The formation of peak rings in large impact craters
Por:
Morgan, Joanna V., Gulick, Sean P. S., Bralower, Timothy, Chenot, Elise, Christeson, Gail, Claeys, Philippe, Cockell, Charles S., Collins, Gareth S., Coolen, Marco J. L., Ferriere, Ludovic, Gebhardt, Catalina, Goto, Kazuhisa, Jones, Heather, Kring, David A., Le Ber, Erwan, Lofi, Johanna, Long, Xiao, Lowery, Christopher, Mellett, Claire, Ocampo-Torres, Ruben, Osinski, Gordon R., Perez-Cruz, Ligia, Pickersgill, Annemarie, Poelchau, Michael, Rae, Auriol, Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, Honami, Schmitt, Douglas R., Smit, Jan, Tikoo, Sonia, Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Whalen, Michael, Wittmann, Axel, Yamaguchi, Kosei E., Zylberman, William
Publicada:
18 nov 2016
Resumen:
Large impacts provide a mechanism for resurfacing planets through mixing
near-surface rocks with deeper material. Central peaks are formed from
the dynamic uplift of rocks during crater formation. As crater size
increases, central peaks transition to peak rings. Without samples,
debate surrounds the mechanics of peak-ring formation and their depth of
origin. Chicxulub is the only known impact structure on Earth with an
unequivocal peak ring, but it is buried and only accessible through
drilling. Expedition 364 sampled the Chicxulub peak ring, which we found
was formed from uplifted, fractured, shocked, felsic basement rocks. The
peak-ring rocks are cross-cut by dikes and shear zones and have an
unusually low density and seismic velocity. Large impacts therefore
generate vertical fluxes and increase porosity in planetary crust.
Filiaciones:
Morgan, Joanna V.:
Imperial Coll London, Dept Earth Sci & Engn, London SW7 2AZ, England
Gulick, Sean P. S.:
Univ Texas Austin, Inst Geophys, Jackson Sch Geosci, Austin, TX 78758 USA
Bralower, Timothy:
Penn State Univ, Dept Geosci, University Pk, PA 16802 USA
Chenot, Elise:
Univ Bourgogne Franche Comte, UMR CNRS 6282, Biogeosci Lab, F-21000 Dijon, France
Christeson, Gail:
Univ Texas Austin, Inst Geophys, Jackson Sch Geosci, Austin, TX 78758 USA
Claeys, Philippe:
Vrije Univ Brussel, Analyt Environm & Geochem, Pl Laan 2, B-1050 Brussels, Belgium
Cockell, Charles S.:
Univ Edinburgh, Sch Phys & Astron, Ctr Astrobiol, Edinburgh EH9 3FD, Midlothian, Scotland
Collins, Gareth S.:
Imperial Coll London, Dept Earth Sci & Engn, London SW7 2AZ, England
Coolen, Marco J. L.:
Curtin Univ, WA Organ & Isotope Geochem Ctr WA OIGC, Dept Chem, Bentley, WA 6102, Australia
Ferriere, Ludovic:
Nat Hist Museum, Burgring 7, A-1010 Vienna, Austria
Gebhardt, Catalina:
Alfred Wegener Inst Helmholtz Ctr Polar & Marine, D-27568 Bremerhaven, Germany
Goto, Kazuhisa:
Tohoku Univ, Int Res Inst Disaster Sci, Aoba Ku, 468-1 E303, Sendai, Miyagi 9800845, Japan
Jones, Heather:
Penn State Univ, Dept Geosci, University Pk, PA 16802 USA
Kring, David A.:
Lunar & Planetary Inst, 3600 Bay Area Blvd, Houston, TX 77058 USA
Le Ber, Erwan:
Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England
Lofi, Johanna:
Univ Montpellier, Geosci Montpellier, F-34095 Montpellier 05, France
Long, Xiao:
China Univ Geosci, Sch Earth Sci, Planetary Sci Inst, 388 Lumo Rd, Wuhan, Peoples R China
Lowery, Christopher:
Univ Texas Austin, Inst Geophys, Jackson Sch Geosci, Austin, TX 78758 USA
Mellett, Claire:
British Geol Survey, Lyell Ctr, Res Ave South, Edinburgh EH14 4AP, Midlothian, Scotland
Ocampo-Torres, Ruben:
UMR 7515 Univ Strasbourg CNRS, Grp Phys Chim Atmosphere, Inst Chim & Proc Energie Environm & Sante, 1 Rue Blessig, F-67000 Strasbourg, France
Osinski, Gordon R.:
Univ Western Ontario, Ctr Planetary Sci & Explorat, London, ON N6A 5B7, Canada
Univ Western Ontario, Dept Earth Sci, London, ON N6A 5B7, Canada
Univ Western Ontario, Dept Phys & Astron, London, ON N6A 5B7, Canada
Perez-Cruz, Ligia:
Univ Nacl Autonoma Mexico, Inst Geofis, Cd Univ,Coyoacan Ciudad Mexico, Mexico City 04510, DF, Mexico
Pickersgill, Annemarie:
Univ Glasgow, Sch Geog & Earth Sci, Lilybank Gardens, Glasgow G12 8QQ, Lanark, Scotland
Poelchau, Michael:
Univ Freiburg, Geol, Albertstr 23b, D-79104 Freiburg, Germany
Rae, Auriol:
Imperial Coll London, Dept Earth Sci & Engn, London SW7 2AZ, England
Rasmussen, Cornelia:
Univ Utah, Dept Geol & Geophys, 115 S 1460 E FASB, Salt Lake City, UT 84112 USA
Rebolledo-Vieyra, Mario:
Ctr Invest Cient Yucatan AC, Unidad Ciencias Agua, Cancun 77500, Quintana Roo, Mexico
Riller, Ulrich:
Univ Hamburg, Inst Geol, Bundesstr 55, D-20146 Hamburg, Germany
Sato, Honami:
Japan Agcy Marine Earth Sci & Technol, 2-15 Natsushima Cho, Yokosuka, Kanagawa 2370061, Japan
Schmitt, Douglas R.:
Univ Alberta, Dept Phys, Edmonton, AB T6G 2E1, Canada
Smit, Jan:
Vrije Univ Amsterdam, Fac Earth & Life Sci FALW, Boelelaan 1085, NL-1018 HV Amsterdam, Netherlands
Tikoo, Sonia:
Rutgers Univ New Brunswick, Earth & Planetary Sci, Piscataway Township, NJ 08854 USA
Tomioka, Naotaka:
Japan Agcy Marine Earth Sci & Technol, Kochi Inst Core Sample Res, 200 Monobe Otsu, Nankoku, Kochi 7838502, Japan
Urrutia-Fucugauchi, Jaime:
Univ Nacl Autonoma Mexico, Inst Geofis, Cd Univ,Coyoacan Ciudad Mexico, Mexico City 04510, DF, Mexico
Whalen, Michael:
Univ Alaska, Dept Geosci, 900 Yukon Dr, Fairbanks, AK 99775 USA
Wittmann, Axel:
Arizona State Univ, LeRoy Eyring Ctr Solid State Sci Phys Sci, Tempe, AZ 85287 USA
Yamaguchi, Kosei E.:
Toho Univ, Dept Chem, Funabashi, Chiba 2748510, Japan
NASA, Astrobiol Inst, Mountain View, CA USA
Zylberman, William:
Univ Western Ontario, Ctr Planetary Sci & Explorat, London, ON N6A 5B7, Canada
Aix Marseille Univ, CNRS, Inst Rech & Dev, Coll France, Aix En Provence, France
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