Cretaceous

Martı́n-Chivelet, Javier

doi:10.1144/gospp.12

Cited by 56 publications

(35 citation statements)

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“…The geodynamic context of the margin during the early Cretaceous was controlled by extensional tectonics, resulting in the creation of tilted blocks with differential subsidence rates . Starved areas developed mainly in the subsident, shallower parts of the tilted blocks (Martín-Chivelet et al 2002;Vera et al 2004), which record condensed sedimentation or hiatuses. During the late Valanginian through the Hauterivian, a general transgressive phase took place ) with the accumulation of terrigenous sediments in proximal sectors of the Prebetic (External Prebetic sub-domain) and hemipelagic sedimentation in distal areas (Internal Prebetic) .…”

Section: Geological Settingmentioning

confidence: 99%

K‐feldspar alteration to gel material and crystallization of glauconitic peloids with berthierine in Cretaceous marine sediments—sedimentary implications (Prebetic Zone, Betic Cordillera, SE Spain)

Jiménez-Millán

Jiménez

2007

Geological Journal

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Glauconitic peloids from a Hauterivian condensed level in a hemipelagic unit of the Internal Prebetic (Los Villares Formation, eastern Betic Cordillera) have been studied by X-ray diffraction (XRD), optical microscopy, scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) and analytical electron microscopy (AEM). The sediments forming the condensed level are characterized by abundant spherical to ovoid green glauconite peloids with radial cracks. Quartz, feldspar and muscovite are also abundant, whereas calcium phosphate is rarely detected. XRD analysis of the peloids reveals glauconite and small amounts of berthierine. SEM and HRTEM data show feldspar dissolution features, a Si-Al-rich gel-like substance filling K-feldspar micropores and interlayering of well-crystallized glauconite and berthierine packets. The last stage of the glauconitization process resulted in conversion of the smectitic precursor. Sedimentary and mineralogical features indicate an autochthonous origin for the glauconite. The depositional environment was a distal, hemipelagic ramp on the Southern Iberian Continental Palaeomargin. Low sedimentation rates lead to sediment condensation in a general transgressive context. The margin was affected by extensional tectonics, creating tilted blocks, resulting in lateral facies changes. The dissolution of K-feldspars probably occurred after their deposition in the marine environment but predating the glauconitization. An influx of meteoric water is therefore required, probably related to subsurface fluxes from adjacent emergent areas (the higher parts of tilted blocks).

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Section: Geological Settingmentioning

confidence: 99%

K‐feldspar alteration to gel material and crystallization of glauconitic peloids with berthierine in Cretaceous marine sediments—sedimentary implications (Prebetic Zone, Betic Cordillera, SE Spain)

Jiménez-Millán

Jiménez

2007

Geological Journal

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“…Salas & Casas 1993;Capote et al 2002;Martín-Chivelet et al 2002). The orientation of the main Variscan and Mesozoic extensional structures (NW-SE and NE-SW) partially conditioned the main trend of the Alpine compressive structures (Liesa et al 1996, predominantly oriented WNW-ESE to NW-SE.…”

mentioning

confidence: 99%

“…Ziegler 1989;Olivet 1996;Mas & García 2004). During the same period, the opening of the Tethys Ocean resulted in the destruction of the carbonate Jurassic platform in the eastern Iberian basin (Martín-Chivelet et al 2002). These extensional events have been related to the development of the different branches of an RRR (ridgeridge-ridge) triple junction located in the westernmost limit of the Tethys, and the Iberian basin is considered to represent the aulacogen branch of this triple junction (Álvaro et al 1979).…”

mentioning

confidence: 99%

“…They consist of heterogeneous materials including red beds of different grain sizes (Canérot 1974). Marine conditions prevailed again during the rest of the Aptian, producing the widespread deposition of up to 1100 m of shallow-water carbonate platform sediments (Martín-Chivelet et al 2002;Mas & García 2004). Lower and Middle Albian rocks are represented by up to 500 m of tidal-influenced deltaic sediments with coal layers (Escucha Fm, Querol et al 1992).…”

mentioning

confidence: 99%

“…These sediments define the end of the rifting and the beginning of the following post-rift thermal subsidence, associated with the deposition of marine platform sediments throughout the Iberian domain (e.g. Alonso et al 1993;Martín-Chivelet et al 2002;Mas & García 2004;Rodríguez-López et al 2006).…”

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confidence: 99%

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Tethyan versus Iberian extension during the Cretaceous period in the eastern Iberian Peninsula: insights from magnetic fabrics

García‐Lasanta

Román‐Berdiel

Oliva‐Urcia

et al. 2015

JGS

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This work investigates how anisotropy of magnetic susceptibility (AMS) recorded the strain related to the Early Cretaceous extensional processes in synrift sediments of the Maestrat basin (eastern Spain). Forty-two sites, distributed throughout the Lower Cretaceous sequence with dominant gentle dips, were sampled. Minerals contributing to the AMS are mainly phyllosilicates. The parallelism between magnetic and sedimentary foliation seems to indicate that a primary (synsedimentary and early diagenetic) magnetic fabric was preserved at 84% of sites. Consequently, preferred orientations of magnetic lineations are interpreted to record the effect of extensional processes coeval with sedimentation and diagenesis during this period. At these 35 sites, two main magnetic lineation orientations are found, delimiting two large domains: a NE-SW orientation prevailing in the NW sector of the basin (parallel to the extension direction of the Iberian basin), and NW-SE to NNW-SSE orientations to the SE (parallel to the extension direction controlling the western Tethys margin). Directional variability demonstrates that the Maestrat basin is located at the boundary between two domains (Iberian and Tethyan) undergoing different plate-scale extensional processes. The subsequent Cenozoic tectonic inversion affected the synsedimentary magnetic fabrics at only a few sites at the borders of the basin, where compressive features are more developed. Received

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Structures and geometries of the Tajo Basin crust, Spain: Results of a magnetotelluric investigation compared to seismic and thermal models

2014

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The Tajo Basin and Betic Mountain Chain in the south central region of the Iberian Peninsula were chosen for investigation in the first phase of the magnetotelluric (MT) component of the PICASSO (Program to Investigate the Convective Alboran Sea System Overturn) project. The MT results provide information about the electrical conductivity distribution in previously unprobed subsurface regions, as well as complimenting and enhancing results of prior geological and geophysical investigations thereby enabling the definition of a petrological subsurface model and a comprehensive understanding about the tectonic setting. Two‐dimensional (2‐D) inversion of the MT data provides enhanced insight into Iberian subsurface geology in the crust. The most striking features of the final model are (i) a distinct vertical interface within the Variscan basement beneath the center of the Tajo Basin that is spatially associated with the boundary between regions with and without substantial Alpine deformation, and (ii) a middle to lower crustal conductive anomaly that can be related to remnants of asthenospheric intrusion in connection with Pliocene volcanic events in the Calatrava Volcanic Province. For the latter, effects of hydrous phases are inferred that may originate from dehydration processes within the subducting slab beneath Alboran Domain and Betic Mountain Chain.

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Cretaceous

Cited by 56 publications

References 0 publications

K‐feldspar alteration to gel material and crystallization of glauconitic peloids with berthierine in Cretaceous marine sediments—sedimentary implications (Prebetic Zone, Betic Cordillera, SE Spain)

K‐feldspar alteration to gel material and crystallization of glauconitic peloids with berthierine in Cretaceous marine sediments—sedimentary implications (Prebetic Zone, Betic Cordillera, SE Spain)

Tethyan versus Iberian extension during the Cretaceous period in the eastern Iberian Peninsula: insights from magnetic fabrics

Structures and geometries of the Tajo Basin crust, Spain: Results of a magnetotelluric investigation compared to seismic and thermal models

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