Geochemical analyses of rock, soil, and stream sediment samples from the Big Frog Wilderness Study Area, Polk County, Tennessee and Fannin County, Georgia

Hopkins, R.T., Meir, A.L., Slack, John F.- jfslack@usgs.gov

Geochemical analyses of rock, soil, and stream sediment samples from the Big Frog Wilderness Study Area, Polk County, Tennessee and Fannin County, Georgia

Hopkins, R.T., Meir, A.L., Slack, John F.- jfslack@usgs.gov · 1979 · Report

<p>Semiquantitative spectrographic analyses for 31 elements and atomic absorption analyses for gold and zinc on 43 stream sediments, 5 panned concentrates,…

Public-domain full text preserved in the Mountain Man Mining Library. Original source: pubs.usgs.gov.

11110$01001 U.S. Department of the Interior Geological Surveyi tj AXt Geochemical analyses of rock, soil, and stream sediment samples from the Big Frog Wilderness Study Area, Polk County, Tennessee and Fannin County, Georgia by R. T. Hopkins, A. L. Meir, and J. F. Slack GO_OICAL SUR/if, rck JUL 25 1979 / Open-File Report 79-343 This report is preliminary and has not been edited or reviewed for conformity with Geological Sur7ev standards or nomenclature.

Geochemical analyses of rock, soil, and stream sediment samples from the Big Frog wilderness study area, Polk County, Tennessee, and Fannin County, Georgia by R.T. Hopkins, A.L. Meir, and J.F. Slack Abstract Semiquantitative spectrographic analyses for 31 elements and atomic absorption analyses for gold and zinc on 43 stream sediments, 5 panned concentrates, 65 soils, and 81 rock samples from the Big Frog Wilderness Study Area and vicinity, Polk County, Tennessee, and Fannin County, Georgia, are reported here in detail. Locations for all 194 samples are given in Universal Transverse Mercator (UTM) coordinates. Rocks analyzed include metasiltstone, metasandstone, metaconglomerate, slate, and vein quartz. The data contain no obviously anomalous values that might be related to economically recoverable mineralization.

Introduction The analyses reported here are on 194 samples from the Big and Fannin County, Georgia Frog Wilderness Study Area, Polk Count:, Tennessee/, collected in October, 1977, by J. F. Slack, E. R. Force, A. E. Grosz, and R. H. Ketelle, all of the U.S. Geological Survey. The samples include 81 rock chips, 65 soils, 5 panned concentrates, and 43 stream sediments. The rock samples mainly are 1 meter chip samples of representative material collected from outcrop or road cuts; a few samples are from float boulders along ridge crests. Some of the rock is partly weathered, but the freshest material available was sampled. Soil samples were taken below surficial organic material generally from the lower to middle parts of the A horizon, but in some places from the upper part of the B horizon. Stream sediment was collected from active and a few smaller intermittent drainages; heavy minerals from major drainages were artificially concentrated by standard panning techniques. Sample locations and discussion of the results of the analytical work are given by Slack, Gazdik, and Dunn (1979). The X and Y coordinates are Universal Transverse Mercator (UTM) grid, zone 16, Caney Creek, Ducktown, Hemp Top, and Epworth (Tenn.-Ga.) U.S. Geological Survey 7.5 minute Topographic Quadrangle Maps. The X coordinate is the easting value; the Y is the northing.

Analytical techniques Rock samples were crushed to approximately 0.25 inch (6 mm) and pulverized to minus 140-mesh (0.105 hua) in a vertical grinder with ceramic plates. Stream sediments and soils were dried and sieved to minus 80-mesh (0.177 mm) and then pulverized. Pan concentrates were dried and ground with a mortar and pestle. Each sample was analyzed semiquantitatively for 31 elements by a six-step, D.C. arc, optical emission spectrographic method (Grimes and Marranzino, 1968). In addition, each sample was analyzed by an atomic absorption technique for gold and zinc (Ward and others, 1969). The semiquantitative spectrographic values are reported as six steps per order of magnitude (1, 0.7, 0.5, 0.3, 0.2, 0.15, or multiples of 10 of these numbers) and are approximate geometric midpoints of the concentration ranges. The precision is shown to be within one adjoining interval on each side of the reported value 83 percent of the time and within two adjoining intervals 96 percent of the time (Motooka and Grimes, 1976).

Explanation of table Iron, magnesium, calcium, and titanium values are reported in percent (%); all others are in parts per million. Letters preceeding chemical symbols indicate the methods of analysis: S, six-step semiquantitative spectrographic method; AA, atomic absorption. Other symbols represented on the table are: N, not detected; --, not determined; amount detected is below the lowest limit of determination, which is figure shown; amount detected is above the highest limit of determination, which is figure shown. The table is divided into 4 sections by sample type: soil, stream sediment and panned concentrates ("P" follows sample number), quartz veins, and rock chips. The rock samples are further subdivided lithologically into slate, siltstone, sandstone, and conglomerate from two areas on the northwest and southeast sides of the Greenbrier Fault. Soils.--Elements looked for spectrographically but not found, except as noted, and their lower limits of determination, in ppm (value in parentheses): Ag(0.5) except K008 and K020 which are reported as <0.5 and K004 and K047 which are reported as 0.5; As(200); Au(0.05) except G035 and S077 which are reported respectively as 0.05 and <.05; Bi(10); Cd(20); Mo(5) except F059 which is reported as <5; Sb(100); Sn(10); Th(100); W(50). Stream sediment and panned concentrates.--Elements looked for but not found, except as noted,, and their lower limits of determination, in ppm (value in parentheses): Ag(0.5); As(200); Au(0.05); Bi(10); Cd(20); Mo(5) except 5001, S059, F045, and G018, which are reported respectively as 5, 5, 10, and <5; Sb(100); Sn(10); Th(100)1,,W450-,

Quartz veins.--Elements looked for but not found, and their lower limits of determination, in ppm (value in parentheses): Ag(0.5); As(200); Au(0.05); Bi(10); Cd(20); Mo(5); Nb(20); Sb(100); Sn(10); Sr(100); Th(100); W(50). Slate.--Elements looked for but not found, except as noted, and their lower limits of determination, in ppm (value in parentheses): Ag(0.5); As(200) except 5011 which is reported as 500; Au(0.05); Bi(10); Cd(20); Mo(5) except F069 and G004 which are reported respectively as 7 and <5; Nb(20) except K006, K050, S011, and S084 which are reported as <20, and S148 which is reported as 20; Sb(100); Sn(10); Th(100); W(50). Conglomerate-sandstone-siltstone.--Elements looked for but not found, except as noted, and their lower limits of determination, in ppm (value in parentheses): Ag(0.5); As(200); Au(0.05); Bi(10); Cd(20); Mo(5); Sb(100); Sn(10); Th(100); W(50).

References cited Grimes, D.J., and Marranzino, A.P., 1968, Direct-current arc and alternating-current spark emission spectrographic field methods for the semiquantitative analysis of geologic materials: U.S. Geological Survey Circular 591, 6 p. Motooka, J.M., and Grimes, D.J., 1976, Analytical precision of onesixth order semiquantitative spectrographic analyses: U.S. Geoloigcal Survey Circular 738, 25 p. Slack, J.F., Gazdik, G.C., and Dunn, M.L„ Jr., 1979, Mineral resources of the Big Frog Wilderness Study Area, Polk County, Tennessee, and Fannin County, Georgia: U.S. Geological Survey Open-File Report OF 79-1209, 39 p. Ward, F. N., Nakagawa, H. M., Harms, T. F., and Van Sickle, G. H., 1969, Atomic absorption methods of analysis useful in geochemical exploration: U. S. Geological Survey Bulletin 1289, 45 p.

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11110$01001 U.S. Department of the Interior Geological Surveyi tj AXt Geochemical analyses of rock, soil, and stream sediment samples from the Big Frog Wilderness Study Area, Polk County, Tennessee and Fannin County, Georgia by R. T. Hopkins, A. L. Meir, and J. F. Slack GO_OICAL SUR/if, rck JUL 25 1979 / Open-File Report 79-343 This report is preliminary and has not been edited or reviewed for conformity with Geological Sur7ev standards or nomenclature.

Geochemical analyses of rock, soil, and stream sediment samples from the Big Frog wilderness study area, Polk County, Tennessee, and Fannin County, Georgia by R.T. Hopkins, A.L. Meir, and J.F. Slack Abstract Semiquantitative spectrographic analyses for 31 elements and atomic absorption analyses for gold and zinc on 43 stream sediments, 5 panned concentrates, 65 soils, and 81 rock samples from the Big Frog Wilderness Study Area and vicinity, Polk County, Tennessee, and Fannin County, Georgia, are reported here in detail. Locations for all 194 samples are given in Universal Transverse Mercator (UTM) coordinates. Rocks analyzed include metasiltstone, metasandstone, metaconglomerate, slate, and vein quartz. The data contain no obviously anomalous values that might be related to economically recoverable mineralization.

Introduction The analyses reported here are on 194 samples from the Big and Fannin County, Georgia Frog Wilderness Study Area, Polk Count:, Tennessee/, collected in October, 1977, by J. F. Slack, E. R. Force, A. E. Grosz, and R. H. Ketelle, all of the U.S. Geological Survey. The samples include 81 rock chips, 65 soils, 5 panned concentrates, and 43 stream sediments. The rock samples mainly are 1 meter chip samples of representative material collected from outcrop or road cuts; a few samples are from float boulders along ridge crests. Some of the rock is partly weathered, but the freshest material available was sampled. Soil samples were taken below surficial organic material generally from the lower to middle parts of the A horizon, but in some places from the upper part of the B horizon. Stream sediment was collected from active and a few smaller intermittent drainages; heavy minerals from major drainages were artificially concentrated by standard panning techniques. Sample locations and discussion of the results of the analytical work are given by Slack, Gazdik, and Dunn (1979). The X and Y coordinates are Universal Transverse Mercator (UTM) grid, zone 16, Caney Creek, Ducktown, Hemp Top, and Epworth (Tenn.-Ga.) U.S. Geological Survey 7.5 minute Topographic Quadrangle Maps. The X coordinate is the easting value; the Y is the northing.

Analytical techniques Rock samples were crushed to approximately 0.25 inch (6 mm) and pulverized to minus 140-mesh (0.105 hua) in a vertical grinder with ceramic plates. Stream sediments and soils were dried and sieved to minus 80-mesh (0.177 mm) and then pulverized. Pan concentrates were dried and ground with a mortar and pestle. Each sample was analyzed semiquantitatively for 31 elements by a six-step, D.C. arc, optical emission spectrographic method (Grimes and Marranzino, 1968). In addition, each sample was analyzed by an atomic absorption technique for gold and zinc (Ward and others, 1969). The semiquantitative spectrographic values are reported as six steps per order of magnitude (1, 0.7, 0.5, 0.3, 0.2, 0.15, or multiples of 10 of these numbers) and are approximate geometric midpoints of the concentration ranges. The precision is shown to be within one adjoining interval on each side of the reported value 83 percent of the time and within two adjoining intervals 96 percent of the time (Motooka and Grimes, 1976).

Explanation of table Iron, magnesium, calcium, and titanium values are reported in percent (%); all others are in parts per million. Letters preceeding chemical symbols indicate the methods of analysis: S, six-step semiquantitative spectrographic method; AA, atomic absorption. Other symbols represented on the table are: N, not detected; --, not determined; amount detected is below the lowest limit of determination, which is figure shown; amount detected is above the highest limit of determination, which is figure shown. The table is divided into 4 sections by sample type: soil, stream sediment and panned concentrates ("P" follows sample number), quartz veins, and rock chips. The rock samples are further subdivided lithologically into slate, siltstone, sandstone, and conglomerate from two areas on the northwest and southeast sides of the Greenbrier Fault. Soils.--Elements looked for spectrographically but not found, except as noted, and their lower limits of determination, in ppm (value in parentheses): Ag(0.5) except K008 and K020 which are reported as <0.5 and K004 and K047 which are reported as 0.5; As(200); Au(0.05) except G035 and S077 which are reported respectively as 0.05 and <.05; Bi(10); Cd(20); Mo(5) except F059 which is reported as <5; Sb(100); Sn(10); Th(100); W(50). Stream sediment and panned concentrates.--Elements looked for but not found, except as noted,, and their lower limits of determination, in ppm (value in parentheses): Ag(0.5); As(200); Au(0.05); Bi(10); Cd(20); Mo(5) except 5001, S059, F045, and G018, which are reported respectively as 5, 5, 10, and <5; Sb(100); Sn(10); Th(100)1,,W450-,

Quartz veins.--Elements looked for but not found, and their lower limits of determination, in ppm (value in parentheses): Ag(0.5); As(200); Au(0.05); Bi(10); Cd(20); Mo(5); Nb(20); Sb(100); Sn(10); Sr(100); Th(100); W(50). Slate.--Elements looked for but not found, except as noted, and their lower limits of determination, in ppm (value in parentheses): Ag(0.5); As(200) except 5011 which is reported as 500; Au(0.05); Bi(10); Cd(20); Mo(5) except F069 and G004 which are reported respectively as 7 and <5; Nb(20) except K006, K050, S011, and S084 which are reported as <20, and S148 which is reported as 20; Sb(100); Sn(10); Th(100); W(50). Conglomerate-sandstone-siltstone.--Elements looked for but not found, except as noted, and their lower limits of determination, in ppm (value in parentheses): Ag(0.5); As(200); Au(0.05); Bi(10); Cd(20); Mo(5); Sb(100); Sn(10); Th(100); W(50).

References cited Grimes, D.J., and Marranzino, A.P., 1968, Direct-current arc and alternating-current spark emission spectrographic field methods for the semiquantitative analysis of geologic materials: U.S. Geological Survey Circular 591, 6 p. Motooka, J.M., and Grimes, D.J., 1976, Analytical precision of onesixth order semiquantitative spectrographic analyses: U.S. Geoloigcal Survey Circular 738, 25 p. Slack, J.F., Gazdik, G.C., and Dunn, M.L„ Jr., 1979, Mineral resources of the Big Frog Wilderness Study Area, Polk County, Tennessee, and Fannin County, Georgia: U.S. Geological Survey Open-File Report OF 79-1209, 39 p. Ward, F. N., Nakagawa, H. M., Harms, T. F., and Van Sickle, G. H., 1969, Atomic absorption methods of analysis useful in geochemical exploration: U. S. Geological Survey Bulletin 1289, 45 p.

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iample X-LOOND Y-COORD S-fEX S-M6% S-CA% S-11% 1-MN S-8 S-8A S-HE S-CO 5- CR S-LU S-LA S-NI 725,210 3,879,81(1 .0/ 2(1

<20 723,690 3,878,100 31) F059 723,630 3,877,100 /0 51) 723,700 5,877,520 3.1) /23,080 3,877,090 .0/

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125,860 3,8/8,140 ./ sample S-Pb S-SC S-SR S-V S-Y S-/R AA-/N-P ZO , 5 101) 51) 1U0 Slates NW of the 6reenbriar Fault sample x-COORD Y-COORO S-FEX S-MG% S-CA% S-11X S-MN S-8 S-8A S -tiE S-CR S-CU S-LA S-MO /24,560 3,878,950 1,500 1U /24,340 5,8/9,400 1,500 124,460 5,879,600 .0/ 1,000 N /24,200 3,8/8,930 30U 1,000 1U N 123,191) 3,8/8,650 1,000

N /23,2/0 5,871,440 / 30U /0 IU N 61)26 724,850 5,879,700 1,000 K050 725,520 3,8/6,900

sample S-NI S-PU S-St S-SR S-V S-Y S-/R AA-/N-P F005 SO /0 21) /0 / 10(1 I I) SO S 5(1 F055 31) 21) /0 21)1) K050 2(1 /0

SamPle X-(OORD Y-COORD 5.1"elmtwors, S-FEZ Sttesto”ts, S-81Z S-CA% S-lIZ S-MN S-H .1 t S-RA 5-HF s-(0 S-CR S-CU S-LA S-MO 727,410 3,877,500 N 725,690 3,879.580 1.n <20 N 726,000 3,879,730 1,000 N 1(117 725,950 3,879,690 1,000 N 723,910 3,877,050 /.0 1,500 2.(l 724,910 5,87/,Q60 1,000 Ion N 724,590 5,878,520 /0 2,000 N 1(165 725,130 5,8/6,180 N 124,630 3,876,100 725,260 5,875,780 (.05 loo 1,000 N 725,290 3.876,130 1,000 N 5,8/6,730 7(1 N 726,850 3,877,740 1,000 1(1 so 725,870 5,876,520 .3(1 so N 725,800 5,876,460 1,000 31) N 725,710 5,8/9,710 1(1 /0 N 725,920 5,8/8,810 151) 2.1) N G030 5,877,530 S.0 1,000 61)51 724,180 5,877,540 1(10 1,500 N 724,570 5,877,120 MO SO 1,000 SO N 711,9/0 5.876.730 Inn son SO N -g- K009 726,120 3,878,140 3.1) sn N K019 3,874,680 1,00n Ion N K046 724,080 3,876,050 15(1 N 726,540 1,876,350 10o 1,000 SO S 725,610 5,875,800 N N

N Sos6 /27,070 3.878,840 2,000 So

726,640 1,878,270 1,500

SO t4 S045 726,440 1,879,150 N 118,800 3,876,650 S.0 N 728,070 3,8 76,470 ).0 5n In N S067 727,130 1,876,190 1,000 SO N 507? 727,700 3,874,140 1,500 1,000 Inn /n 101) N S078 777,030 3,8/4,610 1,500 7(1 N S045 775,460 1,8/8,150 1,000 7.n 1', 101) N S088 775,820 5,871,810 1,00n N S098 725,460 5,877,730 5.n ?on 1,500 725,'150 1,877,320 son N N (25,020 5,877,580 1,000 ?() N 725,550 1,877,160 .2n lsn 5n 2(1 N /21.'50 5,875,050 20n Inn 1,500 2.1) 1n Si 1 2 /27,010 3,8/5,780 1,000

sample S-NO S-NI S-PO S-SC S-SR S-V S-Y S-ZN S-211 AA-IN-P N N N N N N 11)17 N N N 1(151 N N N N N N N N N

N N N N N G001 N N N <10 N G007 N G024 N '- 20 N G025 N N G030 N <10 N G031 N N G032 N 21) N J001 <20 N K009 N K019 <20 N K046 <20 N N N N N N S041 N N S045 N N N S054 N N S056 N N N N N SO N <20 N S085 N N S088 N N S098 N N 51(11 <20

N N /0 N N So N S127 N S13? N <10 N

GA LA LM LA GM 4,1 LA LA LA Pr C' 0 0 .n ...m .r, on co, cn fon ton GM CM GA cr, X G-

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C C,C,,C, OCOL,' ..q L.,,C, C CC=CC COCCC CCCCC '.. 'l ..., CC:CC= COOCC CC=CC C

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