DBPapers
DOI: 10.5593/sgem2010.1.3.S1.816

DEVELOPMENT AND TESTING OF DOWN-THE-HOLE DEPLOYABLE X-RAY FLUORESCENCE SPECTROMETER

AUTHOR/S: G. A. CARTER, V. A. GOLOVANEVSKIY
Sunday 1 August 2010 by Libadmin2010

10th International Multidisciplinary Scientific GeoConference - SGEM2010, www.sgem.org, SGEM2010 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 20-26, 2010, Vol. 1, 407-414 pp

ABSTRACT

To allow a truly in-situ elemental analysis, an Australian resource company
commissioned the development and building of a down-the-hole deployable ED-XRF
sensor. The instrument was designed to be deployable up to a depth of 30 m for drill
holes of varying diameters as well as being run in a bench-top mode.

Following the development and upon commissioning, the ED-XRF system was
investigated in the laboratory for its suitability for use in the Iron Ore industry by using
well characterised crushed iron ore samples, standards made from analytical reagents
and large iron ore rocks that had been sectioned to provide a curved surface for
presentation to the XRF. The effects of operating conditions and other parameters were
studied using the standards made from the analytical reagents. It was found that the
system could be used to determine the elemental Fe content with reasonable accuracy
when used on crushed powder samples. The curved surfaces of the sectioned rocks
increased the variability of the amount of Fe detected.

Two trace elements, Al and Si were also investigated using the same methodology. It
was found that the ED-XRF system was not suitable for distinguishing the Al and Si .

This paper outlines the ED-XRF system used, the testing methodology employed and
the results of the laboratory testing.

Keywords: Down-The-Hole, X-Ray Fluorescence Spectroscopy, Field deployable