Fracture Logging of the AND-2A Core, ANDRILL Southern McMurdo Sound Project, Antarctica

• Main Authors: Paulsen, T., Millan, C., Pierdominici, S., Wilson, T., Drew, S., ANDRIL-SMS Science Team
• Other Authors: Paulsen, T.; Department of Geology, University of Wisconsin-Oshkosh, Oshkosh, WI 54901 - USA, Millan, C.; School of Earth Sciences, Ohio State University, 125 S. Oval Mall, Columbus, OH 43210 - USA, Pierdominici, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia, Wilson, T.; School of Earth Sciences, Ohio State University, 125 S. Oval Mall, Columbus, OH 43210 - USA, Drew, S.; School of Earth Sciences, Ohio State University, 125 S. Oval Mall, Columbus, OH 43210 - USA, ANDRIL-SMS Science Team; http://andrill.org/projects/sms/team.html, Department of Geology, University of Wisconsin-Oshkosh, Oshkosh, WI 54901 - USA, School of Earth Sciences, Ohio State University, 125 S. Oval Mall, Columbus, OH 43210 - USA, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia, http://andrill.org/projects/sms/team.html
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2009
• Subjects: Fractures; Downhole logging; Drillcore; Stress; Antarctica; Drilling; 04. Solid Earth::04.02. Exploration geophysics::04.02.05. Downhole; radioactivity; remote sensing; and other methods; 04. Solid Earth::04.04. Geology::04.04.09. Structural geology; 04. Solid Earth::04.07. Tectonophysics::04.07.99. General or miscellaneous; 04. Solid Earth::04.07. Tectonophysics::04.07.05. Stress; 04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics; McMurdo Sound; Antarc*
• Online Access: http://hdl.handle.net/2122/7882

Fractures in AND-2A drillcore were documented in this study. Over 4100 fractures of all types were logged. A population of 510 steeply-dipping, petal, petal-centreline and core-edge induced fractures is present, reaching a maximum density of c. 10 fractures/metre. Subhorizontal induced extension fractures are also abundant. There are 1008 natural fractures in the core, including faults, brecciated zones, veins and sedimentary intrusions. Kinematic indicators document dominant normal faulting, although reverse faults are also present. The natural fractures occur in strata ranging in age from the Miocene to the Plio-Pleistocene. Published 69-76 3.2. Tettonica attiva N/A or not JCR open