dc.contributor.author
Famin, Vincent
dc.contributor.author
Raimbourg, Hugues
dc.contributor.author
Garcia, Sebastian
dc.contributor.author
Bellahsen, Nicolas
dc.contributor.author
Hamada, Yohei
dc.contributor.author
Boullier, Anne-Marie
dc.contributor.author
Fabbri, Olivier
dc.contributor.author
Michon, Laurent
dc.contributor.author
Uchide, Takahiko
dc.contributor.author
Ricci, Tullio
dc.contributor.author
Hirono, Tetsuro
dc.contributor.author
Kawabata, Kuniyo
dc.date.accessioned
2018-06-08T03:29:14Z
dc.date.available
2015-04-10T08:08:39.909Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/15285
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-19473
dc.description.abstract
We used a field analysis of rock deformation microstructures and
mesostructures to reconstruct the long-term orientation of stresses around two
major active fault systems in Japan, the Median Tectonic Line and the Rokko-
Awaji Segment. Our study reveals that the dextral slip of the two fault
systems, active since the Plio-Quaternary, was preceded by fault normal
extension in the Miocene and sinistral wrenching in the Paleogene. The two
fault systems deviated the regional stress field at the kilometer scale in
their vicinity during each of the three tectonic regimes. The largest
deviation, found in the Plio-Quaternary, is a more fault normal rotation of
the maximum horizontal stress to an angle of 79° with the fault strands,
suggesting an extremely low shear stress on the Median Tectonic Line and the
Rokko-Awaji Segment. Possible causes of this long-term stress perturbation
include a nearly total release of shear stress during earthquakes, a low
static friction coefficient, or low elastic properties of the fault zones
compared with the country rock. Independently of the preferred interpretation,
the nearly fault normal orientation of the direction of maximum compression
suggests that the mechanical properties of the fault zones are inadequate for
the buildup of a pore fluid pressure sufficiently elevated to activate slip.
The long-term weakness of the Median Tectonic Line and the Rokko-Awaji Segment
may reside in low-friction/low-elasticity materials or dynamic weakening
rather than in preearthquake fluid overpressures.
en
dc.rights.uri
http://publications.agu.org/author-resource-center/usage-permissions/
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie
dc.title
Stress rotations and the long-term weakness of the Median Tectonic Line and
the Rokko-Awaji Segment
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation
Tectonics. - 33 (2014),10, S. 1900-1919
dcterms.bibliographicCitation.doi
10.1002/2014TC003600
dcterms.bibliographicCitation.url
http://onlinelibrary.wiley.com/doi/10.1002/2014TC003600/abstract;jsessionid=A73C0E23037C698FF5B55C21B6DE3AFF.f03t01
refubium.affiliation
Geowissenschaften
de
refubium.mycore.fudocsId
FUDOCS_document_000000021570
refubium.resourceType.isindependentpub
no
refubium.mycore.derivateId
FUDOCS_derivate_000000004358
dcterms.accessRights.openaire
open access