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TitleReport On a Reconnaissance Hydrogeochemistry Survey of the southwestern Drainages of Mount Cayley, British Columbia
AuthorRyder, A J D; Nevin Sadlier-Brown Goodbrand
SourceGeological Survey of Canada, Open File 1016, 1984, 28 pages (1 sheet), (Open Access)
Documentopen file
MapsPublication contains 1 map
Map Info.location, samples, 1:25,000
Mediapaper; on-line; digital
File formatpdf
ProvinceBritish Columbia
Lat/Long WENS-123.5000 -123.0000 50.2500 50.0000
Subjectsgeochemistry; thermal springs; water geochemistry; boreholes; surface waters; Mount Cayley Complex; Quaternary
Released1984 05 01; 2018 06 19
A reconnaissance hydrogeochemistry survey was conducted of the southwestern drainages of Mount Cayley, to identify anomalously mineral izea surface waters possibly associatea with hydrothermal fluids. conductivity measurements were taken in surface waters, and samples were collected for chloride (Cl- ) and sulphate (So4=) analysis. In addition samples from selected sites were submitted for more complete major element analysis, to characterize local thermal fluids and groundwaters. Thermal waters of variable composition exist over a considerable vertical range and areal extent at Mount Cayley. These waters include near-neutral pH sodium bicarbonate waters at h·igh elevation, encountered in the Shovelnose-2 drill hole, sodium chloride/bicarbonate/sulphate waters at the Turbid Creek hot springs, and sodium sulphate waters at the EMR 304-2 drill hole in the Squamish River Valley. Turbid Creek and Shovelnose Creek show distinct chemical "signatures" of the thermal effluent discharged to them from the hot springs in their respective drainages. Other anomalously mineralized surface waters were identified in the upper Shovelnose Creek drainage, in Hook Creek, and in the vicinity of the Cayley-1 drill hole. Sulphate concentrations in Terminal Creek are marginally below the calculated "threshold" value for local surface waters. Waters of high conductivity identified in the headwaters of Shovelnose Creek may be related to the high-bicarbonate thermal waters encountered at: Shovelnose-2. They appear to be associated with a late stage subvolcanic dacite dome.