BUREAU NEVADA OF MINES AND GEOLOGY
11626'
560
Tmc
BULLETIN 111, Gold Deposits of the Carlin Trend, PLATE 1
550
60 00
548000mE
Tmc
Qal
11624'
DSw
DSw
552
552000mE
11622'30"
553
11622'
11621'30" 554
DSw
smf
Qal
37
Jil
Qal
6000
Tmc
58 00
4104'
4546000mN
Qal
Tmc
DSw
DSw Qal
Qal
58 00
Tmc
22
Tmc
DSw
DSw
59 00
80
DSw
Tmc
4104'
4546
23
Qal
Tmc
Qal
24
Lithologic contact Showing dip. Solid where continuously exposed, dashed where inferred.
75
Drcsm
smf
smf
RE I
BUZZARD FAULT
590 0
25
#9
Qal
Tmc
DSw
64
Jil
DSw
Tmc Tmc Qal
5800
Tmc
58 00
Qal
Tmc
Tmc 64 DSw
DSw
5900
DSw
Tmc
Normal fault Showing dip; ball and bar on downthrown block, arrows indicated relative movement. Solid where continuously exposed, dashed where inferred, dotted where covered.
DSw
75
Jig
FA U
ND EE
28
R FA UL T
smf Tmc
27
Geology of the Northern Carlin Trend
Newmont Mining Corporation Geologists and Geophysicists Barrick Goldstrike Mining Corporation Geologists
Steve Moore, geologic editor
0
56
Jig
00
LT
28
63
Jig 82
72
Dpcsh
LAR PO
IS
UL FA
78
T
70
74 Jig Jig
DOw
qh
85
NE ZO
Deep Star Mine
P OS T
DEEP STAR
FAULT
Drcsm
Jig 24 75 74
Jig
74
#6
72
DOwcs DOwqh
DOw
qh
GEN
DOw
qh
5700
FAULT
Jil
Qal
FAULT
Tmc
Tmc
40 57'30"
C r eek
FAU LT
5700
MT E LLIS
FAULT
RM
e
Jil
60 00
H I NGE
u
Tmc
Jil
40
Qal
ld
35
Jil
DSw
FAULT
61
65 80
Teir Drc
qh
Drc 70
ss Teir
B
4544
DSw
DSw
59 00
o
Qal
Tmc Tmc
Bedding strike and dip
4544
10-20 overturned
DOwqh DOwqh
31 40 Teir DOw Jig 78
RO JO
sm
Dp
DOw cs Jil
cs
Jig
Dpcsh
55 00
56 00
40
0
DSw
csh
80
T
qh
INM F
00 60 DSw
57 0
DSw
Qal
Tmc
r
Thrust fault Showing dip, teeth in upper plate. Solid where continuously exposed, dashed where inferred, dotted where covered. RMT = Roberts Mountains thrust fault.
58
DOwqh
Dp
58
RMT
78
sm
RI
DSw
Qal
Teir
DOwcs 32
72 Teir
DOw
cs 38
DOw
cs
Tmc DOw DOw
smf
4534
Tmc
DSw
Tmc
4534000mN
25
OP A DG L E
27
26
5600
Jil
DOwqh
48
DI PP
DSw Qal Tmc
ER
Tmc Tmc
57
26
Teir 48
Dpcsh Dp
T
25
T LIT
LE
DOwqh
Jig
80
Jig
DOwcs
csh
5700
Dpcsh
AU I F IT AP W
Jig
DOw
qh
Dp
Drc
csh
44
Jig
Jig
DOwqh
40 57'30"
DSw
Reverse fault Showing dip, teeth in upper plate. Solid where continuously exposed, dashed where inferred, dotted where covered.
DOwqh
54
Drcsm
52 Jig
#9 UL FA
DOwqh
Jig 30
30
smf
Drcsm
#6
T UL FA
BO LO
0 600
#3 FAULT
N GE
00 56
LT
Y LA A SP CAROR E ST TUS WE ICLIN AN T
smf
DOw qh
Jig 83
62
Mark Goings, John J. Renas, and Susan Tingley, cartographic compilers
00 58
22 8
R REINDEE
BU BA
Dp
DOw
Teir
81
DOw
T UL FA
Tmc
34
Jil
D
ke
Tmc
R MT
Tmc
5900
D EE
Jil
56 00
70 Teib
U
DSw Jil
NE 70
U D
O
DSw
Jil 45 Ovi DSw Ovi
DSw
DOw
57
43
DOw DOw cs
38
csh
K-
U
D
DSw
0 57
0
Anticline axis Arrow indicates plunge direction, showing plunge angle in degrees. Solid where continuously exposed in pit walls, dashed where inferred between outcrops, dotted where covered.
10-20 overturned
36
BUZZARD FAULT
Jig 77
qh
42
33
FAU LT
30
Teir 45
34
12 Jil
48
RMT
56 00
SE
40 57'
Jil
DSw
Ovi
Jil
DSw Jil
Tmc
DSw
DSw
Tmc
Ovi
Tmc
PA Y
Qal
50 52
MT R
Tmc
DOw
Qal
5500
Teib
Ovi
Tmc
32
Dp
cs Teir 28 18
Dp 62 Dp
csh csh
Jil
Teir
Jil
40
DSr1 70 Dp
22 csh
Qal
Tmc
DSw
4533
DSb Jil
Ovi smf
Qal
Tmc
70
75
65
56 00
70
33
Jil
T37N
580 0
Tmc
590 0
Drcsl
DSb
Jil
Dee Mine
Qal
Tmc
l l l l l l l l l l l l l
Qal
Tmc
Hornfels margin Ticks on hornfels side.
4102'
DOw Teir
RM T 40
PAYRAISE SLIDE
42
ss
56
Jig
DOw 82
Teid
72
62
4533
Qls
Drc
ss
85
Drc
sm
Drc
Dp
45
58
Jil
Tmc
Genesis Mine
smf
40 57'
RA I
RO TU AR
DSw
Drc ss 80
79
79
D IK
E
An n
e
di
34
DSr2
Drc
ss Dp
DOw
DOw cs
Dp
Dp Teir
e dik
83
78 Teid
0 52
KRINGLE
0
Jig DOw
67
SCALE 1:24,000
5700
EN
D
ADO LOR CO
Qal Qal
DOw
qh
Jig
55 69
40 Drc
Jil
A #9
ss
DSw
Jil
Jil 75
34
35
Tmc
Qal
36
Syncline axis Arrow indicates plunge direction, showing plunge angle in degrees. Solid where continuously exposed in pit walls, dashed where inferred between outcrops, dotted where covered.
83
Teir
Teir
41
Teir Teid
540 0
Dpcsh
Jig
Tmc DOw
cs
0 0 400
2,000 800
4,000 1,200
6,000 feet 1,600 meters
Z
5700
Drc
sm
61 DSr2 61
61
FA U
LT
T UL FA
DOw
55
DOw
40 67
E OIS E QU IN TUR TICL AN
00 57
CONTOUR INTERVAL 100 FEET
map area
0 560
4102'
smf
DSb
Dp
Jil
Teir
Dpcsh
LO
51
BO
Tmc
0 60
5500
Tmc
T36N
Teib
Drc
ss
DOw
40
Teir
Tmc
LT
#3
DSw
55 00
Ovi
FA U
DSw
4542
5
smf
Tmc
Jil Jil
CORONA
DSw
LT AU
See accompanying volume for references. See plate 3 for cross sections.
4542
Teir Drcsm Qal Teir
Drcsm
Dp
36
Drc
ss
Teir 57
Jil
31
NEVADA
Jil
57 00
RZ
Jig
F AU LT
Tmc
5700
3
smf
5600
40 56'30"
FA
Tmc
UL
DSb Dp Drc sm DOw
landing strip
Tmc
85 60
80 85
50 40
55
DSw
DSw
UL D
Tmc
Qal SOh Tmc DSr3 DSr4 SOh
540
ER
0
Qal
Dp
DSb
sm
Jil
70 40 70 20 50
50
12
0
BO
Drc DSb 75
54 0
DSb
30 20 5 16 Qal
Jil Jird
smf Jil
Tmc
Jil
65 85
Ovi
74 65
Ren Mine
Jird
58
00
smf
Drcsm
53
68 Drc
ss
20 65
Dp
#4
65
Jil DSr4
Tmc
09
Tmc
60
N GE
40 56'30"
T
DSw
DSw
40
5700
Capstone Mine
2
54 0
50 60 35 25
1
DSw
0
Jird Dp Jird
Dp
85
580 0
Ovi
Qal
West dump
ss
Jil Teid
W
Qal
Qal
DSw
Drc
Jil
csh
82 Dp
OL F
smf
Drc ss 55
FA U
Dee Mine dump
REN
Tmc
Tmc
DSw
80
LT
DSw
Y LA SP
DSw
75
5800
00 57
Ovi
Ovi
DSw
This map has been prepared to depict general geology. The locations of section lines and surface mine facilities are approximate and should not be relied upon for any other purpose.
Teir Teir
DOwcs
62
RM T
38
#6
Dp
ISE E UO L I N RQ IC TU ANT AULT F #3
30
Jil
F AU
00 55
4532
57 00
FA U
55 0
BOOTSTRAP FLT
Qal
Bootstrap Mine
0 54 0
Tmc
smf
18
Jil Ovi
0
smf
15 42 DSr3 25 25 Qal Dp
Qal
Ovi
77 85
#10
Tmc
smf
DSw
smf
Tmc 45-60
Qal
0
Tmc Tmc
200
400
600 meters
Teid
Teid
Teir
LT
DSr3
25 DSb
18
42
Ovi
smf
DSw
Drcsm
62 00
Mtn
Jird
85
85
67
Jil
DSw
0
1,000 5
2,000 feet
T RM
Teir
60
Dp Jil
Jil
4
61 00
00 45 63
75
6000
00 58 Round
00 56
20
30
83
Ovi
SCALE 1:12,000
Drc
ss
DSr2
27
72
smf
4532000mN
54 00
5500
F
Dpcsh Jil
76 75
LT
AA
FAULT
68
Jil
47
smf Jil DSr3
15
DIKE
DSr2
G ID W E
Dp
Dp
RIDGE FAULT
Teir
70
Tmc
Jil
smf
DSr4
Surface mine facilities
QUATERNARY DEPOSITS
Qal
Ovi
11622'
554
R49 E
R50E
Blue Star Subdistrict (Genesis Mine Area)
Jil
E OT OY UL FA T
Drc
ss
DSr3 Jil
68
15
Alluvium Streambed and floodplain silt, sand, and gravel. Landslide deposits Deposits on steep slopes and washes in Richmond Mountain area and in mine areas.
PP
LT FAU
BE
Jil
85
UL FA
U LT T FA AS
Teir
Qls
T
70
C
Dp
MIOCENE IGNEOUS AND SEDIMENTARY ROCKS Carlin Formation Weakly consolidated alluvial, lacustrine, and tuffaceous deposits; weathering gray, tan, and white. Includes interbedded coarse gravels, gravel with tan, tuffaceous silty matrix, and tuffaceous siltstone and sandstone with a high proportion of glassy, gray ash containing pumiceous shards. Thickness up to 700 feet (210 m) in Little Boulder Basin and greater than 2,000 feet (600m) in Boulder Valley. Deposits fill subsidence structures in the Genesis and Dee pits and along the Gen fault, and are cut by reactivated faults of the Post-Gen fault system. 40Ar/39Ar dates from Fleck and others (1998) are 14.4 to 15.1 Ma. Gravel layers on west side of Little Boulder Basin contain gold-mineralized clasts.
Tmc
R ARO TUSC I ANT
EAST
Tmc
A
NULL
B OUNDING
DOw
4540
10
11
DOw
DSw
T RB AN
Tmc
REN
DSr4
Tmc 80 Ovi Tmc
Teir
F A UL T
12
Teid
9
550 0
00 60
11622'30"
556
553
11622'
558
554000mE
11621'30" 11618'
4540
LINE NTIC A A TAR
FA ULT
Tmc
smf
DSr3 Tmc
Drc
sm
Tmc
DOw
11620'
EB FAULT
DOw
smf
Dee Mine tailings pond
Tmc
Qal
75 25 Ovi 50 Tmc 55
55
Tmc
Tmc
80
Qal
570
0
R50 E
6200
R51E
18
OID FLT
70 22 40-70 Jil
Jil
Tmc 50
Tmc Ovi Jil
00
PE R
Jil 25 Jil
JAS
Dp
50 70
Drcsm
Qal
45 Ovi 40 35 50 Jil DSw
OS AL SH
60 45 80 35
50 Ovi 15 40 Ovi
Tmc
Tmc
60 00
60
Tmc
64 00
17
DSr3
DSr3 25 55 45
Tmc Qal DOw
Ovi 65 80
00 54 25
E ICLIN
5600
10
DOw
11
12
55
Rhyolite lavas Felsitic to glassy rhyolite lava flows, locally flow-foliated and spherulitic, containing about 5% quartz, Fe-olivine and sanidine phenocrysts in an aphanitic groundmass. Overlie or are interbedded with Carlin Formation in Boulder Valley. K/Ar date of 14.6 Ma from Evans (1974a). Unit interpreted as correlative with rhyolite of Marys Mountain, dated at 15.2 Ma (Henry and Faulds, 1999).
Tmr
5300
T UL FA
Ovi
620 0
EOCENE IGNEOUS ROCKS Rhyolite dikes White to light gray, weathering white to light brown. 0-40% phenocrysts of plagioclase, biotite, quartz, sanidine, and/or biotite in a microcrystalline quartz-feldspar, or locally glassy, groundmass. Includes: the rhyolite of the Beast dike and Gen fault zone, with distinctive 4-30 mm rounded, resorbed quartz phenocrysts; and aphyric, microspherulitic, high-silica rhyolite dikes of the Deep Star and Genesis mines. 40Ar/39Ar dates are about 38 Ma (rhyolite of Deep Star) and 37.3 Ma (rhyolite of Beast dike) (Ressel and others, 2000a).
Teir Teib
53 00
Tmc
Drcsm
?
W
Jil
Drc
sm
30
Drcsl
0 530
50 DSw 80 DSw 20 80 25 Ovi 54 70 Teid 60 Teid 85 Ovi 55 75 70
40 DSw
35 75 Ovi
L
80 50 DSw 65
G N O 50
Tmc
Ovi
RA IN BO
FAULT 0
55 0
DSw
75
TARA
Cre ek
4100'
20
Jil
65
Dp
SUB TLE
15
Qal 70 65 55
Jil
Drcsl
30
50
30
Dp
TARA
80
14
Ovi DSw 50
10
65 50 Ovi DSw
640 0
Jil
Drcsm
Tara Mine
55 Ovi
12
35
30
Jil 50 50
Ovi 70 Jil 60 Ovi 70
Tmc 60 70 25
50
Meikle Mine
smf
D BUZZ A R
5800
58
00
DOw
00 60
0 62
0 550
0
Elko County Eureka County
DOw
4100'
FAUL T
80
70 85 Jil 25
70
43 0 DSw Ovi540
5600
DOw
KY
Qal
Drcsm
70 Ovi Tmc
Ovi
Bell
Drcsl
70 35
Teid
Jil 60
30 Tmc
13
16
75
5500
Tmc
15
C re
45
14
DOw
6600
13 19
6500
58
Ovi
DSw 30 Ovi
50 Qal
57
Ovi 50 54 DSw
Rodeo Mine
5400
LT
Basalt dikes of the Dee Mine area Olivine basalt dikes dated at 37.6 Ma (unpub. data, M.W. Ressel).
5400
E
4538
0 52 0
DOw
0 530
70
30
5300
SH
65
ush Br
ek
Qal
S
Tmc
Qal
T UL FA
Tmc
Drcsl
10-15
Tmc
Qal
PE
S CO
T UL FA
Qal
Ovi
65
75 5300
Qal
Tmc
smf
0 560
00 57
65
RD
FA
WE I
60
ST
Tmc
Tmc
75
U
RM T
T
Drc
ss
RA NG E H ILL SIDE
Qal
Ovi
40 50
'S IL Y EM
sm
Drc
R
Betze-Post Mine
OD EO
DOw
5800
DOw
60 00
Drcsm
Tmc
65
4538
Dacite and rhyodacite porphyry dikes Includes plagioclase-biotite-hornblende dacite and plagioclase-biotite-quartz rhyodacite dikes of the Genesis, Betze-Post, and Meikle Mines, and the K-dike at the Genesis Mine. Dacite dikes are dated at 37.8 to 39.2 Ma from Betze-Post and Meikle (U/Pb and 40Ar/39Ar); glassy rhyodacite dikes at Genesis and Betze-Post are 39.1 to 40.1 Ma (Arehart and others, 1993b; Farmer, 1996; Mortensen and others, 2000; Ressel and others, 2000b). Includes biotite-feldspar porphyry "bfp" dikes and Betze dacite of mine terminology.
Teid
L
I
HE ID
E CLIN ANTI
ST PO
U FA
O AL
Y K
JURASSIC IGNEOUS ROCKS Lamprophyre dikes Dikes of mafic to intermediate, calc-alkaline composition with phenocrysts of mica, amphibole, and probable pyroxene or olivine. Mica-bearing lamprophyres contain abundant phlogopite in a fine-grained groundmass of phlogopite, potassium feldspar, quartz, apatite, and carbonate minerals. Hornblende lamprophyres contain magnesian amphibole in a groundmass of plagioclase, quartz, apatite, and carbonate. Xenocrystic quartz inclusions (3-5 mm) are common. Included are dikes recognized as porphyritic monzodiorite near the Goldstrike intrusion. Includes lathy latite, microdiorite and meladiorite dikes of mine terminology. Alteration to chlorite, sericite, pyrite, quartz and carbonate minerals frequent. Dikes typically strike NNW and define a 10-mile (16 km) long dike swarm centered on the Post-Gen fault system. K/Ar and 40Ar/39Ar dates range from 156 to 158 Ma (McComb, 1995a; M.B. McComb, NMC, unpub. data, 1991; M.W. Ressel, unpub. data). Lamprophyre dikes cut the Goldstrike stock. Altered lamprophyre dikes commonly gold-mineralized in deposit areas.
Jil
T FAUL LT J-3 FAU R ULIA P EC
RD ZZA BU
FA ULT
JB
JB-3
Ovi
Qal
45
Ovi
smf
C R E
A AM AND
70
E L O NG
Drcss Drc
sm
5000
Drc
sm
Dp
Tmc
6000
K
23
6200
22
Tmc Qal
23
24
54 00
Drc
ss
Dp Dpm Dp DSr2 Dpm
60
DOw Dpm
JE
D AN
D IL
21
65
DETO NA TO R
Tmc
A'
22
00 64
E
24 30
5300
G R
Ovi Drcsm
W
Drc
sm
Drcss
BA Z
0 LON 450
KS
DSr2
R
DOw
O D EO
Tmc
5500
00 52
A
Tmc
Ovi 65
RM T
Drcss
Dp
LAC
AN
Dp
80
70
DOw
570
K EE R C
0
ZA
Dp Drc
M AR
smf
Jig
-3 JB
DSr3
JB
DOw
T UL FA BE CU L RO E NT IC CO T AN OST SS RM P LO DO
Drcsm
OS AL SH
sm
Dp Drc
ss
csh
D
6500
IN K Y
4536
sm
Dp Drcsm
csh
45
D
DOw
75 75
5100
52 00
Drcss
550 0
Jig
75 60
UND
60 00
RKE Y
Drcsm
Jig
55
ek
54 0
C re
smf
5900
EL
TU
Jig
D
0
IN
KY
6800
Tmc
smf
HA ER
N
Jig 65
DE
INS IDE
50
GO
CARR OLL
LDS 35 Jig TRI EX TR KE A STO CK
75
Jig
00 57
DOw
6600
40
70 40
WICKED
55 00 Tmc
6400
Qal
Drc
R IN K Y
50 Jig 50
DSr3
DSr3
FRA UD
75
smf
Qal
00
Jig
50
JBE
40
00 62
5800
4536
0 680
Granodiorite and quartz diorite of the Goldstrike, Little Boulder Basin, and Vivian intrusions Compositionally variable stocks, dikes, sills, and silllike larger masses including the Goldstrike stock, the LBB stock (covered beneath Little Boulder Basin), the Vivian sill, and dikes and sills of the Genesis and Betze-Post mine areas. Rocks are mostly equigranular and contain plagioclase-hornblende-biotiteclinopyroxene-quartz K-feldspar, with accessory sphene, epidote and apatite. K/Ar, 40Ar/39Ar, and U/Pb dates from the Goldstrike stock fall in the range 157.2-159.1 Ma (Arehart and others, 1993b; Mortensen and others, 2000). Goldstrike stock hosts significant gold mineralization at Betze-Post deposit.
Jig Jig
L
KY
it
tl
e
0 660
POWER
FU L
6500
5500
5700
5800
5800
27
26
25
smf
28
smf
5700
e
4058'
5900
o u ld
00 59 000 6
27
26
smf
25
68 00 66 00
r
4058'
620
6400
smf
B
smf
Tmc
31
0
5900
Porphyritic rhyodacite dikes Plagioclase-biotite-quartz phyric rhyodacite dikes of Bootstrap, Capstone, and Ren Mine areas. Similiar dikes recognized in Meikle and Lantern Mines and Golden Zia area west of Genesis Mine (not mapped). K/Ar and U/Pb dates range between 157.4 and 159.3 Ma (Mortensen and others, 2000; Ressel and others, 2000b; M.W. Ressel, unpub. data). Dikes are commonly altered to quartz, albite, and muscovite. Monzonite dikes of mine terminology.
Jird
Bo
AC GL ON BUZZARD FAULT
D
0 640
ul
de
B
5800
RE IN D
smf
EE R
DOwqh 70 Jig 74
DEEP STAR
y
Jig 72
e
ll
51 00
5600
56 00
5300
82
58 00
Jig
DOwcs DOw
qh
DOwqh
POST
74 72 75
74 Drcsm
smf
DOw
00 69
DOw
6600
50
6000
T36N
Jig
28
RIS LA PO 78
85
Deep Star Mine
North dump smf
Qal
PALEOZOIC SEDIMENTARY ROCKS Rocks of Roberts Mountains Allochthon Western siliceous assemblage (Devonian, Silurian, Ordovician) Structurally interlayered sequence dominated by siliceous mudstone, chert and siltstone. Includes lenses or layers of greenstone, black and green chert, shale, silty limestone, sandy limestone, sandstone and quartzite. Dark, commonly carbonaceous to pyritic rocks weather brown, tan, and light to dark gray. Commonly cut by pervasive to distributed, brittle-ductile foliation or shear fabric bounding centimeter- to meter-scale lenses. Locally contactmetamorphosed to brown quartz ( biotite-K-feldspar) hornfels and gray-green calc-silicate hornfels. Hydrothermally silicified (as jasperoid and silicified mudstone) along faults and over wider areas. Thickness to >8,000 feet (2,400 m) in Tuscarora Mountains. Fossil collections by Evans (1980) and Cluer and others (1997) have Ordovician and Silurian ages.
DOw
00 56
r
#9
Jig DOwqh
a
48
FAULT
48
6800
4534
59
Jig
I IT AP W
5700
Jig
INM F
e
5300
DOw
Jig
smf Section 36 dump
DOwqh
RMT
r
55 0
580
65
60 00
ld
5900
u
52 00
o
Tmc
GOLDSTRIKE STOCK
77
80
79
DOw
79 d ne di An
K-
ik ke e
5200
34
35
DOwqh
80
Teir Dp
83
0
DOw
8
0
64 26
GRA V ELL Y
Drcsm
DOwqh
78
44 80 62
smf
58
58 Teir
#3
72
Tmc DOwqh
64 00
64
6400
40 M o u 6n t a i n s 0
V
00
Tmc
5 50
0
52
#6
Jig
30
Jig
DOwqh
North area leach pad
Basin
25 80
6200
GEN
0 600
Tmc
4534
RM
T
00 56
Dp
22
DOw
00 66
0 540
00 58
36
33
A
csh 30
34
12 DOw Tmc Jig
00 62
B
Teir
540
78
Teid
0
52
00
smf
5700
LBB STOCK (in subsurface)
00 57
35
Qal
45 52 10 28
36
6800
56 00
52
DOw
cs
65
83
Teir
33
00
BUZZARD FAULT
6
Dp
Undifferentiated siliceous mudstone, chert, siltstone, shale, sandstone, and quartzite. Silty or sandy limestone; light gray. Quartz (+/- biotite-K-feldspar) hornfels; brown. Calc-silicate gray-green. hornfels; Greenstone; amygdaloidal, chloritic mafic igneous rock.
#9
csh Jil
DOwcs
Dp
Teir Qls
PAYRAISE SLIDE
590 0
11626'
548
550
11624'
DOwqh DOw
Drcss 56
85
Drc
sm Teid
62 Dp
BO LO
DOw
62
6500
11626'
11624'
RM T
Drcsm
36 75 80
Drc DOw
cs ss
Dp Jil
ISE UO E RQ LIN TU TIC AN
smf
Jil
5800
60 00
rora
R ID
62 00
S IX
57 00
Teid
BI G
Dee
Gold mineralization
81
75
Jil Dp
Jil 70
75
FO UR
Teid
Drc
Teir
Dp
sm
60
00 63
R
70
50
5600
DOw
66
61 0
0
DSr4
Teir
o
d
00 68
DOw
sca
5
DSr2
4
6000
Storm (Rossi)
4532
1
27
smf
- LY
70
CO RN
Teir
NN
smf
ER S
Santa Renia Fields 7.5' Quad
Index map showing Carlin North Area gold deposits and other mineralized occurrences in red (Teal and Jackson,1997a; K. Bettles, 2001, pers. commun.), geologic mapping sources in black, and U.S. Geological Survey 7.5-minute quadrangles in blue.
62 00
55 Jil 53 68
Dp
DSr3
DSr4
OR
Index of Geologic Mapping
Qal
Qal Teir
Teir
Dpcsh
68 csh Jil 75 7682 Dp Dp
South dump
Mill 4-2 tailings impoundment
Tmc
27
Jig
45
T35N
42
51
Dpcsh
Jil
Teir
Jil
Genesis Mine
smf
DOwqh
36
68
DOwsl
00 68
00 66
Jig
6600
DOwqh DOwcs DOwg
0 580
ONY TIM AN
DOw Dp
Jig
VIVIAN SILL
7000
CO R
FA UL T
Teid
Drc
ss
15
FA UL T
00 55
38 65
5800
Jig
00 Drcss 58 Dp
West dump
smf
Drcsm
Tmc Jil DSr3
Drcss
68
Tmc
Beast Mine
00 64
Jig
DOwqh
35
0 720
45
U FA
LT
DOw
7000
R
RI DO
0 660
Qal
DOwqh
6600
Jig
40 75
6800
R
00 64
3
2
1
4532
Slaven Chert and Elder Formation (Devonian and Silurian) Differentiated from Ordovician rocks in northern part of map after Cluer and others (1997), G. Cleveland and V. Spalding (written commun.), T. Theodore (written commun.), G. Griffin (personal commun.), and T. Chadwick and P. Dobak (personal commun.). Includes gray-green dolomitic siltstone, dark gray shale and chert, feldspathic siltstone and sandstone, and micaceous mudstone (Elder Formation), and green, gray, and black chert with shale and argillite partings (Slaven Chert). Graptolite collections confirm Silurian age of lower part of sequence.
DSw
RIDGE
CO
A AROR INE TUSC I CL ANT
5900
GEN
LT FAU
Capstone Bootstrap Ren West Ren
0
1
2 kilometers
00 52
11622' 11620'
Meikle
Tmr
DOw
68
68
RM
70 75 62 57 74 25 57 Teid 60 Jil
BARITE FAULT
47
S. B
Teir
EA ST
Banshee
Tara
41 00'
South Meikle West Griffin Griffin
61 55
EF
UN DI N
FA UL T
W ES
BA SI N
FO UR C
Betze Screamer Bazza Point West Bazza Shalosky Post
Drcss Drc
81
80 75 30
OR N
5
(Goldbug)
6
Qal
Dp
sm
smf
Jig DSr2
82 Jig 56 25
FA
ER S
Golden April
-B
Barrel
Rodeo
Drcsm
T RM
O
RE
T UL FA
Jig
72
70
Qal DSr4
60 00
Rodeo Creek NE 7.5' Quad
DSr2
75
Lantern dump
Tmc
32
BO UN DIN G
Beaver Peak 7.5' Quad
DOw
FA UL T
4
72
Drcss
71
Teid
Drc
DSr2
85
75
FAUL
2
3
11618'
4056'
Teir 54 00
78
65
81 42
T
DSr4
FA UL T
20
C TUS NE ICLI ANT
re
e
Dp
Teir
Drcsm
Drcsm
RMT
North Area stockpiles
k
JACKSON-LANE
T
65 00
FLT
Tu
1
DOw
65
Jil 78
DSr3
72
48
Tmc
e o
C
75
0 680
0 660
75
52
DOwqh
09
DOw
7
4056'
Vinini Formation (Ordovician) Differentiated from younger rocks in northern part of map after Cluer and others (1997), G. Cleveland and V. Spalding (written commun.), G. Griffin (personal commun.), and T. Chadwick and P. Dobak (personal commun.). Gray, black, and green chert and siliceous mudstone, pyritic mudstone, and graptolitic siltstone and shale. Graptolite and palynomorph collections are Middle and Late Ordovician.
Ovi
T RM
6200
00 59
Jil
LOBO
DSr4
DOw
38 22 18 28
6500
6400
interpreted thrust fault Marys Mountain sequence(?) (Devonian) West of Richmond Mountain, allochthonous, fault-bounded lens of gray limestone with chert lenticles and interbedded chert. Thickness up to 400 feet (120 m). Questionably correlated with the Devonian-age Marys Mountain sequence on plate 2.
Dm
T FAUL
' C
G
T
Tu
E LE
sm
6200
48
B'
DOw
75 36
66 00
Lyn 25 n
00 62
DOwsl
23
LL VI E
LE ST CA
T UL FA
sc
78
Drcss
0 64
0
O DE RO
60
Jig DOw
36
C
31
Drc
23
55
re e
k
6000
Roberts Mountains thrust fault (RMT) Rocks beneath Roberts Mountains Thrust Rodeo Creek unit (Devonian) Dark gray siliceous mudstone and chert, with regular, 2- to 3-cm-thick beds separated by thin, planar partings. Interbedded with lenticular packets of medium-grained quartz sandstone (especially near base of unit), and gray, planar-laminated silty limestone. Silicified basal sandstone is evidently decarbonatized sandy limestone and calcarenite, and silty limestone is widely decarbonatized to porous siltstone. Thickness 100700 feet (30-210 m); top truncated by Roberts Mountains thrust. Faunal collections by Ettner (1989) indicate Late Devonian age. Silicified basal parts are local gold hosts.
Drcsm
ar
or
K EE CR
0 600
5800
Deep Post
Bazza
Long Lac Winston
40 58'
54 0
76
7
North Skarn Hill Skarn Hill
West #9 North Star NW Genesis Bobcat Blue Star Widge Deep Star
4530
Jig
FOOT
84
Jil
CO W
0
81
UL 82 T
76 86 80
72
23
43
80
Dp
52
83 72
Antimony Hill
Geologic Mapping Sources
Note: Folios cited are layered map sets at various scales from Newmont Mining Corporation files, which include outcrop and interpretive surface geology map sheets. Folio boundaries are not representative of property boundaries or land ownership.
Payraise
Qal
DOw
Teid
DSr4 DSr2
HAR DIE
Golden Zia
Genesis
81 RS T 84 FL 76 T 64
20
#9 F
Jil
DOw 56 80
CA
DOw
24
FAU LT
Drcsm
76 52
61
E.
HO
Tmc
58 00
43
34
DOw
00 62
CO
PP
ER
N STO
E
TH
Rodeo Creek NW 7.5' Quad
8
Tmr
DOw
85
DOw
6400
6600
RU ST
12
8
sm
DSr2 DSr3
90 73 84
80
9
Teir
Lantern Mine
10
11
DOw
35 40
T UL FA
12
DOwg
38
0 680
a
00 56
DOw DOw
0 640
26
18
4530
5100
E'
p " s 00
Drcss
N TER LAN
25
80
DSr4
65 90 86
FA
HIGH GRADE FAULT
59
ST LE
42
6200
DOwsl DOw
LEEVILLE FAULT
35
41
DOw
DOw
43
FA UL T
58
Siliceous mudstone and chert, with minor interbedded sandstone and silty limestone. Quartz sandstone and calcarenite. Silty limestone of Tara Mine area.
56
LE ST CA
T FL
TUSCARORA ANTICLINE
EF RE
T AUL
u
65
40 56'
10
Blue Star Ridge
Beast
12
Four Corners
Turf
14
Tmr
Big Six
Tmr
Drcsm
Dp RE
63
66 68
56
80
DSr4
41 85
EF
smf smf
28 80 DOw
DOwg
LT U
" r500
SOh
75 72
Drcsm Mill #1 DOw Drc sm 00 60 64
80 70 40
Drcss Drcsl
600
5
DG BA
GEN FAULT
0
ER
DSr2
South Lantern
r eek Canyon
9
16
BullionMonarch (Universal Gas Pit)
5700
NW Extension
15
West Leeville Hardie Footwall
Qal Tmr Dp
61 58
Jig
72
BO WL
North Lantern
56
31
57 53
DSr2
600
FA UL T
13
5200
5400
00 58
80
Carlin tailings impoundment
6000
LT F AU
78 18
F LOBO AULT
52
Dp
Jil
Jil East Pit
70
DOwg
50
DSr3
35
0
Carlin dump
Dp DOw Dp
71 34
Carlin Mine
DOw 39
60
MILL FAULT
RMT
17
Carlin West
Carlin East
19
Carlin Fence
13
17
16
56 00
56
43
6200
60
DOw Jil
39
Dp Jil
Dp MID W AY DSr 4
65
CA NY
1. Chadwick, T. and Dobak, 11 P., 2001, Map of the DeeRossi Mine area, 1:2,400, Barrick Gold Exploration Inc.; Theodore, T., written commun. 2. Teal, L., 1995, Hope Springs folio, 1:2,400. 3. Kofoed, R., Coombs, L., Everhart, P., and Malan, P., 1995-1998, Bootstrap folio, 1:2,400; Malan, P. and Jory, J., 1999, Capstone-Bootstrap-Tara interpretive geologic map, 1:2,400. 4. Cluer and others (1997); Cleveland, G. and Spalding, V., written commun.; Moore, S. and Teal, L.,1992, Ren Joint Venture folio, 1:2,400 5. Edwards, J. and Cuffney, R., 1995, East 20 Tara folio, 1:2,400. 6. Evans (1974a) 7. Griffin, G.L., and geologic staff of Barrick Goldstrike Mining Corporation, 1990-2000; Thoreson, R. and geologic staff of Newmont Mining Corporation, Post subdistrict, 1990-2000; Teal, L., Theriault, B., and Zimmerman, J., 1994, Bell Creek folio, 1:6,000. 8. Penick, M., Rahn, J., and Barrick Goldstrike Mine geology staff, Betze-Post Geology Map 1999, 1:2,400. 9. Grusing, S., C. Cornejo, P. Dobak, M. Doyle, P. Everhart, D. Harris, M. Jones, J. Jory, K. Kunkle, M. Orobona, K. Paul, J. Powell, L. Schutz, A. Sweide, W. Trudel, and C. Williams, 1999, Blue Star-Lantern geologic map, 1:3,600. 10. Teal, L., and Harvey, B,, 1991-1992, North Spur folio, 1:6,000. 11. Harvey, B., 1991, South Spur folio, 1:6,000. 12. Lisle, R., and Mohling, J. 1995-1998, North Lynn folios, 1:1,200.
DSr3
DSr4 SOh
54 47 12
Oe
52
15
64
DSr3
44 44
DSr3
West 85 Pit
14
DOw Drc
75
DIE HAR
P IN MA
0 600
60
DSr4
Carlin East Mine portal
DOw
C R O W
5800
73
88 34
Jil
DSr4
55 58 77
68
DSr4
60
0 620
60
6000
FA U LT
Island
5500
40 54'
18
Jil 79
54
C
Tmr
Qal
Dp
56
DSr4
DSr4
smf
640
Perry
Pete
CA 70 ST 65 LE 77 Dp RE 73 EF DSr3 FA UL T
Jil sm Main Pit
34 50 75
89 70
Jil
13
Carlin dump
smf
0
0 600
58
70 50
00 63 25
45
DSr4
50
35
70
im
42
18
60
on
65
0 580
84
C re 72 e k
30
19
DOw
Popovich Formation (Devonian) Medium to dark gray, carbonaceous silty limestone, micrite, and calcarenite deposits of basin slope environment. Subdivided in mine usage in Carlin North Area into three subunits: Dp2 (lowermost): thin-bedded to planar-laminated silty micrite with thin calcarenite to calcisiltite interbeds; Dp1: medium-bedded to massive micrite with distinctive soft-sediment slump and flame structures; Dp0 (uppermost): planarlaminated silty limestone with pyritic laminae, calcarenite and limestone conglomerate. (Subunits not differentiated at this map scale; see volume articles for additional detail.) Metamorphosed to hornfels near Goldstrike stock. Total thickness 400-800 feet (120-240 m). Early to Middle Devonian age (Evans, 1980; Armstrong and others, 1998). Units Dp2 and Dp0 are commonly gold hosts.
Dp Dpm Dpcsh
540 0
KE DI
IT
DIK E
S
#6
0 620
C
R
F
4528
5000
e
PA
p
RA
5400
LLE
5600 Oe
FAUL T
Qal
Qal
Sh 72
82
e
L
Oe
5 60
30
5800
0
DSr4
61 34
Carlin dump
42
21
65
60
0 620
Undifferentiated silty limestone, micrite, and calcarenite. Micrite of subunit Dp1. Calc-silicate hornfels.
00 60
ET W FA T UL
Drcsm
RM
22
4528
AU EF ILL EV LE
T
40 52'
Welches Canyon 7.5' Quad
4054'
490 0
Qal
ep he S
Creek
00 51 Tmr
62 00
DSr4
SOh
DSr4
0 610 DSr4
57
LT
Dp
35
DSr4 Qal SOh
34
Drcsm DSr4
00 64
4054'
Tmr Qal DSr4
SOh
13. Knight, D., 1992, North Lynn folio, 1:6,000. 14. Teal, L., 1994, Antimony Hill folio, 1:2,400. 15. Groves, D., Bell, P., Cole, D., Jackson, M., and Koehler, S. 1993-1996, High Desert Venture project folios, 1:1,200. 16. Jackson, M., 1994, Castle Reef folio, 1:1,200. 17. Moore, S., 1993, Rita K folio, 1:2,400. 18. Myers, I., Jory, J., Malan, P., Morrison, D., and Powell, J., 1992-2000, Carlin Mine map, 1:1,200; Myers, 1993. 19. Hunsaker, B., Grusing, S., Koehler, S., and Kofoed, R., 1993-2000, Roy folio, 1:2,400 and Pete Deposit map. 20. Moore, S. and Malan, P., 1994-2000, Richmond Northwest folio, 1:6,000; Evans, 1974a. 21. Teal, L., and Malan, P., 1996-2000, Richmond Northeast folio, 1:6,000.
6 60 0
540 0
24
20
Tmr
Tmr DOw
21
JO E
SOh DSr4
DSr4 00 59
0 600
65 00
21
DSr2
00 65
62
CA
00
RE EF
Dp
70
Dp
51
5800
41
22
38
SOh Oe Oe
40
24
STL E
68 00
23
41
24
0 66 0
F AU LT
68
DSr4
DSr2
Bootstrap limestone (Devonian, Silurian) Massive light gray bioclastic limestone, biosparite, and ooid packstone and grainstone deposited in shoal environment and containing coral, pelmatozoan, brachiopod and bryozoan faunas (Armstrong, and others, 1998). As defined by drilling and exposures in mine areas, occurs as a wedge of shelfal facies in north part of map area, overlapping the lower Roberts Mountains Formation, and overlapped by the upper Popovich Formation. Wedge thickens northeastward to >1,000 feet (300 m), as indicated in drill holes. Unit is a lateral equivalent of slope-facies subunits DSr3 through Dp1. DSb unit is locally a gold host where cut by major structures.
DSb
6 0 00
F A UL
Teir
55 00
T
5200
0 560
0 580
53 00
48
Tmr FA U Drcsm LT
SOh
18
SOh
41
6800
30
640 0
R49 E
25
R50E
54 00
55
Dp
DSr4
58
SOh
00 68
SOh
SOh
62
00 65
DSr4
24
700 0
DSr4
SOh
34
Qal
DSr4 DSr4
00 65
ON
42
35
Oe
48
SOh
Tmc
55
4526
552
Tmr
DSr(?) Dm (?)
34
Roberts Mountains Formation (Devonian, Silurian) Planar-laminated, gray, carbonaceous, slope-deposited silty limestone sequence with interbedded, centimeter- to meter-scale turbiditic deposits of calcarenite to biogenic debris-flow breccias. Mine stratigraphy subdivided into four informal, mapped subunits shown below. (NOTE: This definition of Roberts Mountains Formation embraces transitional upper subunits DSr1 through DSr3 which were included within lower Popovich Formation by Armstrong and others, 1998). Tectonic slice of DSr(?) questionably above interpreted thrust fault west of Richmond Mountain. Fauna indicate Silurian to Lower Devonian ages (Evans, 1980; Armstrong and others, 1998). Upper DSr units, especially DSr2, host large, stratiform gold deposits in the North Area. DSr4 is a major host near some larger structures.
4526
6000
00 62
6400
D'
RMT
00 54
CRE EK
11619'30" 557000mE
11619'
DOw
Jil
40
558
Drcsm
11618'30"
DSr4
WEST LYNN FAULT
EP
Carlin Mine Area
SCALE 1:12,000 0 0
4529000mN
90
S HE
35
DOw
90
90
Drcsm Dp
40
DSr2
58 00
73 45
33
58
Oe
6800
Qal
C
SOh
32
45
45
Oe
DSr1
Silty limestone, planar-laminated to bioturbated; gradational from DSr2 to lower subunit of Popovich Formation. Silty limestone, bioturbated and wispy-bedded with silt-filled, bedding-plane faunal burrows. Silty limestone, laminated to bioturbated, with 5-50% debris-flow interbeds and lenses, containing allodapic, fossiliferous carbonate shelf detritus. Silty limestone; monotonous, 800 feet (240 m) thick laminated sequence with thin calcarenite interbeds.
60 00
70 0 0
Oe Oe
28
1,000 200 400
2,000 feet 600 meters
DOw Drcsm
52
Jil Dp
87
FA UL T
00 64
70
47
FLT
6200
4529000mN
60
Dp
DSr1-3
33
East Pit
70
50
39
0
28
BO WL
Dm(?) Qal DOw DSr(?) DOwsl Dm(?) Teir
44 89
Qal
6400
DOwg
M o u n ta in
Jil DSr4 Jil
70
29
Tmr
DSr(?) Dm(?)
28
38
DSr4
6000
27
DSr4
35 42
26
18
RIC
O HM
ND
MOUNTA IN 68 FA 0 0U 15 LT
25
25
DSr2
6600
45
LE
E ILL EV
6500
45
DSr3
SOh
66 0
6600
FAULT
T
smf
FA UL
RMT
6200
62
80
Dp
67 Jil
87
75 85
SOh
00 62
Op
Carlin East Mine portal
DSr4
Qls Op Qls
Oe
31
SOh
DSr4
00 68
64
DSr1-3
47 60
20
DSr4
0 #1
65
00
65
58
DSr4
43
DOw DOw Dp DSr1-3
78 71 Dp 34 39
MI LL
Jil DOw 39
34
D HAR
IE
60 85
40 54'30"
40 54'30"
88
Jil
79 77
Jil
60 65
58
4524
CA 70 ST LE
DSr1-3 R E
34
60
Qal
70
Tmr
DOwsl Dm(?) Teir
S WE
40
SOh DSr4
Qal
6600HM
RI
C
ON
D
Dp
EF
65
50 75
DSr4
70
40 52'
DSr4
00 63
DSr4
25
50
FA U
DSr4 73
LT
50
60
35
70
32
Qal
33
80
Teid
DOw
67
DSr4
34
65
58
48
35
LT
6500
Qal
51
T34N
Main Pit
DSr(?)
O M
N
Drcsm
55
77
60
89
60
Qal
sm
TA IN
Dp
West Pit
Jil
34
Drc
88
Ric hm on d
75
DSr4
60
85
0 620
#7
13
Dp
DSr4
F AU L T
47
RMT
68
Jil
34
7000
6800
68 43
31 28
Op
T35N
DOw
14
00 60
DSr4
AY
64
DSr (?)
00
69 0
00 60
0
Qal
00 58
45
Oe
DSr4
#8
Jil
Hanson Creek Formation (Silurian, Ordovician) Massive to thick-bedded, medium gray, locally cherty or fossiliferous, finely bioclastic dolomite, overlain locally near formation top by thin subunits of light gray sandy dolomite and silty dolomite. Crops out as massive gray cliffs in Richmond Mountain area and Sheep Creek Canyon. Thickness 1,060 feet (320 m) (Evans, 1980). Eureka Quartzite (Ordovician) Massive to thin-bedded, homogeneous, light gray to white orthoquartzite, with local lenses of dolomite. Ridge-forming, resistant white outcrops in Richmond Mountain area and Sheep Creek Canyon. Evans (1980) reported a thickness of 1,660 feet (506 m).
Oe
4524000mN
W MI D
0 660
KE DI
0 530
540 0
IN MA
#8A
640
smf
60
DOwg
UN R ICHMOND MO TAI N
T35N
68
Qal DSr(?) Drc
sm
00
SOh
DSr4
58
Tmr
Qal
Op
20
Oe
R50 E
11618'
R51E
560000mE
11619'30"
557
11619'
558000mE
11618'30"
11622'
554
556
11620'
558000mE
RI
42
65
6200
Qal
DOw
DOw
67
Dm(?) Teid Dm(?)
Dp
43
Oe
Op Qls
Op
Qal
CH MO ND
60
DOw
DOwsl
DSr4
63
SU MM
DOw
72
65
SOh
35
Teir
FA UL T
smf
0
DOw
FA U
NW
#5
00 60
PIT
#1
U
#4
00 58
00 56
E DIK
#3
#6
45
36
5600
Teid
Drc
Oe 6800
4052'
55
sm
Dp
SOh
58
660 0
64 00
Op Op
6
IT
Pogonip Group (Ordovician) Thin- to thick-bedded limestone, cherty limestone and dolomite, undifferentiated, in Richmond Mountain area. Minimum thickness about 1,400 feet (430 m).
Op
T
LY
NN
UL T FA
6600
T RM
0 620
6400
6200
6000
Oe
Base map from part of U.S. Geological Survey Santa Renia Fields 7.5' Quadrangle, 1970; combined with aerial and pit surveys by Newmont Mining Corporation. Nevada Bureau of Mines and Geology, University of Nevada, Mail Stop 178, Reno, Nevada 89557-0088 [phone], ext. 2; [e-mail]; www.nbmg.unr.edu
0 620