DSpace Collection:https://cir.cenieh.es/handle/20.500.12136/212026-07-24T22:53:27Z2026-07-24T22:53:27ZEditorial - 6th Asia-Pacific Luminescence and Electron Spin Resonance Dating (APLED2022) online Conference, 26-28 September 2022Şahiner, ErenDuval, Mathieuhttps://cir.cenieh.es/handle/20.500.12136/33582024-12-05T02:00:21Z2024-01-01T00:00:00ZTitle: Editorial - 6th Asia-Pacific Luminescence and Electron Spin Resonance Dating (APLED2022) online Conference, 26-28 September 2022
Authors: Şahiner, Eren; Duval, Mathieu
Description: Conferencia presentada: 6th Asia-Pacific Luminescence and Electron Spin Resonance Dating (APLED2022) online Conference, 26-28 September 20222024-01-01T00:00:00ZEvolution of deep-seated gravitational slope deformation in a deep valley of the Czech Flysch CarpathiansVladimír, ChalupaPánek, TomášBřežný, MichalGutiérrez, FranciscoMedialdea, Aliciahttps://cir.cenieh.es/handle/20.500.12136/33592024-12-11T16:17:28Z2025-02-01T00:00:00ZTitle: Evolution of deep-seated gravitational slope deformation in a deep valley of the Czech Flysch Carpathians
Authors: Vladimír, Chalupa; Pánek, Tomáš; Břežný, Michal; Gutiérrez, Francisco; Medialdea, Alicia
Abstract: In the Czech Outer Western Carpathians (OWC), the lower limit of deep-seated gravitational slope deformations (DSGSDs) occur associated with moderate local relief and slope gradient, showing a limited degree of geomorphic development. Here, DSGSDs display a relatively high spatial frequency, despite the limited tectonic and seismic activity, often claimed as major preparatory and triggering factors. Nonetheless, favourable stratigraphic and structural features in flysch successions, together with fluvial downcutting, provide conditions prone to DSGSDs. The study area of Travný Mt. hosts the typical DSGSDs in the highest part of Czech OWC. With the aim of unravelling the controlling and triggering factors, the internal structure, and the timing and kinematics of mass-movement activity, a multidisciplinary investigation was performed. LiDAR-based and field geomorphological mapping allowed to constrain the extent of the of DSGSD, expressed by characteristic landforms such as antislope scarps and grabens. The structural analysis and geophysical surveys (ERT and GPR) provided insight into the internal structure of the DSGSD, reaching a depth of >100 m, and supported its mountain-scale spatial propagation. The instability is controlled by inherited faults, deep-penetrating joints and and the stratigraphic contact between brittle caprock overlying weaker rocks. Morphologically, the most prominent deformation is located in the upper part, which is dominated by toppling of flysch blocks with thick-bedded sandstone. The results of the trenching technique and geochronological analyses point to the episodic kinematics of this portion of the DSGSD, revealing a significant displacement event (ca. 9.9 ka) linked to a major climate change occurred after the Late Glacial/Holocene transition.2025-02-01T00:00:00ZPresent‐day shortening accommodated by folding, thrusting andstrike‐slip faulting in the Enriquillo basin of southern centralHispaniola: Implications for the regional seismic hazardEscuder-Viruete, J.Fernández, F.J.Pérez Valera, F.Medialdea, AliciaCastillo-Carrión, M.https://cir.cenieh.es/handle/20.500.12136/33682026-02-20T09:42:42Z2025-01-01T00:00:00ZTitle: Present‐day shortening accommodated by folding, thrusting andstrike‐slip faulting in the Enriquillo basin of southern centralHispaniola: Implications for the regional seismic hazard
Authors: Escuder-Viruete, J.; Fernández, F.J.; Pérez Valera, F.; Medialdea, Alicia; Castillo-Carrión, M.
Abstract: AbstractHispaniola accommodates a significant portion of the present‐day convergence between Caribbean and North American plates. Located in southern Hispaniola, the Neogene Enriquillo basin is bounded by the Neiba and Bahoruco mountain ranges. The
role of active individual faults and fault systems in this basin is not well understood, particularly their geometry and kinematics, slip rates and seismic activity. Knowing this
information is important to characterize the active deformation pattern in southern Hispaniola, but it is also crucial to estimate the regional seismic hazard. Here, we analyze GPS geodetic data and seismicity and present the results of fault mapping of the Enriquillo basin based on tectonic field observations, radiocarbon and luminescence dating, remote sensing and regional magnetic data. These observations indicate
that WNW to NW‐trending thrust faults and associate large‐scale folds, as well as minor strike‐slip and normal faults, have been active both in the Tertiary rocks within the mountain ranges and in the basin margins along the Quaternary. Inversion of fault‐slip data establishes that a NE‐directed shortening has controlled the formation of these structures. We propose a regional kinematic model in which the present‐day kinematics of each main fault depend strongly on its orientation with respect to the regional stress tensor. Computed seismic hazard defines a map pattern for the peak ground acceleration elongated to the main seismotectonic fault zones. Regions around the southwest Sierra de Neiba, the western Enriquillo basin and the northwest
Sierra de Bahoruco, where peak ground acceleration exceed 500cm/s2, have a high seismic hazard.
Description: The data for this paper are contained in the text, figures and supporting information and can also be found in the data repository DIGITAL.CSIC which is the institutional repository of the Spanish National Research Council (Escuder-Viruete et al., 2024b).2025-01-01T00:00:00ZVenturas y desventuras de la datación por luminiscencia para el estudio de fallas activas en Nueva ZelandaMedialdea, AliciaGonzalez Santos, M.Villamor Pérez, P.Clark, K.Lowe, D. J.https://cir.cenieh.es/handle/20.500.12136/34242026-02-20T09:43:23Z2024-12-01T00:00:00ZTitle: Venturas y desventuras de la datación por luminiscencia para el estudio de fallas activas en Nueva Zelanda
Authors: Medialdea, Alicia; Gonzalez Santos, M.; Villamor Pérez, P.; Clark, K.; Lowe, D. J.
Abstract: Disponer de una cronología robusta es crucial para entender la evolución tectónica en Nueva Zelanda.
Los intentos por aplicar la datación por luminiscencia en esta región han sido numerosos en los últimos años. En muchos casos, el método se ha visto comprometido por la naturaleza volcánica de los minerales a estudio (cuarzo y feldespato) que presenta, a menudo, una respuesta inestable a partir de la cual, no es posible estimar una edad. En este trabajo, las medidas de luminiscencia de cuarzo y feldespato de tamaño superior a 90 μm confirman la imposibilidad de utilizar ese material para obtener una datación fiable; sin embargo, los granos minerales finos (4-11 μm) tienen una respuesta luminiscente estable y reproducible a partir de la que estimar una edad de depósito precisa. Este comportamiento ha sido observado anteriormente por otros autores (Avram et al., 2022). La diferencia en la respuesta entre el material grueso y el fino sugiere que éstos pueden ser sedimentos transportados desde depósitos con cuarzo y feldespato de origen no volcanico.
A partir de la medida de la luminiscencia de granos finos se ha podido establecer un registro cronológico de secuencias de sedimentos afectados por la falla de Te Puninga (Villamor et al., 2024) permitiendo entender su actividad en los últimos 45 ka.
Description: Ponencia presentada en: XI Congreso Geológico de España2024-12-01T00:00:00Z