Tectonic geomorphology of the Fortuna Fault and the Venado Transtensive system, northern Costa Rica
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| Authors: | , , |
|---|---|
| Format: | capítulo de libro |
| Publication Date: | 2024 |
| Description: | The northwestern dextral strike-slip Haciendas-Chiripa fault system crosses the backarc region of northern Costa Rica. This system defines the eastern border of the Guanacaste Volcanic Arc Sliver, which is moving northwest at ~ 11 mm year−1 and nearly parallel to the Middle America Trench. The NW-oriented dextral strike-slip Fortuna Fault is a branch within the Haciendas-Chiripa fault system. A right bend along the Fortuna Fault in the Venado region originates the Venado Transtensive Zone. The Venado region is located within a backarc Miocene sedimentary basin, including sandstone, mudstone, and limestone (with karst), covered by Plio-Quaternary volcanic rocks. The Fortuna Fault and the Venado Transtensive Zone were defined using geomorphological and geological evidence. Tectonic landforms typical of strike-slip and normal faulting (e.g., scarps, linear valleys, and displaced drainages) were identified in the study region. The Venado dilatational stepover developed inside a tilted planation surface, causing Pleistocene to Holocene alluvial depocenters to locate in its eastern sector. Our work contributes to a better definition of the Haciendas-Chiripa fault system and its relationship with the tectonic sliver in northern Costa Rica. |
| Country: | Kérwá |
| Institution: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| Language: | Inglés |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/102138 |
| Online Access: | https://hdl.handle.net/10669/102138 https://doi.org/10.1007/978-3-031-64940-0_15 |
| Keyword: | active tectonics tectonic geomorphology Fortuna Fault Venado Transtensive system karst caves photogrammetry speleoseismology |