Halfpenny, Angela and Prior, David (2009): Data report; An electron backscatter diffraction study of a gabbroic shear zone, IODP Expedition 304/305

Leg/Site/Hole:
IODP 304
IODP 304 U1309
IODP 305 U1309
Identifier:
2009-022887
georefid
10. 2204/iodp.proc.304305.201.2009
doi
Creator:
Halfpenny, Angela
Australian National University, Research School of Earth Sciences, Canberra, A.C.T., Australia
author
Prior, David
Universite de Montpellier II, France
author
Identification:
Data report; An electron backscatter diffraction study of a gabbroic shear zone, IODP Expedition 304/305
2009
In: Blackman, Donna, Ildefonse, Benoit, John, Barbara E., Ohara, Yasuhiko, Miller, D. Jay, MacLeod, Christopher J., Einaudi, Florence, Abratis, Michael W., Andal, Eric S., Andreani, Muriel, Awaji, Shunsaku, Charney, Allison, Christie, David, Drouin, Marion, Frost, Bryce R., Gee, Jeffrey S., Godard, Marguerite, Grimes, Craig B., Hayman, Nicholas W., Hirose, Takehiro, Hirth, James Gregory, Maeda, Jinichiro, McCaig, Andrew M., Morris, Antony, Nakagawa, Tatsunori, Searle, Roger C., von der Handt, Anette, Delius, Heike, Abe, Natsue, Beard, James S., Brunelli, Daniele, Delacour, Adelie G., Escartin, Javier, Fryer, Patricia B., Halfpenny, Angela, Hansen, Heidi-Elisabeth, Harris, Amber C., Hasebe, Akihiro Tamura, Hellebrand, Eric, Ishimaru, Satoko, Johnson, Kevin T. M., Karner, Garry D., Linek, Margaret, Mason, Olivia U., Michibayashi, Katsuyoshi, Nozaka, Toshio, Rosner, Martin, Suhr, Guenter, Tominaga, Masako, Yamasaki, Toru, Zhao, Xixi, Proceedings of the Integrated Ocean Drilling Program; oceanic core complex formation, Atlantis Massif; Expeditions 304 and 305 of the riserless drilling platform from and to Ponta Delgada, Azores (Portugal), Sites U1309-U1311, 17 November 2004-7 January 2005 and from and to Ponta Delgada, Azores (Portugal), Site U1309, 7 January-2 March 2005
IODP Management International, Washington, DC, United States
304-305
Integrated Ocean Drilling Program Expedition 304/305 was designed to investigate the formation and evolution of oceanic core complexes by drilling through the Atlantis Massif oceanic core complex. Characterization of shear zone microstructures from the Atlantis Massif provides information about the area's deformation history and insight into the formation of oceanic core complexes. Plastic deformation was recognized in only 3% of the recovered core volume. The majority of the shear zones are located in gabbroic lithologies. Using orientation contrast imaging and electron backscatter diffraction, petrofabrics and microstructures were compared between the center and the edge of a gabbroic shear zone collected from IODP Hole U1309D. Analysis of the crystallographic preferred orientation, internal deformation, and grain size variations of feldspar was also performed.
English
Serial
Coverage:Geographic coordinates:
North:30.1100
West:-42.0700East: -42.0600
South:30.1000
Igneous and metamorphic petrology; Structural geology; Atlantic Ocean; Atlantis Massif; boreholes; cores; crust; deformation; electron diffraction data; Expedition 304; faults; feldspar group; foliation; framework silicates; gabbroic composition; grain boundaries; igneous rocks; Integrated Ocean Drilling Program; IODP Site 1309; metamorphic core complexes; Mid-Atlantic Ridge; North Atlantic; oceanic crust; petrofabrics; plagioclase; plutonic rocks; shear zones; silicates; statistical analysis; structural analysis; ultrastructure;
.