Petrography of the Baszkówka chondrite

• Autorzy: Siemiątkowski J.
• Języki publikacji: EN

Abstrakty

EN

The Baszkówka chondrite comprises chondrules, individual crystals of olivine, xenomorphic concentrations of kamacite and troilite, matrix and pores up to 3.0 mm in diameter; porosity reaches 20% by volume. Measurements of 697 chondrules in an area of 250 m2 enabled distinction of three populations. The chondrules and olivine crystals have been sintered at high temperatures. Six structural types showing transitions between porphyritic and granular structures have been discriminated. Rims showing a similar diversity surround about 10% of chondrules. The composition and structure of the chondrules suggest a source from the nebular dust disk around the Sun. The abudance of voids and their relatively large size and a lack of fissures, indicate a small size of the host body, which must have been derived from an early phase of protoplanet formation.

Słowa kluczowe

EN

Baszkówka; ordinary chondrites; chondrules; structure; petrography; classification; origin

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Geological Quarterly
• Rocznik: 2001
• Tom: Vol. 45, No 3
• Strony: 263--280
• Opis fizyczny: Bibliogr. 38 poz., fot., tab., wykr.

Twórcy

autor

Siemiątkowski J.

• Lower Silesian Branch, Polish Geological Institute, Jaworowa 19, PL-53-122 Wrocław, Poland

Bibliografia

• 1. BARYSHNIKOVA G. V., STAKHEEV S. A., IGNATIEVA K. I., LAVRENTIEVA A. K. and LAVRUKHINA A. K. (1991) - Khondry khondryta Kainsaz CO: sostav silikatnykh mineralov, ikh assocjacij i sravnene s khondrami drugikh uglistykh i obyknavennykh khondritov. Meteoritika, 50: 37-51.
• 2. BORUCKI J. and STĘPNIEWSKI M. (2001) - Mineralogy of the Baszkówka chondrite (L5S1): new data on silicates, opaques and minor minerals. Geol. Quart., 45 (3): 229-255.
• 3. BOSS A. P. (1996) - A concise guide to chondrule formation models. In: Chondrules and the Protoplanetary Disk (eds. R. H. Hewins, R. D. Jones and E. R. D. Scott): 257-263. Cambridge Univ. Press.
• 4. CONSOLMAGNO G. J. and BRITT D. T. (1998) - The density and porosity of meteorites from the Vatican collection. Meteor. Planet. Sc., 33: 1231-1241.
• 5. FLYNN G. J., MOORE L. B. and KLOCK W. (1999) - Density and porosity, cratering, and collisional disruption of asteroid. Icarus, 142: 97-105.
• 6. GOODING J. L. and KEIL K. (1981) - Relative abundances of chondrule primary textural types in ordinary chondrites and their bearing on conditions of chondrule formation. Meteoritics, 16:17-43.
• 7. GROSSMAN J. N. (1998) - Saharan meteorites from: Libya and Niger. Meteor. Bull., 82. Meteor. Planet. Sc., 33: A227-A234.
• 8. GROSSMAN J. N. and SCORE R. (1996) - Recently classified specimens in the United States Antarctic Collection (1994-1996). Meteor. Bull., 79. Meteor. Planet. Sc., 31: A161-A174.
• 9. HEIDE F. and WLOTZKA F. (1994) - Meteorites. Messenger from Space. Springer Verlag. Berlin.
• 10. HORII Y., FUIJ N. and TAKEDA H. (1990) - Hardness analysis of metallic particles in ordinary chondrites. Proc. NIPR, Symp. Antarctic Meteorites, 3: 254-263.
• 11. HOOD L. L. and KRING D. A. (1996) - Models for multiple heating mechanisms. In: Chondrules and Protoplanetary Disk (eds. R. H. Hewins, R. D. Jones and E. R. D. Scott): 265-276. Cambridge Univ. Press.
• 12. HUANG S. and SEARS D. W. G. (1997) - Formation and metamorphism of group A5 chondrules in ordinary chondrites. Geochim. Cosmochim. Acta, 61 (21): 4689-4704.
• 13. HUGHES D. W. (1978) - A disaggregation and thin section analysis of the size and mass distribution of the chondrules in the Bjurböle and Chainpur meteorites. Earth. Planet. Sc. Lett., 119: 569-584.
• 14. KITAMURA M. and WATANABE S. (1985) - Adhesive growth and abrasion of chondrules during the acreation process. Mem. NIPR, Spec. Issue, 41: 22-234.
• 15. KROT A. N., IVANOVA M. A. and WASSON J. T. (1993) - The origin of chromitic chondrules and the volatility of Cr under a range of nebular conditions. Earth Planet. Sc. Lett., 119: 569-584.
• 16. MATSUI T., HOMANO Y. and HONDA M. (1980) - Porosity and compressional-weve velocity measure of Antarctic meteorites. Mem. NIPR, Spec. Issue, 17: 268-275.
• 17. MANECKI A. (1972) - Mineralogical and petrographical study of the Pułtusk meteorite (in Polish with English summary). Pr. Miner. Komis. Nauk Miner. PAN Kraków, 27: 53-65.
• 18. METZLER K. and BISCHOFF A. (1996) - Constraints an chondrite agglomeration from fine-grained chondrules rims. In: Chondrules and Protoplanetary Disk (eds. R. H. Hewins, R. D. Jones and E. R. D. Scott):153-161. Cambridge Univ. Press.
• 19. NAGAHARA H. (1981) - Petrology of chondrules in ALH -77015 (L3) chondrite. Mem. NIPR, Spec. Issue, 20: 145-160.
• 20. NAGAHARA H. (1983a) - Texture of chondrules. Mem. NIPR, Spec. Issue, 30: 71-83.
• 21. NAGAHARA H. (1983b) - Chondrules formed through incomplete melting of the pre-existing mineral dusters and the origin of chondrules. In: Chondrules and their Origin: 211-222. Houston.
• 22. RAMDOHR P. (1967) - Chromite and chromite chondrules in meteorite. Geochim. Cosmochim. Acta, 31:1961-1967.
• 23. RAMDOHR P. (1973) - The Opaque Minerals in Stony Meteorites. Berlin.
• 24. RUBIN A. and KROT A. N. (1996) - Multiple heating of chondrules. In: Chondrules and the Protoplanetary Disk (eds. R. H. Hewins, R. D. Jones and E. R. D. Scott): 173-180. Cambridge Univ. Press.
• 25. SCOTT E. R. D. and TAYLOR G. J. (1983) - Chondrules and other components in C, O, and E chondrites: similarites in their properties and origin. J. Geophys. Res., suppl., 88: B275-B286.
• 26. SCOTT E. R. D., TAYLOR G. F. and KEIL K. (1986) - Accretion, metamorphism, and brecciation of ordinary chondrites: evidence from petrological studies of meteorites from Roosevelt County, New Mexico. J. Geophys. Res., 91: E115-E123.
• 27. SEARS D. W. G., HUANG S. and BENOIT P. H. (1995) - Chondrule formation, metamorphism, brecciated an important new primary chondrule group and the classification of chondrules. Earth. Planet. Sc. Lett., 131 (1-2): 27-39.
• 28. SIEMIĄTKOWSKI J. (1998) - Petrografia chondrytu Baszkówka. Pol. Tow. Miner., Pr. Spec., 11: 160-161.
• 29. SOBOTOVICH E. V., SEMENENKO V. P. (1984) - Veschestvo meteoritov. Naukova Dumka. Kijev.
• 30. SORBY H. C. (1864) - On the microscopical structure of meteorites. Proc. Roy. Soc., 13: 333-334.
• 31. SORBY H. C. (1877) - On the structure and origin of meteorites. Nature, 15: 495-498.
• 32. STĘPNIEWSKI M., BORUCKI J. and SIEMIĄTKOWSKI J. (1998a) - New data on the L5(S1) chondrite Baszkówka (Poland). 61th Meteoritical Society Meeting, July 27-31,1998, Trinity College, Dublin. Meteor. Planet. Sc., suppl., 33 (4): A150-A151.
• 33. STĘPNIEWSKI M., SIEMIĄTKOWSKI J., BORUCKI J. and RADLICZ K. (1998b) - Fall, recovery and preliminary study of the Baszkówka meteorite (Poland). Arch. Miner., 51 (1-2): 131-152.
• 34. TSCHERMAK G. (1885) - The microscopic properties of meteorites. Smithson. Cont. Astroph., 4 (6).
• 35. WASSON J. T. (1993) - Constrains on chondrule origins. Meteoritics, 24: 14-28.
• 36. WEISBERG M. K. (1987) - Barred olivine chondrules in ordinary chondrites. J. Geophys. Res., 92 (4): E663-E678.
• 37. YANAI K. and KOIJMA H. (1991) - Yamato - 74 063: chondritic meteorite classified between E and H chondritic groups. Proc. NIPR, Symp. Antarctic Meteorites, 4: 118-130.
• 38. ŻELAŹNIEWICZ A. (1987) - On the Benghazi meteorite. Acta Univ. Wratisl., 788. Pr. Geol. Miner., 10: 91-97.