 | | Journal (article/letter/editorial) | | at http://meteoritics.org Cooling of the Kärdla impact crater: I. The mineral paragenetic sequence observation...Institute of Geology, Vanemuise 46, Tartu 51014, Estonia *Corresponding author. E-mail: evelin.versh@ut...Abstract–The impact-induced hydrothermal system in the well-preserved, 4 km-diameter Kärdla impact crater on Hiiumaa...Hiiumaa Island, western Estonia, was investigated by means of mineralogical, chemical, and stable C and...evolutionary stages in the development of the post-impact hydrothermal system: 1) an early vapor-dominated |  | JÕELEHT, Argo, KIRSIMÄE, Kalle, PLADO, Jüri, VERSH, Evelin, IVANOV, Boris (2005) Cooling of the Kärdla impact crater: II. Impact and geothermal modeling. Meteoritics & Planetary Science, 40 (1) 21-33 doi:10.1111/j.1945-5100.2005.tb00362.x | Journal (article/letter/editorial) | | http://meteoritics.org Cooling of the K‰rdla impact crater: II. Impact and geothermal modeling Argo JÕELEHT1...University of Tartu, Vanemuise 46, Tartu 51014, Estonia of Dynamics of Geospheres, Russian Academy of Sciences...2004; revision accepted 8 December 2004) Abstract–Impact and geothermal modeling was performed to explain...alteration in a 4 km marine complex crater at K‰rdla, Estonia. The impact modeling was used to simulate the...the formation of the crater and the post-impact temperature distribution in crater environment. The geothermal |  | PUURA, V., HUBER, H., KIRS, J., KÄRKI, A., SUUROJA, K., KIRSIMÄE, K., KIVISILLA, J., KLEESMENT, A., KONSA, M., PREEDEN, U., SUUROJA, S., KOEBERL, C. (2004) Geology, petrography, shock petrography, and geochemistry of impactites and target rocks from the Kärdla crater, Estonia. Meteoritics & Planetary Science, 39 (3) 425-451 doi:10.1111/j.1945-5100.2004.tb00103.x | Journal (article/letter/editorial) | | of impactites and target rocks from the Kärdla crater, Estonia V. PUURA,1* H. HUBER,2† J. KIRS,1 A. KÄRKI...University of Tartu, Vanemuise street 46, 51014 Tartu, Estonia of Geological Sciences, University of Vienna, Althanstrasse...Finland 4Geological Survey of Estonia, Kadaka tee 80/82, 12618 Tallinn, Estonia 5Institute of Geology, Tallinn...Tallinn Technical University, Estonia pst. 7, 10143 Tallinn, Estonia †Present address: Institute of Geophysics...Abstract–The Kärdla crater is a 4 km-wide impact structure of Late Ordovician age located on Hiiumaa Island, Estonia |  | | Journal (article/letter/editorial) | | alteration at the Lonar Lake impact structure, India: Implications for impact cratering on Mars Justin J...Abstract–The 50,000 year old, 1.8 km diameter Lonar crater is one of only two known terrestrial craters to...cores drilled into the Lonar crater floor show that there are basaltic impact breccias that have been altered...altered by post-impact hydrothermal processes to produce an assemblage of secondary alteration minerals...we conclude that the Lonar crater represents a lower size limit for impact-induced hydrothermal activity |  | | Journal (article/letter/editorial) | | online at http://meteoritics.org Impact melt rocks from the Paasselkä impact structure (SE Finland): Petrography...melt rocks from the ∼10 km and ≤1.9 Ga Paasselkä impact structure, SE Finland, were obtained. In this study...geochemical description of clast-rich Paasselkä impact melt rocks. Shock metamorphic features comprise...altered. The geochemical composition of the Paasselkä impact melt rocks is roughly consistent with the compositions...compositions of melt rocks from a number of impact structures located within the crystalline basement of |  | | Book | | . . . Evidence of Ancient Microbial Life in an Impact Structure and Its Implications for Astrobiology:...environments, but also speculate on the possible impact on the society of such discoveries. All these activities...such an interplanetary journey and the shock of an impact would certainly eradicate any living cell. “Lithopanspermia”...lichens are sandwiched between gabbro discs and impact shock pressures are simulated, apparently determining...collision and meteoritic interplanetary travel and impact. For this reason Panspermia both ways is not an |
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