Fe–Ni–S–O melt combined with Fe and crystallized as Fe–Mn–Na phosphates within troilite, while Cr combined with Fe and crystallized as Al-free chromite also within troilite.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Antenucci D, Miehe G, Tarte P, Schemahl WW, Fronsolet AM (1993) Combined X-ray Rietveld, infrared and Raman study of a new synthetic variety of alluaudite, NaCdIn2(PO4)3. Eur J Mineral 5:207–213
Begemann F, Wlotzka F (1969) Shock induced thermal metamorphism amd mechanical deformation in the Ramsdorf chondrite. Geochim Cosmochim Acta 33:1351–1370
Begemann F, Palme H, Spettel B, Weber HW (1992) On the thermal history of heavily shocked Yanzhuang H-chondrite. Meteoritics 27:174–178
Bild RW (1974) New occurrences of phosphates in iron meteorites. Contrib Miner Petrol 45:91–98
Burba CM, Frech R (2006) Vibrational spectroscopic investgation of structurally related LiFePO4, NaFePO4, FePO4, compounds. Spectrochim Acta, Part A 65:44–50
Chen M (1992) Micromineralogy and shock effects in Yanzhuang chondrite (H6). Ph.D. thesis, The Institute of Geochemistry, Chinese Academy of Sciences, 95 p (in Chinese with English abstract)
Chen M, Xie XD (1995) TEM microstructures of the metallic dendrites in the shock-induced melt pocket of the Yanzhuang meteorite. Neues Jahrbuch fur Mineralogie—Abhandlungen 8:337–343
Chen M, Xie XD (1996) Na behavior in shock-induced melt phase of the Yanzhuang (H6) chondrite. Eur J Mineral 8:325–333
Chen M, Xie XD (1997) Shock effects and history of the Yanzhuang meteorite: a case different from the L-chondrites. Chin Sci Bull 42:1889–1893
Chen M, Xie XD, El Goresy A (1995) Nonequilibrium solidification and microstructures of metal phases in the shock-induced melt of the Yanzhuang (H6) chondrite. Meteoritics 30:28–32
Chen M, Wopenka B, Xie XD, El Goresy A (1995b) A new high-pressure polymorph of chlorapatite in the shocked Sixiangkou (L6) chondrite. In: Proceedings of the 26th lunar and planetary science conference, pp 237–238
Chen M, Sharp TG, El Goresy A, Wopenka B, Xie XD (1996) The majorite-pyrope + magnesiowustite assemblage: constraints on the history of shock veins in chondrites. Science 271:1570–1573
Chen M, Xie XD, El Goresy A (1998) Olivine plus pyroxene assemblages in shock veins of the Yanzhuang chondrite: constraints on the history of H-chondrite. Neues Jahrbuch fur Mineralogie—Abhandlungen 3:97–110
Chen M, Xie XD, Wang DD, Wang SC (2002) Metal-troilitemagnetite assemblage in shock veins of Sixiangkou meteorite. Geochim Cosmochim Acta 66:3143–3149
Chen M, Shu JF, Xie XD, Mao H-K (2003a) Natural CaTi2O4-structured FeCr2O4 polymorph in the Suizhou meteorite and its significance in mantle mineralogy. Geochim Cosmochim Acta 67:3937–3942
Chen M, Shu JF, Mao H-K, Xie XD, Hemley RJ (2003b) Natural occurrence and synthesis of two new postspinel polymorphs of chromite. Proc Natl Acad Sci 100:14651–14654
Downs RT (2006) The RRUFF project: an integrated study of the chemistry, crystallography, Raman and infrared spectroscopy of minerals. In: Program and abstracts of the 19th general meeting of the international mineralogical association in Kobe, Japan, pp 03–13
Fredriksson K, DeCarli PS, Aaramäe A (1963) Shock induced veins in chondrites. In: Priester W (ed) Space research III. North-Holland Publishing Company, Amsterdam, The Netherlands, pp 973–983
Fuchs LH (1969) The phosphate mineralogy of meteorites. In: Millman PM (ed) Meteorite research. D. Reidel Pub. Co., Dordrecht, The Netherlands, pp 683–695
Gillet P, Chen M, Dubrovinsky L, El Goresy A (2000) Natural NaAlSi3O8—Hollandite in the Sixiangkou meteorite. Science 287:1633–1637
Kong P, Xie XD (2003) Redistribution of elements in the heavily shocked Yanzhuang chondrite. Meteorit Planet Sci 38:739–746
Leroux H, Doukhan JC, Guyot F (2000) Metal-silicate interaction in quenched shock-induced melt of the Tenham L6-chondrite. Earth Planet Sci Lett 179:477–487
Lodzinski M, Sitarz M (2009) Chemical and spectroscopic characterization of some phosphate accessory minerals from pegmatites of the Sowie Gory Mts, SW Poland. J Mol Struct 924–926:442–447
Olsen EJ, Fredriksson K (1966) Phosphates in iron and pallasite meteorites. Geochim Cosmochim Acta 30:459–470
Olsen EJ, Steele IM (1993) New alkali phosphates and their associations in the IIIAB iron meteorites. Meteoritics 28:415
Olsen EJ, Steele IM (1994) Lithophile element diffusion profiles in phosphate phases in IIIAB iron meteorites: a clue to the trace lithophiles in metal during core formation. In: Proceedings of the 25th lunar and planetary science conference, pp 1025–1026
Olsen EJ, Steele IM (1997) Galileiite: a new meteoritic phosphate mineral. Meteorit Planet Sci 32:A155–A156
Price GD, Putnis A, Agrell S (1979) Electron petrography of shock-produced veins in the Tenham chondrite. Contrib Miner Petrol 71:211–218
Rubin AE (1985) Impact melt products of chondritic material. Rev Geophys 23:277–300
Rubin AE (1997) Mineralogy of meteorite groups. Meteorit Planet Sci 32:231–247
Scott ERD (1982) Origin of rapidly solidified FeNi–FeS grains in chondrites and iron meteorites. Geochim Cosmochim Acta 46:813–823
Semeneko VP, Perron C (2005) Shock-melted material in the Krymka LL3.1 chondrite: behavior of the opaque minerals. Meteorit Planet Sci 40:173–185
Sharp TG, Lingemann CM, Dupas C, Stöffler D (1997) Natural occurrence of MgSiO3-ilmenite and evidence for MgSiO3–perovskite in a shocked L chondrite. Science 277:352–255
Smith BA, Goldstein JI (1977) The metallic microstructures and thermal histories of severely reheated chondrites. Geochim Cosmochim Acta 44:1062–1072
Stöffler D, Keil K, Scott ERD (1991) Shock metamorphism of ordinary chondrites. Geochim Cosmochim Acta 55:3845–3867
Taylor GJ, Heymann D (1971) Postshock thermal history of reheated chondrites. J Geophys Res 76:1879–1893
Urakawa S, Kato M, Kumazawa M (1987) Experimental study on the phase relations in the system Fe–Ni–O–S up to 15 GPa. In: Manghnani MH, Syono Y (eds) High pressure research in mineral physics. Terra Science, Tokyo, Japan, pp 95–111.
Xie XD, Chen M (2018) Yanzhuang meteorite: mineralogy and shock metamorphism. In: Guangdong Science & Technology Press, Guangzhou, p 202 (in Chinese with English abstract)
Xie XD, Li ZH, Wang DD, Liu JF, Hu RY, Chen M (1991) The new meteorite fall of Yanzhuang, a severely shocked H6 chondrite with black molten materials. Meteoritics 26:411
Xie XD, Li ZH, Wang DD, Liu JF, Hu RY, Chen M (1994) The new meteorite fall of Yanzhuang, a severely shocked H6 chondrite with black molten materials. Chin J Geochem 12:39–46
Xie XD, Chen M, Dai CD, El Goresy A, Gillet P (2001) A comparative study of naturally and experimentally shocked chondrites. Earth Planet Sci Lett 187:345–356
Xie XD, Minitti ME, Chen M, Wang DQ, Mao H-K, Shu JF, Fei YW (2002) Natural high-pressure polymorph of merrillite in the shock vein of the Suizhou meteorite. Geochim Cosmochim Acta 66:2439–2444
Xie XD, Sun ZY, Chen M (2011) The distinct morphological and petrological features of shock melt veins in the Suizhou L6 chondrite. Meteorit Planet Sci 46:459–469
Xie XD, Zhai SM, Chen M, Yang HX (2013) Tuite, γ-Ca3(PO4)2, formed by chlorapatite decomposition in a shock vein of the Suizhou L6 chondrite. Meteorit Planet Sci 48:1515–1523
Xie XD, Chen M, Zhai SM, Wang FY (2014) Eutectic metal + troilite + Fe-Mn-Na phosphates + Al-free chromite assemblage in shock-produced chondritic melt of the Yanzhuang chondrite. Meteoritics & Planetary Sciences 49:2290–2304
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2020 Guangdong Science & Technology Press Co., Ltd and Springer Nature Singapore Pte Ltd.
About this chapter
Cite this chapter
Xie, X., Chen, M. (2020). Fe–Mn–Na Phosphates and Al-Free Chromite in the Metal-Troilite Eutectic Nodule. In: Yanzhuang Meteorite: Mineralogy and Shock Metamorphism. Springer, Singapore. https://doi.org/10.1007/978-981-15-0735-9_10
Download citation
DOI: https://doi.org/10.1007/978-981-15-0735-9_10
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-15-0734-2
Online ISBN: 978-981-15-0735-9
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)