Palaeomagnetic rotations in opposite senses in southeastern Spain

Calvo, Manuel G.; Osete, M. L.; Vegas, R.

doi:10.1029/94gl00191

Cited by 22 publications

(12 citation statements)

References 16 publications

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“…Magnetic susceptibility was measured in some volcanic rocks cropping out in the area, giving values between DEVELOPMENT OF ALMEPdA-NIJAR BASIN The palaeomagnetic studies in the area (Calvo et al 1994) confirm that the volcanic rocks have not undergone large rotations. In the models we can distinguish two groups of volcanic rock with susceptibility values between 2 x 10 .3 and 25 x 10 .3 SI, and greater than 50 x 10 .3 SI, respectively.…”

Section: Geophysical Data and Deep Structurementioning

confidence: 95%

Fault and fold interaction during the development of the Neogene-Quaternary Almería-Níjar basin (SE Betic Cordilleras)

Pedrera

Marín‐Lechado

Galindo-Zaldı́var

et al. 2006

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The Neogene-Quaternary Almerfa-Nfjar basin includes the Carboneras Fault, which constitutes a major left-lateral feature of the Betic Cordilleras. New gravity data help to determine the geometry of the sedimentary infill. The region underwent NE-SW extension during the Tortonian and local NW-SE compression during the first stages of Sierra Alhamilla uplift. During the Messinian, the sinistral strike-slip motion along the Carboneras Fault Zone, the dextral strike-slip motion along NW-SE-oriented faults, and the development of large folds such as the Sierra Alhamilla antiform, suggest clockwise rotation (towards the north) of the maximum stress axis (o1). During the Pliocene, a NNW-SSE-oriented compression also contributes to fold development. Finally, during the Quaternary, an ENE-WSW-directed extension controls the development of NW-SE-oriented normal oblique faults. The most recent local normal activity of the Carboneras Fault is related to this extension, whereas its behaviour as a left-lateral strike-slip fault may be a consequence of the accommodation of NW-SE normal fault displacements. Basic rock bodies, recognized by means of a detailed study of the magnetic anomalies, are related to the volcanic activity known to have occurred in the area in Late Miocene times. Rutter et al. 1986;Montenat et al. 1987;Weijermars 1987; Montenant & Ott d'Estevou 1990;Silva et al. 1993), that probably continue into the Alboran Sea and into the northern Rif Cordilleras and constitute the Trans-Alboran Shear Zone (Larouzi~re et al. 1988).

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Section: Geophysical Data and Deep Structurementioning

confidence: 95%

Fault and fold interaction during the development of the Neogene-Quaternary Almería-Níjar basin (SE Betic Cordilleras)

Pedrera

Marín‐Lechado

Galindo-Zaldı́var

et al. 2006

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“…Thus, the problem of determining the time of completion of rotations is still unsolved. On the other hand, a study on mainly voleanic rocks of Late Miocene age carried out by Calvo et al (1994) in the Cabo de Gata region (Internal Betics), at the southeastern tip of Spain, has documented a behaviour different from the more systematic rotation pattern of the previously studied units in the External Betics, i.e. small clockwise and anticlockwise rotations of adjacent blocks.…”

Section: Introductionmentioning

confidence: 99%

Palaeomagnetic results from Upper Miocene and Pliocene rocks from the Internal Zone of the eastern Betic Cordilleras (southern Spain)

1997

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“…Most of the dykes in the Cabo de Gata volcanic zone are subparallel to the former fault sets, in particular to north-south directed faults. Fault displacement ranges from less than 1 m to more than 100 m, and is responsible for the clockwise and counter-clockwise block rotations observed in the Cabo de Gata volcanic zone (Calvo et al 1994). However, at the regional scale, the main sense of vertical axis rotation is counter-clockwise owing to the activity of left-lateral strike-slip faults .…”

Section: Geological Setting Of Cabo De Gatamentioning

confidence: 99%

Magma flow within dykes in submarine hyaloclastite environments: an AMS study of the Miocene Cabo de Gata volcanic units

Porreca

Cifelli

Soriano

et al. 2014

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The Miocene Cabo de Gata volcanic arc in SE Spain comprises a wide variety of volcanic\ud facies and eruptive styles in subaqueous to subaerial environments. In the SW sector of the\ud area, 5–100 m-thick, NNW–SSE-orientated dykes feed and intrude submarine hyaloclastite\ud deposits. We analysed the anisotropy of magnetic susceptibility (AMS) of six dykes and five hyaloclastite\ud sites from three volcanic units: the Cerro Can˜adillas, Los Frailes, and El Barronal formations.\ud The main magnetic minerals are primary low-Ti titanomagnetite and magnetite. The\ud AMS ellipsoids in the dykes are generally oblate-triaxial in shape, with magnetic foliations subparallel\ud to the dyke walls. Kinematic field evidence supports the inferred flow directions deduced from\ud magnetic lineation and imbrication of magnetic foliation. The geometric relationships between\ud dyke margins and AMS axes indicate that dykes at El Barronal were emplaced via prevalent subvertical\ud upward magma flow. The inferred flow directions are reproduced well by analogue models\ud of AMS simulating magma migration in dykes with a diapiric geometry. The other dykes were\ud emplaced by lateral magma propagation. Conversely, hyaloclastite shows a large scatter of the\ud AMS axes reflecting different degrees of fragmentation. We observe a gradual increase in\ud scatter in the AMS from confined dykes to fragmented hyaloclastite

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Palaeomagnetic rotations in opposite senses in southeastern Spain

Cited by 22 publications

References 16 publications

Fault and fold interaction during the development of the Neogene-Quaternary Almería-Níjar basin (SE Betic Cordilleras)

Fault and fold interaction during the development of the Neogene-Quaternary Almería-Níjar basin (SE Betic Cordilleras)

Palaeomagnetic results from Upper Miocene and Pliocene rocks from the Internal Zone of the eastern Betic Cordilleras (southern Spain)

Magma flow within dykes in submarine hyaloclastite environments: an AMS study of the Miocene Cabo de Gata volcanic units

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