Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/11816
DC Field | Value | Language |
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dc.date.accessioned | 2018-05-02T08:23:13Z | en |
dc.date.available | 2018-05-02T08:23:13Z | en |
dc.date.issued | 2017-12 | en |
dc.identifier.uri | http://hdl.handle.net/2122/11816 | en |
dc.description.abstract | Large normal faults are frequently reactivated as high-angle reverse faults during basin inversion. Elevated fluid pressure is commonly invoked to explain high-angle reverse slip. Analogue and numerical modeling have demonstrated that frictional weakening may also promote high-angle reverse slip, but there are currently no frictional strength measurements available for fault rocks collected from large high-angle reverse faults. To test the hypothesis that frictional weakening could facilitate high-angle reverse slip, we performed single- and double-direct friction experiments on fault rocks collected from the Moonlight Fault Zone in New Zealand, a basin-bounding normal fault zone that was reactivated as a high-angle reverse fault (present-day dip angle 60°–75°). The fault core is exposed in quartzofeldspathic schists exhumed from c. 4–8 km depth and contains a <20 m thick sequence of breccias, cataclasites and foliated cataclasites that are enriched in chlorite and muscovite. Friction experiments on water-saturated, intact samples of foliated cataclasite at room temperature and normal stresses up to 75 MPa yielded friction coefficients of 0.19<μ < 0.25. On the assumption of horizontal maximum compressive stress, reactivation analysis indicates that a friction coefficient of <0.25 will permit slip on high-angle reverse faults at hydrostatic (or even sub-hydrostatic) fluid pressures. Since foliated and phyllosilicate-rich fault rocks are common in large reactivated fault zones at basement depths, long-term frictional weakening is likely to act in concert with episodic build-ups of fluid pressure to promote high-angle reverse slip during basin inversion. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Journal of Structural Geology | en |
dc.relation.ispartofseries | /105 (2017) | en |
dc.title | Reactivation of normal faults as high-angle reverse faults due to low frictional strength: Experimental data from the Moonlight Fault Zone, New Zealand | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 34-43 | en |
dc.identifier.doi | 10.1016/j.jsg.2017.10.009 | en |
dc.description.obiettivoSpecifico | 1T. Deformazione crostale attiva | en |
dc.description.obiettivoSpecifico | 2T. Sorgente Sismica | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | Smith, S. A. F. | en |
dc.contributor.author | Tesei, Telemaco | en |
dc.contributor.author | Scott, J.M. | en |
dc.contributor.author | Collettini, Cristiano | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Università La Sapienza | - |
crisitem.author.orcid | 0000-0002-0178-7672 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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1-s2.0-S0191814117302377-main.pdf | 2.59 MB | Adobe PDF |
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