 | | 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 |  | 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 |  | PETERSEN, Michael T., NEWSOM, Horton E., NELSON, Melissa J., MOORE, Duane M. (2007) Hydrothermal alteration in the Bosumtwi impact structure: Evidence from 2M1-muscovite, alteration veins, and fracture fillings. Meteoritics & Planetary Science, 42 (4) 655-666 doi:10.1111/j.1945-5100.2007.tb01066.x | Journal (article/letter/editorial) | | http://meteoritics.org Hydrothermal alteration in the Bosumtwi impact structure: Evidence from 2M1-muscovite, alteration... Abstract–Drill-core samples from the Bosumtwi impact structure (1.07 Myr old and 10.5 km in diameter)...in Ghana exhibit mineralogical evidence for post-impact hydrothermal alteration. Nine samples of drill...are rich in 2M1-muscovite, consistent with post-impact fluid deposition and alteration. Optical analysis...analysis indicates the presence of a pre-impact stratiform chlorite in meta-graywacke samples and a secondary |  | | Journal (article/letter/editorial) | | from the Yaxcopoil-1 drill core in the Chicxulub impact structure Horton E. NEWSOM1*, Melissa J. NELSON1...concentrations in the upper suevite impact breccias than in the lower impact melt deposits by factors of 3...large terrestrial impact structures such as the Sudbury structure, the Ries crater, the Manson structure... Aqueous and hydrothermal processes in Martian impact craters may have contributed to the mobile element...in association with the impact melt deposits on the crater floor, at the crater rim, in the central uplift |  | Simpson, S.L., Osinski, G.R., Longstaffe, F.J., Schmieder, M., Kring, D.A. (2020) Hydrothermal alteration associated with the Chicxulub impact crater upper peak-ring breccias. Earth and Planetary Science Letters, 547. 116425pp. doi:10.1016/j.epsl.2020.116425 | Journal (article/letter/editorial) | | Hydrothermal alteration associated with the Chicxulub impact crater upper peak-ring breccias S.L. Simpson a,∗ ,...McKinnon Keywords: Chicxulub impact impact generated hydrothermal systems impact cratering astrobiology a...a b s t r a c t The 66 Ma, ∼180 km Chicxulub impact structure in the northern Yucatán peninsula and southern...Gulf of Mexico is the best-preserved large impact crater on Earth with a well-developed peak ring. The...layer of impact melt rocks (Units 3A and B); melt-bearing breccias (Units 2A–C); and post-impact sedimentary |
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