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

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 fra...

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Bibliographic Details
Main Authors: Paulsen, T., Millan, C., Pierdominici, S., Wilson, T. J., Drew, S., ANDRILL-SMS Science Team
Format: Text
Language:unknown
Published: DigitalCommons@University of Nebraska - Lincoln 2008
Subjects:
Environmental Indicators and Impact Assessment
McMurdo Sound
Antarc*
Antarctica
Online Access:https://digitalcommons.unl.edu/andrillrespub/34
https://digitalcommons.unl.edu/context/andrillrespub/article/1033/viewcontent/Paulsen_TA_2008_Fracture_logging.pdf
Description
Summary: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.

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