| Titre | Evaluation and optimization of acid processing procedures for the extraction of conodont elements from calcareous rock |
| Télécharger | Téléchargements |
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| Licence | Veuillez noter que la Licence du gouvernement
ouvert - Canada remplace toutes les licences antérieures. |
| Auteur | Gallotta, C; Gouwy, S A ; Komaromi, L |
| Source | Commission géologique du Canada, Dossier public 8792, 2021, 50p., https://doi.org/10.4095/328273  Accès ouvert |
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| Année | 2021 |
| Éditeur | Ressources naturelles Canada |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/328273 |
| Media | en ligne; numérique |
| Formats | pdf |
| Sujets | micropaléontologie; microfossiles; conodontes; preparation d'échantillons; géologie du substratum rocheux; lithologie; roches sédimentaires; carbonates; Méthodologie; Coût; Temps; paléontologie; Sciences
et technologie; Nature et environnement |
| Illustrations | tableaux; graphiques; graphique à barres; photomicrographies |
| Programme | GEM2 : La géocartographie de l'énergie et des minéraux Synthèse de GEM |
| Diffusé | 2021 05 20 |
| Résumé | (disponible en anglais seulement)
The purpose of this study was to identify alternative methods which would improve current conodont processing times and cost at the GSC-Calgary paleontology
lab. Conodont processing consists of several stages, most of which are completed within a single day. Acid digestion, however, is the longest processing stage and is also conveniently the most variable in terms of processing techniques. Therefore,
this is where this study seeks to improve. The current sample digestion technique utilizes an acetic acid solution which take a notably long time to completely process samples therefore, investigation into quicker techniques commonly used in other
labs utilizing formic acid were explored. Formic acid processing improved digestion time to 3 days compared to acetic acid processing's maximum of 56 days. Processing cost results favored acetic acid which totaled $126.41 for full processing of 2.5kg
samples, compared to formic processing cost of $101.73 for 1.0kg of sample which theoretically totals $127.99 per 2.5kg of sample. Lab productivity significantly improved using formic acid, capable of producing 350 samples per year opposed to 195
samples processed via acetic acid. Observing extracted specimen under a scanning electron microscope showed no difference between the processing methods. Both methods could produce pristine sample quality which was completely indistinguishable. Based
on these findings, the formic acid processing method can be used as a viable technique for the extraction of conodonts from calcareous rock and should be offered as a fast-track, but slightly more expensive alternative for sample
processing. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Ce rapport présente les résultats d'une analyse comparative des méthodes de traitement des microfossiles phosphatés issus de roches calcaires.
L'objectif était d'optimiser les méthodes utilisées dans le laboratoire de GSC-Calgary pour coûts, qualité des microfossiles libérés, durée de traitement et productivité du laboratoire, le tout pour rendre le laboratoire de conodontes plus
efficace. |
| GEOSCAN ID | 328273 |
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