The amount of trace Pb in potash feldspars can be correlated with the Pb ore deposits associated with igneous rocks. The Pb content of K feldspars separated from several quartz monzonite intrusives of the Basin and Range province has been determined spectrochemically. Samples were collected from the Tintic, West Mountain (Bingham), Park City-Little Cottonwood, and Iron Springs mining districts in Utah, and from the Robinson mining district and the Whitehorse Pass area in Nevada.

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