Suevit (impaktyt) w kolekcji meteorytów dr. Jacka Siemiątkowskiego

• Authors: Agata Krzesińska

Title variants

EN

Suevite in the Jacek Siemiątkowski Collection

• Languages of publication: PL

Abstracts

EN

Petrographic and microtextural analyses were done on the thin section of an impactite from the Jacek Siemiątkowski Collection of Meteorites (ING PAN OB Wrocław). Two types of textures, crystalline and glassy are distinguishable. In each of them, mineral and rock fragments are deformed in different way and to various degree. One can distinguish: biotite kink bands, irregularly fractured quartz grains, twins of feldspar crystals. Moreover there are visible textures such as planar deformation features in quartz and feldspar grains, diaplectic and polymineral – lechatelierytic glasses. All the observed textures may testify the origin of the rock. The slightly deformed fragments and strongly deformed ones developed during the compression phase of the crater formation at different distance from a projectile and the crater centre. This event was followed by excavation of deformed material and its redeposition in the crater filling. The rock was recrystallised afterwards, which is inferred from the presence of the decorated PDFs and subgrains in some dynamically recrystallised quartz grains.

Keywords

EN

impactite; metastability; meteorites; shock metamorphism; suevite

Discipline

• GEOPHYSICS: GEOPHYSICS

• Publisher: Polskie Towarzystwo Meteorytowe
• Journal: Acta Societatis Metheoriticae Polonorum
• Year: 2011
• Volume: 2
• Pages: 85-91

Contributors

author

Agata Krzesińska

• Instytut Nauk Geologicznych Polskiej Akademii Nauk, Ośrodek Badawczy we Wrocławiu

References

• Dressler B.O., Sharpton V.L., 1997. Breccia formation at a complex impact crater: Slate Islands, Lake Superior, Ontario, Canada. Tectonophysics, 275: 285–311.
• French B.M., 1998. Traces of Catastrophe: A Handbook of Shock–Metamorphic Effects in Terrestrial Meteorite Impact Structures. Lunar and Planetary Institute. 120 pp.
• Goltrant O., Leroux H., Doukhan J.-C., Cordier P., 1992. Formation mechanisms of planar deformation features in naturally shocked quartz. Phys. Earth Planet. Inter., 74: 219–240.
• Hörz F., Grieve R.A.F., Heiken G., Spudis P., Bindler A., 1991. Lunar surface processes. Lunar Sourcebook: A User’s Guide to the Moon (Heiken G.H., Vaniman D.T. i French B.M., eds). Cambridge Univ., New York.
• Passchier C.W., Trouw R.A.J., 1994. Microtectonics. Springer. 289 pp.
• Przybylski B., Badura J., 2004. Czy struktury koliste w Sudetach mogą mieć genezę uderzeniową? Przegląd Geologiczny 52: 971– 978.
• Reimold W.U., Koebler C., Brandt D., 1997. Suevite at the Roter Kamm crater, Namibia. Met. and Planet. Sci. 32: 431–437.
• Robertson P.B., Dense M.R., Vos M.A., 1968. Deformation in rock-forming minerals from Canadian craters. Shock Metamorphism of Natural Materials French B.M. i Short N.M. (eds), Monografia. Baltimore.
• Serebrennikov A.I., Valter A.A., Mashkovtsev R.I., Scherbakova M.Y., 1982. The investigation of defects in shock-metamorphosed quartz. Phys Chem Minerals 8: 153–157.
• Singleton A.C., Osinski G.R., Moser D., 2009. A comparative Analysis of the Effects of Shock Metamorphism on Selected Minerals from Crystalline Rocks. Abstract #5383 72nd Annual Meeting of the Meteoritical Society.
• Stöffler D., 1971. Progressive metamorphism and classification of shocked and brecciated crystalline rocks at impact craters. J. Geoph Res., 76: 5541–5551.
• Stöffler D., 1974. Deformation and transformation of rock forming minerals by natural and experimental shock processes: II. Physical properties of shocked minerals. Fortschr. Mineral. 51: 256–289.
• Stöffler D., 1984. Glasses formed by hypervelocity impact. J. Non-Crystall. Solids 67: 465–502
• Von Engelhardt W., 1997: Suevite breccia of the Ries impact crater, Germany: Petrography, chemistry, and shock metamorphism of crystalline rock clasts. Met and Planet Sci. 32: 545–554.

• Document Type: article