Reoriented structures in the East Pacific Rise basaltic crust from ODP Hole 1256D, Leg 206; integration of core measurements and electrical-acoustic images

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doi: 10.2973/odp.proc.sr.206.004.2006
Author(s): Tartarotti, Paola; Crispini, Laura; Einaudi, Florence; Campari, E.
Ocean Drilling Program, Leg 206, Shipboard Scientific Party, College Station, TX
Author Affiliation(s): Primary:
Universita di Milano, Dipartimento di Scienze della Terra, Milan, Italy
Other:
University of California Santa Barbara, United States
Ocean Drilling Program, United States
University of Michigan, United States
University of Alberta, Canada
University of Leicester, United Kingdom
California Institute of Technology, United States
Universita di Genova, Italy
Université de Montpellier II, France
Florida State University, United States
Bundesanstalt für Geowissenschaften und Rohstoffe, Federal Republic of Germany
University of Utah, United States
Université d'Aix-Marseille, France
GEOMAR, Federal Republic of Germany
Macquarie University, Australia
Universita di Milano, Italy
Shizuoka University, Japan
Boston University, United States
Volume Title: Proceedings of the Ocean Drilling Program; scientific results; an in situ section of upper oceanic crust formed by superfast seafloor spreading; covering Leg 206 of the cruises of the drilling vessel JOIDES Resolution; Balboa, Panama, to Balboa, Panama; Site 1256; 6 November 2002-4 January 2003
Volume Author(s): Teagle, Damon A. H.; Wilson, Douglas S.; Acton, Gary D.; Alt, Jeffrey C.; Banerjee, Neil R.; Barr, Samantha R.; Coggon, Rosalind M.; Cooper, Kari M.; Crispini, Laura; Einaudi, Florence; Jiang, Shijun; Kalberkamp, Ulrich; Kerneklian, Marcie; Laverne, Christine; Nichols, Holly J.; Sandwell, Rachel; Tartarotti, Paola; Umino, Susumu; Ziegler, Christa
Source: Proceedings of the Ocean Drilling Program; scientific results; an in situ section of upper oceanic crust formed by superfast seafloor spreading; covering Leg 206 of the cruises of the drilling vessel JOIDES Resolution; Balboa, Panama, to Balboa, Panama; Site 1256; 6 November 2002-4 January 2003, Damon A. H. Teagle, Douglas S. Wilson, Gary D. Acton, Jeffrey C. Alt, Neil R. Banerjee, Samantha R. Barr, Rosalind M. Coggon, Kari M. Cooper, Laura Crispini, Florence Einaudi, Shijun Jiang, Ulrich Kalberkamp, Marcie Kerneklian, Christine Laverne, Holly J. Nichols, Rachel Sandwell, Paola Tartarotti, Susumu Umino and Christa Ziegler; Ocean Drilling Program, Leg 206, Shipboard Scientific Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.206, 26p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. Data report. 15 refs.CD-ROM format, ISSN 1096-2514; WWW format ISSN 1096-7451; illus., incl. 1 table, sketch map
Summary: Brittle structures (open fractures and veins) from basaltic oceanic crust drilled at Ocean Drilling Program (ODP) Site 1256 (Guatemala Basin, Pacific Ocean) during Leg 206 were reoriented to the geographic coordinates by (1) correlating structures observed on the core with unoriented images of the exterior of the core and (2) correlating core structures and unoriented images with oriented borehole images. The images of the exterior of the core were obtained by scanning whole-core pieces with the Deutsche Montan Technologie Digital Color Core-Scan system. In the unrolled core images, nonhorizontal planar structures (e.g., veins, faults, or fractures) produce sinusoidal-shaped curves. These can be matched to similar-shaped features imaged along the borehole wall. The borehole images were obtained by the Formation MicroScanner (FMS)-sonic (Dipole Sonic Imager) tool string and the Ultrasonic Borehole Imager (UBI). The FMS provides high-resolution electrical resistivity-based images of borehole walls. FMS images are oriented to magnetic north using the General Purpose Inclinometer Tool. This allows the dip and azimuth of geological features intersecting the hole to be measured from the processed FMS image. The UBI features a high-resolution transducer that provides acoustic images of the borehole wall. The UBI was used in hard rocks for the first time in the history of the ODP during Leg 206.
Year of Publication: 2006
Research Program: ODP Ocean Drilling Program
Key Words: 16 Structural Geology; 20 Geophysics, Applied; Acoustical logging; Acoustical methods; Basalts; Brittle deformation; Cenozoic; Cores; Crust; Deformation; East Pacific; East Pacific Rise; Electrical logging; Electrical methods; Formation MicroScanner; Fractures; Geophysical methods; Guatemala Basin; Igneous rocks; Imagery; Leg 206; Lithostratigraphy; Measurement; Miocene; Neogene; North Pacific; Northeast Pacific; ODP Site 1256; Ocean Drilling Program; Oceanic crust; Orientation; Pacific Ocean; Quaternary; Tertiary; Veins; Volcanic rocks; Well-logging
Coordinates: N064400 N064400 W0915600 W0915600
Record ID: 2007054598
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