Geodetic evidence for continuing tectonic activity of the Carboneras fault (SE Spain)

Echeverría, Anna; Khazaradze, Giorgi; Asensio, Eva; Masana, Eulàlia

doi:10.1016/j.tecto.2015.08.009

Cited by 24 publications

(25 citation statements)

References 55 publications

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“…Our GPS study, which is located at the NE end of the EBSZ, shows that the mean shortening rate in the Bajo Segura Basin is 0.6 ± 0.2 mm/year. These shortening values are consistent with those obtained by the CuaTeNeo GPS network (Echeverria et al, ) in the central part of the EBSZ (Figure ; Echeverria et al, , ), where the estimated shortening rate is 0.8 ± 0.4 mm/year in the N315E direction. Consequently, our GPS data, together with those published by Echeverria et al (), indicate that despite the low signal‐to‐noise ratios, the EBSZ accommodates a significant fraction (~25%, i.e., 0.6–0.8 ± 0.4 mm/year) of the overall convergence in the Eastern Betic Cordillera and Mediterranean Sea (between 1.6 and 2.7 mm/year according to Serpelloni et al, , or approximately 2 mm/year according to Pérez‐Peña et al, ).…”

Section: Discussionsupporting

confidence: 90%

“…This GPS‐derived strike‐slip rate is lower than those obtained by Echeverria et al (, ) in the central and SW sectors of the EBSZ (CuaTeNeo GPS network). These authors estimated left‐lateral slip rates of 1.3 ± 0.2 mm/year for the Carboneras fault (SW of the EBSZ) and 1.5 ± 0.3 mm/year for the Alhama de Murcia fault (in the central part of the EBSZ; Figure ).…”

Section: Discussioncontrasting

confidence: 66%

“…Palano et al () postulated the existence of an indenter located at the northern limit of the Nubian plate, which transferred a fraction of the convergence rate into the Eastern Betic Cordillera. We consider that the model of Palano et al () best explains the geological observations, seismicity, and detailed GPS data recently obtained from local networks (Echeverria et al, , , and data presented in this work). Geological, seismological, and geodetic data indicate that the central and Eastern Betic Cordillera are two different tectonic domains (De Larouzière et al, ; Echeverria et al, , ; Galindo‐Zaldívar et al, ; Silva et al, , among many others).…”

Section: Discussionmentioning

confidence: 77%

“…Left‐lateral displacement rate decreases in our study area with respect to the central EBSZ, probably because of the change in strike of this regional tectonic corridor (approximately N45E in the south and central sectors and N70E to ~N‐S in the study area). Data to the west of the Bajo Segura Network after Echeverria et al, , ). Legend as in Figure a.…”

Section: Discussionmentioning

confidence: 99%

“…We designed the GPS network of the Bajo Segura Basin, which contains 11 sites, in 1999 (Figure b). This network, which is located to the east of the CuaTeNeo GPS network (Echeverria et al, , ), covers the seismogenic area of the 1829 Torrevieja earthquake and the 1919 Jacarilla‐Torremendo earthquake. In this paper, we estimate, for the first time, the velocity field and strain rates of one of the areas with the highest seismic hazard in the Iberian Peninsula.…”

Section: Introductionmentioning

confidence: 99%

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How Much Nubia‐Eurasia Convergence Is Accommodated by the NE End of the Eastern Betic Shear Zone (SE Spain)? Constraints From GPS Velocities

et al. 2019

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We present the first GPS‐derived geodetic observations from the NE end of the Eastern Betic Shear Zone obtained from the Bajo Segura GPS network (SE Spain). The network has 11 GPS sites and was sampled four times between 1999 and 2013. Despite the low signal‐to‐noise ratio of the residual velocities obtained, the velocities are nonzero at 95% confidence level. We postulate that the GPS data point to the partitioning of deformation into the NNW–SSE shortening and a N70E left‐lateral component. The maximum deformation rates are located along the two main active faults in the study area. The maximum shortening rates (north component) in the southern region of the Bajo Segura Basin vary from west to east, ranging from 0.2 to 0.7 mm/year along the Bajo Segura Fault Zone. On the northern border of the basin, along the Crevillente Fault Zone, left‐lateral displacement varies between 0.4 and 0.7 mm/year in the E‐W direction. The GPS‐based regional geodynamic models of the Western Mediterranean indicate that the residual shortening of the Eurasia‐Nubia plate convergence is accommodated in the eastern part of the Iberian Peninsula and the Algero‐Balearic Basin. Our results indicate that part of this residual deformation occurs at the NE end of the Eastern Betic Shear Zone, but significant deformation must be accommodated also to the north (External Betics) and to the south (Cartagena Basin and offshore area). We postulate that Eurasia‐Nubia plate convergence is transferred to the Eastern Betics because of the thin and rigid (potentially oceanic) crust of the Algero‐Balearic Basin, which acts as an indenter.

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Section: Discussionsupporting

confidence: 90%

Section: Discussioncontrasting

confidence: 66%

Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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How Much Nubia‐Eurasia Convergence Is Accommodated by the NE End of the Eastern Betic Shear Zone (SE Spain)? Constraints From GPS Velocities

et al. 2019

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Tidally influenced deposits in the Río Alías Strait connecting a marginal basin with the Mediterranean Sea (Pliocene, South‐East Spain)

Sola,

Puga‐Bernabéu,

Braga

2024

The Depositional Record

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The Río Alías Strait developed in the Early Pliocene as a narrow marine corridor at the connection of the microtidal Mediterranean Sea and the north‐eastern margin of the Almería‐Níjar Basin in the eastern Betic Cordillera (South‐East Spain). The orientation and topography of the strait were controlled by the transpressive Carboneras and Polopos/South Cabrera fault systems. Ten sedimentary facies occur in the up to 150 m thick mixed biogenic carbonate‐terrigenous succession distinguished on the basis of their lithology, components, grain size, stratal geometries and sedimentary structures, which were observed in seven sections at well‐exposed outcrops of four sectors. The sedimentary record of the Río Alías Strait reflects the morphological constraints, which conditioned its sedimentary dynamics and facies distribution. Even in this microtidal setting, tidal current amplification through narrow constrictions produced thick accumulations of large cross‐stratified bodies up to 15 m thick formed by the opposite migration of three‐dimensional simple and compound dunes. The Río Alías Strait reconstruction shows: (1) a very narrow constriction in the central sector from which “constriction‐related deltas” (CRDs) formed in the flood downstream (westward) and ebb (upstream) directions and (2) a relatively deep depression (>65 m water depth) separating the eastern and central‐east sectors, where tidal current energy was attenuated and dunes were not generated. The closure of the strait resulted from the tectonic uplift of the antecedent upland of Sierra Cabrera at the northern side, which promoted the southward progradation of deltaic systems over the strait. The Río Alías Strait represents the only clear record of a microtidal strait in the Betic Cordillera since the Miocene. The case study presented here improves existing models on the sedimentary dynamics of ancient tidal‐dominated straits by expanding the knowledge on their spatial environment variability.

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Active Deformation in the Iberian Peninsula from Geodetic Techniques

Ruano

Fernandes

2019

The Geology of Iberia: A Geodynamic Approach

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Geodetic evidence for continuing tectonic activity of the Carboneras fault (SE Spain)

Cited by 24 publications

References 55 publications

How Much Nubia‐Eurasia Convergence Is Accommodated by the NE End of the Eastern Betic Shear Zone (SE Spain)? Constraints From GPS Velocities

How Much Nubia‐Eurasia Convergence Is Accommodated by the NE End of the Eastern Betic Shear Zone (SE Spain)? Constraints From GPS Velocities

Tidally influenced deposits in the Río Alías Strait connecting a marginal basin with the Mediterranean Sea (Pliocene, South‐East Spain)

Active Deformation in the Iberian Peninsula from Geodetic Techniques

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