Articles | Volume 24
Science report
22 Oct 2018
Science report |  | 22 Oct 2018

Drilling-induced and logging-related features illustrated from IODP–ICDP Expedition 364 downhole logs and borehole imaging tools

Johanna Lofi, David Smith, Chris Delahunty, Erwan Le Ber, Laurent Brun, Gilles Henry, Jehanne Paris, Sonia Tikoo, William Zylberman, Philippe A. Pezard, Bernard Célérier, Douglas R. Schmitt, Chris Nixon, and Expedition 364 Science Party

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Life and death in the Chicxulub impact crater: a record of the Paleocene–Eocene Thermal Maximum
Vann Smith, Sophie Warny, Kliti Grice, Bettina Schaefer, Michael T. Whalen, Johan Vellekoop, Elise Chenot, Sean P. S. Gulick, Ignacio Arenillas, Jose A. Arz, Thorsten Bauersachs, Timothy Bralower, François Demory, Jérôme Gattacceca, Heather Jones, Johanna Lofi, Christopher M. Lowery, Joanna Morgan, Noelia B. Nuñez Otaño, Jennifer M. K. O'Keefe, Katherine O'Malley, Francisco J. Rodríguez-Tovar, Lorenz Schwark, and the IODP–ICDP Expedition 364 Scientists
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Location/Setting: Instrumentation and observatories | Subject: Geophysics/Seismology | Geoprocesses: Earth science methods
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Cited articles

Anderson, R. N. and Zoback, M. D.: The implications of fracture and void distribution from bore-hole televiewer imagery for the seismic velocity of the upper oceanic crust at Deep Sea Drilling Project Holes 501 and 504B (Costa Rica Rift), Init. Rep. DSDP, 69, 255–270, 1983. 
Cheung, P. S.: Microresistivity and ultrasonic imagers: tool operations and processing principles with reference to commonly encountered image artefacts, in: Borehole Imaging: applications and case histories, edited by: Lovell, M. A., Williamson, G., and Harvey, P. K., Geol. Soc. Lond., Special Publications, 159, 1, 45–57, 1999. 
Fuller, M., Hastedt, M., and Herr, B.: Coring-induced magnetization of recovered sediment, Proc. ODP, Sci. Res., 145, 455–468, 1998. 
Ekstrom, M. E., Dahan, C., Chen, M.-Y., Lloyd, P., and Rossi, D. J.: Formation imaging with microelectrical scanning arrays, The Log Analyst, 28, 294–306, 1987. 
Short summary
In 2016 an international scientific expedition drilled a 1.3 km deep hole to explore the Chicxulub impact crater, buried below the surface of the Yucatán shelf (Mexico). This crater is linked to the End-Cretaceous mass extinction. Downhole logs have been acquired in the hole, providing several key parameters characterizing the geology of the crater. However, few of the data recorded may be artifacts and should not be misinterpreted as real geological features. They are discussed in this study.