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Ministry of Energy Mines and Responsible for Core Review

GeoFile 2018-4

Compilation of geochemical data between Lillooet and French Bar Creek, south-central British Columbia

R.E. Lett


Results of two multi-media geochemical surveys along the west side of the Fraser River between Lillooet and French Bar Creek were originally published in British Columbia Geological Survey Fieldwork papers in 2006 and 2007, but the digital data for the surveys were not released. A compilation of the results from the two surveys, the raw data of which are released herein as readily accessible spreadsheets, reveals a strong geochemical expression of epithermal gold mineralization from occurrences in the ‘Watson Bar gold belt’ as anomalous Au, As, As, and Hg in stream sediments. The highest Au, As, Cu, and Pb concentrations are in bedrock at the Watson Bar developed prospect. Gold mineralization is also reflected by elevated As in stream water. Several other Au anomalies in stream sediment and bedrock lack a clear source of Au mineralization. Sediment and water from Boiler Creek near the northern limit of the project area have anomalous REE levels. The sediment and water also have elevated Al and Fe values suggesting that the source for the REEs may be clay minerals weathered from volcanic rocks.



View GeoFile 2018-4 (PDF, 18.4 MB)


Download Appendices 1-6 (Zip, Excel, 0.2 MB)


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