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TitrePortable X-ray fluorescence in stream sediment chemistry and indicator mineral surveys, Lonnie carbonatite complex, British Columbia
AuteurLuck, P; Simandl, G J
SourceGeological Fieldwork 2013, British Columbia Ministry of Energy and Mines, British Columbia Geological Survey Paper 2014-1; British Columbia Ministry of Energy, Mines and Petroleum Resources, Paper 2014-1, 2013 p. 169-182
LiensOnline - En ligne
Année2013
Séries alt.Secteur des sciences de la Terre, Contribution externe 20120505
ÉditeurBritish Columbia Ministry of Energy, Mines and Natural Gas
Documentpublication en série
Lang.anglais
Mediapapier
Formatspdf
ProvinceColombie-Britannique
SNRC93I; 93J; 93K; 93N; 93O; 93P; 94A; 94B; 94C
Lat/Long OENS-126.0000 -120.0000 57.0000 54.0000
Sujetsniobium; analyses de la roche, éléments de terres rares; carbonatites; minéraux; éléments d'indice
Illustrationslocation maps; photographs; tables; graphs
ProgrammeÉtude des gîtes des métaux rares, Initiative géoscientifique ciblée (IGC-4)
Résumé(disponible en anglais seulement)
The Lonnie carbonatite complex is the third most developed Nb prospect in the British Columbia alkaline province. The objective of this study was to determine the best size fraction of stream sediments for carbonatite related indicator mineral surveys. Sediments from seven sites along Granite Creek, a stream that transects the Lonnie deposit and adjacent bedrock units, were sampled for pXRF and pathfi nder element studies. The results for key pathfi nder elements including Nb, Ta, La, Ce, Pr, Nd, Y, P, Sr, Ba, Th, and U were precise (most having %RSD less than 5%) and prone to bias. Results for eight size fractions separated by laboratory sieves indicated a systematic distribution of key elements, with the highest abundances found in the fi ner size fractions. Of these, the +125?m fraction was chosen for further consideration due to its suitability for continued indicator mineral studies. With the exception of Ba, Sr, and possibly Nb samples upstream from the Lonnie deposit display higher concentrations of carbonatite pathfi nder elements than samples downstream of the deposit. This indicates source(s) farther upstream, probably the Vergil carbonatite and Nb and TREE + Y soil geochemical anomalies. Indicator mineral studies are ongoing.
GEOSCAN ID296085