A. Permanyer - Academia.edu (original) (raw)

Papers by A. Permanyer

Marine and Petroleum Geology, 2018

EL GRUP DE REPUBLICANS-NACIONALISTES PER IMPERATIUS POLITICS ES TRANSFORMA EN COLLABORADORS DEL R... more EL GRUP DE REPUBLICANS-NACIONALISTES PER IMPERATIUS POLITICS ES TRANSFORMA EN COLLABORADORS DEL REGIONALISME POLITIC PER LOGRAR LA INSTITUCIONALITZACIO DE CATALUNYA. EN AQUEST SUPOSIT LA BIOGRAFIA D ALBERT BASTARDAS I SAMPERE ES MODELICA COM ELEMENT D AQUEST GRUP.

AAPG Bulletin, 1988

ABSTRACT

Since 50th to 60th, and renewed lately, the Basque-Cantabrian Basin has been considered one of th... more Since 50th to 60th, and renewed lately, the Basque-Cantabrian Basin has been considered one of the most interesting areas for hydrocarbon exploration in Spain. This basin is characterized by numerous outcrops of tar sands related to fractures and Triassic diapirs (evaporites). And in the western part of the basin there is the only onshore oil field in Spain. The aims of this work are focused on the geochemical and mineralogical composition of the Upper Cretaceous exhumed reservoirs outcropping in the eastern part of the Basque-Cantabrian Basin (Álava province). Samples were examined by optical microscopy, cathodoluminiscence, SEM microscopy, microprobe and X-ray analyses. Hydrocarbons were studied by gas chromatography/mass spectrometry. The reservoirs consist of carbonate rocks and sandstones. The carbonate rocks are biosparites and biorudites with a diagenetic sequence of cements formed by pyrite, drusy and blocky calcite. The intergranular and intercrystalline porosity as well as...

Organic Geochemistry, 2014

ABSTRACT Recent studies have documented the expulsion of methane and oil to the Albian paleoseabe... more ABSTRACT Recent studies have documented the expulsion of methane and oil to the Albian paleoseabed in the Basque-Cantabrian Basin. They interpret that hydrocarbon generation and expulsion were triggered by seismically recorded magmatic intrusions which metamorphosed organic-rich host sediments. An outcrop within the basin was selected to investigate organic matter evolution and sediment degassing due to an igneous body. This intrusion is a 5 m thick Late Albian basaltic sill that intruded mudstones of the Black Flysch Group, near Gorliz (north Iberia). Vitrinite and bitumen reflectance profiles and metamorphic mineral distribution in the overburden indicate that the sill produced a thermal effect that increases toward the intrusion, defining a 2 m thick (minimum) contact aureole. Geochemical profiles of TOC, S1, S2, HI and PC show a gradual decrease toward the sill indicating organic carbon loss and increase in the thermal maturity of the organic matter in the same direction. Concordantly, gas chromatograms show a loss of n-alkanes and a predominance of the shorter chains length homologues adjacent to the sill. Tmax and TR (S1/ S1+ S2) values increase toward the sill which suggests an increase in the thermal stress and in the extent of kerogen pyrolysis, respectively. Organic carbon loss in the aureole was the result of carbon devolatilization and formation of CO2 and CH4 gases. The newly formed CO2 reacted with pore waters to precipitate 13C-depleted carbonate minerals in the aureole and in sill fractures. CH4 escaped from the aureole via hydrofractures to the paleoseabed, where methane-derived authigenic carbonates were formed.

This is the second issue of Geologica Acta dedicated to the memory of Professor Francesc Calvet, ... more This is the second issue of Geologica Acta dedicated to the memory of Professor Francesc Calvet, who passed away in January 2002. Francesc was a man with great human qualities, a distinguished scientist and an inspiring teacher who was held in high esteem by all those who knew him. The first volume contained six papers on specific areas of research in which Francesc was engaged, and a biography (Geologica Acta, volume 2, Nº 4, 2004). This second volume is made up of contributions by colleagues and former students who wish to salute Francesc Calvet as an outstanding geologist and teacher. The papers included in this volume are also subjects in which Francesc was closely involved.

Water, Air, & Soil Pollution, 2010

Page 1. Full-Scale Remediation of a Jet Fuel-Contaminated Soil: Assessment of Biodegradation, Vol... more Page 1. Full-Scale Remediation of a Jet Fuel-Contaminated Soil: Assessment of Biodegradation, Volatilization, and Bioavailability José Luis R. Gallego &amp;amp;amp;amp;amp; Carlos Sierra &amp;amp;amp;amp;amp; Albert Permanyer &amp;amp;amp;amp;amp; Ana I. Peláez &amp;amp;amp;amp;amp; Demelza Menéndez-Vega &amp;amp;amp;amp;amp; Jesús Sánchez ...

Geogaceta, 2006

The occurrence of or ganic-rich levels in the turbiditic sediments of the Vallfogona Fm (Cadí thr... more The occurrence of or ganic-rich levels in the turbiditic sediments of the Vallfogona Fm (Cadí thrust sheet) in the SouthEastern Pyrenees allowed us the determination of organic matter types, richness and oil potential, and highlighted the importance of organic matter sedimentation in turbiditic environments. Two types of samples were differentiated based on or ganic geochemistr y and organic petrography. Type A samples were deposited in a carbonated environment (even/odd n-alkanes predominance and Pr/Ph<1), under hypersaline conditions (presence of gammacerane, Ts/Tm >1). Type B samples suggest a more shaly marine environment, which is corroborated by the predominance of odd n-alkanes, Pr/Phe»1, Ts/Tm<1, the absence of gammacerane and the similar content of the C 27 and C 29. Therefore, turbidite facies can be regarded as an environment where or ganic sedimentation occurs although with heterogeneities in type and amount of organic matter. Thus, in turbidite systems reser voir and source could exist simultaneously.

Geologica Acta, 2007

The Napo Formation of Lower-Middle Cretaceous age in the Oriente basin, Ecuador, is an important ... more The Napo Formation of Lower-Middle Cretaceous age in the Oriente basin, Ecuador, is an important sandstone reservoir. The formation is buried at a depth of 1,500 m in the eastern part of the basin and down to 3,100 m in the western part. The sandstones display higher porosity values (av. 20%) than other reservoirs in the region. These sandstones were deposited in fluvial, transitional and marine environments, and they are fine to medium grained quartzarenites and subarkoses. The principal cements are carbonates, quartz overgrowth and kaolin, with scarce amounts of pyrite-pyrrhotite and chlorite. Carbonate cements include: Eogenetic siderite (S1), mesogenetic and post-compactional calcite, Fe-dolomite, ankerite and siderite (S2). Early siderite and chlorite helped to retain porosity by supporting the sandstone framework against compaction. Dissolution of feldspars and carbonate cements are the main mechanism for secondary porosity development during mesodiagenesis. The high intergran...

The Taoudeni rift Basin of the West African craton contains organic-rich levels Neoproterozoic in... more The Taoudeni rift Basin of the West African craton contains organic-rich levels Neoproterozoic in age (1100-650 My). In the basin margins the reservoirs are made up by carbonate stromatolitic reefs, nowadays dolomitized. These reservoirs contain bitumen and pyrobitumen. The main objective of this work is to establish relationships between the pyrobitumen present in the inter-crystalline porosity, the dolomitization process and the thermal evolution related to a hydrothermal process.

54th EAEG Meeting, 1992

A reconnaissance program of geophysical surveying was conducted during 1990 to evaluate the appli... more A reconnaissance program of geophysical surveying was conducted during 1990 to evaluate the application of ground probing radar for characterization of subsurface foundation disturbances associated with historical buildings. The study combines geophysical surveys and historic-archaeological investigations. The results obtained are then compared with standard geological engineering evaluation tests.