ICAME 2007 pp 897-904 | Cite as

Mössbauer studies on impactites from Lonar impact crater

Conference paper


Iron mineralogy has been studied using Mössbauer spectroscopy on eight glassy impactite samples from different parts of the Lonar Crater Rim Region. Distinct changes are observed when compared to the host basaltic samples. Significant amount of Fe3 +  phase is observed in the impactite samples whereas this phase is known to be almost absent in the basalt. Besides this we have a strong Fe2 +  doublet showing up corresponding to the main iron-containing mineral. The Mössbauer results are very similar to those with glasses from Ries crater which is also believed to have formed by meteoritic impact but on nonbasaltic rock bed. Besides the glassy samples, we also study some spherules found in the crater region and some fine glassy particles on the surfaces of melt impact bombs. These contain a good amount of magnetically ordered phase, most likely nanosize hematite. Interestingly, part of it is strongly attracted by a magnet and part of it is not. But both parts show a significantly strong six-line component corresponding to hematite.


Mössbauer studies Impactites Lonar impact crater 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Fredriksson, K., Noonan, A., Nelen, J.: Meteoritic, lunar and lonar impact chondrules. Earth Moon Planets 7, 475–482 (1973)Google Scholar
  2. 2.
    Nayak, V.: Glassy objects (impactite glasses?)—a possible new evidence for meteoritic origin of the Lonar Crater, Maharashtra State India. Earth Planet. Sci. Lett. 14, 1–6 (1972)CrossRefADSGoogle Scholar
  3. 3.
    Fredriksson, K., Dube, A., Milton, D.J., Balasundram, M.S.: Lonar Lake, India: an impact crater in Basalt. Science 180, 862–864 (1973)CrossRefADSGoogle Scholar
  4. 4.
    Sengupta, D., Bhandari, N., Watanabe, S.: Formation age of lonar meteor Crater, India. Revista Aplicada Instrumentacao 12, 1–7 (1997)Google Scholar
  5. 5.
    Hofmann, C., Féraud, G., Courtillot, V., Hofman, C.: 40Ar/39Ar dating of mineral separates and whole rocks from the Western Ghats lava pile: further constraints on duration and age of the Deccan traps. Earth Planet. Sci. Lett. 180, 13–27 (2000)CrossRefADSGoogle Scholar
  6. 6.
    Pande, K., Pattanayak, S.K., Subbarao, K.V., Navaneethakrishnan, P., Venkatesan, T.R.: 40Ar–39Ar age of a lava flow from the Bhimashankar formation, Giravali Ghat, Deccan Traps. J. Earth Syst. Sci. 113, 755–758 (2004)CrossRefADSGoogle Scholar
  7. 7.
    Fudali, R.F., Milton, D.J., Fredriksson, K., Dube, A.: Morphology of Lonar Crater, India: comparisons and implications. Earth Moon Planets 23, 493–515 (1980)CrossRefGoogle Scholar
  8. 8.
    Barar, R.: Lonar, a gem of craters. Spark 2, 1 (2000)ADSGoogle Scholar
  9. 9.
    Osae, S., Misra, S., Koberal, C., Sengupta, D., Ghosh, S.: Target rocks, impact glasses, and melt rocks from the Lonar impact crater, India: petrography and geochemistry. Meteor. Planet. Sci. 40, 1473–1492 (2005)ADSCrossRefGoogle Scholar
  10. 10.
    Louzada, K.L., Weiss, B.P., Maloof, A.C., Stewart, S.T., Swanson-Hysell, N.: A paleomagnetic study of Lonar crater, India. Lunar Planet. Sci. XXXVIII, 2344 pdf (2007)ADSGoogle Scholar
  11. 11.
    Thakker, C.D., Ranade, D.R.: An alkalophilic Methanosarcina isolated from Lonar crater. Curr. Sci. 82, 455–458 (2002)Google Scholar
  12. 12.
    Pohl, J., Stöffler, D., Gall, H., Ernstson, K.: The Ries impact crater. In: Roddy, D.J., Pepin, R.O., Merrill, R.B. (eds.) Impact and Explosion Cratering, pp. 343–404. Pergamon, New York (1977)Google Scholar
  13. 13.
    Bhandari, N., Verma, H.C., Upadhyay, C., Tripathi, A., Tripathi, R.P.: Global occurrence of magnetic and super paramagnetic iron phases in Cretaceous Tertiary boundary clays. Geological Soc. Am. Spec. Pap. 356, 201–211 (2002)Google Scholar

Copyright information

© Springer Science + Business Media B.V. 2008

Authors and Affiliations

  1. 1.Department of PhysicsI I T KanpurKanpurIndia
  2. 2.Department of Geology and GeophysicsI I T, KhragpurKharagpurIndia
  3. 3.Geological Oceanography DivisionNational Institute of OceanographyDona PaulaIndia
  4. 4.Department of PhysicsJ.N.V. UniversityJodhpurIndia
  5. 5.Institute of Meteoritics and Department of Earth and Planetary SciencesUniversity of New MexicoAlbuquerqueUSA
  6. 6.Indian Institute of GeomagnetismNavi MumbaiIndia

Personalised recommendations