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Microsc Microanal. 2015 Aug;21(4):961-8. doi: 10.1017/S1431927615000653. Epub 2015 May 29.

Characterization of Darai Limestone Composition and Porosity Using Data-Constrained Modeling and Comparison with Xenon K-Edge Subtraction Imaging.

Author information

1
1CSIRO Manufacturing Flagship,Private Bag 10,Clayton,VIC 3169,Australia.
2
2CSIRO Energy Flagship,P.O. Box 1130,Bentley,WA 6102,Australia.
3
3Swiss Light Source,Paul Scherrer Institut,5232 Villigen PSI,Switzerland.
4
5Australian Synchrotron,800 Blackburn Rd,Clayton,VIC 3168,Australia.

Abstract

Data-constrained modeling is a method that enables three-dimensional distribution of mineral phases and porosity in a sample to be modeled based on micro-computed tomography scans acquired at different X-ray energies. Here we describe an alternative method for measuring porosity, synchrotron K-edge subtraction using xenon gas as a contrast agent. Results from both methods applied to the same Darai limestone sample are compared. Reasonable agreement between the two methods and with other porosity measurements is obtained. The possibility of a combination of data-constrained modeling and K-edge subtraction methods for more accurate sample characterization is discussed.

KEYWORDS:

K-edge subtraction; data-constrained modeling; micro-CT; porosity; synchrotron

PMID:
26021343
DOI:
10.1017/S1431927615000653

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