Structural geology and geochronology of the Comondú Group in the Tembabichi area, Baja California Sur, México
This study provides a geological map and regional interpretation of an area spanning E-W across the southern Baja California peninsula, Mexico. Characterizing the kinematics and timing of deformation within the Comondú Group (Oligocene–Miocene) is crucial to understand the evolution of the Gulf of C...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-12-01
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| Series: | Journal of Maps |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/17445647.2025.2499010 |
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| author | Diego Gracia-Marroquín Mariano Cerca Margarita López-Martínez Marco Bonini Teresa Orozco-Esquivel |
| author_facet | Diego Gracia-Marroquín Mariano Cerca Margarita López-Martínez Marco Bonini Teresa Orozco-Esquivel |
| author_sort | Diego Gracia-Marroquín |
| collection | DOAJ |
| description | This study provides a geological map and regional interpretation of an area spanning E-W across the southern Baja California peninsula, Mexico. Characterizing the kinematics and timing of deformation within the Comondú Group (Oligocene–Miocene) is crucial to understand the evolution of the Gulf of California rift. Structural evidence indicates that the Lower Comondú volcanic and sedimentary sequence (dated ∼29–19 Ma) was deposited in a sedimentary basin bounded by regional west-dipping normal faults, reflecting the progressive development of a broad extensional zone. We document NW to NE-trending, SW to NW-dipping normal faults, along with mafic and pyroclastic dykes dated between 18 and 15 Ma that share similar kinematic characteristics. Our findings suggest that these dykes were emplaced along pre-existing normal faults affecting the Lower to Middle Comondú Group. The geochronological and structural data presented on the main map provide new insights for deciphering the complex geological evolution of this region. |
| format | Article |
| id | doaj-art-15418ee9bfc84fe99e27a7fc8ed7f2c8 |
| institution | DOAJ |
| issn | 1744-5647 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Maps |
| spelling | doaj-art-15418ee9bfc84fe99e27a7fc8ed7f2c82025-08-20T03:11:04ZengTaylor & Francis GroupJournal of Maps1744-56472025-12-0121110.1080/17445647.2025.2499010Structural geology and geochronology of the Comondú Group in the Tembabichi area, Baja California Sur, MéxicoDiego Gracia-Marroquín0Mariano Cerca1Margarita López-Martínez2Marco Bonini3Teresa Orozco-Esquivel4Posgrado en Ciencias de la Tierra, Instituto de Geociencias, Universidad Nacional Autónoma de México, Querétaro, Qro, MexicoInstituto de Geociencias, Universidad Nacional Autónoma de México, Querétaro, Qro, MexicoDepartamento de Geología, Centro de Investigación Científica y Educación Superior, CICESE, Ensenada, MéxicoCNR, Consiglio Nazionale delle Ricerche (CNR), Istituto di Geoscienze e Georisorse (IGG), Firenze, ItalyInstituto de Geociencias, Universidad Nacional Autónoma de México, Querétaro, Qro, MexicoThis study provides a geological map and regional interpretation of an area spanning E-W across the southern Baja California peninsula, Mexico. Characterizing the kinematics and timing of deformation within the Comondú Group (Oligocene–Miocene) is crucial to understand the evolution of the Gulf of California rift. Structural evidence indicates that the Lower Comondú volcanic and sedimentary sequence (dated ∼29–19 Ma) was deposited in a sedimentary basin bounded by regional west-dipping normal faults, reflecting the progressive development of a broad extensional zone. We document NW to NE-trending, SW to NW-dipping normal faults, along with mafic and pyroclastic dykes dated between 18 and 15 Ma that share similar kinematic characteristics. Our findings suggest that these dykes were emplaced along pre-existing normal faults affecting the Lower to Middle Comondú Group. The geochronological and structural data presented on the main map provide new insights for deciphering the complex geological evolution of this region.https://www.tandfonline.com/doi/10.1080/17445647.2025.2499010Comondú GroupGulf of California rift40Ar/39Ar datingWest dipping normal faultsmafic dykespyroclastic dykes |
| spellingShingle | Diego Gracia-Marroquín Mariano Cerca Margarita López-Martínez Marco Bonini Teresa Orozco-Esquivel Structural geology and geochronology of the Comondú Group in the Tembabichi area, Baja California Sur, México Journal of Maps Comondú Group Gulf of California rift 40Ar/39Ar dating West dipping normal faults mafic dykes pyroclastic dykes |
| title | Structural geology and geochronology of the Comondú Group in the Tembabichi area, Baja California Sur, México |
| title_full | Structural geology and geochronology of the Comondú Group in the Tembabichi area, Baja California Sur, México |
| title_fullStr | Structural geology and geochronology of the Comondú Group in the Tembabichi area, Baja California Sur, México |
| title_full_unstemmed | Structural geology and geochronology of the Comondú Group in the Tembabichi area, Baja California Sur, México |
| title_short | Structural geology and geochronology of the Comondú Group in the Tembabichi area, Baja California Sur, México |
| title_sort | structural geology and geochronology of the comondu group in the tembabichi area baja california sur mexico |
| topic | Comondú Group Gulf of California rift 40Ar/39Ar dating West dipping normal faults mafic dykes pyroclastic dykes |
| url | https://www.tandfonline.com/doi/10.1080/17445647.2025.2499010 |
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