The formation of peak rings in large impact craters

The formation of peak rings in large impact craters. Morgan, J. V., Gulick, S. P. S., Bralower, T., Chenot, E., Christeson, G., Claeys, P., Cockell, C., Collins, G. S., Coolen, M. J. L., Ferrière, L., Gebhardt, C., Goto, K., Jones, H., Kring, D. A., Ber, E. L., Lofi, J., Long, X., Lowery, C., Mellett, C., Ocampo-Torres, R., Osinski, G. R., Perez-Cruz, L., Pickersgill, A., Poelchau, M., Rae, A., Rasmussen, C., Rebolledo-Vieyra, M., Riller, U., Sato, H., Schmitt, D. R., Smit, J., Tikoo, S., Tomioka, N., Urrutia-Fucugauchi, J., Whalen, M., Wittmann, A., Yamaguchi, K. E., & Zylberman, W. Science, 354(6314):878–882, November, 2016.

Paper doi abstract bibtex

Drilling into Chicxulub's formation The Chicxulub impact crater, known for its link to the demise of the dinosaurs, also provides an opportunity to study rocks from a large impact structure. Large impact craters have “peak rings” that define a complex crater morphology. Morgan et al. looked at rocks from a drilling expedition through the peak rings of the Chicxulub impact crater (see the Perspective by Barton). The drill cores have features consistent with a model that postulates that a single over-heightened central peak collapsed into the multiple-peak-ring structure. The validity of this model has implications for far-ranging subjects, from how giant impacts alter the climate on Earth to the morphology of crater-dominated planetary surfaces. Science, this issue p. 878; see also p. 836 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. Rock samples from IODP/ICDP Expedition 364 support the dynamic collapse model for the formation of the Chicxulub crater. Rock samples from IODP/ICDP Expedition 364 support the dynamic collapse model for the formation of the Chicxulub crater.

@article{morgan_formation_2016,
	title = {The formation of peak rings in large impact craters},
	volume = {354},
	copyright = {Copyright © 2016, American Association for the Advancement of Science},
	issn = {0036-8075, 1095-9203},
	url = {http://science.sciencemag.org/content/354/6314/878},
	doi = {10.1126/science.aah6561},
	abstract = {Drilling into Chicxulub's formation
The Chicxulub impact crater, known for its link to the demise of the dinosaurs, also provides an opportunity to study rocks from a large impact structure. Large impact craters have “peak rings” that define a complex crater morphology. Morgan et al. looked at rocks from a drilling expedition through the peak rings of the Chicxulub impact crater (see the Perspective by Barton). The drill cores have features consistent with a model that postulates that a single over-heightened central peak collapsed into the multiple-peak-ring structure. The validity of this model has implications for far-ranging subjects, from how giant impacts alter the climate on Earth to the morphology of crater-dominated planetary surfaces.
Science, this issue p. 878; see also p. 836
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.
Rock samples from IODP/ICDP Expedition 364 support the dynamic collapse model for the formation of the Chicxulub crater.
Rock samples from IODP/ICDP Expedition 364 support the dynamic collapse model for the formation of the Chicxulub crater.},
	language = {en},
	number = {6314},
	urldate = {2016-11-18},
	journal = {Science},
	author = {Morgan, Joanna V. and Gulick, Sean P. S. and Bralower, Timothy and Chenot, Elise and Christeson, Gail and Claeys, Philippe and Cockell, Charles and Collins, Gareth S. and Coolen, Marco J. L. and Ferrière, Ludovic and Gebhardt, Catalina and Goto, Kazuhisa and Jones, Heather and Kring, David A. and Ber, Erwan Le and Lofi, Johanna and Long, Xiao and Lowery, Christopher and Mellett, Claire and Ocampo-Torres, Rubén and Osinski, Gordon R. and Perez-Cruz, Ligia and Pickersgill, Annemarie and Poelchau, Michael and Rae, Auriol and Rasmussen, Cornelia and Rebolledo-Vieyra, Mario and Riller, Ulrich and Sato, Honami and Schmitt, Douglas R. and Smit, Jan and Tikoo, Sonia and Tomioka, Naotaka and Urrutia-Fucugauchi, Jaime and Whalen, Michael and Wittmann, Axel and Yamaguchi, Kosei E. and Zylberman, William},
	month = nov,
	year = {2016},
	pages = {878--882}
}

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