Mapping and evaluating kinematics and the stress and strain field at active faults and fissures: a comparison between field and drone data at the NE rift, Mt Etna (Italy)
<p>We collected drone data to quantify the kinematics at extensional fractures and normal faults, integrated this information with seismological data to reconstruct the stress field, and critically compared the results with previous fieldwork to assess the best practice. As a key site, we anal...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-04-01
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| Series: | Solid Earth |
| Online Access: | https://se.copernicus.org/articles/12/801/2021/se-12-801-2021.pdf |
| _version_ | 1818673402825670656 |
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| author | A. Tibaldi A. Tibaldi N. Corti E. De Beni F. L. Bonali F. L. Bonali S. Falsaperla H. Langer M. Neri M. Cantarero D. Reitano L. Fallati |
| author_facet | A. Tibaldi A. Tibaldi N. Corti E. De Beni F. L. Bonali F. L. Bonali S. Falsaperla H. Langer M. Neri M. Cantarero D. Reitano L. Fallati |
| author_sort | A. Tibaldi |
| collection | DOAJ |
| description | <p>We collected drone data to quantify the kinematics at extensional fractures
and normal faults, integrated this information with seismological data to
reconstruct the stress field, and critically compared the results with
previous fieldwork to assess the best practice. As a key site, we analyzed a
sector of the northeast rift of Mt Etna, an area affected by continuous
ground deformation linked to gravity sliding of the volcano's eastern flank
and dike injections. The studied sector is characterized also by the
existence of eruptive craters and fissures and lava flows. This work shows
that this rift segment is affected by a series of NNE- to NE-striking,
parallel extensional fractures characterized by an opening mode along an
average N105.7<span class="inline-formula"><sup>∘</sup></span> vector. The stress field is characterized by a
<span class="inline-formula"><i>σ</i><sub>Hmin</sub></span> trending northwest–southeast. Normal faults strike parallel to the
extensional fractures. The extensional strain obtained by cumulating the net
offset at extensional fractures with the fault heave gives a stretching
ratio of 1.003 in the northeastern part of the study area and 1.005 in the
southwestern part. Given a maximum age of 1614 CE for the offset lavas,
we obtained an extension rate of 1.9 cm yr<span class="inline-formula"><sup>−1</sup></span> for the last 406 years. This value
is consistent with the slip along the Pernicana Fault system, confirming
that the NE rift structures accommodate the sliding of the eastern flank of the volcano.</p> |
| first_indexed | 2024-12-17T07:55:14Z |
| format | Article |
| id | doaj.art-112ee45d583a4e5b8084e4764ecae8f6 |
| institution | Directory Open Access Journal |
| issn | 1869-9510 1869-9529 |
| language | English |
| last_indexed | 2024-12-17T07:55:14Z |
| publishDate | 2021-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Solid Earth |
| spelling | doaj.art-112ee45d583a4e5b8084e4764ecae8f62022-12-21T21:57:44ZengCopernicus PublicationsSolid Earth1869-95101869-95292021-04-011280181610.5194/se-12-801-2021Mapping and evaluating kinematics and the stress and strain field at active faults and fissures: a comparison between field and drone data at the NE rift, Mt Etna (Italy)A. Tibaldi0A. Tibaldi1N. Corti2E. De Beni3F. L. Bonali4F. L. Bonali5S. Falsaperla6H. Langer7M. Neri8M. Cantarero9D. Reitano10L. Fallati11Department of Earth and Environmental Sciences, University of Milan-Bicocca, Milan, ItalyCRUST – Interuniversity Center for 3D Seismotectonics with Territorial Applications, Chieti, ItalyDepartment of Earth and Environmental Sciences, University of Milan-Bicocca, Milan, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Sezione di Catania, Catania, ItalyDepartment of Earth and Environmental Sciences, University of Milan-Bicocca, Milan, ItalyCRUST – Interuniversity Center for 3D Seismotectonics with Territorial Applications, Chieti, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Sezione di Catania, Catania, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Sezione di Catania, Catania, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Sezione di Catania, Catania, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Sezione di Catania, Catania, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Sezione di Catania, Catania, ItalyDepartment of Earth and Environmental Sciences, University of Milan-Bicocca, Milan, Italy<p>We collected drone data to quantify the kinematics at extensional fractures and normal faults, integrated this information with seismological data to reconstruct the stress field, and critically compared the results with previous fieldwork to assess the best practice. As a key site, we analyzed a sector of the northeast rift of Mt Etna, an area affected by continuous ground deformation linked to gravity sliding of the volcano's eastern flank and dike injections. The studied sector is characterized also by the existence of eruptive craters and fissures and lava flows. This work shows that this rift segment is affected by a series of NNE- to NE-striking, parallel extensional fractures characterized by an opening mode along an average N105.7<span class="inline-formula"><sup>∘</sup></span> vector. The stress field is characterized by a <span class="inline-formula"><i>σ</i><sub>Hmin</sub></span> trending northwest–southeast. Normal faults strike parallel to the extensional fractures. The extensional strain obtained by cumulating the net offset at extensional fractures with the fault heave gives a stretching ratio of 1.003 in the northeastern part of the study area and 1.005 in the southwestern part. Given a maximum age of 1614 CE for the offset lavas, we obtained an extension rate of 1.9 cm yr<span class="inline-formula"><sup>−1</sup></span> for the last 406 years. This value is consistent with the slip along the Pernicana Fault system, confirming that the NE rift structures accommodate the sliding of the eastern flank of the volcano.</p>https://se.copernicus.org/articles/12/801/2021/se-12-801-2021.pdf |
| spellingShingle | A. Tibaldi A. Tibaldi N. Corti E. De Beni F. L. Bonali F. L. Bonali S. Falsaperla H. Langer M. Neri M. Cantarero D. Reitano L. Fallati Mapping and evaluating kinematics and the stress and strain field at active faults and fissures: a comparison between field and drone data at the NE rift, Mt Etna (Italy) Solid Earth |
| title | Mapping and evaluating kinematics and the stress and strain field at active faults and fissures: a comparison between field and drone data at the NE rift, Mt Etna (Italy) |
| title_full | Mapping and evaluating kinematics and the stress and strain field at active faults and fissures: a comparison between field and drone data at the NE rift, Mt Etna (Italy) |
| title_fullStr | Mapping and evaluating kinematics and the stress and strain field at active faults and fissures: a comparison between field and drone data at the NE rift, Mt Etna (Italy) |
| title_full_unstemmed | Mapping and evaluating kinematics and the stress and strain field at active faults and fissures: a comparison between field and drone data at the NE rift, Mt Etna (Italy) |
| title_short | Mapping and evaluating kinematics and the stress and strain field at active faults and fissures: a comparison between field and drone data at the NE rift, Mt Etna (Italy) |
| title_sort | mapping and evaluating kinematics and the stress and strain field at active faults and fissures a comparison between field and drone data at the ne rift mt etna italy |
| url | https://se.copernicus.org/articles/12/801/2021/se-12-801-2021.pdf |
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