1200

1100

1000

900

1700

1600

1500

1400

1900

1300

1200

1100

1500

1000

1900

1700

2000

1900

2900

2800

2400

2300

2200

2100

3000

2900

2800

2700

2600

2500

2400

2100

2200

2300

2700

3500

3400

3300

3200

3100

3000

2800

2700

2600

2900

3000

3200

3300

3400

3200

3100

3000

2900

2800

2700

2400

2300

2200

2100

2500

2400

2200

2100

2000

1900

1800

1800

1900

2000

1500

2000

1800

1900

1100

1200

1300

800

800

1700

1600

1400

1800

1900

1700

900

1100

1000

1000

900

1000

1100

1200

1300

1800

2000

1100

1200

1300

1400

1200

1100

1000

3700

11000XS

11000XS

10000XS

10000XS

9000XS

9000XS

9000XS

4800 LS

6000XS

7000XS

8000XS

8000XS

6000XS

5000LS

5000LS

6000LS

6000LS

7000LS

7000LS

8000LS

8000LS

4000XS

4000XS

3000XS

3000XS

2000XS

2000XS

1000XS

1000XS

4800 LONG SECTION

4800 LS

0000LS

0000LS

1000LS

1000LS

2000LS

2000LS

3000LS

3000LS

5000XS

5000XS

4000LS

4000LS

00XS

00XS

7000XS 

8000XS 

4800 LONG SECTION

CROSS-SECTION LINE FOR PLATE 7–2B

CROSS-SECTION LINE FOR PLATE 7–2A

CROSS-SECTION LINE FOR PLATE 7–2B

CROSS-SECTION LINE FOR PLATE 7–2A

19000E

20000E

21000E

22000E

15000E

16000E

24000N 24000N

23000N 23000N

22000N 22000N

21000N

20000N

19000N

18000N

17000N

16000N

15000N

14000N

16000E17000E

18000E

19000E

20000E

21000E

22000E

23000E

23000E

24000E

24000E

17000N

16000N

15000N

14000N

13000N

21000N

20000N

19000N

18000N

17000E

18000E

2 287 000

FEET

2 495 000

FEET

2 496 000

FEET 2 497 000

FEET

2 498 000

FEET

2 499 000

FEET

2 500 000

FEET

2 501 000

FEET

2 502 000

FEET

2 503 000

FEET

2 286 000

FEET

2 285 000

FEET

2 284 000

FEET

2 283 000

FEET

2 282 000

FEET

2 281 000

FEET

2 280 000

FEET

2 277 000

FEET

2 276 000

FEET

2 494 000

FEET

2 495 000

FEET

2 496 000

FEET

2 497 000

FEET

2 498 000

FEET

2 499 000

FEET

2 500 000

FEET

2 501 000

FEET

2 502 000

FEET

2 503 000

FEET

2 276 000

FEET

2 277 000

FEET

2 278 000

FEET

2 279 000

FEET

2 280 000

FEET

2 281 000

FEET

2 282 000

FEET

2 283 000

FEET

2 284 000

FEET

2 285 000

FEET

2 286 000

FEET

2 287 000

FEET

2 279 000

FEET

2 278 000

FEET

 

58°5’N

134°37’W

58°4’N

134°39’W

58°5’N

134°39’W

58°4’N

134°37’W

134°38’W

58°5’N

58°4’N

134°38’W

q-carbser-phyl

ank-q-serchl-leuc-phyl

Dark gray slate and

graphitic q-ser phyl

w/ q lenses

slatey q-rich

lenses of GSS

lenses of GSS

GSS?

lenses of GSS

SA or

"GSS"?

arg?

GSS or SA?

 (pyritic)

mod-str faulting; 6" gg &

clay, 5' broken zone

str faulting; 2'

clay & breccia

weak gg

str 6" gg

mod-str gg

mod gg

pyritic

ser-q

beds fault healed w/q veins

Thin

gg (healed?)

GSS float

carb bed

silicified, q veined,

locally cherty,

(like 158)

cherty(?) arg

arg: py

veinlets w/

sericitic alteration

overprinted

by S2

Contact @ 780':

graphitic & ser

phyllite (GSS?)

above; arg w/

ladder veins &

anomalous Au,

Zn, Pb, Ag below

Strong F4 folding

of S3 and S2

thin boudined carb bed

probable

landslide

block

non-faulted contact

~parallel to S2

weak,

steep

faults

SSS w/

minor

gray slate

Slump block?

Graphitic slate

and "GSS"

Glacial

deposits?

silicified SA(?)

w/ q veins

pale gray

sericitic phyllite

beds

diss

py

diss py

dark grey slate

SPc: chl-q- py(carb)

SPcb: carb-q- ser-py-leuc

SPcb: carb-q- ser-py-leuc

DG:

deformed

coarse

metagabbro

DG: q-chl & q-carb-chl sch w/ foliated metagabbro relicts

SC(?); w/ py, cp

SP: coarse, q-rich q-musc-py schist

SP: ser-q-py-leuc phyllite

SPc: q-carb-chl-py-(cp) sch/phyllite

pale gray q-rich qsc;

q layers 1–5mm thick;

ser-rich layers 0.1–1mm

thick.

lenses of

q-rich qsc

q-musc-marip-

±carb schist

SPcb: carbq-ser-py-leuc

phyllite w/ 2–5%

py

thinly foliated, pale gray to

greenish gray q-ser (chl?) phyllite,

minor carb, little or no leuc

q-carb-chl sch/phyllite

q-carb-ser phyllite

Maki fault,

projected from

52xc & PS78

Maki fault,

projected from

drill holes

on 44XS

Possible

shear zone

Healed fault

or shear zone

Healed fault or

shear zone just

below contact

ser-qpy, no

carb

?

?

local cherty beds

cherty units

Medium gray

graphitic "SSS"

unit w/ q

veins

minor thin

"SSS" beds

in gray slate

py

SP: ser > q > py phyllite, 5–10% py

deformed q veinlet

stockwork, and py

veinlets

SP w/ 10% py in

lower 5' of outcrop

pale green chl- ser-q-leuc phyllite (SPc)

SPc: dark green chl - carb phyllite

(gradational to CR)

chl-ser-q

phyllite (SPc)

chl-carb-qleuc phyllite

(SPc or CR?)

ser-q-carb

phyllite (SP);

(shear foliated?)

SPc: chl (ser?)

phyllite w/leuc,

minor q & carb;

local ser & py

possible

rotated

blocks?

post-F3

healed

fault

highest carbonate

bed

small

fault

very

small

fault

contains a

few cherty beds

GSS:

partly

cherty

SA w/ thin (1–10 mm),

gray, ser-py beds

small fault

gouges

small thin

fault gouge

location

approximate

?

?

?

?

?

?

white talc>

carb phyllite

q veined carb

w/tr chl, serp

fine grained,

foliated, carb>chl

q-rich

q-rich

serp, talc? Sh35

Sh73

Sh55

Sh62

Sh50

Sh63 Sh65

Sh61

Sh69

Sh90

serp, talc?

89

Strong S3

reorients S2 q-rich

q-rich

PS141

PS140

76

MA>SA

Sh80

Sh30

Sh34

carb serp,

chl-q veins

Sh40

Sh47

2–5% py

q-rich

S3 age shear zone

Sh51 Sh43

Sh58

q veined carb

w/tr chl, serp

serp or talc

phyllite

talc?-carb

phyllite

75

Sh65

Sh57

Sh23 20 carb w/talc or chl

ser-leucpy-chl Sh37

Sh83

~5’ zone of SPt w/ coarse

white carb, vein q, and

stringers of py, sph, gal,

sample JMP RK1

Sh50

Sh75

serp-carb

minor marble

Sh74 carb-serp/

chl-q veins

q-rich

2–5% py

Sh42 Sh73

Sh35

Sh65

Sh55

Sh68

62

L57

Sh57

carb>q>serp 

w/q-carb veins

Sh40

Sh13

Sh38

Sh51

Sh53

Sh57

Sh31

Sh61

Sh36 Sh57

carb phyllite Sh34

±serp, marip

PS47

PS133

PS131

ser>q,

5–10% py

ser>q>carb

PS137

PS138

Angular conglomerate or

breccia. SPg fragments

in graphitic phyllite matrix

57

py

59

76

1–3’ of black chert w/q

veins and local py,

possible fine sph,

sample JMP RK2

dark gray slatey argillite

w/pale gray layers and

lenses

MA>SA

SA>>MA

SA w/MA &

q-py lenses

Approximate location

of PS136

Sh39

Sh69 Sh22

L68

vein q>

carb>ser

carb>

ser>q

L38

Sh41

Sh29

L31

Sh40

intensely

sheared

vein q

5–10% py

healed

sheared

contact

75

73

MA>SA

47

65 healed S3

age shear

dark gray

slate w/q

lenses, SA?

q>ser,

1–3% py

carb>chl>

ser chl>ser>

q>carb

PS81

small scarp

w/SPc float

q>chl>

carb

S2 overprints

carb veins

dipping 2°W

recrystallized fine

gabbro texture, chl>

carb>q>leuc

q-ser

carb-q-marip-ser

q-ser

q > ser, minor carb

PS80

72

65

73

MA&SA

SA

55

SA>MA

SA>MA

SA>MA

35

?

?

?

MARGIN OF

ANCIENT

LANDSLIDE

840

HV307

MA>SA

MA>SA

SA

SA=MA

(local MA>SA) 72

21

59

31

31

38

SA

65

65

55

SA>MA

SA

SA?

(location very approximate)

MA=SA

MP at 200–218’,

SP & SPc at

218-943’

MA>SA

SA

83

JMP131

(conodont sample)

SA

MA>SA

78

PS119

2-5% py outcrop?

SP

PS118

DG (foliated gabbro)

SPc

5–10% py

PS120

181–199.6’ is dike

or sill w/plag and

amphibole, 199.6–

276.5’ is SC

Possible F2

syncline here

with argillite

L45–70

Sh81

qsc

85

SS 30

UMa

SPc

MARGIN OF POSSIBLE

ANCIENT LANDSLIDE

80

65

SA>>MA SA>>MA

SA>MA

SA>MA

85

SA>MA

21

55

MA>SA

SA

SA

SA>>MA

68

SPc: 5–20% py disseminated in q-ser-chl-carb(?) phyllite 30 75

SP w/ >10% py

SP q-rich w/

5–10% py

SPc w/ 5–10% py

SPgr float

2–5% py SPgr float

Sh25

Sh13

Sh20

Sh10–15

Sh19

qsc (carb-rich)

MP carb-q-marip

phyllite

Sh40

Sh35

Sh65

SC

UMa

GSS: slide blocks or

outcrop(?), lenses of

black to gray slatey phyllite

carbonate rock w/

phyllitic partings (UMa)

Ultramafics, projected

beneath landslide

GSS: slide block

or outcrop(?)

Sh55

L53

50

Sh76

PS14

SA>MA

SA>MA

SA

SA (gray)

70 45

ave 26

88

SA>>MA

MA>SA

54

MA>SA 35

SA

57

45

SA

possible S2.5?

Sh65 SP: ser-q w/ minor

chl and carb, no py

slightly

graphitic

shear-foliated

 breccia

L24

Sh48

5–10% py

at base of

outcrop

5–10% disseminated py,

lenses to 3’ thick of carb,

q, py, sph, gal, tr cp

Sh25

Sh26 Sh31

L15

?

?

SP

Sh51

Sh63

PS4

SPc coarse,

w/ talc

L5

40

10–20%

py

Sh55

Sh51

2–5%

py 5–10% py

low py

sph, py,

carb

L25

Sh(?)80 47

to 4’ sph,

py, gal

81

2–5%

py

cx

1.7’ massive

py

87

Sh54

Sh80

Sh45

L78

5–10% py

carb-serq-leuc,

1–2% py 26

78

80

55

Sh55

cx DMA

disseminated

sph, gal bar-py

cx

cherty argillite? 24

29

Sh32

81 85

MA>SA

4‘ medstrong

gouge andes dike,

not deformed

SPgr

breccia

59

80

pebbly

sandstone

interbeds,

10–20% py

1.8’ semimassive py

L37

Sh38

very graphitic,

5–10% py, shear

foliated?

brecciated?

breccia

?

10 42

61

outcrop?

QCM

90% carb, 5–10% q,

w/ minor marip, ser

Sh19

qsc

carb-rich

fragments carbonate rock w/

phyllitic partings (UMa)

pale and dark gray

layered GSS(?) and 

q-rich lenses of GSS(?),

rotated block?

PS100

boulders(?) of

SSS(?) folded

by F3 and F4

?

NW WEST ORE

Sh88

Sh56

Sh13

Sh10

Sh8 Sh5

ave 26

ave L1

16

MARGIN OF POSSIBLE

ANCIENT LANDSLIDE

Sh75

Sh55

Sh23

Sh55

7

27

L13

L39

Sh48 Sh22

MAKI 

FAULT 

?

?

?

PS8

BIG

SORE

SA

45

37

26

67

ave 50

SA>MA

39

48

SA>MA 82

30

SPc SA>>MA

MA

locally

carb-altered

carb-altered

Sh46

61

marip w/talc, ser

or chl (UMa)

massive greenstone,

act and chl-carb coarse gabbroic

texture

SPc: q-carb-chl

massive greenstone

w/ act CR: zones of

white phyllite, chl, talc or ser?

S2 or S2.5?

(cuts older foliation)

SPgr breccia

Sh51

L25

SPc, cb w/minor marip

disseminated py

SPgr

SPc, cb Sh31

L20

chl>q

>carb

71 SS

10°

GSS: fine black to dark

gray slate, probably

rotated blocks

? ?

in place?

in place?

WEST ORE

?

90

67

SA>MA 35

83

SA>MA

78

85

85

DMA

q-pebble sandstone/

conglomerate

SA=MA

MA>SA

SA

SA

SA>MA

disseminated

py

ave 35

SA>>MA thin py

layers

20 7

SA

MA>

SA

28

42

SA

SA>MA SA

SA

strongly

developed

S3 and F3

65

ave 42

26

26

30

25

SSS

MA>SA

massive greenstone

w/ act and chl-sercarb

SA>MA

approximate

location

cx

SA>MA

SA

20

40

49

41

39

43 47

49

36

30

88

36

85

29 38

dark chl phyllite

MA>SA

SA>MA

MA>SA SA>>MA SA

SA>>MA

SA

PS123

SSS w/ sandstone &

dolomitic limestone

beds

S3 spaced

2-10 cm

Sh(?)18

SA

rotated

block?

SP w/ deformed q

veins, possible slump

SA

SPc: carb-q-chl

chl-carb-q-leuc possibly shear

foliation and lineation?

SPgr: q-rich

2–5% py

Sh34

SPc: chl-q-leuc phyllite

antiformal

closure of S2

ser-q-carb-leuc

MP: talc-maripcarb-q-(py)

SC

CR: chl phyllite

Contact parallel to

bedding in limestone, 

4’ of conglomerate

below contact

45

Gallagher 2001–1

(conodont sample)

SA>MA

SA

10

5 28 HLS

30

30

SA SA>MA

?

?

MARGIN OF POSSIBLE

ANCIENT LANDSLIDE

approximate

location

SSS:

rotated

blocks?

approximately

50°?

?

?

UPPER SW

OREBODY

F3 antiform

47

45 51

23

64

31

40

MAKI 

FAULT?

?

?

GSS 

or SA?

GSS

or SA?

GSS

or SA?

SA?

PS62, 61

PS2

PS58, 59, 60

PS63, 64

SA?

77

76

69

53

?

? ?

No outcrop

No outcrop

rotated

block

23

75

15

19

82

23

ave 27

80

90

19 80

17

Sh65

55

59

35

35

16 85

SSS

SGS

19?

ave 15

LOWER SW

OREBODY

85

36 64

35

75

68 87

20

33

15

SSS (gray)

Slump block?

(rock is similar

to 83)

65

68

42

39

72

40 39

85

36 58

SA>>MA

SA>MA

SA

SA

SA~MA

SA>>MA

MA SA

SA>MA

?

29

56

21

60

49

83

52

69

32

SA (silicified)

Strong 1–2’fault gg

and 4’ carb-cemented

breccia, drag suggests

left lateral displacement

SA>MA

SS 46°

cx Contacts parallel

bedding and S2

Conglomerate fines upward

into sandstone w/ argillite

interbeds

cx

Argillite w/

sandstone

interbeds

COVERED AREA—MAGNETIC HIGH AND

RESISTIVITY LOW—INTERPRETED AS A NEARDIP SLOPE, THIN COVER OF ARGILLITE, DUE TO

F3 FOLDING, ABOVE SERPENTINITE 75

37

SA>MA

LANDSLIDE

?

28

9

46

78

50

82 73 36

48

87

51 68 50

±30

SA>MA

Highly graphitic phyllite

w/ some massive beds

(argillite?) 88

40

35

75

MA>SA

MA>SA

SA>MA

?

ave 50

MA>SA

SA

?

?

? ?

16

31

 200S

EXTENSION

?

SA?

(silicified)

43

80

Healed

fault? 37

SA>>MA

?

5

53

76

74

58 80

64

82

SA

41

SA>MA

85 SA>MA 45

SA>MA

SA>MA

SA>MA

SA

SA>MA?

SA

3‘ carb 

bed

weak 0.5”

fault gg

SA>MA

42 64

86 80

66

MA

47

82

85

68

83

45

80

35

40

80

78

70

10

13

25 85

60 5

39

47

44 48

39

54

27 56

79

SA?

42

MA beds

50

86

63

43

66

43

59

48

35

81

45 39

SA?

34

47

32 50

MA>SA in several

foot thick interval

SA?

65

MA>SA

52

SA

80

55

75 90

MA>SA

3–4’ dolostone bed

SA or

GSS

MA<SA

75

1.5’

dolostone bed

Pale gray slatey

lithic sandstone of

the type found in

GSS unit E of

PS108

SA or

GSS

SA or GSS

& SSS &

minor MA

MA>SA

51 73

80

52

S2 approximately

parallel to bedding

but exact relationship obscured by

strong S3

SSS

30

47

59

38

68

31

42 50

35

18

edges of outcrops

line up, fault?

SA>MA

?

?

?

32

40

35

35

Sh31

L26

60

40

36

86

77

29

67

43

80

SA>

MA

40

?

SP: altered

gabbro

chloritic

alteration

SP: altered

gabbro

cherty or black

argillite or GSS

beds

56 52

47

a few thin brownweathering dolomitic

beds

?

qsc

Sh62 Sh27

L15 rubblecrop

NESP1

Sh45

25

SA

SA>>MA

SA

SA>>MA

SA

S2-bedding relationship

consistent over large area

SA>>MA

(calcitic or dolomitic)

38

56

SA MA

(calcitic or

dolomitic)

MA dolomitic beds>SA

57

75

MA dolomitic

beds~SA, lightning

veins rare

75

35

85

partly silicified

GSS w/ q veins

topographic

lineament HGB

? ? ? ? SP: altered

gabbro

sheared

SA or GSS

silicified

cherty qsc(?)

79–87

76

75

SS 40°

69

80

MA & SA

HGB

slatey black

GSS or SA

w/ q veins

foliated small scale vegetation and

topographic anomaly, 

probably subcrop of gabbro

same gabbro as

500’ to east

MA~SA

32

42

SA>>MA MA>SA

38

SA>MA

88

SS

0-10°

64

55

58

28

black calcareous SA

limestone

 lens

19

37

26

38 21

25

30

44

SA>MA

SA>>MA

brown

mica

covered

gougy

zone

silicified &

q veined arg, cherty

42 MA>SA

51

56 34

4“ gouge

MA>SA

cherty SA

45

61

36

SS

5°

65

83

SS

12°

slickensides

or glacial?

8“ strong

gouge

SS 13°

F2.5?:4

AP2.5?:41

47

40

? ?

MA>SA

SA>>MA

73

SA

56

68

36

MA~SA

MA & SA

SA

SA

chl-plag-ep

4‘ limestone bed

42

78

76

40

?

?

SA SA (black calcareous)

MA & SA

63

SA (black calcareous) w/

some brown dolostone MA beds

?

?

97LG–05?

(Conodont

sample) significant

epidote

here

no limestone float

approximate

location

EAST ORE

LITTLE MAKI FAULT ?

q-rich

chl=carb>q

56

SSS: rubblecrop?

GSS: slatey

boulder?

MAJOR

F2 SYNCLINE

SA

orange-stained, carbaltered, silicified basalt

conglomerate hard q and

carb pebbles, carb matrix

foliated

L5

42

SPgr float gentle S2 dip

Conglomerate and coarse

sandstone, SPg matrix,

disseminated sph, gal

cherty, w/

q veins

PS84

PS128

PS76

PS77

PS95

PS25

PS15

PS29

PS30

PS9

PS31

PS79

PS18

approximate location

PS16

PS45

PS42, 44

PS17

PS70

PS71

PS75

PS112

PS93

PS94

PS98

PS96

PS87

PS99

PS19

PS121

PS78

PS101?

PS111

PS115, 117

PS105

PS116

PS85

PS49, 51

PS88, 90, 91

PS89

PS74

PS53

PS72

PS41

PS24

PS73

PS11

PS7

PS26

PS10

PS27

PS55, 56, 57

PS6

PS1

PS12, 13

PS48, 54

PS43

PS97

PS104

PS102

PS113, 114

PS103

PS106 PS107

PS52

PS5

PS46 PS122

PS39

PS83

PS109

PS108

PS110

PS68, 69

PS21

PS40 PS66, 67

PS65

PS28

PS22, 23

PS3

PS50

Office

Mill

UPPER

SHEAR ZONE

UPPER EDGE OF UPPER SHEAR ZONE

GALLAGHER

FAULT

UPPER SHEAR

ZONE

UPPER

SHEAR

ZONE

CR

SC

UMa SPgr

UMa

UMa

UMa

SPgr

SPgr

QCM

SPgr

SPcb &

SPgr

UMa

SPgr

UMa

SPgr

SPgr

xSPgr

SP

CX

CX

SPgr

SPgr

SP CX

CX

SPc

SPc

SC SPcb

MP

QCM

xSPgr

SPcb

SPt

SPcb

QCM SPcb

xQCM

SPgr

xSPgr

xQCM

SPgr

UMa

UMa

SPgr

SP

QCM

SPcb SPc

SPc

SP

SPc

SP &

SPgr

CR

SPcb

xSPgr

SP

SPgr

SP

SPc

SP

SP

CR

MP

SP

SPc

SPc

arg

?

?

SPc

SP qsc

?

?

?

?

?

?

?

?

?

?

?

?

?

?

?

?

?

SPc

SPgr

SPgr

MP

SP

SP

SP

SP

SP

MP

SP

GSS breccia

GSS breccia

GSS

SSS?

GSS

GSS

SSS

SPgr

UMa

SP

SPc

SPcb

CR: pale chl-q

SPgr

SP

qsc

SPgr

DG

CR

SC

SPc

CR

SP

CR

CR

?

?

?

?

?

?

SPc

SPc, cb

SPcb

SPc

SPc, cb

SPtcb

SPgr

SPgr

SP

SPgr SPcb

UMa SPt

SPgr

SPgr

SPcb

MP

SC

UMa

SPcb, SPt SPt

CR

SPgr

SPc, cb

SPgr

SPc

SP & SR SPgr

SPc

SP

UMa

?

?

?

?

?

SSS

GSS

GSS

GSS

qsc

qsc

qsc

GSS

qsc

qsc

GSS

qsc

SSS

SSS

GSS

SSS

SSS

GSS

GSS

qsc

SP

? ?

?

SP:

GSS

GSS 

or SA?

?

?

GSS

GSS

GSS

GSS

GSS

GSS

?

SSS

SSS

GSS

GSS

UMa

SSS

SSS

SSS

GSS>>SSS

?

?

?

SPgr

SPc?

SPc

GSS>SSS

SSS>GSS

DG

CR

SC

HLS

SPcb SPcb

GSS

GSS

SSS

SSS>SA

SSS>SA

HGB

?

?

?

?

SSS

GSS

?

?

?

?

?

SSS

GSS

SSS

GSS

SSS

SSS

GSS

GSS

SSS

SSS

?

?

?

?

?

?

?

?

arg? GSS

GSS

SA?

?

arg?

arg

arg

GSS

GSS

SSS

GSS

GSS

GSS

?

SSS

SSS

SSS

SSS

SSS

GSS

SSS

?

?

SSS

GSS

GSS

GSS>SSS

SSS

GSS>>SSS

GSS<SSS

GSS>SSS

GSS~SSS ?

?

HGB

HGB

SSS

SSS

GSS

GSS

GSS

SSS

SSS>GSS

SSS>GSS

SSS>GSS

SSS<GSS

GSS

SSS

arg

arg

arg? HGB

HGB

HGB

HGB

HGB

arg

arg

arg

GSS

SGS

SGS

FGS

SGS

HGB

HLS

HB

HB

HLS

HB

HB

HLS

HB

HLS

SPcb

qsc (carb-rich)

SPt

SP

SPgr SSS

qsc

SPgr

xSPgr

CX

920

PORTAL

1350

PORTAL

Bruin

Creek

Upper Meadow

Big Sore

 Basin

Greens

Greens

Greens

Creek

Creek

Creek

Gallagher

Creek

Gallagher

Creek

Big Sore Creek

Big

Sore

Creek

Gallagher

Ridge

B-ROAD

MAP ERRORS

During the 1997 field season, mapping was carried out north of 15000N using a 1 in. = 200 ft 

topographic base provided by Noranda Inc., to which mine coordinates had been added. Many of 

the mapped outcrops were tied to new survey points in 1998. All mapping north of 16950N and 

west of 22100E, including mapping carried out in 1998 and 1999, is plotted relative to survey 

points, claim corners, and drill holes. This information should be accurately located to within a few 

feet. Most mapping between 15500N and 16600N and between 22100E and 24500E was plotted 

relative to topographic features and streams as they appeared on the 1 in. = 200 ft topographic base. 

The topographic features appear to be accurately positioned on the map relative to the mine grid, 

but some claim corners and drill holes were found to be misplotted by up to 90 to 100 ft. It is hoped 

that the geology in this area is plotted reasonably accurately, but outcrop locations should be 

verified relative to new survey points in this area. The area in Big Sore Creek between 16950N and 

16700N, which includes two outcrops, has been stretched about 90 feet in a north-south direction to 

accommodate the difference between the two areas. Areas in Big Sore Basin that were mapped in 

1999 (14300 to 15500N, 21400 to 23000E) were located by reference to the grid that was surveyed 

in this area by David Wilson in 1998 using GPS (not shown on this map). Outcrops in this section 

of the map should be accurately positioned to within a few feet. Most of the area was mapped using 

claim corners as reference points. The coordinates that are available for some claim corners 

disagree with other data, such as drill site locations, suggesting discrepancies of up to 35 ft.

Outcrops mapped in the High Sore area during the 1997 field season were located by reference 

to the High Sore grid. These were plotted on the map using the mine coordinates assigned to the 

brass cap located at High Sore. If future surveying leads to revision of the brass cap coordinates, 

then the High Sore outcrops will merit replotting.

Outcrops mapped in 1997 south of 15000N were located on color air photos at a nominal scale 

of 1 in. = 1,000 ft. The positions of these outcrops are subject to considerable uncertainty. Outcrops 

located east of 21200E and between 13800N and 14200N were plotted using reference points 

surveyed by compass and tape in 1998 by Paul Lindberg. Outcrops in Upper Meadow of Gallagher 

Creek were relocated in 2000 by reference to the GPS-located Upper Gallagher grid. All other 

outcrops in the Upper Gallagher Creek area were mapped by reference to this same grid. 

50

200 400 600 800 1000 FEET

100 150 200 250 300 METERS

0

0

GEOLOGICMAP OF THE SURFACE, GREENS CREEK MINE, ALASKA

By

John M. Proffett

2010

By John M. Proffett, 1987 and 1997−2002

Grid in gray is Alaska Coordinate System, zone 1

North-south grid in black is a local surface grid of northings and eastings, in feet,

with origin located at lat 58.0234985°N., long 134.7311267°W.

Northwest-southeast grid is a local grid of cross section (XS) and long section (LS)

coordinates that are used for Greens Creek mine workings. The grid is

rotated 26.5651 degrees counterclockwise from due north

100-foot contours are from 1997 AreoMap computer-drawn map,

with modifications from field surveys

Contour elevations are relative to sea level

Drill hole and underground elevations are relative to mine system; 

60 feet must be subtracted from these to give elevations 

relative to sea level. 

ALASKA

MAP LOCATION

U.S. DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY

PROFESSIONAL PAPER 1763

PLATE 7–1

This and other USGS information products are available at 

http://store.usgs.gov/

U.S. Geological Survey

Box 25286, Denver Federal Center

Denver, CO 80225

To learn about the USGS and its information products visit 

http://www.usgs.gov/

1-888-ASK-USGS

This report is available at:

http://pubs.usgs.gov/pp/1763

Any use of trade, product, or firm names is for descriptive 

purposes only and does not imply endorsement by the U.S. 

Government.

Although this information product, for the most part, is in the 

public domain, it also contains copyrighted materials as noted in 

the text. Permission to reproduce copyrighted items for other than 

personal use must be secured from the copyright owner. 

Suggested citation:

Taylor, C.D., and Johnson, C.A., editors, 2010, Geology, geochemistry, and genesis of the Greens Creek massive sulfide deposit, 

Admiralty Island, southeastern Alaska: U.S. Geological Survey 

Professional Paper 1763, 429 p., 7 plates on CD.

Prepared in cooperation with the

KENNECOTT GREENS CREEK MINING COMPANY

EXPLANATION

Contact—Showing dip. Dashed where inferred, dotted where buried

Edge of outcrop

Fault —Showing dip and slickensides. Dashed where buried

Landslide outline

Topographic lineament—Possible fault

Quartz vein—Showing dip

Massive sulfide deposits

Iron oxide spring deposits

Bedding form surface

Bedding—Showing strike and dip

Vertical bedding—Showing strike

Shear foliation—Showing strike and dip

Vertical foliation—Showing strike

S1.5 metamorphic layering—Showing strike and dip

S1 foliation—Showing strike and dip

Drill hole—Fill color represents map unit encountered at the top of bedrock

Survey point

Contours—Index and intermediate

Streams—Major and minor. All streams are perennial

Subsurface workings—Projected to surface

42

35

Sh42

40

Sh90

64 SS 0–10°

76

31

PS14

HYD GROUP OR YOUNGER

Fine-grained siliceous metasedimentary rock—Pale gray chert or silicified metasiltstone

Sericitic slatey metasedimentary rock—Gray to greenish metasandstone and 

metasiltstone

Graphitic slatey metasedimentary rock—Weakly- to strongly-graphitic quartz mica 

phyllite and dark- to pale-gray slate. Local tan or white carbonate beds indicated 

by blue lines

Sericitic (SSS) and graphitic (GSS) rocks, thinly interlayered

HYD GROUP, LATE TRIASSIC

Metabasalt flows

Limestone—Beds and pods of limestone, and limestone fragments contained in 

metabasalt

Gabbro

Mine argillite—Includes black to dark-gray slatey argillite (SA) and gray to brown 

massive argillite (MA)

Dolomitic massive argillite

Conglomerate/breccia—Deformed conglomerate, sedimentary breccia, and coarse 

sandstone

TRIASSIC OR PALEOZOIC ROCKS

Mine phyllite—Sericite-quartz phyllite with lesser chlorite, pyrite, graphite, 

carbonate (SPcb), or tan leucoxene (SPt)

Chloritic phyllite—Chlorite-rich phyllite with lesser quartz, carbonate, sericite, 

pyrite, or leucoxene

Deformed and altered gabbro—Relict gabbroic textures are evident in less altered 

samples (DG); chlorite is abundant where alteration was stronger (CR)

Mariposite-bearing rock—includes mariposite-sericite phyllite (MP) and 

quartz-carbonate-mariposite rock (QCM), which is locally brecciated (xQCM)

PALEOZOIC ROCKS

Talc-carbonate phyllite and schist—Contains serpentine as a minor mineral, and 

includes some carbonate-rich rocks. Alteration product of ultramafic rocks

Serpentinite—Also includes serpentine-chlorite rock

Quartz-sericite ± carbonate phyllite—Commonly displays strong shear fabric 

(S2.5); may be mylonite. Possibly Retreat Group

Graphitic quartz mica schist and phyllite—Contains metamorphic quartz- and 

mica-rich layers. Probably Retreat Group

LIST OF MAP UNITS

Mapped Inferred outcrops

[The following map units are defined on the basis of lithology and may or may not correspond to geologic formations that have been recognized 

elsewhere in the region. See chapter 7 for more complete lithologic descriptions and a discussion of regional stratigraphic correlations.]

MP/QCM

SSS

SGS

FGS

GSS

qsc

SP

arg

DG/CR

SPc

HLS

HB

HGB

DMA

CX

UMa

SC

SPgr

Juneau

Mansfield

Peninsula

Admiralty

Island

Chatham

Strait

Young Bay

Stephens

Passage

Douglas

Island

Hawk

Inlet

135°00’ 134°45’ 134°30’ 134°15’

58°00’

58°15’

Inset map: Location of map, depicted in yellow, relative to the 

surrounding area.