Advertisement

Comparison of Shock Features in Yanzhuang with Those of Experimentally Shocked Jilin Meteorite

Chapter
  • 104 Downloads

Abstract

Samples of the Jilin H5 chondrite were experimentally shock-loaded at the peak pressures of 12, 27, 39, 53, 78, 83, 93, and 133 GPa. The aim of this study is to compare experimentally shock-induced phenomena with those in naturally shocked Yanzhuang H6 chondrite. Planar fractures, mosaicism, brecciation in olivine and pyroxene, as well as transformation of plagioclase into diaplectic glass were observed in the Jilin samples shocked at pressures lower than 53 GPa. Shock-induced chondritic melts were first obtained at P > 78 GPa and more than 60% of the whole-rock melting was achieved at P ~ 133 GPa, and that shock-induced silicate melt consists of quenched microcrystalline olivine and pyroxene, metal, troilite, and vesicular glass. No high-pressure phases were observed in any of the experimentally shocked samples, neither in the deformed nor in the molten regions. Deformation features in Jilin samples shock-loaded below 53 GPa are comparable to those found in Yanzhuang chondrite. The mineral assemblages in the molten regions in the shocked Jilin samples are also comparable to those encountered in the heavily shocked Yanzhuang chondrite. Based on the experimental study on Jilin samples, the peak pressure and shock temperature for the Yanzhuang unmelted chondritic rock are estimated to be 45–60 GPa and 600–900 °C, and those for the Yanzhuang melted bodies are >60 GPa, and 2000 °C.

Keywords

Yanzhuang chondrite Jilin chondrite Shock-loading experiment Deformation features shock-produced melt P–T condition 

References

  1. Bogard D, Hörz F, Johnson P (1987) Shock effects and argon loss in samples of the Leedey L6 chondrite experimentally shocked to 29–70 GPa pressures. Geochim Cosmochim Acta 51:2035–2044CrossRefGoogle Scholar
  2. Chen M, Xie XD (1996) Na behavior in shock-induced melt phase of Yanzhuang (H6) chondrite. Eur J Mineral 8:325–333CrossRefGoogle Scholar
  3. Chen M, Xie XD (1997) Shock effects and history of the Yanzhuang meteorite: a case different from the L-chondrites. Chin Sci Bull 42:1889–1893CrossRefGoogle Scholar
  4. Chen M, Sharp TG, El Goresy A, Wopenka B, Xie XD (1996a) The majodte-pyrope + magnesiowustite assemblage: constrains on the history of shock veins in chondrites. Science 271:1570–1573CrossRefGoogle Scholar
  5. Chen M, Wopenka B, El Goresy A (1996b) High-pressure assemblages in shock melt vein in the Peace River (L6) chonddte: compositions and pressure– temperature history. Meteoritics 31:A27Google Scholar
  6. Dai CD, Wang DD, Lin X (1991) Shock-loading experimental study of Jilin meteorite. Chin Sci Bull 36:1984–1987Google Scholar
  7. Kimura M, El Goresy A, Suzuki A, Ohtani E (1999) Heavily shocked Antarctic H-chondrites: petrology and shock history. Antarct Meteorites 24:67–68Google Scholar
  8. Kimura M, Suzuki A, Kondo T, Ohtani E, El Goresy A (2000) The first discovery of high-pressure polymorphs, jadeite, hollandite, wadsleyite and majorite, from an H-chondrite Y-75100. Antarct Meteorites 25:41–42Google Scholar
  9. Price GD, Putnis A, Agrell SO (1979) Electron petrography of shock-produced veins in the Tenham chondrite. Contrib Miner Petrol 71:211–218CrossRefGoogle Scholar
  10. Schmitt R, Stöffler D (1995) Experimental data in support of the 1991 shock classification of chondfites. Meteoritics 30:574Google Scholar
  11. Sears DW, Ashworth JR, Broadbent CE (1984) Studies of an artificially shock-loaded H group chondrite. Geochim Cosmochim Acta 48:343–360CrossRefGoogle Scholar
  12. Sharp TG, Chen M, El Goresy A (1997) Mineralogy and microstructures of shock-induced melt veins in the Tenham (L6) chondfite. Lunar Planet Sci 28:1283Google Scholar
  13. Stöffler D, Keil K, Scott ERD (1991) Shock metamorphism of ordinary chondrites. Geochim Cosmochim Acta 55:3845–3867CrossRefGoogle Scholar
  14. Wang DD (1993) Introduction of Chinese meteorites. Science Press, Beijing, p 505 (in Chinese)Google Scholar
  15. Xie XD, Chen M (2016) Suizhou meteorite: mineralogy and shock metamorphism. Springer, Berlin and Guangdong Science & Technology Press, Guangzhou, pp 211–223Google Scholar
  16. Xie XD, Chen M (2018) Yanzhuang meteorite: mineralogy and shock metamorphism. Guangdong Science & Technology Press, Guangzhou, p 202 (in Chinese with English abstract)Google Scholar
  17. 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 187:345–356CrossRefGoogle Scholar
  18. Xie XD, Huang WK (1991) Thermal history of the Jilin and Qiangzhen chondrites. Chin J Geochem 10(2):109–119Google Scholar
  19. 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 12:39–46CrossRefGoogle Scholar
  20. Xie XD, Sun ZY, Chen M (2011) The distinct morphological and petrological features of shock melt veins in the Suizhou L6 chondrite. Meteor Planet Sci 46(3):459–469CrossRefGoogle Scholar
  21. Xie XD, Zhang H (2017) Shock-induced melting and element redistribution of the Yanzhuang chondrite. Geochimica 46:301–309 (in Chinese with English abstract)Google Scholar

Copyright information

© Guangdong Science & Technology Press Co., Ltd and Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhouChina

Personalised recommendations