Geologic Cross Sections Showing the Concentrations of 

As, Cd, Co, Cu, Cr, Fe, Mo, Ni, Pb, and Zn in Acid-Insoluble 

Residues of Paleozoic Rocks within the Doniphan/Eleven 

Point Ranger District of the Mark Twain National Forest, 

Missouri, USA.

U.S. Geological Survey Open File Report 02-55

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

Gale A. Norton, Secretary

U.S. Geological Survey

Charles G. Groat, Director

For sale by U.S. Geological Survey, Information Services

Box 25286, Denver Federal Center

Denver, CO 80225

For more information about the USGS and its products:

Telephone: 1-888-ASK-USGS

World Wide Web: http://www.usgs.gov/

This publication is also available online at:

http://geology.cr.usgs.gov/

Any use of trade, product, or firm names in this publication

is for descriptive purposes only and does not

imply endorsement by the U.S. Government
III

Contents

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

Description of the Dataset .......................................................................................................................... 1

Data Compilation Procedures..................................................................................................................... 1

Cross Sections Showing the Down-Hole Distribution of Metals.......................................................... 2

References Cited .......................................................................................................................................... 2

Figures

1. The location of boreholes and orientation of cross sections A-A’ and B-B’ ...................... 4

2. Cross section A-A’ showing the down-hole distributions of iron......................................... 5

3. Cross section A-A’ showing the down-hole distributions of arsenic................................... 6

4. Cross section A-A’ showing the down-hole distributions of cadmium................................ 7

5. Cross section A-A’ showing the down-hole distributions of cobalt..................................... 8

6. Cross section A-A’ showing the down-hole distributions of chromium.............................. 9

7. Cross section A-A’ showing the down-hole distributions of copper ................................. 10

8. Cross section A-A’ showing the down-hole distributions of molybdenum....................... 11

9. Cross section A-A’ showing the down-hole distributions of nickel ................................... 12

10. Cross section A-A’ showing the down-hole distributions of lead ...................................... 13

11. Cross section A-A’ showing the down-hole distributions of zinc....................................... 14

12. Cross section B-B’ showing the down-hole distributions of iron....................................... 15

13. Cross section B-B’ showing the down-hole distributions of arsenic ................................ 16

14. Cross section B-B’ showing the down-hole distributions of cadmium ............................. 17

15. Cross section B-B’ showing the down-hole distributions of cobalt .................................. 18

16. Cross section B-B’ showing the down-hole distributions of chromium............................ 19

17. Cross section B-B’ showing the down-hole distributions of copper................................. 20

18. Cross section B-B’ showing the down-hole distributions of molybdenum....................... 21

19. Cross section B-B’ showing the down-hole distributions of nickel................................... 22

20. Cross section B-B’ showing the down-hole distributions of lead...................................... 23

21. Cross section B-B’ showing the down-hole distributions of zinc ...................................... 24

Tables

1. Generalized stratigraphic section of the Ozark Plateaus region.......................................... 3
Geologic Cross Sections Showing the Concentrations of 

As, Cd, Co, Cu, Cr, Fe, Mo, Ni, Pb, and Zn in Acid-Insoluble 

Residues of Paleozoic Rocks within the Doniphan/Eleven 

Point Ranger District of the Mark Twain National Forest, 

Missouri, USA.

By Lopaka Lee and Martin B. Goldhaber

Introduction

This report is a product of a U.S. Geological 

Survey investigation that is focused on characterizing the 

potential environmental impacts of lead-zinc mining within 

the Doniphan/Eleven Point ranger district of the Mark Twain 

national forest. The elemental concentrations of iron (Fe), 

arsenic (As), cadmium (Cd), cobalt (Co), copper (Cu), chromium (Cr), nickel (Ni), lead (Pb), and zinc (Zn) in acidinsoluble residues are shown for boreholes along two geologic 

cross sections within Doniphan/Elevan Point ranger district 

(Figure 1). 

The purpose of this report is to characterize, in a general 

sense, the distribution of economically and environmentally 

important elements within the rocks and aquifers of the 

Doniphan/Eleven Point ranger district. 

Other related open-file reports include: The distribution 

of MVT-related metals in acid-insoluble residues of Paleozoic 

rocks of the Ozark Plateaus region of the United States (Lee 

and Goldhaber, 2001a), and The distribution of dissolved MVTrelated metals in ground-water of the Ozark Plateaus region of 

the United States (Lee and Goldhaber, 2001b). 

Description of the Dataset

The cross sections of figures X through X summarize the 

metal content of 1,123 acid-insoluble residues of rock samples 

from 9 boreholes within the Doniphan/Eleven Point ranger 

district. These samples were collected and analyzed as part of 

the U.S.G.S Conterminous U.S. Mineral Assessment Program 

(CUSMAP) of the Ozark region (Erickson and others, 1978a, 

1978b, 1981, 1985, 1988a, 1988b, 1990, 1991, Martin and 

Pratt, 1991). This program evaluated the mineral resource 

potential of selected 1x2 degree quadrangles within the 

Ozarks. The CUSMAP project identified areas with a high 

potential for Mississippi Valley Type (MVT) ore deposits 

by analyzing and mapping the concentrations of metals in 

acid(HCl)-insoluble residues of borehole rock samples. The 

acid-insoluble residues of Ozark rocks predominately contain 

metal sulfides such as pyrite ( FeS2 ), sphalerite ( ZnS ), 

and galena ( PbS ) (Erickson and others, 1981). These metal 

sulfides also contain trace amounts of other metals within their 

structure, such as As, Cd, Co, Cr, Cu, Mo, and Ni ( Ericskson 

and others, 1981, Hagni, 1983 ).

The rock samples from which the acid-insoluble residues 

were derived are representative composites of borehole intervals. In most cases, samples are representative composites of 

each 10ft of borehole. However, some samples are composites 

of larger intervals. 

Semi-quantitative direct current arc emission spectrometer analyses were used to determine concentrations of 32 

elements in the acid insoluble residues of rock samples using 

a method described by Grimes and Marranzino (1968). This 

technique reports elemental concentrations in six steps per 

order of magnitude ( The upper limits each step for each order 

of magnitude being: 0.15, 0.2, 0.3, 0.5, 0.7, 1). The precision 

of chemical determinations is within two steps of the reported 

value 96 percent of the time.

Data Compilation Procedures

The data of this report was compiled from the USGS 

National Geochemical Database. The dataset was checked 

for both positional, geologic, and analytical errors. Latitudes, 

longitudes, and geologic formation information were checked 

against maps and paper records of borehole logs on file at the 

USGS Denver office and the Missouri Department of Natural 

Resources, Rolla Missouri. The reported analytical results 

were compared to the original paper lab reports on file at the 

1
2 U.S. Geological Survey Open File Report 02-55

USGS Denver office. 

Nine MVT-related metals were chosen for investigation: 

iron (Fe), arsenic (As), cadmium (Cd), chromium (Cr), cobalt 

(Co), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn). These 

elements were chosen because: (1) elevated concentrations of 

these metals are associated with MVT mineralization, and can 

therefore indicate the presence of MVT sulfides; and (2) each 

has important economic and environmental significance.

Cross Sections Showing the DownHole Distribution Of Metals

Figure 1 shows the location and orientation of the cross 

sections A-A’ and B-B’ within the Doniphan/Eleven Point 

ranger district. Table 1 shows a generalized stratigraphic section of the Ozark region. The shaded formations of Table 1 

are the formations that are represented within the boreholes of 

A-A’ and B-B’.

Figures 1 through X show the down-hole distribution of 

metals along cross sections A-A’ and B-B’. The cross sections 

are “strip logs” that show the down-hole concentration of elements and formation boundaries. Elemental concentrations are 

shown as a down-hole bar chart – the horizontal length of 

bars is proportional to elemental concentration and the vertical 

thickness of the bars correspond to the total interval that was 

composited for each sample. All cross sections use the Bonneterre Formation as a reference horizon; the displayed vertical 

units of the cross sections are feet relative to the top of the 

formation. 

References Cited

Erickson R. L., Mosier E. L., and Viets J. G. (1978a) Generalized 

geologic and summary geochemical maps of the Rolla 1 x 2 degree 

quadrangle, Missouri. U. S. Geological Survey Miscellaneous Field 

Studies Map MF- 1004-A (1 sheet).

Erickson R. L., Mosier E. L., and Viets J. G. (1978b) Lithogeochemical 

studies in Missouri. In U. S. Geological Survey Professional Paper 

1044-9612, p. 9.

Erickson R. L., Mosier E. L., Odland S. K., and Erickson M. S. (1981) 

A favorable belt for possible mineral discovery in the subsurface 

Cambrian rocks in southern Missouri. Economic Geology 76, 

921-933.

Erickson R. L., Erickson M. S., Mosier E. L., and Chazin B. 

(1985) Summary geochemical generalized geologic maps of the 

Springfield 1 x 2 degree Quadrangle and adjacent area, Missouri. U. 

S. Geological Survey Miscellaneous Field Studies Map MF-1830-A 

(2 sheets).

Erickson R. L., Chazin B., and Erickson M. S. (1988a) Summary 

geochemical maps of the Harrison 1 x 2 degree Quadrangle, 

Arkansas and Missouri. U. S. Geological Survey Miscellaneous 

Field Studies Map MF-1994-A (3 sheets).

Erickson R. L., Chazin B., Erickson M. S., Mosier E. L., and Whitney H. 

A. (1988b) Tectonic and stratigraphic control of regional subsurface 

geochemical patterns, Midcontinent, U.S.A. In North America 

conference on Tectonic control of ore deposits and the vertical and 

horizontal extent of ore systems (ed. G. Kisvarsanyi and S. K. Grant), 

pp. 435-446.

Erickson R. L., Mosier E. L., Folger H. W., Bullock J. H., Jr., Berendsen 

P., and Daly M. (1990) Summary geochemical maps of the Joplin 

1 x 2 degree Quadrangle, Kansas and Missouri. U. S. Geological 

Survey Miscellaneous Field Studies Map MF-2125-A (1 sheet).

Erickson R. L. and Chazin B. (1991) Resource assessment for 

Mississippi Valley-type base-metal deposits. In Geology and 

mineral-resource assessment of the Springfield 1 X 2 degree 

Quadrangle, Missouri, as appraised in September 1985: U. S. 

Geological Survey Bulletin 1942 (ed. J. A. Martin and W. P. Pratt), 

pp. 90-94.

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.

Hagni R. D. (1983) Minor elements in Mississippi valley-type ore 

deposits. In Cameron symposium on unconventional mineral 

deposits ( ed. W.C. Shanks, III ), pp. 71-88.

Lee, L. and Goldhaber, M.B. (2001a) The distribution of MVT-related 

metals in acid-insoluble residues of Paleozoic rocks of the Ozark 

Plateaus region of the United States. U.S. Geological Survey 

Open File Report 01-0042. (http://greenwood.cr.usgs.gov/pub/openfile-reports/ofr-01-0042/)

Lee, L. and Goldhaber, M.B. (2001b) The distribution of dissolved MVTrelated metals in ground-water of the Ozark Plateaus region of the 

United States. U.S. Geological Survey Open File Report 01-171. 

(http://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-01-0171/)

Martin J. A. and Pratt W. P. (1991) Geology and mineral-resource 

assessment of the Springfield 1x2 degree quadrangle, Missouri, as 

appraised in September 1985: U. S. Geological Survey Bulletin 1942.
U.S. Geological Survey Open File Report 02-55 

3

Generalized stratigraphic section of the Ozark Plateaus region. Shaded area show the formations

Geologic Age Geologic Formation Hydrologic Unit Hydrologic System

Pennsylvanian Pennsylvanian, undifferentiated Western Interior Plains confining units Western Interior Plains confining system

Keokuk-burlington Limestones, undiff.Elsey Formation Warsaw Formation

Mississippian Boone Formation Springfield Plateau aquifer unit

Fern Glen LimestoneReeds Spring LimestonePierson Formation

Grand Falls FormationNorth View ShaleCompton Formation Ozark confining unitChattanooga ShaleSt. Peter SandstoneEverton FormationPowell Dolomite Ozark aquifer systemCotter Dolomite

Ordovician Cotter-Jefferson City Dolomites, undiff.

Jefferson City DolomiteRoubidoux Formation Ozark aquifer unitGasconade DolomiteGunter SandstoneEminence DolomitePotosi Dolomite

Cambrian Derby-Doerun Formation

Davis Shale St. Francois confining unit

Bonneterre-Davis undifferentiatedBonneterre Formation St. Francois aquifer unitLamotte Sandstone

Precambrian Precambrian, undifferentiated Precambrian confining unit Table 1. present in boreholes A-A’ and B-B’.
4 U.S. Geological Survey Open File Report 02-55

Oregon

Ripely

Shannon

Carter

Big Barren Creek

Pike Creek

Current River

Hurricane Creek

>

>

>

>

>

>

>

>

>

DH1

PB9

PB1 PB3

DH8

DH73

DH22

A

A'

B

B'

PB2

Eleven Point River

PB5

91 ̊28'1"W 91 ̊12'1"W 90 ̊56'1"W

36 ̊31'59"N

36 ̊47'59"N

37 ̊3'59"N

Missouri

Arkansas

Spring Creek

Map Area

0 10 Miles

>PB3

EXPLANATION

Prospecting Area

Borehole and Identification Number

Doniphan/Eleven Point Ranger

District of the Mark Twain National Forest

Figure 1. The location of boreholes and orientation of the cross sections A-A’ and B-B’ within the 

Doniphan/Eleven Point ranger district.
U.S. Geological Survey Open File Report 02-55 5

Fe(0-20%)

Fe(0-20%)

Fe(0-20%)

Fe(0-20%)

Fe(0-20%)

Fe(0-20%)

DH1

DH22

Eminence otosi P DDR vis Da Bonneterre 

GNTR

0

1,000 Elevation relative to top of Bonneterre (ft)

Gasconade otosi P DDR vis Da Bonneterre 

GNTR

PB2 PB3

PB5

PB9

otosi P DDR Bonneterre 

vis Da

Bonneterre 

Bonneterre 

Bonneterre 

otosi P

otosi P DDR 

DDR vis Da

vis Da

Davis

Lamotte 

Gasconade

Eminence 

A A'

DolomiteShaleSandstoneFormation boundary (dashed where approximate or inferred)

Explanation

Cross section A-A’ (see Figure 1) showing the down-hole distribution of iron in acid-insoluble Figure 2.

residues of bore-hole rock samples.
6 U.S. Geological Survey Open File Report 02-55 residues of bore-hole rock samples. Figure 3. Cross section A-A’ (see Figure 1) showing the down-hole distribution of arsenic in acid-insoluble 

As(0-5000ppm)

As(0-5000ppm)

As(0-5000ppm)

As(0-5000ppm)

As(0-5000ppm)

As(0-5000ppm)

DH1

DH22

Bonneterre Davis DDR Potosi Eminence 

GNTR

0

Elevation relative to top of Bonneterre (ft)

1,000

Bonneterre Davis DDR Potosi Gasconade

GNTR

PB2 PB3

PB5

PB9

Bonneterre DDR Potosi 

Davis 

Bonneterre 

Bonneterre 

Bonneterre 

Potosi 

DDR Potosi 

Davis DDR 

Davis 

Davis

Lamotte 

Gasconade

Eminence 

A A'

ShalDolomite

e

(dashed where approximate or inferred)Formation boundary Sandstone

Explanation
U.S. Geological Survey Open File Report 02-55 7

Cd(0-700ppm)

1,0000

Cd(0-700ppm)

Cd(0-700ppm)

Cd(0-700ppm) Cd(0-700ppm)

Cd(0-700ppm)

DH1

DH22

Eminence otosi P DDR vis Da Bonneterre 

GNTR

0

1,000 Elevation relative to top of Bonneterre (ft)

Gasconade otosi P DDR vis Da Bonneterre 

GNTR

PB2 PB3

PB5

PB9

otosi P DDR Bonneterre 

vis Da

Bonneterre 

Bonneterre 

Bonneterre 

otosi P

otosi P DDR 

DDR vis Da

vis Da

Davis

Lamotte 

Gasconade

Eminence 

A A'

DolomiteShaleSandstoneFormation boundary (dashed where approximate or inferred)

Explanation

Cross section A-A’ (see Figure 1) showing the down-hole distribution of cadmium in acid-insoluble Figure 4.

residues of bore-hole rock samples.
8 U.S. Geological Survey Open File Report 02-55 residues of bore-hole rock samples. Figure 5. Cross section A-A’ (see Figure 1) showing the down-hole distribution of cobalt in acid-insoluble 

Co(0-100ppm)

Co(0-100ppm)

Co(0-100ppm)

Co(0-100ppm) Co(0-100ppm)

Co(0-100ppm)

DH1

DH22

Bonneterre Davis DDR Potosi Eminence 

GNTR

0

Elevation relative to top of Bonneterre (ft)

1,000

Bonneterre Davis DDR Potosi Gasconade

GNTR

PB2 PB3

PB5

PB9

Bonneterre DDR Potosi 

Davis 

Bonneterre 

Bonneterre 

Bonneterre 

Potosi 

DDR Potosi 

Davis DDR 

Davis 

Davis

Lamotte 

Gasconade

Eminence 

A A'

ShalDolomite

e

(dashed where approximate or inferred)Formation boundary Sandstone

Explanation
U.S. Geological Survey Open File Report 02-55 9

Cr(0-300ppm)

Cr(0-300ppm)

Cr(0-300ppm)

Cr(0-300ppm) Cr(0-300ppm)

Cr(0-300ppm)

DH1

DH22

Eminence otosi P DDR vis Da Bonneterre 

GNTR

0

1,000 Elevation relative to top of Bonneterre (ft)

Gasconade otosi P DDR vis Da Bonneterre 

GNTR

PB2 PB3

PB5

PB9

otosi P DDR Bonneterre 

vis Da

Bonneterre 

Bonneterre 

Bonneterre 

otosi P

otosi P DDR 

DDR vis Da

vis Da

Davis

Lamotte 

Gasconade

Eminence 

A A'

DolomiteShaleSandstoneFormation boundary (dashed where approximate or inferred)

Explanation

Cross section A-A’ (see Figure 1) showing the down-hole distribution of chromium in acid-insoluble Figure 6.

residues of bore-hole rock samples.
10 U.S. Geological Survey Open File Report 02-55 residues of bore-hole rock samples. Figure 7. Cross section A-A’ (see Figure 1) showing the down-hole distribution of copper in acid-insoluble 

Cu(0-500ppm)

371BNTR

Cu(0-500ppm)

Cu(0-500ppm)

Cu(0-500ppm)

Cu(0-500ppm)

Cu(0-500ppm)

DH1

DH22

Bonneterre Davis DDR Potosi Eminence 

GNTR

0

Elevation relative to top of Bonneterre (ft)

1,000

Bonneterre Davis DDR Potosi Gasconade

GNTR

PB2 PB3

PB5

PB9

Bonneterre DDR Potosi 

Davis 

Bonneterre 

Bonneterre 

Bonneterre 

Potosi 

DDR Potosi 

Davis DDR 

Davis 

Davis

Lamotte 

Gasconade

Eminence 

A A'

ShalDolomite

e

(dashed where approximate or inferred)Formation boundary Sandstone

Explanation
U.S. Geological Survey Open File Report 02-55 11

Mo(0-1000ppm)

Mo(0-1000ppm)

Mo(0-1000ppm)

Mo(0-1000ppm) Mo(0-1000ppm)

Mo(0-1000ppm)

DH1

DH22

Eminence otosi P DDR vis Da Bonneterre 

GNTR

0

1,000 Elevation relative to top of Bonneterre (ft)

Gasconade otosi P DDR vis Da Bonneterre 

GNTR

PB2 PB3

PB5

PB9

otosi P DDR Bonneterre 

vis Da

Bonneterre 

Bonneterre 

Bonneterre 

otosi P

otosi P DDR 

DDR vis Da

vis Da

Davis

Lamotte 

Gasconade

Eminence 

A A'

DolomiteShaleSandstoneFormation boundary (dashed where approximate or inferred)

Explanation

Cross section A-A’ (see Figure 1) showing the down-hole distribution of molybdenum in acid-insoluble Figure 8.

residues of bore-hole rock samples.
12 U.S. Geological Survey Open File Report 02-55 residues of bore-hole rock samples. Figure 9. Cross section A-A’ (see Figure 1) showing the down-hole distribution of nickel in acid-insoluble 

Ni(0-200ppm)

Ni(0-200ppm)

Ni(0-200ppm)

Ni(0-200ppm)

Ni(0-200ppm)

Ni(0-200ppm)

DH1

DH22

Bonneterre Davis DDR Potosi Eminence 

GNTR

0

Elevation relative to top of Bonneterre (ft)

1,000

Bonneterre Davis DDR Potosi Gasconade

GNTR

PB2 PB3

PB5

PB9

Bonneterre DDR Potosi 

Davis 

Bonneterre 

Bonneterre 

Bonneterre 

Potosi 

DDR Potosi 

Davis DDR 

Davis 

Davis

Lamotte 

Gasconade

Eminence 

A A'

ShalDolomite

e

(dashed where approximate or inferred)Formation boundary Sandstone

Explanation
U.S. Geological Survey Open File Report 02-55 13

Pb(0-2000ppm)

Pb(0-2000ppm)

Pb(0-2000ppm)

Pb(0-2000ppm) Pb(0-2000ppm)

Pb(0-2000ppm)

DH1

DH22

Eminence otosi P DDR vis Da Bonneterre 

GNTR

0

1,000 Elevation relative to top of Bonneterre (ft)

Gasconade otosi P DDR vis Da Bonneterre 

GNTR

PB2 PB3

PB5

PB9

otosi P DDR Bonneterre 

vis Da

Bonneterre 

Bonneterre 

Bonneterre 

otosi P

otosi P DDR 

DDR vis Da

vis Da

Davis

Lamotte 

Gasconade

Eminence 

A A'

DolomiteShaleSandstoneFormation boundary (dashed where approximate or inferred)

Explanation

Cross section A-A’ (see Figure 1) showing the down-hole distribution of lead in acid-insoluble Figure 10.

residues of bore-hole rock samples.
14 U.S. Geological Survey Open File Report 02-55 residues of bore-hole rock samples. Figure 11. Cross section A-A’ (see Figure 1) showing the down-hole distribution of zinc in acid-insoluble 

Zn(0-15000ppm)

Zn(0-15000ppm)

Zn(0-15000ppm)

Zn(0-15000ppm) Zn(0-15000ppm)

Zn(0-15000ppm)

DH1

DH22

Bonneterre Davis DDR Potosi Eminence 

GNTR

0

Elevation relative to top of Bonneterre (ft)

1,000

Bonneterre Davis DDR Potosi Gasconade

GNTR

PB2 PB3

PB5

PB9

Bonneterre DDR Potosi 

Davis 

Bonneterre 

Bonneterre 

Bonneterre 

Potosi 

DDR Potosi 

Davis DDR 

Davis 

Davis

Lamotte 

Gasconade

Eminence 

A A'

ShalDolomite

e

(dashed where approximate or inferred)Formation boundary Sandstone

Explanation
U.S. Geological Survey Open File Report 02-55 15

Fe(0-20%)

Fe(0-20%)

Fe(0-20%)

Fe(0-20%)

-500

0

500

1,000

PB1

PB9

DH73

DH8

Elevation relative to top of Bonneterre (ft)

vis Da Bonneterre 

vis Da

vis Da

vis Da

Bonneterre 

Bonneterre 

Bonneterre 

DDR 

DDR 

DDR 

otosi P

Eminence otosi P

GNTR

GSCD

B B'

DolomiteShaleSandstoneFormation boundary (dashed where approximate or inferred)

Explanation

Cross section B-B’ (see Figure 1) showing the down-hole distribution of iron in acid-insoluble Figure 12.

residues of bore-hole rock samples.
16 U.S. Geological Survey Open File Report 02-55 residues of bore-hole rock samples. Cross section B-B’ (see Figure 1) showing the down-hole distribution of arsenic in acid-insoluble Figure 13.

As(0-5000ppm)

As(0-5000ppm)

As(0-5000ppm)

As(0-5000ppm)

-500

0

500

1,000

PB1

PB9

DH73

DH8

Elevation relative to top of Bonneterre (ft)

Bonneterre Davis 

Davis 

Davis 

Davis 

Bonneterre 

Bonneterre 

Bonneterre 

DDR 

DDR 

DDR 

Potosi 

Potosi Eminence 

GSCD

GNTR

B B'

ShalDolomite

e

(dashed where approximate or inferred)Formation boundary Sandstone

Explanation
U.S. Geological Survey Open File Report 02-55 17

Cd(0-700ppm)

Cd(0-700ppm)

Cd(0-700ppm)

Cd(0-700ppm)

-500

0

500

1,000

PB1

PB9

DH73

DH8

Elevation relative to top of Bonneterre (ft)

vis Da Bonneterre 

vis Da

vis Da

vis Da

Bonneterre 

Bonneterre 

Bonneterre 

DDR 

DDR 

DDR 

otosi P

Eminence otosi P

GNTR

GSCD

B B'

DolomiteShaleSandstoneFormation boundary (dashed where approximate or inferred)

Explanation

Cross section B-B’ (see Figure 1) showing the down-hole distribution of cadmium in acid-insoluble Figure 14.

residues of bore-hole rock samples.
18 U.S. Geological Survey Open File Report 02-55 residues of bore-hole rock samples. Cross section B-B’ (see Figure 1) showing the down-hole distribution of cobalt in acid-insoluble Figure 15.

Co(0-700ppm)

Co(0-700ppm)

Co(0-700ppm)

Co(0-700ppm)

-500

0

500

1,000

PB1

PB9

DH73

DH8

Elevation relative to top of Bonneterre (ft)

Bonneterre Davis 

Davis 

Davis 

Davis 

Bonneterre 

Bonneterre 

Bonneterre 

DDR 

DDR 

DDR 

Potosi 

Potosi Eminence 

GSCD

GNTR

B B'

ShalDolomite

e

(dashed where approximate or inferred)Formation boundary Sandstone

Explanation
U.S. Geological Survey Open File Report 02-55 19

Cr(0-300ppm)

Cr(0-300ppm)

Cr(0-300ppm)

Cr(0-300ppm)

-500

0

500

1,000

PB1

PB9

DH73

DH8

Elevation relative to top of Bonneterre (ft)

vis Da Bonneterre 

vis Da

vis Da

vis Da

Bonneterre 

Bonneterre 

Bonneterre 

DDR 

DDR 

DDR 

otosi P

Eminence otosi P

GNTR

GSCD

B B'

DolomiteShaleSandstoneFormation boundary (dashed where approximate or inferred)

Explanation

Cross section B-B’ (see Figure 1) showing the down-hole distribution of chromium in acid-insoluble Figure 16.

residues of bore-hole rock samples.
20 U.S. Geological Survey Open File Report 02-55 residues of bore-hole rock samples. Cross section B-B’ (see Figure 1) showing the down-hole distribution of copper in acid-insoluble Figure 17.

Cu(0-500ppm)

Cu(0-500ppm)

Cu(0-500ppm)

Cu(0-500ppm)

-500

0

500

1,000

PB1

PB9

DH73

DH8

Elevation relative to top of Bonneterre (ft)

Bonneterre Davis 

Davis 

Davis 

Davis 

Bonneterre 

Bonneterre 

Bonneterre 

DDR 

DDR 

DDR 

Potosi 

Potosi Eminence 

GSCD

GNTR

B B'

ShalDolomite

e

(dashed where approximate or inferred)Formation boundary Sandstone

Explanation
U.S. Geological Survey Open File Report 02-55 21

Mo(0-200ppm)

Mo(0-200ppm)

Mo(0-200ppm)

Mo(0-200ppm)

-500

0

500

1,000

PB1

PB9

DH73

DH8

Elevation relative to top of Bonneterre (ft)

vis Da Bonneterre 

vis Da

vis Da

vis Da

Bonneterre 

Bonneterre 

Bonneterre 

DDR 

DDR 

DDR 

otosi P

Eminence otosi P

GNTR

GSCD

B B'

DolomiteShaleSandstoneFormation boundary (dashed where approximate or inferred)

Explanation

Cross section B-B’ (see Figure 1) showing the down-hole distribution of molybdenum in acid-insoluble Figure 18.

residues of bore-hole rock samples.
22 U.S. Geological Survey Open File Report 02-55 residues of bore-hole rock samples. Cross section B-B’ (see Figure 1) showing the down-hole distribution of nickel in acid-insoluble Figure 19.

Ni(0-500ppm)

Ni(0-500ppm)

Ni(0-500ppm)

Ni(0-500ppm)

-500

0

500

1,000

PB1

PB9

DH73

DH8

Elevation relative to top of Bonneterre (ft)

Bonneterre Davis 

Davis 

Davis 

Davis 

Bonneterre 

Bonneterre 

Bonneterre 

DDR 

DDR 

DDR 

Potosi 

Potosi Eminence 

GSCD

GNTR

B B'

ShalDolomite

e

(dashed where approximate or inferred)Formation boundary Sandstone

Explanation
U.S. Geological Survey Open File Report 02-55 23

Pb(0-1000ppm)

Pb(0-1000ppm)

Pb(0-1000ppm)

Pb(0-1000ppm)

-500

0

500

1,000

PB1

PB9

DH73

DH8

Elevation relative to top of Bonneterre (ft)

vis Da Bonneterre 

vis Da

vis Da

vis Da

Bonneterre 

Bonneterre 

Bonneterre 

DDR 

DDR 

DDR 

otosi P

Eminence otosi P

GNTR

GSCD

B B'

DolomiteShaleSandstoneFormation boundary (dashed where approximate or inferred)

Explanation

Cross section B-B’ (see Figure 1) showing the down-hole distribution of lead in acid-insoluble Figure 20.

residues of bore-hole rock samples.
24 U.S. Geological Survey Open File Report 02-55 residues of bore-hole rock samples. Cross section B-B’ (see Figure 1) showing the down-hole distribution of zinc in acid-insoluble Figure 21.

Zn(0-15000ppm)

Zn(0-15000ppm)

Zn(0-15000ppm)

Zn(0-15000ppm)

-500

0

500

1,000

PB1

PB9

DH73

DH8

Elevation relative to top of Bonneterre (ft)

Bonneterre Davis 

Davis 

Davis 

Davis 

Bonneterre 

Bonneterre 

Bonneterre 

DDR 

DDR 

DDR 

Potosi 

Potosi Eminence 

GSCD

GNTR

B B'

ShalDolomite

e

(dashed where approximate or inferred)Formation boundary Sandstone

Explanation