Geology of the southern Gran Paradiso Massif and Lower Piedmont Zone contact area (middle Ala Valley, Western Alps, Italy)
This work presents the structural evolution of a poorly studied key-area in the middle Ala Valley, Western Alps, where two tectono-metamorphic units are exposed. A geological map at the 1:10.000 scale, integrated with meso- and microstructural analysis, has been realised. We investigated the contact...
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| Veröffentlicht in: | Journal of maps 2021-12, Vol.17 (2), p.237-246 |
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| description | This work presents the structural evolution of a poorly studied key-area in the middle Ala Valley, Western Alps, where two tectono-metamorphic units are exposed. A geological map at the 1:10.000 scale, integrated with meso- and microstructural analysis, has been realised. We investigated the contact area between Gran Paradiso Massif in the footwall and Lower Piedmont Zone in the hanging wall. Both tectono-metamorphic units, with a different paleogeographic affinity, preserve similar polyphasic deformation histories, defined by four deformation phases. The Dp phase, strongly transposing previous structural relicts, is marked by a high-pressure assemblage associated with the Sp foliation. Dp controls the lithological boundary attitude. A mylonitic zone, developed during the Dp, showing kinematic indicators pointing to a top-to-the N-NW sense of shear, is responsible for the juxtaposition of the two units. Dp structural elements are deformed by Dp+1 and Dp+2 subsequent phases. A greenschist-facies overprinting was observed during the Dp+1 phase. |
| doi_str_mv | 10.1080/17445647.2021.1911869 |
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A geological map at the 1:10.000 scale, integrated with meso- and microstructural analysis, has been realised. We investigated the contact area between Gran Paradiso Massif in the footwall and Lower Piedmont Zone in the hanging wall. Both tectono-metamorphic units, with a different paleogeographic affinity, preserve similar polyphasic deformation histories, defined by four deformation phases. The Dp phase, strongly transposing previous structural relicts, is marked by a high-pressure assemblage associated with the Sp foliation. Dp controls the lithological boundary attitude. A mylonitic zone, developed during the Dp, showing kinematic indicators pointing to a top-to-the N-NW sense of shear, is responsible for the juxtaposition of the two units. Dp structural elements are deformed by Dp+1 and Dp+2 subsequent phases. A greenschist-facies overprinting was observed during the Dp+1 phase.</description><identifier>ISSN: 1744-5647</identifier><identifier>EISSN: 1744-5647</identifier><identifier>DOI: 10.1080/17445647.2021.1911869</identifier><language>eng</language><publisher>Abingdon: Taylor & Francis</publisher><subject>Contact pressure ; Deformation ; Earth science ; Geologic mapping ; Geological mapping ; Geology ; Gran Paradiso Massif ; Hanging walls ; Kinematics ; Massifs ; Microstructural analysis ; polyphase deformation ; structural geology ; Structural members ; Valleys ; Western Alps</subject><ispartof>Journal of maps, 2021-12, Vol.17 (2), p.237-246</ispartof><rights>2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group 2021</rights><rights>2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This work is licensed under the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (the “License”). 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A greenschist-facies overprinting was observed during the Dp+1 phase.</description><subject>Contact pressure</subject><subject>Deformation</subject><subject>Earth science</subject><subject>Geologic mapping</subject><subject>Geological mapping</subject><subject>Geology</subject><subject>Gran Paradiso Massif</subject><subject>Hanging walls</subject><subject>Kinematics</subject><subject>Massifs</subject><subject>Microstructural analysis</subject><subject>polyphase deformation</subject><subject>structural geology</subject><subject>Structural members</subject><subject>Valleys</subject><subject>Western Alps</subject><issn>1744-5647</issn><issn>1744-5647</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>0YH</sourceid><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><sourceid>DOA</sourceid><recordid>eNp9kd-LEzEQgBdR8Dz9E4SALwrXmmTzY_fNcmgtVDxEFHwJ02RypqSbmmw51r_erD3FJ59mmMx8M-FrmueMLhnt6GumhZBK6CWnnC1Zz1in-gfNxVxfzA8P_8kfN09K2VMqO9rJi-bnGlNMtxNJnozfkZR0qiEPZJ1hIDeQwYWSyAcoJXgCgyPbdIeZ3AR0hzSM5FsakNiagR0JZATy8hCci0hWEcgXiBGnK_IVyzhTV_FYrshmhDi9eto88hALPruPl82nd28_X79fbD-uN9er7QKEFuMCJWhmtedUMeo6LwTX3nOOOy05Bdl7QECLdqccVztoUapeaYqMK9ZeNpsz1CXYm2MOB8iTSRDM70LKtwbyGGxEo1gndn0rvdad4EL0VqNA0VKkaEHQynpxZh1z-nGqPzL7dMpDvd20tNOSCdb2tUueu2xOpWT0f7cyamZf5o8vM_sy977q3JvzXBh8yge4Szk6M8IUU_ZVhg11zf8RvwDi7ZtO</recordid><startdate>20211201</startdate><enddate>20211201</enddate><creator>Caso, F.</creator><creator>Nerone, S.</creator><creator>Petroccia, A.</creator><creator>Bonasera, M.</creator><general>Taylor & Francis</general><general>Taylor & Francis Ltd</general><general>Taylor & Francis Group</general><scope>0YH</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7ST</scope><scope>7XB</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>M2O</scope><scope>MBDVC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>SOI</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0001-7277-2454</orcidid><orcidid>https://orcid.org/0000-0002-1136-2811</orcidid><orcidid>https://orcid.org/0000-0003-1580-2519</orcidid><orcidid>https://orcid.org/0000-0001-5230-0046</orcidid></search><sort><creationdate>20211201</creationdate><title>Geology of the southern Gran Paradiso Massif and Lower Piedmont Zone contact area (middle Ala Valley, Western Alps, Italy)</title><author>Caso, F. ; 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| subjects | Contact pressure Deformation Earth science Geologic mapping Geological mapping Geology Gran Paradiso Massif Hanging walls Kinematics Massifs Microstructural analysis polyphase deformation structural geology Structural members Valleys Western Alps |
| title | Geology of the southern Gran Paradiso Massif and Lower Piedmont Zone contact area (middle Ala Valley, Western Alps, Italy) |
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