| Title | Portable X-ray fluorescence in stream sediment chemistry and indicator mineral surveys, Lonnie carbonatite complex, British Columbia |
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| Author | Luck, P; Simandl, G J |
| Source | Geological 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  Open Access |
| Links | Online - En ligne
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| Image |  |
| Year | 2013 |
| Alt Series | Earth Sciences Sector, Contribution Series 20120505 |
| Publisher | British Columbia Ministry of Energy, Mines and Natural Gas |
| Document | serial |
| Lang. | English |
| Media | paper |
| File format | pdf |
| Province | British Columbia |
| NTS | 93I; 93J; 93K; 93N; 93O; 93P; 94A; 94B; 94C |
| Area | Lonnie; Aley; Wicheeda; Granite Creek |
| Lat/Long WENS | -126.0000 -120.0000 57.0000 54.0000 |
| Subjects | niobium; rock analyses, rare earth elements; carbonatites; minerals; indicator elements |
| Illustrations | location maps; photographs; tables; graphs |
| Program | Targeted Geoscience Initiative (TGI-4) Rare-Metal Ore Systems |
| Released | 2013 01 01 |
| Abstract | 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 ID | 296085 |
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