2000

3000

3000

3000

4000

2000

3500

2500

3000

3500

4000

2500

2500

2000 2500

1000

2000

1000

1500

1500

1500

1000

1500

500

500

3500

3000

3000

3500

2000

1500

1500

1000

1000

500

500

500

1000

Fowler

Fowler

Lil

Sore

Creek

Creek

Creek

Creek

Zinc

Creek

Bruin

Cub Creek

Creek

Cliff

Creek

Greens

Creek

Gallagher

Creek

Sore

Big

Creek Greens

Creek

Cascade

Creek

Zinc

YOUNG BAY

Killer

Creek

Hawk Inlet

25

65

70 22

30

80

30

70

30

65

70

75

50 40

72

38

70

40

85

58

75

50

70

46

80

48

78

30

12

80

40 70

58 75

55

85

50

55

80

25

80

35

40

55

30

70

20

88

55

68

55

25

30

70

70

80

45

45

20

50

60

20

65

32

80

80

25

35

45

28 70

55

80

40

55

75

75

40

30

85

35 35

50

38

82

20 20

20 35

25

80

28

65

20

70

20

80

20

50 26

55

10

20

40

0

10

15

30

10

50

28

80

10

35

20

50

80

10

40

40

20

78

80

20

20

35

35

20

15

30

20

30

15

20

10

20

10

15

65

30

30

20

30

33 20

20

65

40

40

40

40

20

YOUNG BAY SHEAR ZONE

YOUNG BAY SHEAR ZONE

HAWK INLET SHEAR ZONE

ZINC

CREEK

THRUST

UPPER

UPPER

SHEAR

SHEAR

ZONE

ZONE

CLIFF CREEK

THRUST

GALLAGHER

FAULT SYSTEM

GREENS

CREEK

THRUST

MAKI FAULT SYSTEM

A–ROAD

Cannery

Serpentine

Gulch

Killer Creek

Serpentinite

B–ROAD

B–ROAD 

Gallagher

Ridge

Hawk

Inlet

Limestone

Bluff

A–Road Prospect

Lil Sore

Lower Zinc Creek

Upper Zinc Creek

Lakes District

Mammoth Claims

Mammoth Ridge

Upper Bruin Creek

Lower Bruin Creek

Cub Creek

Upper Cliff Creek

Mine Portal

Gallagher Creek

Big Sore

Killer Creek

Lower

Cascade

Upper

Cascade

40

70

80 40

70

76

70

70

40

65

65

55

72

72

80

80

50

70

55

20

45

83

50 70

35

20

50 40

65

45

65 30

60

30 65

25

70 85

45

70 25

40

50

55

80

55

75

50

48

32

70

45

65

50

55 25 60

80

75

80

65

65

70 80

75

50

70

70

50 30

28

80

40

60

60

50 80

25 20

40

80

60

60

30 70 70 80 30

45 35

70 70

40

40

60

75

50

30 30

45

70

45

45

80

45

45

20

45

70

42

50

40

40

40

70

65

50

30

70

80

60

48 50

30 75

80 48

32

40

65

70 35

70

60

45

35 70

40

55 35

30

20

30

24 25

65

55

80

60

70

50

25

25

60

30

60

30

30

26

80

78

50

25

55

50

44 70

42

20

50

40

25

42 42

80 30

45

70

40

40

80

40

20 75

75

10

80

80

80

40

60

20

40

45

40

80

25 40

40

50

65

70

20

70

65 45 35

60

60

55

30

15

70

55

72

60

30

60

70 70

70

30

40

40

40

35

50

70

30

70 70

20

45

70

75

35

60

70

45

60

45 65

45

83 75

60

20

50

60

10

80

20

85

40

25

30

40

20

50

Greens Creek

Mine

Pcs

Pcs

Pcp

Pcs

Drg

^hba

Qhse

^hpb

^hpb

^h(?)am

^h(?)am

^ha

^hba

Drg

Pcp

Qhpb

Drg

^ha

Drg

^hpb

Drg

^hpb

Pcp

KJs

^hpb

Drpb

Pcpw

^hpb

Drg

Drg

^hba

^hba

Pcp

^ha

^ha

^hba

^hba

Qha

^hc

^hba

^hba

Pcpw

Drg

^ha

^hpb

Drm

Drg

Pcs

Drg

Drpb

Drpb

Drg

^hgb

^hgb

^hba

^ha

Drpb

Drpb

^hpb

^ha

^ha

Drg

Drg

^ha

^hba

^hse

^ha

Drpb

Drg

^ha

^hba

^hbx

Drg

^hgb

Qhgc

Drpb

^hgc

Pcpw

Qha

Pcpw

Pcpw

^hgb

^ha

^hgb

Drg

Qhse

Drpb

Pcpw

^hpb

Drg

Pcs

Pcpw

Drg

^h(?)am

Drg

^hse

^hsr

^hgb

^hgb

Pcpw

Pcpw

^hbx

^ha

^ha

^h(?)am

Drg

^hgc

Drg

Drg

Drpb

^hbx

^ha

Pcpw

^hbx

^hse

Drg

^ha

^hc

^hgb

^ha

^hgb

^hse

Drpb

^hgb

^hsr

^hsr

Pcpw

^hse

^hba

Drm

^hbx

Pcpw

^hl

Pcpw

^hsr

^hsr

Pcpw

^hgc

^hpb

^hse

^hpb

^hl

^ha

Drpb

^hc

^hpb

^hpb

Qhc

^ha

Drg

^hpb

^hsr

^ha

^hl

^ha

2,000 ft

3,000 ft

-1,000 ft

-2,000 ft

1,000 ft

Sea level

2,000 ft

3,000 ft

1,000 ft

B

^hgb

^ha

Drg

Drpb

^ha

Drpb

Drg

^hbx

Hyd Unconformity

Drm Drg

Pcs

B'

Pcs Drg

Drg

Drg

^hbx

^hpb

^ha

^hc

^hgb ^ha

^hgb

^hgb

^ha

^hse

^hc ^ha

^hpb

Drg

^ha

^ha

^hc

^hba

^hba

KJs

B"

-1,000 ft

-2,000 ft

Sea level

Looking west Looking north-northwest

-1,000 ft

1,000 ft

2,000 ft

3,000 ft

4,000 ft

-2,000 ft

Sea level

^h(?)am

Pcs

Drpb Drpb Drg

A

^hgb

^hse

Drg

^ha

^hse

^hse

Drg

Drg

Qhgb

^ha

Drg

Drg

Drg

Drg

Drg

Drg

^hse

^hse

^ha

^ha

Killer Creek

Serpentinite

Looking north-northwest NO VERTICAL EXAGGERATION

NO VERTICAL EXAGGERATION

Looking northeast

^hgc

^hgc

Mammoth Ridge

Green Carbonate

unit

^ha

^ha

Drg

Drg

^hsr Drg

Greens Creek

Ore Horizon

F2 Lower Limb

on Section

^ha

F2

Drg

^hpb

F3

Pcpw

Broad F3

 Structural Arch

^ha

^ha

^hba

^hba

^hba

Drg

^hl

^h(?)am

A' A"

-1,000 ft

-2,000 ft

Sea level

-1,000 ft

2,000 ft

3,000 ft

F2

ZINC CREEK THRUST

YOUNG BAY

SHEAR ZONE

GREENS CREEK THRUST

Big Sore Creek

UPPER SHEAR ZONE

CLIFF CREEK TRUST

Projection of the upper shear zone

Fowler Creek

Lil Sore Creek

Zinc Creek

Greens Creek

Greens Creek

Mine (office)

Greens Creek

B

B'

B′′

A

A'

A"

134°45’ 515000mE 134°40’ 520000mE 134°35’ 525000mE

134°45’ 515000mE 134°40’ 520000mE 134°35’ 525000mE

58°10’

58°10’

6445000mN

6445000mN

58°05’

6440000mN

6435000mN

58°05’

6440000mN

6435000mN

SCALE 1: 24 000

1 1/ 2 0 1 MILE

1000 1000 0 2000 3000 4000 5000 6000 7000 FEET

1 0 .5 1 KILOMETER

CONTOUR INTERVAL 100 FEET

NATIONAL GEODETIC VERTICAL DATUM OF 1929

Compiled by N.A. Duke and A.W. West in 2001

Data sources: Early compilations by T.C. Crafford (1980s), area mapping by N.A. Duke (1995–2001), 

detailed mapping by P.A. Lindberg (1994–1998), J. M. Proffett (1997–2001), A.W. West (2000–2001), and 

C.M. Schrader (2000) 

U.S. DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1763

PLATE 4–1

Universal Transverse Mercator projection. 1927 North American Datum (NAD 27) 

5,000-meter Universal Transverse Mercator grid ticks, zone 8, shown in blue

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

with modifications from field surveys

Contour elevations are relative to sea level

ALASKA

MAP LOCATION

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. GEOLOGY OF THE GREENS CREEK MINE AREA, ALASKA

By

Norman A. Duke, Paul A. Lindberg, and Andrew W. West 

2010

24°

TRUE NORTH

MAGNETIC NORTH

APPROXIMATE MEAN

DECLINATION, 2001

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.

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 

Prepared in cooperation with the

KENNECOTT GREENS CREEK MINING COMPANY

EXPLANATION

Lithologic contact

Major fault—Brittle or ductile fault

D2 thrust fault—Sawteeth on upper (tectonically higher) plate

Inclined bedding (S0)—Showing strike and dip

Vertical bedding (S0)—Showing strike

Inclined S2 foliation—Showing strike and dip

Vertical S2 foliation—Showing strike

Inclined S3 foliation—Showing strike and dip

Vertical S3 foliation—Showing strike

L2 lineation—Showing bearing and plunge

L3 lineation—Showing bearing and plunge

D2 Fold—Showing plunge of axis and dip of axial plane

D3 Fold with inclined axial plane—Showing plunge of axis and dip of axial plane

D3 Fold with vertical axial plane—Showing plunge of axis 

Overturned F2 or F3 fold—Showing axial trace of syncline (arrows ponting 

toward trough) or anticline (arrows pointing away from trough)

Prospects or mineral occurrences

BOUNDARIES

Admiralty Island National Monument

Experimental forest

Greens Creek joint venture

Land exchange

SURFACE FEATURES

Roads

Buildings

Streams

Waterbody

55

60

50

40

15

20

35

32

80

40

Juneau

Mansfield

Peninsula

Admiralty

Island

Chatham

Strait

Young Bay

Stephens

Passage

Douglas

Island

Hawk

Inlet

MAP

AREA

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.

Jurassic-Cretaceous

Upper Triassic

Seymour Canal flysch

HYD GROUP

Basalt

Limestone

Mine argillite

Conglomerate

Fault breccia

Siliceous rock

Serpentinite

Black phyllite

Permian-Carboniferous

CANNERY FORMATION (?)

Siliceous white phyllite

Siliceous schistose sedimentary rock

Dolomitic phyllite

Devonian

RETREAT GROUP

Greenstone

Marble

Gabbro Amphibolite

Green carbonate

Black phyllite

[See chapter 4 for more complete lithologic descriptions and a discussion of regional 

stratigraphic correlations.]

LIST OF MAP UNITS

KJs

^hgb ^h(?)am

^hl

^ha

^hc

^hbx

^hsr

^hse

^hpb

^hgc

^hba

Pcpw

Pcp

Pcs

Drm

Drg Drpb

DEFORMATION HISTORY

POST SEYMOUR CANAL FLYSCH

D5—Major northwest-trending, generally right-lateral brittle or ductile faults

D4—Late reactivation of D2 thrust faults following D3

D3—Northwest-southeast-trending chevron folds with spaced axial planar cleavage

D2—Dominant east-west-trending, shallow, south-dipping, penetrative foliation 

axial planar to recumbent isoclinal folds and north-verging thrusts (Zinc 

Creek and Upper Cliff Creek thrusts)

POST RETREAT GROUP, PRE CANNERY FORMATION

D1—Relict metamorphic segregation foliation in Retreat Group greenstone and 

black phyllite

METAMORPHIC DOMAINS

Greenschist facies—Greens Creek domain bounded by Young Bay shear zone 

and Greens Creek thrust fault

Epidote amphibolite facies—Northeast of Young Bay shear zone and southwest 

of Greens Creek thrust fault

Garnet amphibolite facies—South of Upper Cliff Creek thrust fault