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CHARACTERISTICS OF A Mg-PALYGORSKITE IN MIOCENE ROCKS,MADRID BASIN (SPAIN)
Esquivias FTIR Spectroscopy Mg-palygorskite Octahedral Occupancy Palygorskite
2011/11/7
Palygorskite in Miocene mudstones, palustrine limestones and calcretes from the Esquivias locality (Madrid Basin, Spain) has been analyzed by X-ray diffraction, infrared spectroscopy, scanning electro...
Helium isotopic ratios in fluid inclusions from fluorite-rich Mississippi Valley-Type district of Asturias, northern Spain
fluorite noble gases helium isotopes fluid inclusions Asturias, MVT deposits
2017/8/9
Helium isotopes have been measured in fluorite and sulphides from fluorite-rich Mississippi Valley-type (MVT) deposits from Asturias, Spain, in order to assess the involvement of mantle and crust-deri...
New data on chondrichthyan microremains from the Givetian of the Renanue section in the Aragonian Pyrenees (Spain)
Chondrichthyans Taxonomy Devonian Givetian Pyrenees
2009/10/20
The continued investigations on the Middle Devonian part (Givetian, Middle through Upper Polygnathus varcus conodont Zones) of the section near the Renanué village in the Aragonian Pyrenees, Spain, br...
Constraints on the evolutionary history of aluminous mafic rocks in the Ronda peridotite massif (Spain) from trace-element compositions of clinopyroxene and garnet
trace-element clinopyroxene garnet eclogite Ronda granulite
2017/8/9
Multiple trace-element compositions of clinopyroxene and garnet in aluminous mafic layers (±corundum and/or sapphirine) alternating with peridotites from the Ronda massif, Spain, were determined by an...
The significance of microgranular enclaves in assessing the magmatic evolution of a high-level composite batholith: A case on the Los Pedroches Batholith, Iberian Massif, Spain
microgranular enclave granodiorite monzogranite Los Pedroches batholith Iberian Massif
2017/8/10
To evaluate the origin and significance of microgranular enclaves hosted by granites, we present new data on two granitoid series belonging to the Los Pedroches Batholith (LPB), SW Iberian Massif, Spa...
Searching and detecting earthquake geochemical precursors in CO2-rich groundwaters from Galicia, Spain
geochemical earthquakes precursors Galicia Spain
2017/8/10
The northwestern region of the Iberian Peninsula was traditionally considered a seismically stable area. However, the 1995 and 1997 Galicia earthquakes of magnitude 4.6 and 5.3 produced significant da...
Lacustrine chalky carbonates: origin, physical properties and diagenesis (Palaeogene of the Madrid Basin, Spain)
Chalky carbonates Lacustrine deposits Physical properties Overpressure Palygorskite Palaeogene
2011/11/8
The Palaeogene lacustrine chalky carbonates of the Madrid Basin are a peculiar type of very soft and friable carbonate facies with high porosity despite being covered by more than 800 m of sediment. S...
Microtextures and the Origin of Muscovite-Kaolinite Intergrowths in Sandstones of the Utrillas Formation, Basque Cantabrian Basin, Spain
Epitactic Geomechanical Parameters HRTEM Muscovite-kaolinite Intergrowth SEM Timing
2011/12/5
Abstract: Muscovite-kaolinite intergrowths found in Albian sandstones of the Basque Cantabrian basin (northern Spain) were studied by optical, scanning and electron microscopy and electron microprobe ...
Dolomitization and silicification in low-energy lacustrine carbonates (Paleogene, Madrid Basin, Spain)
Shallow lacustrine carbonates Chalks Dolomitization Cherts Paleogene Madrid Basin
2011/11/14
Repetitive sequences of carbonate deposits, occurrence include in the lower part of the Paleogene Carbonate Unit (northeast border of the Madrid Basin), have been studied, defining regressive lacustri...
Transmission Electron Microscopy Study of Illitization in Pelites from the Iberian Range, Spain: Layer-by-Layer Replacement?
Analytical Electron Microscopy I-S Illite Illitization Process Polytypism Prograde Diagenesis Scanning Electron Microscopy Transmission Electron Microscopy
2011/12/6
Abstract: A sequence of interstratified illite-smectite (I-S) and illite in Paleozoic pelites and metapelites from the Iberian Range, Spain, was studied by X-ray diffraction (XRD), scanning electron m...
Mg-Rich Smectite “Precursor” Phase in the Tagus Basin, Spain
Precursor Clay Smectite Stevensite Tagus Basin (Spain) Incipient Crystallization
2011/12/6
Abstract: The pink clays from the Tagus basin, Spain, were characterized by X-ray difraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), and transmission electron microscopy...
Transmission Electron Microscopy Study of Very Low-Grade Metamorphic Rocks in Cambrian Sandstones and Shales, Ossa-Morena Zone, Southwest Spain
AEM Anchizone Chloritic Phases Clastic Rocks Mica Polytypes Variscan Belt
2011/12/5
Abstract: This study examines the evolution of the texture, structure, and chemical composition of rocks derived from clastic materials of the Ossa-Morena Zone (Hesperian Massif, Spain). Previous stud...
Chlorite, Corrensite, and Chlorite-Mica in Late Jurassic Fluvio-Lacustrine Sediments of the Cameros Basin of Northeastern Spain
Cameros Basin Chlorite Chlorite-Mica Corrensite EMPA Low-Grade Metamorphism Sedimentary Facies Spain XRD
2011/12/6
Abstract: The distribution and crystal-chemical characteristics of chlorite, corrensite, and mica in samples from a stratigraphic profile in the Cameros basin are controlled by changes in the sediment...
Chemistry and genetic implications of tourmaline and Li-F-Cs micas from the Valdeflores area (Cáceres, Spain)
Valdeflores area tourmaline-rich rocks Li-F-Cs
2012/3/30
Pervasivemetasomatismthatinvolvedtheformationoftourmaline-richrocksandin?ux
ofLi,F,andCsintoOrdovicianpsammo-peliticmetasedimentsoccurredintheValde?ores
area(Ca!ceres,Spain).NumerousLi-andSn-bearing...
Randomly Interstratified Kaolinite-Smectite from Galicia (NW Spain): A New Procedure for Determination
Acid Soil Gabbro Interstratified Kaolinite-Smectite Paleohorizons
2011/12/9
Abstract: A new protocol was developed to examine an assemblage of kaolinite-smectite in a buried horizon of a paleosol developed on gabbro parent material. The new extraction procedure appears suitab...