Deformation bands and alteration in porous glass-rich volcaniclastics: Insights from Milos, Greece
| dc.rights.license | open | en_US |
| hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
| dc.contributor.author | LEROY, Etienne | |
| hal.structure.identifier | Environnements et Paléoenvironnements OCéaniques [EPOC] | |
| dc.contributor.author | CAVAILHES, Thibault | |
| hal.structure.identifier | Institut de Mécanique et d'Ingénierie [I2M] | |
| dc.contributor.author | ANGUY, Yannick
IDREF: 129650307 | |
| hal.structure.identifier | Géosciences Montpellier | |
| dc.contributor.author | SOLIVA, R. | |
| hal.structure.identifier | Department of Earth Science [Bergen] [UiB] | |
| dc.contributor.author | ROTEVATN, A. | |
| hal.structure.identifier | Institut de Mécanique et d'Ingénierie [I2M] | |
| dc.contributor.author | GABORIEAU, Cecile
IDREF: 161801544 | |
| dc.date.accessioned | 2024-01-24T15:02:44Z | |
| dc.date.available | 2024-01-24T15:02:44Z | |
| dc.date.issued | 2023 | |
| dc.identifier.issn | 0191-8141 | en_US |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/187494 | |
| dc.description.abstractEn | Deformation bands in porous volcaniclastics are little studied structural heterogeneities despite their relevance for constraining the modalities of deformation development and related fluid-rock interactions in volcanic areas.We document a dense network of normal-sense Deformation Bands (Normal-sense Compactional Shear Bands (NCSBs) affecting upper Pliocene felsic glassy tuffites in Milos, Greece. NCSBs probably formed between 300 and 500 m of burial depth, in response to NE-SW directed extension which is related to volcanic rift development in the area. They accommodate mm-to m-shear-offsets, trend either N105 ± 10° or N070 ± 10°, and show mutual cross-cutting relations. The NCSB fault rock is made of ultracataclasite in which the cataclastic mechanisms have affected both the mineral fraction and the volcanic glass. Minerals are fractured along their cleavages whereas pumices are interestingly fractured along their vesicles.The development of chemical alteration (dissolution and cementation) essentially into the ultracataclasite is expressed through glass-hosted corrosion gulfs and smectites filling the intergranular porosity. These observations support that NCSBs preferentially retained water, have been the seat of greater fluid flow, and are the locus of ongoing phyllosilicate self-sealing in the vadose zone. A significant decrease (up to one order of magnitude) in porosity is measured within the studied NCSBs | |
| dc.language.iso | EN | en_US |
| dc.subject.en | Fault | |
| dc.subject.en | cataclasis | |
| dc.subject.en | Corrosion gulfs | |
| dc.subject.en | Smectites | |
| dc.subject.en | Sealing | |
| dc.title.en | Deformation bands and alteration in porous glass-rich volcaniclastics: Insights from Milos, Greece | |
| dc.type | Article de revue | en_US |
| dc.identifier.doi | 10.1016/j.jsg.2023.104982 | en_US |
| dc.subject.hal | Planète et Univers [physics]/Sciences de la Terre/Géophysique [physics.geo-ph] | en_US |
| dc.subject.hal | Planète et Univers [physics]/Sciences de la Terre/Volcanologie | en_US |
| bordeaux.journal | Journal of Structural Geology | en_US |
| bordeaux.page | 104982 | en_US |
| bordeaux.volume | 177 | en_US |
| bordeaux.hal.laboratories | EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805 | en_US |
| bordeaux.institution | Université de Bordeaux | en_US |
| bordeaux.institution | CNRS | en_US |
| bordeaux.peerReviewed | oui | en_US |
| bordeaux.inpress | non | en_US |
| bordeaux.import.source | hal | |
| hal.identifier | hal-04286794 | |
| hal.version | 1 | |
| hal.popular | non | en_US |
| hal.audience | Internationale | en_US |
| hal.export | false | |
| workflow.import.source | hal | |
| dc.rights.cc | Pas de Licence CC | en_US |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Structural%20Geology&rft.date=2023&rft.volume=177&rft.spage=104982&rft.epage=104982&rft.eissn=0191-8141&rft.issn=0191-8141&rft.au=LEROY,%20Etienne&CAVAILHES,%20Thibault&ANGUY,%20Yannick&SOLIVA,%20R.&ROTEVATN,%20A.&rft.genre=article |
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