DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY · 2010. 12. 12. · DEPARTMENT OF THE INTERIOR...

21
DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Gold analyses of 881 stream sediment samples from the western Payette National Forest and contiguous areas, Idaho By J.B. McHugh,* K.C. Watts Jr.,* H.N. Barton,* and H.D. King* Open-File Report 93-527 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards. Any use of brand or trade names in this report is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey * U. S. Geological Survey, DFC, Box 25046, MS973, Denver CO 80225 1993

Transcript of DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY · 2010. 12. 12. · DEPARTMENT OF THE INTERIOR...

Page 1: DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY · 2010. 12. 12. · DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Gold analyses of 881 stream sediment samples from the western

DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY

Gold analyses of 881 stream sediment samples

from the western Payette National Forest and

contiguous areas, Idaho

By

J.B. McHugh,* K.C. Watts Jr.,* H.N. Barton,* and H.D. King*

Open-File Report 93-527

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards. Any use of brand or trade names in this report is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey

* U. S. Geological Survey, DFC, Box 25046, MS973, Denver CO 80225

1993

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CONTENTS

Page

Introduction................................................ 1

Sample Collection........................................... 2

Sample Preparation.......................................... 2

Analytical Procedures........................................ 3

References Cited............................................. 3

ILLUSTRATIONS

Figure 1. Index map of the western Payette National Forestand contiguous areas, Idaho.................................. 4

TABLES

Table 1. Gold analyses of 881 stream sediment samples, western Payette National Forest and contiguous areas, Idaho.......... 5

MISCELLANEOUS

One high-density 5 1/4 inch diskette in pocket

Page 3: DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY · 2010. 12. 12. · DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Gold analyses of 881 stream sediment samples from the western

INTRODUCTION

As part of the mineral resource evaluation of the Payette National Forest, Idaho, 881 stream-sediment samples from the western one-half of the forest were analyzed for gold. These samples consist of 172 collected by the USGS in the summer of 1992, and 709 that were collected in fall 1979 as part of the National Uranium Resource Evaluation (NURE) program (Cook, 1981) . The NURE samples were recovered for analysis from USGS storage facilities. The area represented by these analyses is west of 116 00' 00" longitude (fig. 1), and includes the western Payette National Forest and contiguous areas within the Baker 1x2 quadrangle. These gold analyses were considered necessary in this part of the Payette National Forest because gold data were lacking and because the area contains favorable geologic terranes for the occurrence of gold deposits.

These data are tabulated in table 1 and listed digitally on the accompanying diskette located in the pocket of this report. The digital analytical data is in spreadsheet format Quattro Pro version 4.0. The collectors of the samples, whether USGS or NURE contractor, are indicated in the primary field ID (col. 1, table 1). Samples collected in the NURE program are prefixed by the letters BA, identifying the Baker 1x2 quadrangle; those collected by the USGS are prefixed by 92, the year of collection.

SAMPLE COLLECTION

Specific information with respect to NURE sampling procedures are given in Price and Jones (1979) . In general, methods employed by the NURE field parties were similar to those of the USGS. Many of the sample sites selected during the NURE program, however, were on larger streams than those sampled under USGS strategy. Samples collected by the USGS were from active stream channels in tributary drainage basins. Sampled tributaries ranged from 1 to 3 miles in length. Samples consisted of about 0.5 Kg composites of sand, silt, and clay material. Stream-site observations such as size of tributary, types of stream bed clasts, proportion of sediment sizes, amount of organic matter, and other pertinent data were recorded on check lists carried by the field sampling parties.

SAMPLE PREPARATION

Although samples collected and prepared by the USGS are treated equivalent to those derived from the NURE program, sample preparation procedures differed slightly. Samples gathered by the USGS are routinely sieved to <177 microns, whereas the samples collected during the NURE program were sieved slightly finer (<149 microns). These preparatory variations notwithstanding, we consider the two sample fractions

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sufficiently similar texturally that concern over gold value discrepancy due to grain size differences is not warranted.

ANALYTICAL PROCEDURES

The gold content of the stream-sediment samples was determined using an atomic-absorption spectrophotometric method described below:

A 5-gm sample is roasted for 1 hour at 650 C. Gold is then extracted with a hydrobromic acid- 0.5 bromine solution and MIBK (Methyl isobutyl ketone). Electrothermal atomic-absorption spectroscopy is used to determine gold to 0.001 ppm (1 ppb) (O 1 Leary and Meier, 1986).

REFERENCES CITED

Cook, J.R., 1981, Baker 1x2 NTMS area, Oregon and Idaho;data report (abbreviated): Aiken, South Carolina, E.I.duPont de Nemours and Co., Savanna River Laboratory,Report No. GJBX-231-81, 17 p.

Price, V., and Jones, P.L., 1979, Training manual for waterand sediment geochemical reconnaissance: Aiken, SouthCarolina, E.I. duPont de Nemours and Co., Savanna RiverLaboratory, SRL Internal Document DPST-79-219, p.

O'Leary, R.M., and Meier, A.L., 1986, Analytical methods used ingeochemical exploration, 1984: U. S. Geological SurveyCircular 948, 48 p.

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116°00'

PAYETTE

NATIONAL FOREST

WASHINGTON

Figure 1. Index map of the western Payette National Forest and contiguous areas, Idaho

Page 6: DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY · 2010. 12. 12. · DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Gold analyses of 881 stream sediment samples from the western

Table 1. Gold analyses of 881 stream sediment samples, western Payette National Forest and contiguous areas , I d ah o (L~1ess t h an .001 p p m)

PRIME_._ID

BAAE001 BAAE002 BAAE003 BAAE004 BAAE005 BAAE007 BAAE008 BAAE009 BAAE020 BAAE02.1 BAAE026 BAAE027 BAAE028 BAAE029 BAAE030 BAAE031 BAAE033 BAAE034 BAAE035 BAAE037 BAAE03S BAAE039 BAAE040 BAAE041 BAAE042 BAAE044 BAAE045 BAAE046 BAAF004 BAAF005 BAAF006 BAAF007 BAAFOOS BAAF009 BAAF01O BAAFO1 1 BAAF012 BAAFO 13 BAAFO 14 BAAFO 15 BAAFO 16 BAAFO 1S BAAFOIS BAAF020 BAAF021 BAAF022 BAAF023 BAAF024 BAAF025 BAAF026

SECND_ID

D-5 18221D-5 18222D 5 18223D-5 18224D . c-; 1 o "".' o c-'.

vJ J. O jC. jL. \~)

D--5 18226D-5 18227D-5 18228D-5 18238D-5 18239D-5 1824 3D-5 18244D-5 18245D-5 18246D-5 18247D-5 18248D-5 18250D . e~ 1 Q "iff 1

..J 1 O.r.:%J .1

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D-5 18257D-5 18258D-5 18259D-5 18260D-5 18261D-5 18262D-5 18263D-5 18264D-5 18265D-5 18266D-5 1826 7D-5 18268D-5 18269D-5 18270D-5 18271D o 1 8 2 / j~D-5 18273D-5 18274D--5 18276D-5 18277D-5 18278D-5 18279D-5 18230D-5 18281D-5 18282D-5 18283D-5 18284

LAT I TUDE

4-4 . 986 1 044 . 9656044. 8250044 . 3600044.8739044.9186044. 9492044.9786044.9431044.8289044.8075044.7789044. 7594044.7514044.7739044.7589044. 7869044.7547044.7525044 . 8650044 . 8750044 . 8789044.8953044.9150044. 9914044.8147044.8028044 . 8239044.8272044. 8078044.8178044 . 8078044. 8056044 . 8300044. 8550044. 8647044. 8944044 . 9203044. 7942044. 8261044.8117044.8542044.8661044 . 8858044. 8942044. 9222044.9647044 . 9925044. 9822044 . 95500

LONGITUDE

116.82610116. 83690116. 900001 16.89000116.86890116.84310116.84810116.86310116.88000116.94110116. 9 1 6 1 0116. 90500116.90310116.86310116.93810116. 94 1 90116.92110116. 80690116.78610116.81110116.79500116.78610116.766901 1 6 . 753 1 0116.75610116.85610116. 82890116. 87 1 1 0116.51690116.56690116. 588901 16.60500116.62390116.5511 0116.57610116. 58690116.56390116.56310116.51810116.65810116.66890116.63610116.68000116.64390116. 620OO1 1 6 . 6 1 390116.620001 1 6 . 6 1 1 1 0116. 656 1 0116.65500

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Page 8: DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY · 2010. 12. 12. · DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Gold analyses of 881 stream sediment samples from the western

BAAG042 BAAG043 BAAQ044 BAAH001 BAAH002 BAAH003 BAAH004 BAAH005 BAAH006 BAAH007 BAAH008 BAAH009 BAAHO10 BAAH011 BAAHO 12 BAAHO13 BAAHO 14 BAAHO15 BAAHO 16 BAAHO 1 7 BAAHO 18 BAAHO 19 BAAH020 BAAH021 BAAH022 BAAH023 BAAH024 BAAH025 BAAH026 BAAH027 BAAH028 BAAH029 BAAH030 BAAH031 BAAH032 BAAH033 BAAH034 BAAH035 BAAH036 BAAH037 BAAH033 BAAH039 BABE001 BABE002 BABE003 BABE004 BABE005 BABE006 BABE007 BABE008 BABE009 BABEO10 BABE011 BABEO 12 BABEO 14 BABEO 15

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Page 13: DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY · 2010. 12. 12. · DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Gold analyses of 881 stream sediment samples from the western

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Page 14: DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY · 2010. 12. 12. · DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Gold analyses of 881 stream sediment samples from the western

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Page 18: DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY · 2010. 12. 12. · DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Gold analyses of 881 stream sediment samples from the western

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Page 19: DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY · 2010. 12. 12. · DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Gold analyses of 881 stream sediment samples from the western

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