globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.05.013
Scopus记录号: 2-s2.0-85047062192
论文题名:
Extraordinary rocks from the peak ring of the Chicxulub impact crater: P-wave velocity, density, and porosity measurements from IODP/ICDP Expedition 364
作者: Christeson G.L.; Gulick S.P.S.; Morgan J.V.; Gebhardt C.; Kring D.A.; Le Ber E.; Lofi J.; Nixon C.; Poelchau M.; Rae A.S.P.; Rebolledo-Vieyra M.; Riller U.; Schmitt D.R.; Wittmann A.; Bralower T.J.; Chenot E.; Claeys P.; Cockell C.S.; Coolen M.J.L.; Ferrière L.; Green S.; Goto K.; Jones H.; Lowery C.M.; Mellett C.; Ocampo-Torres R.; Perez-Cruz L.; Pickersgill A.E.; Rasmussen C.; Sato H.; Smit J.; Tikoo S.M.; Tomioka N.; Urrutia-Fucugauchi J.; Whalen M.T.; Xiao L.; Yamaguchi K.E.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 495
起始页码: 1
结束页码: 11
语种: 英语
英文关键词: Chicxulub ; impact crater ; peak ring ; physical properties
Scopus关键词: Acoustic wave velocity ; Chemical reactions ; Clay alteration ; Physical properties ; Rock products ; Sedimentary rocks ; Sedimentology ; Seismic waves ; Structural geology ; Wave propagation ; Chicxulub ; Chicxulub impact ; Continental scientific drillings ; Hydrothermal alterations ; Impact craters ; Model prediction ; P-wave velocity ; Porosity measurement ; Porosity ; crater ; density ; P-wave ; physical property ; porosity ; sedimentary rock ; suevite ; uplift ; wave velocity ; Bay of Campeche ; Chicxulub Crater ; Mexico [North America] ; Yucatan
英文摘要: Joint International Ocean Discovery Program and International Continental Scientific Drilling Program Expedition 364 drilled into the peak ring of the Chicxulub impact crater. We present P-wave velocity, density, and porosity measurements from Hole M0077A that reveal unusual physical properties of the peak-ring rocks. Across the boundary between post-impact sedimentary rock and suevite (impact melt-bearing breccia) we measure a sharp decrease in velocity and density, and an increase in porosity. Velocity, density, and porosity values for the suevite are 2900–3700 m/s, 2.06–2.37 g/cm3, and 20–35%, respectively. The thin (25 m) impact melt rock unit below the suevite has velocity measurements of 3650–4350 m/s, density measurements of 2.26–2.37 g/cm3, and porosity measurements of 19–22%. We associate the low velocity, low density, and high porosity of suevite and impact melt rock with rapid emplacement, hydrothermal alteration products, and observations of pore space, vugs, and vesicles. The uplifted granitic peak ring materials have values of 4000–4200 m/s, 2.39–2.44 g/cm3, and 8–13% for velocity, density, and porosity, respectively; these values differ significantly from typical unaltered granite which has higher velocity and density, and lower porosity. The majority of Hole M0077A peak-ring velocity, density, and porosity measurements indicate considerable rock damage, and are consistent with numerical model predictions for peak-ring formation where the lithologies present within the peak ring represent some of the most shocked and damaged rocks in an impact basin. We integrate our results with previous seismic datasets to map the suevite near the borehole. We map suevite below the Paleogene sedimentary rock in the annular trough, on the peak ring, and in the central basin, implying that, post impact, suevite covered the entire floor of the impact basin. Suevite thickness is 100–165 m on the top of the peak ring but 200 m in the central basin, suggesting that suevite flowed downslope from the collapsing central uplift during and after peak-ring formation, accumulating preferentially within the central basin. © 2018 Elsevier B.V.
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被引频次[WOS]:52   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109820
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: University of Texas Institute for Geophysics, Jackson School of Geosciences, Austin, United States; Department of Geological Sciences, Jackson School of Geosciences, Austin, United States; Department of Earth Science and Engineering, Imperial College, London, United Kingdom; Alfred Wegener Institute Helmholtz Centre of Polar and Marine Research, Bremerhaven, Germany; Lunar and Planetary Institute, Houston, United States; Department of Geology, University of Leicester, United Kingdom; Géosciences Montpellier, Université de Montpellier, France; Department of Physics, University of Alberta, Canada; Department of Geology, University of Freiburg, Germany; SM 312, Mza 7, Chipre 5, Resid. Isla Azul, Cancun, Quintana Roo, Mexico; Institut für Geologie, Universität Hamburg, Germany; Eyring Materials Center, Arizona State University, Tempe, United States; Department of Geosciences, Pennsylvania State University, University Park, United States; Biogéosciences Laboratory, Université de Bourgogne-Franche Comté, France; Analytical, Environmental and Geo-Chemistry, Vrije Universiteit Brussel, Brussels, Belgium; School of Physics and Astronomy, University of Edinburgh, United Kingdom; Department of Chemistry, WA-Organic and Isotope Geochemistry Centre (WA-OIGC), Curtin University, Bentley, Australia; Natural History Museum, Vienna, Austria; British Geological Survey, Edinburgh, United Kingdom; International Research Institute of Disaster Science, Tohoku University, Sendai, Japan; United Kingdom Hydrographic Office, Taunton, United Kingdom; Groupe de Physico-Chimie de l'Atmosphère, L'Institut de Chimie et Procédés pour l'Énergie, l'Environnement et la Santé (ICPEES), Université de Strasbourg, France; Instituto de Geofísica, Universidad Nacional Autónoma De México, Ciudad de México, Mexico; School of Geographical and Earth Sciences, University of Glasgow, United Kingdom; Argon Isotope Facility, Scottish Universities Environmental Research Centre (SUERC), East Kilbride, United Kingdom; Department of Geology and Geophysics, University of Utah, Salt Lake City, United States; Japan Agency for Marine–Earth Science and Technology, Kanagawa, Japan; Faculty of Earth and Life Sciences (FALW), Vrije Universiteit, Amsterdam, Netherlands; Earth and Planetary Sceinces, Rutgers University, New Brunswick, United States; Kochi Institute for Core Sample Research, Japan Agency for Marine–Earth Science and Technology, Kochi, Japan; Department of Geosciences, University of Alaska, Fairbanks, United States; School of Earth Sciences, Planetary Science Institute, China University of Geosciences (Wuhan), China; Department of Chemistry, Toho University, Chiba, Japan; NASA Astrobiology Institute, United States; Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, United States; University of Texas Institute for Geophysics, Jackson School of Geosciences, Austin, United States; Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, Chiba, Japan

Recommended Citation:
Christeson G.L.,Gulick S.P.S.,Morgan J.V.,et al. Extraordinary rocks from the peak ring of the Chicxulub impact crater: P-wave velocity, density, and porosity measurements from IODP/ICDP Expedition 364[J]. Earth and Planetary Science Letters,2018-01-01,495
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