Geodynamics of the Emile Baudot Escarpment and the Balearic Promontory, western Mediterranean

Acosta, Juan; Muñoz, Araceli; Herranz, P.; Palomo, C.; Ballesteros, M.; Vaquero, M.; Uchupi, Elazar

doi:10.1016/s0264-8172(01)00003-4

Cited by 55 publications

(72 citation statements)

References 23 publications

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“…This weak activity is the likely reason for the scarcity of studies of the active tectonics (Silva et al, 1997(Silva et al, , 1999(Silva et al, , 2000(Silva et al, , 2001Giménez and Gelabert, 2002;Giménez, 2003;Gelabert et al, 2005). Other onshore studies have described the Plio-Quaternary activity in the Balearic Promontory (Roca, 1996;Acosta et al, 2001Acosta et al, , 2002Acosta et al, , 2004Maillard and Mauffret, 2013).…”

Section: Introductionmentioning

confidence: 93%

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Crustal velocity and strain rate fields in the Balearic Islands based on continuous GPS time series from the XGAIB network (2010–2013)

Sánchez‐Alzola

Sánchez

Giménez

et al. 2014

Journal of Geodynamics

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Crustal velocity and strain rate fields in the Balearic Islands based on continuous GPS time series from the XGAIB network (2010)(2011)(2012)(2013), Journal of Geodynamics (2014), http://dx.doi.org/10. 1016/j.jog.2014.05.005 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractIn this paper, we present a first estimation, using the GIPSY-OASIS software, of the crustal velocity and strain rate fields in the Balearic Islands (Spain), based on continuous GPS observations from the XGAIB network spanning the period 2010-2013. The XGAIB network consists of nine permanent, widely distributed stations that have operated continuously since 2010. In this paper, we describe the XGAIB network and the CGPS data processing and present our principle results in terms of the position time series and velocities of all of the sites, which were observed for more than three and a half years. In addition, strain tensors were estimated from the velocity field to obtain the first realistic crustal deformation model of the archipelago.The strains exhibit gradual variation across the Balearic Islands, from WNW-ESE extension in the southwest (Ibiza and Formentera) to NW-SE compression in the A c c e p t e d M a n u s c r i p t 2 northeast (Menorca). These results constitute an advance in our knowledge of the tectonics of the western Mediterranean region. Highlights-We model the crustal velocity and strain rate fields in the Balearic Islands.-We use continuous GPS observations from a permanent GNSS network.-The strains exhibit gradual variation from WNW-ESE in the southwest to NW-SE in the northeast.

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Section: Introductionmentioning

confidence: 93%

“…Several investigations (Roca, 1996;Acosta et al, 2001Acosta et al, , 2002Acosta et al, and 2004Maillard and Mauffret, 2013) describe NE-SW and NW-SE normal and strike-slip faults affecting the Plio-Quaternary materials in the offshore area of the Balearic Islands.…”

Section: Geodynamic Settingmentioning

confidence: 99%

Crustal velocity and strain rate fields in the Balearic Islands based on continuous GPS time series from the XGAIB network (2010–2013)

Sánchez‐Alzola

Sánchez

Giménez

et al. 2014

Journal of Geodynamics

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“…These data were used to generate topographic maps and digital terrain models of the area (Muñoz et al, 1997) that met the standards specified by the International Hydrographic Organization (1997) for multibeam surveys. The last investigation is part of the survey of Spanish Exclusive Economic Zone by the Instituto Español de Oceanografia and the Instituto Hidrográ-fico de la Marina (Acosta et al, 2001a). …”

Section: Methodsmentioning

confidence: 99%

“…As no wells have been drilled on the promontory and the DSDP and ODP sites (see Acosta et al, 2001a and references therein) are off the promontory in the adjacent deep basins any data regarding the nature of the stratigraphy of the region is of urgent need for those working in the western Mediterranean. No matter how meager the data may be, these data should be circulated as widely as possible.…”

Section: Introductionmentioning

confidence: 99%

Early Pleistocene volcanism in the Emile Baudot Seamount, Balearic Promontory (western Mediterranean Sea)

et al. 2004

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The recovery of calcareous breccia and other carbonate-cemented rocks from Mont dels Oliva in the Balearic Promontory indicates that both this seamount and the adjacent Mont Ausias Marc, east of Ibiza and Formentera islands, are of continental origin. Recent multibeam echosounder mapping and high-resolution seismic reflection profiles indicate that the third high, Emile Baudot Seamount, is located within a field of more than 118 pinnacles. Based on their magnetic signature and the recovery of basalt in the vicinity of the pinnacles suggest that the features are of volcanic origin. A basalt sample dredged from Emile Baudot Seamount indicates an igneous origin for this seamount. The limited sampling, the chemistry of the rock recovered and the size of the seamount itself (18 by 3 km), however, does not preclude the possibility that Emile Baudot may be a fractured uplifted continental block intruded by the basalt. The K/Ar age of 1.46 F 0.18 my yielded by the basalt sample verifies the earlier proposal by Acosta et al. (Mar. Pet. Geol. 128 (2001a) 349) that the volcanism that created part or all of Emile Baudot Seamount and the Southwest Majorca Volcanic Field associated with the seamount took place in the Pleistocene. This volcanism is probably related to decompression resulting from the normal faulting that led to the subsidence of the low (Central Depression) between Ibiza and Majorca (Balearic Islands).

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“…Fluid escape features are present throughout the Balearic Promontory (Acosta et al 2001), including in the Eivissa Channel . Here, pockmarks have been identified to the north of the Xàbia Seamount, where their high abundance gives the seafloor an orange peel-like appearance, and on the Balearic continental slope where they are often aligned.…”

Section: Geological Settingmentioning

confidence: 99%

Eivissa slides, western Mediterranean Sea: morphology and processes

et al. 2006

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After obtaining full-coverage swath bathymetry data in 1995 and very high-resolution acoustic profiles in 2002, four slides at the Balearic Margin of the Eivissa Channel in the western Mediterranean Sea were revisited in 2004 when side-scan sonar data were collected using a MAK-1M deep-towed acoustic system. These new findings, higher in resolution than those for the swath bathymetry, show two main features previously undetected within these submarine landslides: (1) a series of step-forming inclined and detached slabs oriented perpendicular to the slide movement and located in the uppermost part of the slides, and (2) arcuate regular positive ridges oriented also normal to the slide movement and located in the depositional lobes of some of the slides. The former are interpreted as extensional ridges, suggesting a retrogressive post-failure evolution of the slides. The latter are interpreted as compression ridges, related to plastic deformation of the sediment before movement freezing. Moreover, the new data show that fluid escape features are even more widespread in the Eivissa Channel than previously thought, dozens of new pockmarks less than 20 m in diameter having been identified

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Geodynamics of the Emile Baudot Escarpment and the Balearic Promontory, western Mediterranean

Cited by 55 publications

References 23 publications

Crustal velocity and strain rate fields in the Balearic Islands based on continuous GPS time series from the XGAIB network (2010–2013)

Crustal velocity and strain rate fields in the Balearic Islands based on continuous GPS time series from the XGAIB network (2010–2013)

Early Pleistocene volcanism in the Emile Baudot Seamount, Balearic Promontory (western Mediterranean Sea)

Eivissa slides, western Mediterranean Sea: morphology and processes

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