José F. Barrenechea

José F. Barrenechea
Complutense University of Madrid | UCM · Department of Mineralogy and Crystallography

About

101
Publications
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1,880
Citations
Citations since 2016
22 Research Items
1030 Citations
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200

Publications

Publications (101)
Book
Full-text available
Until very recently, the early Alpine Permian-Triassic tectono-sedimentary phases preserved in the Cantabrian Mountains have suffered from important stratigraphic mismatches and wrong tectonics interpretations. The lack of precise ages and misunderstanding of the stratigraphical units were the main causes behind these problems. In consequence, the...
Article
Full-text available
The scarce evidence of paleontological records between the upper Permian and the Anisian (Middle Triassic) of Western Europe could reflect (1) large stratigraphic gaps in the continental successions and/or (2) the persistence of disturbed conditions after the Permian–Triassic Boundary extinction event and the succession of ecological crises that oc...
Conference Paper
Full-text available
Several siltstone/claystone levels of the Permian succession in the Southern Pyrenees were sampled for a detailed palynostratigraphic study. A new well preserved palynological assemblage was obtained from this succession, which stands out because of its red continental deposits interlayered by volcanic rocks radiometrically dated (281.5 ±2.3 Ma and...
Chapter
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The Permian-Triassic rifting represents the first of the two Mesozoic rifting stages recorded in the Iberian Peninsula. Its first phases of development started during the Early Permian, and were linked to the beginning of the break-up of Pangea, the large, unique and rheologically unstable supercontinent that mainly resulted from the collision of G...
Article
In recent years there is growing evidence of the importance of the Smithian-Spathian (Early Triassic) ecological crisis to explain the delayed recovery of life after the Permian-Triassic Boundary mass extinction. This study focuses on sedimentary continental rocks of middle Permian to Middle Triassic age from four different Peritethys basins in sub...
Article
In their paper, Mujal et al. (2017) describe as exceptional a section in the E Pyrenees (namely the Coll de Terrers), considering it a continental succession that continuously spans in time from the Late Permian to the Early Triassic. These authors describe the sandy-clayey red-beds of the upper Buntsandstein unit as the upper part of the Upper Red...
Article
In the western European basins, the paleoflora of late Pennsylvanian-early Permian transition is still a matter of discussion in terms of its age determination and biostratigraphic ranges. This study represents a review of the Upper Carboniferous and Permian stratigraphy of the Central and Eastern Pyrenees from continental successions with interbed...
Article
The Pyrenean-Cantabrian Orogen arose through the collision of the Iberian and Eurasian plates, mostly in Cenozoic times. This orogen comprises two main mountain ranges, the Pyrenees to the east, and the Cantabrian Mountains to the west. To date, the early Alpine tectono-sedimentary phases preserved in the Cantabrian Mountains, of Permian and Triass...
Article
The break-up of Pangea remains one of the most interesting moments in the Earth's history. In the Pyrenees this geological moment is represented by continental successions, giving rise to a magnificent example of the creation of new basins and their sedimentary fill. In this work we present a study based on stratigraphy, sedimentology and synsedime...
Article
This study examines rainfall variations of the Mid-Carnian Pluvial Episode (CPE) based on the continental fluvial sedimentology, palaeosol and clay mineralogy records of the Stable Meseta (eastern Spain). In the formation examined, the Manuel Fm or K2 Fm, the CPE is represented by three regressive–transgressive sequences, or subunits K2.1, K2.2 and...
Conference Paper
Full-text available
The Upper Carboniferous–early Permian stratigraphic succession of the Pyrenees is represented by the volcanic-volcanoclastic deposits of the Grey Unit (GU), followed by the fluvial and lacustrine deposits of the Transition Unit and the Lower Red Unit (Gisbert, 1981). The present work shows new palynological data from the GU. The GU is defined prima...
Article
The Triassic record in the SE Iberian Ranges starts with two tecto-sedimentary units of continental origin in Buntsandstein facies: and Cañizar and Eslida Formations. The Eslida Formation consists of sandstone bodies intercalated with thick, red siltstone beds. Where this unit is presented, it lies always conformably layers on top of the Cañizar Fo...
Conference Paper
Full-text available
The late Palaeozoic-early Mesozoic stratigraphic succession of the Central Pyrenees provides the opportunity to study the evolution of sedimentary and volcano-sedimentary units deposited in a series of intracontinental basins. The genesis of these basins starts with a permo-carboniferous post-collisional, strike-slip tectonics, followed by an Early...
Conference Paper
Full-text available
The late Carboniferous-Lower Triassic basins of the Central-eastern Pyrenees are the result of the post-orogenic transtension and extension after the Variscan orogeny. Several intramontane continental troughs formed in SW Europe following the Upper Carboniferous-Lower Permian crustal-scale dextral shearing. In this geodynamic scenario, a strong tec...
Article
Full-text available
The Sierra of Ayllon in Central Spain has a rich heritage from both the architectonic and geological perspectives. On one hand, the low lands flanking the northern side of the sierra in the Segovia Province host the so-called red hamlets and black hamlets (pueblos rojos-pueblos negros). The red and black terms derive from the traditional local buil...
Article
The Sierra of Ayllón in Central Spain has a rich heritage from both the architectonic and geological perspectives. On one hand, the low lands flanking the northern side of the sierra in the Segovia Province host the so-called red hamlets and black hamlets (pueblos rojos-pueblos negros). The red and black terms derive from the traditional local buil...
Article
Full-text available
The Permian and Triassic successions of the Catalan Pyrenees provide key information on the stratigraphic and paleontological record of Southern Europe. These deposits are encompassed in a long terrestrial succession ranging from the Late Carboniferous to the Middle Triassic, having been historically studied by different disciplines (e.g., Mey et a...
Conference Paper
Full-text available
After some pioneering studies during the sixties and eighties of the last century, a few researches have been carried out on the continental Permian to Triassic sedimentary successions of central Pyrenees since the very recent and detailed insights of Gretter et al. (2015) and Mujal et al. (2016). In the frame of these last works, our aim is to cla...
Article
Full-text available
The continental Permian-Triassic transition in southern Europe presents little paleontological evidence of the Permian mass extinction and the subsequent faunal recovery during the early stages of the Triassic. New stratigraphic, sedimentological and paleontological analyses from Middle-Upper Permian to Lower-Middle Triassic deposits of the Catalan...
Article
Full-text available
In this paper, a method based on element mapping of randomly selected areas of thin sections on electron microprobe is proposed to quantify the relative contents of strontium-rich hydrated aluminium phosphate-sulphate (APS) minerals in siliciclastic continental sedimentary rocks. The main problems for these minerals to be quantified are related to...
Article
Full-text available
Devonian marbles within the internal aureole of the Panticosa Pluton contain good examples of vesuvianite that were overlooked. The pluton emplacement provoked recrystallization of the regional low-grade organic matter-bearing limestones and the formation of skarnoids at the expenses of interbedded siliclastic layers. The latter contain large cryst...
Article
Full-text available
Until recently the climate of the Early–Middle Triassic at low latitudes was broadly considered as generally temperate-warm with no major climate oscillations. This work examines the climate of this period through a detailed study of the sedimentary, plant, soil and mineral records of continental rocks (Buntsandstein facies) in eastern Iberian basi...
Article
The Eastern Catalan Pyrenees form the southernmost segment of the Pyrenean Axial Zone. They experienced complex multistage process as the result of both the Variscan and the Pyrenean orogenic cycles. After the Late Palaeozoic, several small extensional sub-basins were filled by continental successions as a response to the changing tectonic setting...
Conference Paper
Full-text available
Quantitative phase analysis (QPA) of clayey materials using X-Ray diffraction data has always been a challenge. While quantitative methods based on Rietveld analysis offer excellent results for non-clay minerals, they become problematic when high crystallochemical and order degree variations are present in the phases, as is the case of most clay mi...
Article
The end of the Permian period is characterized by the largest mass extinction ever recorded in marine and terrestrial sedimentary rocks. The oldest plant macro-remains after the P–T boundary recorded in the Castilian Branch of the Iberian Range after this mass extinction belong to the Eslida Formation of Anisian age. These associations have been re...
Conference Paper
Full-text available
The mantle is the largest reservoir of carbon on Earth. The mantle provides CO2 to the surface through degassing and magmatism whereas carbon from sediments (as carbonaceous matter) and altered oceanic crust (mostly as calcite veinlets) can be recycled into the mantle through subduction. This idealized cycle can be disrupted as a consequence of the...
Conference Paper
The Upper Carboniferous–Early Triassic stratigraphic succession of Catalan Pyrenees consists of volcano-sedimentary Units that deposited in intracontinental sub-basins. The genesis of these troughs, starts with a post-collisional, strike-slip tectonic, followed by a Permian extensional setting with fluvial and lacustrine facies accompanied by exten...
Chapter
Full-text available
The Early Triassic was still marked by the general perturbations related to the drastic palaeoenvironmental changes that occurred around the Permian–Triassic transition. These perturbations affected both marine and continental environments and were caused by events such as massive volcanism from the Siberian Traps and the consequent general geochem...
Article
Graphite deposits result from the metamorphism of sedimentary rocks rich in carbonaceous matter or from precipitation from carbon-bearing fluids (or melts). The latter process forms vein deposits which are structurally controlled and usually occur in granulites or igneous rocks. The origin of carbon, the mechanisms of transport, and the factors con...
Article
The Early–Middle Triassic siliciclastic deposits of the Catalan Ranges, NE Spain, are dominated by aeolian sediments indicating a predominance of arid climate during this time span, in sharp contrast with the coeval fluvial sediments found in the Castilian Branch of the Iberian Ranges, 300 km to the SW. The NE–SW-oriented Catalan Basin evolved duri...
Article
The presence of Sr-rich aluminium-phosphate sulphate (APS) minerals in continental sedimentary rocks from the Cañizar and Eslida Formations along the eastern part of the Iberian Range (Spain) is considered as evidence of acidic and oxidising conditions during Early–Middle Triassic times. The formation of APS minerals occurred shortly after sediment...
Article
Full-text available
Aluminum-phosphate-sulfate (APS) minerals, formed during early diagenesis in relation to acid meteoric waters, are the main host of Sr and S in the Early-Middle Triassic continental sandstones of the Iberian Ranges (east of the Iberian Peninsula). The sources of these elements and the effects of paleoenvironmetal changes on these sources and on the...
Article
Full-text available
A multiple basic to intermediate sill is reported for the first time in the south-eastern Iberian Ranges. It is composed of several tabular to irregular levels intercalated within the fl uvial sediments of the Alcotas Formation (Middle-Upper Permian). The sill could represent the youngest Paleozoic subvolcanic intrusion in the Iberian Ranges. The i...
Article
The Middle and Late Permian are characterized by a pair of mass-extinction events that are recorded in both marine and continental environments. Here, we present the first continental western peri-Tethyan record of an extinction event located in the Middle–Late interval. In the SE Iberian Ranges, Central Spain, the transition between the Lower and...
Article
Massive graphite deposition resulting in volumetrically large occurrences in volcanic environments is usually hindered by the low carbon contents of magmas and by the degassing processes occurring during and after magma emplacement. In spite of this, two graphite deposits are known worldwide associated with volcanic settings, at Borrowdale, UK, and...
Article
Full-text available
Graphite in the Borrowdale (Cumbria, UK) deposit occurs as large masses within mineralized pipe-like bodies, in late graphite–chlorite veins, and disseminated through the volcanic host rocks. This occurrence shows the greatest variety of crystalline graphite morphologies recognized to date from a single deposit. These morphologies described herein...
Article
Full-text available
The Permian–Triassic transition (P–T) was marked by important geochemical perturbations and the largest known life crisis. Consequences of this event, as oxygen-depleted conditions and the unusual behavior of the carbon cycle, were prolonged during the Early Triassic interval delaying the recovery of life in both terrestrial and marine ecosystems....
Article
Full-text available
The provenance of the Permo-Triassic series of the Talayuelas anticline (Iberian Ranges) have been studied using U-Pb geochronology (laser ablation inductively coupled plasma mass spectrometry) of detrital zircons. These intracontinental siliciclastic series were formed by extensive sandy braided fluvial systems associated with ephemeral lake depos...
Article
Full-text available
Stable carbon isotope geochemistry provides important information for the recognition of fundamental isotope exchange processes related to the movement of carbon in the lithosphere and permits the elaboration of models for the global carbon cycle. Carbon isotope ratios in fluid-deposited graphite are powerful tools for unravelling the ultimate orig...
Article
A multiple basic to intermediate sill is reported for the first time in the south-eastern Iberian Ranges. It is composed of several tabular to irregular levels intercalated within the fluvial sediments of the Alcotas Formation (Middle-Upper Permian). The sill could represent the youngest Paleozoic subvolcanic intrusion in the Iberian Ranges. The ig...
Article
The microstructure and mineralogy of lightweight aggregates manufactured with washing aggregate sludge, sewage sludge and a clay-rich sediment have been studied. The mineralogical analysis revealed the neo-formation of plagioclase and pyroxene group minerals and a minor presence of gehlenite. Some relationships may be established: (i) heating tempe...
Chapter
The Permian and Triassic rocks of the Iberian Range are in general well exposed. Most of these outcrops are related to anticlines resulting from Cenozoic compresional events, and clearly inherit the ancient fault lineaments that controlled their sedimentation in the Iberian Basin. These rocks show specific characteristics related to the asymmetrica...
Article
This work is focused on carbonate paleosols developed in three stratigraphic sections (Landete, Talayuelas and Henarejos) of the Middle–Late Permian Alcotas Formation in the SE Iberian Basin. The Alcotas Formation, of alluvial origin, was deposited in semi-connected half-grabens developed during the early stages of the Permian–Triassic rifting stag...
Article
A multiple basic to intermediate sill is reported for the first time in the south-eastern Iberian Ranges. It is composed of several tabular to irregular levels intercalated within the fl uvial sediments of the Alcotas Formation (Middle-Upper Permian). The sill could represent the youngest Paleozoic subvolcanic intrusion in the Iberian Ranges. The i...
Article
The microstructures and mineralogical compositions of lightweight aggregates (LWAs) manufactured with washing aggregate sludge (WS), fly ash (FA) and used motor oil (UMO) have been studied. Most LWAs with WS and FA exhibited an external layer and a glassy core with isolated pores. LWAs with WS and UMO did not present external shells or signs of blo...
Article
Permian and Triassic alluvial sediments of the Iberian Range, an intracratonic, linear alpine structure occupying central and eastern Spain, were deposited in the fault-bounded Iberian Basin during an extensional period. The earliest sedimentary infill consists of alluvial deposits subdivided into three unconformity-bounded macrosequences. The seco...
Article
The volcanic-hosted graphite deposit at Borrowdale in Cumbria, UK, was formed through precipitation from C–O–H fluids. The δ13C data indicate that carbon was incorporated into the mineralizing fluids by assimilation of carbonaceous metapelites of the Skiddaw Group by andesite magmas of the Borrowdale Volcanic Group. The graphite mineralization occu...
Article
The Iberian Basin or its present-day expression, the Iberian Ranges, was refilled with red bed sediments of alluvial origin during the late Olenekian–Anisian period represented by the Cañizar (Olenekian–Anisian) and Eslida (Anisian) Formations, both commonly known as Buntsandstein facies. In the late part of the Anisian, the Tethys Sea reached the...
Article
Full-text available
En este trabajo se describen las experiencias llevadas a cabo en la utilización de medios digitales en cartografía geológica con los alumnos de la Facultad de CC. Geológicas. Los trabajos realizados, con financiación parcial del proyecto de innovación (PINMAD-86, 2007), han permitido poner a disposición de los alumnos algunos de los medios digitale...
Article
Recognized large occurrences of fluid-deposited graphite displaying high crystallinity were previously restricted to high-temperature environments (mainly granulite facies terranes). However, in the extensively mined Borrowdale deposit (UK), the mineralogical assemblage, notably the graphite-epidote intergrowths, shows that fully ordered graphite p...
Article
Full-text available
The species rubra sp. nov., a new triadotypomorphan insect from the Iberian Ranges, is described on the basis of a newly discovered specimen, found in fine grained sandstones of alluvial origin, in the lowermost part of the Eslida Formation (Buntsandstein facies), in the central part of the Iberian Ranges. The occurrence of a triadotypomorphan sugg...