Environmental control on the petrological characteristics of fluvial sandstones- A Triassic example. / Henares, Saturnina; Viseras, César; Fernández Martínez, Juan; Pla Pueyo, Sila; Cultrone, Giuseppe.

2011. 86 Abstract from 28th IAS Meeting of Sedimentology, Zaragoza, Spain.

Research output: Contribution to conferenceAbstract

Published

Standard

Environmental control on the petrological characteristics of fluvial sandstones- A Triassic example. / Henares, Saturnina; Viseras, César; Fernández Martínez, Juan; Pla Pueyo, Sila; Cultrone, Giuseppe.

2011. 86 Abstract from 28th IAS Meeting of Sedimentology, Zaragoza, Spain.

Research output: Contribution to conferenceAbstract

Harvard

Henares, S, Viseras, C, Fernández Martínez, J, Pla Pueyo, S & Cultrone, G 2011, 'Environmental control on the petrological characteristics of fluvial sandstones- A Triassic example.', 28th IAS Meeting of Sedimentology, Zaragoza, Spain, 5/07/11 - 8/07/11 pp. 86. <http://www.sedregroup.com/>

APA

Henares, S., Viseras, C., Fernández Martínez, J., Pla Pueyo, S., & Cultrone, G. (2011). Environmental control on the petrological characteristics of fluvial sandstones- A Triassic example.. 86. Abstract from 28th IAS Meeting of Sedimentology, Zaragoza, Spain. http://www.sedregroup.com/

Vancouver

Henares S, Viseras C, Fernández Martínez J, Pla Pueyo S, Cultrone G. Environmental control on the petrological characteristics of fluvial sandstones- A Triassic example.. 2011. Abstract from 28th IAS Meeting of Sedimentology, Zaragoza, Spain.

Author

Henares, Saturnina ; Viseras, César ; Fernández Martínez, Juan ; Pla Pueyo, Sila ; Cultrone, Giuseppe. / Environmental control on the petrological characteristics of fluvial sandstones- A Triassic example. Abstract from 28th IAS Meeting of Sedimentology, Zaragoza, Spain.1 p.

BibTeX

@conference{38c3b3ba1f114690a02a79c08e677698,
title = "Environmental control on the petrological characteristics of fluvial sandstones- A Triassic example.",
abstract = "The Triassic red beds successions that crop out in the Tabular Cover of the Iberian Meseta, SE Spain(TIBEM), are an excellent example of sandstone bodies deposited in different environmental contexts,particularly those of braidplain, channel fill (meandering, straight, braided and anastomosed) and overbank(crevasse splay lobes and sheet floods). In all cases, the sandstone bodies are laterally and vertically well sealedby overbank fines, and resemble the productive beds of the TAGI (Algeria). However, a preliminary petrologicalstudy and a first approach to the characteristics of the porous system, using optical microscopy and mercuryinjection porosimetry techniques, have revealed the main microscale differences between these types ofdeposits.The primary mineralogy is dominated, in all cases, by quartz and potassium feldspar, with minor amounts ofplagioclase. Grain-coating Fe oxides (hematite), clays (illite, kaolinite and chlorite), mica (biotite), tourmaline andother opaque detrital minerals have been identified as accessory minerals. Kaolinite and sericite are also presentas alteration products of feldspars. These data allow to classify the deposits as arkosic-subarkosic arenites.The microtexture of the studied samples is characterized by well sorted grains, with quite spherical, subangularto subrounded morphology. The grain size varies from fine to medium (125 to 200 'm), being finer in overbankand channel fill deposits than in the braidplain ones. The fabric is mostly grain-supported, with preferredorientation of grains particularly evident in overbank and channel fill deposits.In the sampled braidplain sediments, the low mechanically infiltrated clay content and the grade ofcementation stand out. In this group the materials with the highest values of primary porosity (more than 25%),as well as with the largest pore radius are included, showing an unimodal distribution of sizes at around 30 'm.In the overbank and channel fill deposits, the occurrence of carbonate, silica and/or gypsum cements and thepresence of intersticial clay considerably reduces the primary porosity (less than 17%). Moreover, the poreradius tends to be lesser with a bimodal distribution of sizes at around 1 and 0.1 'm.This preliminary study reveals that the environmental context directly affects the petrological characteristicsand the petrophysical properties, which in turn control other features of the deposits such as their potential asreservoir rocks.",
keywords = "SANDSTONE, Triassic, petrology, porosity, TAGI, TIBEM, Reservoirs, outcropping analogues",
author = "Saturnina Henares and C{\'e}sar Viseras and {Fern{\'a}ndez Mart{\'i}nez}, Juan and {Pla Pueyo}, Sila and Giuseppe Cultrone",
year = "2011",
language = "English",
pages = "86",
note = "28th IAS Meeting of Sedimentology ; Conference date: 05-07-2011 Through 08-07-2011",

}

RIS

TY - CONF

T1 - Environmental control on the petrological characteristics of fluvial sandstones- A Triassic example.

AU - Henares, Saturnina

AU - Viseras, César

AU - Fernández Martínez, Juan

AU - Pla Pueyo, Sila

AU - Cultrone, Giuseppe

PY - 2011

Y1 - 2011

N2 - The Triassic red beds successions that crop out in the Tabular Cover of the Iberian Meseta, SE Spain(TIBEM), are an excellent example of sandstone bodies deposited in different environmental contexts,particularly those of braidplain, channel fill (meandering, straight, braided and anastomosed) and overbank(crevasse splay lobes and sheet floods). In all cases, the sandstone bodies are laterally and vertically well sealedby overbank fines, and resemble the productive beds of the TAGI (Algeria). However, a preliminary petrologicalstudy and a first approach to the characteristics of the porous system, using optical microscopy and mercuryinjection porosimetry techniques, have revealed the main microscale differences between these types ofdeposits.The primary mineralogy is dominated, in all cases, by quartz and potassium feldspar, with minor amounts ofplagioclase. Grain-coating Fe oxides (hematite), clays (illite, kaolinite and chlorite), mica (biotite), tourmaline andother opaque detrital minerals have been identified as accessory minerals. Kaolinite and sericite are also presentas alteration products of feldspars. These data allow to classify the deposits as arkosic-subarkosic arenites.The microtexture of the studied samples is characterized by well sorted grains, with quite spherical, subangularto subrounded morphology. The grain size varies from fine to medium (125 to 200 'm), being finer in overbankand channel fill deposits than in the braidplain ones. The fabric is mostly grain-supported, with preferredorientation of grains particularly evident in overbank and channel fill deposits.In the sampled braidplain sediments, the low mechanically infiltrated clay content and the grade ofcementation stand out. In this group the materials with the highest values of primary porosity (more than 25%),as well as with the largest pore radius are included, showing an unimodal distribution of sizes at around 30 'm.In the overbank and channel fill deposits, the occurrence of carbonate, silica and/or gypsum cements and thepresence of intersticial clay considerably reduces the primary porosity (less than 17%). Moreover, the poreradius tends to be lesser with a bimodal distribution of sizes at around 1 and 0.1 'm.This preliminary study reveals that the environmental context directly affects the petrological characteristicsand the petrophysical properties, which in turn control other features of the deposits such as their potential asreservoir rocks.

AB - The Triassic red beds successions that crop out in the Tabular Cover of the Iberian Meseta, SE Spain(TIBEM), are an excellent example of sandstone bodies deposited in different environmental contexts,particularly those of braidplain, channel fill (meandering, straight, braided and anastomosed) and overbank(crevasse splay lobes and sheet floods). In all cases, the sandstone bodies are laterally and vertically well sealedby overbank fines, and resemble the productive beds of the TAGI (Algeria). However, a preliminary petrologicalstudy and a first approach to the characteristics of the porous system, using optical microscopy and mercuryinjection porosimetry techniques, have revealed the main microscale differences between these types ofdeposits.The primary mineralogy is dominated, in all cases, by quartz and potassium feldspar, with minor amounts ofplagioclase. Grain-coating Fe oxides (hematite), clays (illite, kaolinite and chlorite), mica (biotite), tourmaline andother opaque detrital minerals have been identified as accessory minerals. Kaolinite and sericite are also presentas alteration products of feldspars. These data allow to classify the deposits as arkosic-subarkosic arenites.The microtexture of the studied samples is characterized by well sorted grains, with quite spherical, subangularto subrounded morphology. The grain size varies from fine to medium (125 to 200 'm), being finer in overbankand channel fill deposits than in the braidplain ones. The fabric is mostly grain-supported, with preferredorientation of grains particularly evident in overbank and channel fill deposits.In the sampled braidplain sediments, the low mechanically infiltrated clay content and the grade ofcementation stand out. In this group the materials with the highest values of primary porosity (more than 25%),as well as with the largest pore radius are included, showing an unimodal distribution of sizes at around 30 'm.In the overbank and channel fill deposits, the occurrence of carbonate, silica and/or gypsum cements and thepresence of intersticial clay considerably reduces the primary porosity (less than 17%). Moreover, the poreradius tends to be lesser with a bimodal distribution of sizes at around 1 and 0.1 'm.This preliminary study reveals that the environmental context directly affects the petrological characteristicsand the petrophysical properties, which in turn control other features of the deposits such as their potential asreservoir rocks.

KW - SANDSTONE

KW - Triassic

KW - petrology

KW - porosity

KW - TAGI

KW - TIBEM

KW - Reservoirs

KW - outcropping analogues

M3 - Abstract

SP - 86

T2 - 28th IAS Meeting of Sedimentology

Y2 - 5 July 2011 through 8 July 2011

ER -