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Mapping and quantifying the clay aggregate microporosity in medium- to coarse-grained sandstones using the (super 14) C-PMMA Method

Paul Sardini, Abderrazak El Albani, Dimitri Pret, Stephane Gaboreau, Marja Siitari-Kauppi and Daniel Beaufort
Mapping and quantifying the clay aggregate microporosity in medium- to coarse-grained sandstones using the (super 14) C-PMMA Method
Journal of Sedimentary Research (August 2009) 79 (8): 584-592

Abstract

Microporous aggregates of kaolin minerals and illite are common products filling the intergranular volume (IGV) of deeply buried sandstones. Using BSEi (backscattered electron imaging), a full analysis of IGV is difficult and time consuming since it necessitates a two-step process, at the scales of (1) macroporosity between the detrital grains, and (2) microporosity within the clay aggregates. The (super 14) C-PMMA method permits the mapping and quantification of the connected porosity in sandstone core samples across scales. This method is based on the complete impregnation of the connected porosity by (super 14) C-labeled MethylMethAcrylate (MMA) monomer, and its subsequent in situ polymerization. Imaging the spatial distribution of the radioactive tracer within a section of an impregnated sample allows an integrated analysis of IGV from the core scale to the nanometer scale. This technique is illustrated through analysis of the clay cement of a medium- to coarse-grained sandstone from the Athabasca Basin (Canada). The measured connected porosity distributions of kaolin mineral aggregates (average porosity 42%) and illite fillings (average porosity 70%) are in accordance with Gaussian distributions. This method also permits quantification of the relative volumetric amounts of the both illite and kaolin aggregate.


ISSN: 1527-1404
EISSN: 1938-3681
Serial Title: Journal of Sedimentary Research
Serial Volume: 79
Serial Issue: 8
Title: Mapping and quantifying the clay aggregate microporosity in medium- to coarse-grained sandstones using the (super 14) C-PMMA Method
Affiliation: Universite de Poitiers, HydrASA, Poitiers, France
Pages: 584-592
Published: 200908
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 33
Accession Number: 2009-086736
Categories: Isotope geochemistrySedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, 5 plates
N57°00'00" - N59°30'00", W111°30'00" - W102°00'00"
Secondary Affiliation: University of Helsinki, FIN, Finland
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 200947
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