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Ground truth for oblique impact processes: New insight from the Rio Cuarto, Argentina, crater field

1994; Geological Society of America; Volume: 22; Issue: 10 Linguagem: Inglês

10.1130/0091-7613(1994)022 2.3.co;2

1943-2682

P. H. Schultz, Christian Koeberl, T. E. Bunch, J. A. Grant, William Collins,

Geological and Geochemical Analysis

Research Article| October 01, 1994 Ground truth for oblique impact processes: New insight from the Rio Cuarto, Argentina, crater field Peter H. Schultz; Peter H. Schultz 1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912 Search for other works by this author on: GSW Google Scholar Christian Koeberl; Christian Koeberl 2Institute of Geochemistry, University of Vienna, A-1010 Vienna, Austria Search for other works by this author on: GSW Google Scholar Theodore Bunch; Theodore Bunch 3NASA Ames Research Center, Moffett Field, California 94035 Search for other works by this author on: GSW Google Scholar John Grant; John Grant 1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912 Search for other works by this author on: GSW Google Scholar William Collins William Collins 1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912 Search for other works by this author on: GSW Google Scholar Geology (1994) 22 (10): 889–892. https://doi.org/10.1130/0091-7613(1994)022 2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Peter H. Schultz, Christian Koeberl, Theodore Bunch, John Grant, William Collins; Ground truth for oblique impact processes: New insight from the Rio Cuarto, Argentina, crater field. Geology 1994;; 22 (10): 889–892. doi: https://doi.org/10.1130/0091-7613(1994)022 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract New evidence for an impact origin of oblong rimmed depressions near Rio Cuarto, Cordoba Province, Argentina, includes shocked silicate phases (e.g., diaplectic glass), thermal decomposition of high-temperature mineral clasts (e.g., baddeleyite from zircon), rapid quenching, very low water contents (≤0.1 wt%), and generation of identical glasses in hypervelocity laboratory impact experiments. The results indicate that glasses with a wide range in major element concentrations can form from a single target type in a relatively small impact event. Impact glasses with the greatest volatile loss typically exhibit the greatest meteoritic contamination (as defined by Cr, Ni, and Ir abundances). The different impact glass types and the different degrees of impactor contamination are proposed to reflect proximity to the projectile-target interface during shallow penetration in an oblique impact, consistent with laboratory simulations and planetary analogues. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.