AERYN: a simple standalone application for visualizing and enhancing elemental maps

• Published in: Applied Geochemistry
• Main Authors: Mouchi, Vincent, Crowley, Quentin G., Ubide, Teresa
• Format: Article in Journal/Newspaper
• Language: English
• Published: Pergamon Press 2016
• Subjects: Biominerals; EDS; Element distribution maps; LA-ICP-MS; Matlab; Processing; WDS; 1906 Geochemistry and Petrology; 2304 Environmental Chemistry; 2310 Pollution; Lophelia pertusa
• Online Access: https://espace.library.uq.edu.au/view/UQ:412051/UQ412051_OA.pdf; https://espace.library.uq.edu.au/view/UQ:412051

Interpretation of high spatial resolution elemental mineral maps can be hindered by high frequency fluctuations, as well as by strong naturally-occurring or analytically-induced variations. We have developed a new standalone program named AERYN (Aspect Enhancement by Removing Yielded Noise) to produce more reliable element distribution maps from previously reduced geochemical data. The program is Matlab-based, designed with a graphic user interface and is capable of rapidly generating elemental maps from data acquired by a range of analytical techniques. A visual interface aids selection of appropriate outlier rejection and drift-correction parameters, thereby facilitating recognition of subtle elemental fluctuations which may otherwise be obscured. Examples of use are provided for quantitative trace element maps acquired using both laser ablation (LA-) ICP-MS and electron probe microanalysis (EPMA) of the cold-water coral Lophelia pertusa. We demonstrate how AERYN allows recognition of high frequency elemental fluctuations, including those which occur perpendicular to the maximum concentration gradient. Such data treatment compliments commonly used processing methods to provide greater flexibility and control in producing elemental maps from micro-analytical techniques.