Chronologie du magmatisme neogene des Cordilleres Betiques (Espagne meridionale)

Bellón, Hervé; Bordet, Pierre; Christian, Michel

doi:10.2113/gssgfbull.s7-xxv.2.205

Cited by 121 publications

(66 citation statements)

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“…Having in mind this model, it is important to note that the magmas generated in the SE Mediterranean margin of Spain include the following rock series: calc-alkaline, K-rich calc-alkaline, shoshonitic, ultrapotassic and alkaline basaltic (Lopez Ruiz and Rodriguez Badiola, 1980). Radiometric dating indicates two episodes of magmatic activity (Bellon et al, 1983). The first began in the Late-Burdigalian/Early- Langhian with the generation of the calc-alkaline rocks, continued with the simultaneous extrusion of the calc-alkaline, K-rich calc-alkaline and shoshonitic rocks, and ended in the Messinian with the emplacement of the ultrapotassic rocks.…”

Section: Volcanic and Tectonic Frameworkmentioning

confidence: 99%

The volcanism-related multistage hydrothermal system of El Jaroso (SE Spain): Implications for the exploration of Mars

et al. 2014

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The SE Mediterranean margin of Spain is an extremely interesting area of synchronous interaction of tectonic, volcanic, evaporitic and mineralizing hydrothermal processes. This works tackles the multiple relations among these processes by the study of a specific and representative case: the 'Jaroso Hydrothermal System'. The hydrothermal fluids were genetically linked with the late episodes of the Upper Miocene calc-alkaline and shoshonitic volcanism of the area. The ascent of the fluids was mainly controlled by the Palomares fault in Sierra Almagrera. In the shallow-marine basin of Las Herrerias, the movement of the acid solutions was controlled by both NNE-SSW and N150E normal faults and WNW-ESE wrench reverse faults. At least three mineralising stages were identified, although the particular formation of jarosite could be associated with both hypogenic and supergenic processes. We suggest that the multistage hydrothermal system of El Jaroso (Sierra Almagrera, Almería province, SE Spain), which is responsible for both the Jaroso ores (especially rich in jarosite) and the Las Herrerias sulfate-rich, shallowmarine laminites, could be exploited as a potential model with important implications for the exploration of Mars.

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Section: Volcanic and Tectonic Frameworkmentioning

confidence: 99%

The volcanism-related multistage hydrothermal system of El Jaroso (SE Spain): Implications for the exploration of Mars

et al. 2014

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“…It can also be followed southwards into the Alborán Sea. From a petrologic point of view, four types of volcanic rocks can be distinguished in the south-eastern Betic region: (1) calk-alkaline volcanics, (2) potassic calk-alkaline and shoshonitic volcanics, (3) lamproitic volcanics, and (4) basaltic-alkaline volcanics (Araña and Vegas, 1974;López Ruiz and Rodríguez Badiola, 1980;Bellon et al, 1983) Bellon et al (1983); (2) Nobel et al (1981); (3) Duggen et al (2005); (4) Kuiper et al (2006). PMAG: Paleomagnetic results obtained from paleomagnetic experiments (from Calvo et al, 1994Calvo et al, , 1997 1983; Nobel et al, 1981;Di Battistini et al, 1987;Duggen et al, 2004Duggen et al, , 2005Kuiper et al, 2006).…”

Section: Geological Setting and Samplingmentioning

confidence: 99%

A paleointensity study on middle Miocene to Pliocene volcanic rocks from south-eastern Spain

2009

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Thirteen middle-Miocene to Pliocene volcanic sites, belonging to four different types of volcanism (calcalkaline volcanism, potassic calc-alkaline and shoshonitic volcanism, lamproitic volcanism and basaltic alkaline volcanism), have been sampled in south-eastern Spain for paleointensity determinations. Rock-magnetic studies yield low-Ti titanomagnetite as the main carrier of remanence, showing also the presence of titanohematites in several cases. Analysis of hysteresis parameters indicates a PSD domain structure. Paleointensity determinations were performed with the Coe (1967) method. Of the 90 paleointensity determinations carried out, 29 provide successful determinations which fulfil selection criteria; most of these were in samples of lamproitic volcanism. Only four lamproitic sites out of the 13 studied ones yield reliable results. All have a similar age of approximately 7 M.y. Virtual dipole moments (VDM) of three of these display values between approximately 4·10 22 A m 2 and 8·10 22 A m 2 , thus providing new paleointensity data for a time interval (between 4 and 8 M.a.), with a lack of Thellier-type paleointensity determinations. The fourth site shows a much lower paleointensity of 1.6·10 22 A m 2 , and may correspond to a polarity transition, in accordance with its paleo-directional results.

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“…In core Al-42 (Fig. 2), intercalated among the Azagador sandstones, there are two dark levels that include dacite clasts (Mazarron group [3]) that we have interpreted as tuffite layers, thus calc-alkaline (Mazarron type) volcanics erupted during the deposition of the Azagador member in the Uppermost Tortonian. Several of the studied cores show that Abad marls corresponding to the transgressive systems tract on-lap straight upon the calc-alkaline volcanic rocks that outcrop in the Vera Basin.…”

Section: Sedimentary Units Of the Vera Basinmentioning

confidence: 94%

Uppermost Tortonian to Quaternary depocentre migration related with segmentation of the strike-slip Palomares Fault Zone, Vera Basin (SE Spain)

Booth‐Rea

Azañón

Garcı́a-Dueñas

et al. 2003

Comptes Rendus. Géoscience

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The Palomares Fault Zone (PFZ) is one of the main strike-slip brittle shear zones found in the Betics. It is segmented in several faults that have been active between the Upper Tortonian and present day. Data from drill cores in the Palomares area have permitted us to define the geometry and location of sedimentary depocentres related with the PFZ. These data show an eastward displacement between the Upper Tortonian to Messinian and the Pliocene-Quaternary sedimentary depocentres, towards the presently active Arteal fault, which bounds the western mountain front of Sierra Almagrera, showing that deformation along this fault zone has migrated towards the east, from the Palomares segment, with its main activity during the Upper Tortonian and Messinian, towards the Arteal fault, active during the Pliocene and Quaternary.

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Chronologie du magmatisme neogene des Cordilleres Betiques (Espagne meridionale)

Cited by 121 publications

References 0 publications

The volcanism-related multistage hydrothermal system of El Jaroso (SE Spain): Implications for the exploration of Mars

The volcanism-related multistage hydrothermal system of El Jaroso (SE Spain): Implications for the exploration of Mars

A paleointensity study on middle Miocene to Pliocene volcanic rocks from south-eastern Spain

Uppermost Tortonian to Quaternary depocentre migration related with segmentation of the strike-slip Palomares Fault Zone, Vera Basin (SE Spain)

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