Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/582
DC Field | Value | Language |
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dc.contributor.authorall | Pittarello, L.; Dipartimento di Geologia, Paleontologia e Geofisica, Università di Padova, Italy | en |
dc.contributor.authorall | Di Toro, G.; Dipartimento di Geologia, Paleontologia e Geofisica, Università di Padova, Italy | en |
dc.contributor.authorall | Bizzarri, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia | en |
dc.contributor.authorall | Hadizadeh, J.; Department of Geography and Geosciences, University of Louisville, Kentucky USA | en |
dc.contributor.authorall | Pennacchioni, G.; Dipartimento di Geologia, Paleontologia e Geofisica, Università di Padova, Italy | en |
dc.date.accessioned | 2005-12-01T13:58:44Z | en |
dc.date.available | 2005-12-01T13:58:44Z | en |
dc.date.issued | 2005-12-04 | en |
dc.identifier.uri | http://hdl.handle.net/2122/582 | en |
dc.description.abstract | Fracture energy EG (the energy used for expanding a rupture surface area) is the fraction of work during seismic faulting that is required for creation of (i) new surfaces in the slip zone, and (ii) damage zone in the wall rocks. Partitioning of the earthquake energy between EG and frictional heat EH, determines the features of the rupture propagation and the mechanical behavior of the fault. The cataclastic microstructures associated with pseudotachylyte (solidified clast-laden friction-induced melt produced during coseismic slip) veins might contain information about the partitioning. In this preliminary study we used microstructural observations on pseudotachylytes from the Gole Larghe Fault zone (Southern Alps, Italy) to determine both EH and EG. The EH for unit fault surface area is estimated from pseudotachylyte vein thickness 2w. The energy required to produce friction melt is EH = [(1- f) H+ cP(Tm-Thr)]r 2w where f is the volume ratio of lithic clasts within the pseudotachylyte, H is the latent heat of fusion, cP is the specific heat at constant pressure, (Tm-Thr) is the difference between initial melt temperature and host rock temperature and r is the density. The EG is estimated by multiplying the newly created grain surface per unit of fault area by the specific surface energy (J m-2). In fact the studied pseudotachylyte vein contains plagioclase clasts displaying a characteristic internal fragmentation not observed in the host rock. This indicates a direct association between newly created grain surfaces and the seismic rupture process via pseudotachylyte production. It follows that pseudotachylytes might yield information on the energy partitioning between EG and EH. | en |
dc.format.extent | 2367306 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.relation.ispartof | AGU Fall Meeting | en |
dc.subject | Earthquake dynamics | en |
dc.subject | Dynamics and mechanics of faulting | en |
dc.subject | Fractures and faults | en |
dc.subject | Microstructures | en |
dc.subject | Structural goelogy | en |
dc.title | Seismic energy partitioning inferred from pseudotachylyte-bearing faults (Gole Larghe Fault, Adamello batholith, Italy) | en |
dc.type | Poster session | en |
dc.description.status | Unpublished | en |
dc.subject.INGV | 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology | en |
dc.description.ConferenceLocation | San Francisco, CA, USA | en |
dc.relation.references | 1. Di Toro, G., Pennacchioni, G., 2004. Superheated friction-induced melts in zoned pseudotachylytes within the Adamello tonalites (Italian Southern Alps) J. Struct. Geol. 26, 1783–1801; 2. Di Toro, G., et al., 2005. Can pseudotachylytes be used to infer earthquake source parameters? An example of limitations in the study of exhumed faults, Tectonophysics, 402, 3-20; 3. Chester, J., et al., 2005. Fracture surface energy of the Punchbowl fault, San Andreas system , Nature, 437, 133-136; 4. Wilson, B., et al., 2005. Particle size and energetics of gouge from earthquake rupture zones, Nature, 434, 749-752 5. Brace, W.F., Walsh, J.B., 1962. Some direct measurements of the surface energy of quartz and orthoclase, Am. Min. 47, 1111-1122. 6. McGarr, A., 1999. On relating apparent stress to the stress causing earthquake slip, Journal of Geophysical Research 104, 3003–3011. | en |
dc.description.fulltext | open | en |
dc.contributor.author | Pittarello, L. | en |
dc.contributor.author | Di Toro, G. | en |
dc.contributor.author | Bizzarri, A. | en |
dc.contributor.author | Hadizadeh, J. | en |
dc.contributor.author | Pennacchioni, G. | en |
dc.contributor.department | Dipartimento di Geologia, Paleontologia e Geofisica, Università di Padova, Italy | en |
dc.contributor.department | Dipartimento di Geologia, Paleontologia e Geofisica, Università di Padova, Italy | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia | en |
dc.contributor.department | Dipartimento di Geologia, Paleontologia e Geofisica, Università di Padova, Italy | en |
item.openairetype | Poster session | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Università degli Studi di Padova | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia | - |
crisitem.author.dept | Dipartimento di Geoscienze, Università di Padova, Padova, IT | - |
crisitem.author.orcid | 0000-0002-6618-3474 | - |
crisitem.author.orcid | 0000-0001-8313-4124 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Conference materials |
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poster_AGU_SF.pdf | 2.31 MB | Adobe PDF | View/Open |
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