2000

3000

3000

3000

4000

2000

3500

2500

3000

3500

4000

2500

2500

20002500

1000

2000

10001500

1500

1500

1000

1500

500

500

3500

3000

3000

3500

2000

1500

1500

1000

1000

500

500

500

1000

Fowler

Fowler

LilSore

Creek

Creek

Creek

Cre

ekZi

nc

Creek

Bruin

Cub

Cre

ek

Creek

Cliff

Creek

Greens

Creek

Gallagher

CreekSore

Big

Creek

Greens

Creek

Cascade

Creek

Zinc

YOUNG BAY

KillerCreek

Ha

wk

I n

l et

25

65

70 22

30

80

30

70

30

65

70

75

504072

38

70

40

85

58

75

50

70

46

80

4878

30

12

80

4070

5875

55

85

50

55

80

25

80

35

40

55

30

70

20

88

5568

55

25

30

70

70

80

45

45

20

50

6020

65

3280

80

25

35

45

2870

55

8040

55

75

75

40

3085

3535

50

38

82

2020

2035

25

80

28

65

20

70

20

80

205026

55

10

20

40

0

10

15

30

1050

2880

10

35

2050

80

10

4040

20

78

80

20

20

35

35

20

15

30

20

30

15

20

10

20

10

15

65

30

30

20

30

3320

20

65

40

40

40

40

20

YOUNG BAY SHEAR ZONE

YOUNG BAY SHEAR ZONE

HAWK

IN

LET SHEAR ZON

E

ZINC

CREEKTHRUST

UPPER

UPPER

SHEAR

SHEAR

ZONE

ZONE

CLIFF CREEK

THRUST

GALLAGHER

FAULTSYSTEMGREENS

CREEK

THRUST

MAKI FAULT SYSTEM

A–ROAD

Cannery

SerpentineGulch

Killer CreekSerpentinite

B–R

OA

D

B–ROAD

Gallagher

Ridge

HawkInlet

Limestone

Blu

ff

A–Road Prospect

Lil Sore

Lower Zinc CreekUpper 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

LowerCascade

UpperCascade

40

70

8040

70

76

70

70

40

65

65

55

72

72

8080

50

70

55

20

4583

5070

35

20

50 4065

45

6530

60

3065

257085

4570

25

40

5055

8055

75

50

48

32

70

45

65

505525

60

80

75

8065

65

7080

75

50

70

7050 30

28

80

40

60

60

5080

25 20

40

8060

60

30 70 708030

45 35

7070

40

4060

7550

30 30

4570

45

45

80

4545

20

45

70

42

50

40

40

4070

6550

30

70

80

60

4850

30 75

8048

32

40

65

7035

70

60

45

3570

40

5535

30

2030

24 25

6555

80

60

70

50

2525

60

30

60

30

30

26

80

78

5025

55

50

44 70

42

20

50

40

25

42 42

8030

45

70

40

40

80

40

2075

75

1080

80

80

40

60

2040

45

40

80

2540

40

50

65

70

20

70

65 4535

60

60

55

30

15

70

55

72

60

30

60

7070

70

3040

40

4035

50

70

30

7070

20

45

70

75

35

60

70

45

60

654545

8375

60

20

50

60

1080

20

85

4025

30

40

20

50

Greens CreekMine

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

^haDrpb

Drg

^hbx

Hyd

Unco

nfor

mity

Drm Drg

Pcs

B'

PcsDrg

Drg

Drg

^hbx

^hpb

^ha

^hc

^hgb ^ha

^hgb

^hgb

^ha

^hse

^ha^hc

^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

DrpbDrpb Drg

A

^hgb

^hse

Drg

^ha

^hse

^hse

Drg

Drg

Qhgb

^ha

Drg

Drg

Drg

Drg

Drg

Drg

^hse

^hse

^ha

^ha

Killer CreekSerpentinite

Looking north-northwest NO VERTICAL EXAGGERATION

NO VERTICAL EXAGGERATION

Looking northeast

^hgc

^hgc

Mammoth RidgeGreen Carbonate

unit

^ha^ha

DrgDrg

^hsr Drg

Greens CreekOre Horizon

F2 Lower Limbon 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

ZIN

C C

RE

EK

TH

RU

ST

YOUNG BAYSHEAR ZONE

GR

EE

NS

CR

EE

K T

HR

US

T

Big

Sore

Cre

ek

UPPER SHEAR ZONE

CLI

FF C

REE

K T

RU

ST

Projection of the upper shear zone

Lil S

ore

Cre

ek

Fow

ler C

reek

Zinc

Cre

ek

Gre

ens

C

reek

Greens CreekMine (office)

Gre

ens C

reek

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 0001 MILE1 1/ 2 0

7000 FEET1000 10000 2000 3000 4000 5000 6000

.5 1 KILOMETER1 0

CONTOUR INTERVAL 100 FEETNATIONAL GEODETIC VERTICAL DATUM OF 1929

Compiled by N.A. Duke and A.W. West in 2001Data 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 INTERIORU.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 blue100-foot contours are from 1997 AreoMap computer-drawn map,with modifications from field surveysContour 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

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

2010

24°

TRUE

NOR

TH

MAG

NETI

C NO

RTH

APPROXIMATE MEANDECLINATION, 2001

Suggested citation:Taylor, C.D., and Johnson, C.A., editors, 2010, Geology, geochemis-

try, 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 athttp://store.usgs.gov/ U.S. Geological SurveyBox 25286, Denver Federal CenterDenver, CO 80225

To learn about the USGS and its information products visithttp://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

2035

3280

40

Juneau

Mansfield

Peninsula

Admiralty

IslandChatham

Strait

Young Bay

Stephens

Passage

DouglasIsland

Hawk

Inlet

MAP

AREA

134°30’134°45’135°00’ 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-CarboniferousCANNERY FORMATION (?)

Siliceous white phyllite

Siliceous schistose sedimentary rock

Dolomitic phyllite

DevonianRETREAT 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

DrpbDrg

DEFORMATION HISTORY

POST SEYMOUR CANAL FLYSCHD5—Major northwest-trending, generally right-lateral brittle or ductile faultsD4—Late reactivation of D2 thrust faults following D3D3—Northwest-southeast-trending chevron folds with spaced axial planar cleavageD2—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 FORMATIOND1—Relict metamorphic segregation foliation in Retreat Group greenstone and

black phyllite

METAMORPHIC DOMAINSGreenschist facies—Greens Creek domain bounded by Young Bay shear zone

and Greens Creek thrust faultEpidote amphibolite facies—Northeast of Young Bay shear zone and southwest

of Greens Creek thrust faultGarnet amphibolite facies—South of Upper Cliff Creek thrust fault