Chemical analyses and statistical data for stream sediment samples from the Chandalar quadrangle, Alaska

Abstract

This report is preliminary and has not been edited or reviewed for conformity with Geological Survey standards Analytical and statistical data for 1019 stream sediment samples from the Chandalar quadrangle are given on Table 1. The sample localities are shown on Figure 1. 848 of the samples were collected in the 1975 field season; 171 samples were collected from 1958-1967 (Brosge and Reiser, 1970. Samples were collected from the active stream channel wherever possible; where this was not possible, samples were collected from bank or terrace deposits adjacent to the channel. The stream-sediment samples were air dried and prepared by shaking through an 80-mesh stainless steel sieve. The minus-80-mesh fraction was saved for analyses. Most samples were analyzed by a six-step, DC-arc, semiquantitative emission spectrographic method described by Grimes and Marranzino (1968) for the analysis of geologic material.Selected samples were analyzed for gold, silver, and zinc by atomic absorption methods described by Ward and others (1969). Antimony was determined by the atomic absorption method developed by We!sen and Chao (1975). Arsenic was analyzed by a colorimetric method described by Ward and others (1963). The analyses were done by M.