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An orientation soil survey at the Pebble Cu-Au-Mo porphyry deposit, Alaska

June 1, 2009

Soil samples were collected in 2007 and 2008 along three traverses across the giant Pebble Cu-Au-Mo porphyry deposit. Within each soil pit, four subsamples were collected following recommended protocols for each of ten commonly-used and proprietary leach/digestion techniques. The significance of geochemical patterns generated by these techniques was classified by visual inspection of plots showing individual element concentration by each analytical method along the 2007 traverse. A simple matrix by element versus method, populated with a value based on the significance classification, provides a method for ranking the utility of methods and elements at this deposit. The interpretation of a complex multi-element dataset derived from multiple analytical techniques is challenging. An example of vanadium results from a single leach technique is used to illustrate the several possible interpretations of the data.

Citation Information

Publication Year 2009
Title An orientation soil survey at the Pebble Cu-Au-Mo porphyry deposit, Alaska
Authors Steven M. Smith, Robert G. Eppinger, David L. Fey, Karen D. Kelley, S. A. Giles
Publication Type Conference Paper
Publication Subtype Conference Paper
Index ID 70156383
Record Source USGS Publications Warehouse
USGS Organization Central Mineral and Environmental Resources Science Center