NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
NORTH CAROLINA GEOLOGICAL SURVEY
Tracy E. Davis, Director This geologic map was funded in part by the USGS National Cooperative Geologic Mapping Program
Dr. Kenneth B. Taylor, State Geologist 83�15' 12'30" 10' OPEN FILE MAP 2012-07 83�07'30"
770000 FEET
35�30'
35�30'
A
STRUCTURAL FEATURES
ROCK DESCRIPTIONS
Zswbw
Zgchu
CONTACTS
Ygg
Great Smoky Group
Zgchu Ygg
Solid line _ located in field to within 150 meters Short-dashed _ location inferred; querried where uncertain
MAP UNITS
Zgchma
Copper Hill Formation
660000
Great Smoky Group
FEET Thrust Fault
(teeth on upper plate)
Zswbw
Undivided (Zgchu) � Thick, interbedded sequence of metagraywacke, schis-
Ygg
tose metagraywacke, schist, granule metaconglomerate and calc-silicate. Zswbw
Zswbw
Copperhill Formation
Metagraywacke is medium-light-gray to medium-dark-gray; medium-to
Zgchu Stratigraphic Contact
coarse-grained; equigranular to inequigranular; foliated; locally migmatitic; locally
Zgchu Undivided
Zgchu
sulfidic; consists of quartz, plagioclase, muscovite, potassium feldspar, garnet, Ygg
epidote group minerals and minor accessory minerals.
STRIKE AND DIP OF PLANAR FEATURES BEARING AND PLUNGE OF LINEAR FEATURES
Schistose metagraywacke is medium-gray to medium-dark-gray,
Observation sites are centered on the strike bar,
15
or at the intersection point of multiple symbols.
commonly stained yellowish-dark-gray; strongly foliated; fine-to medium-grained;
Small Fold Axis Mineral LineationYgg
Zgchma Mylonitic meta-arkose
Foliation Vertical Joint
inequigranular to lepidoblastic; locally migmatitic; locally sulfidic; consists of
Ygg
47
quartz, plagioclase, muscovite, biotite, garnet, kyanite and/or sillimanite, and iron
Slickenlines Crenulation
sulfide minerals (pyrrhotite, pyrite).
Vertical Foliation JointZswbw
Snowbird Group
88
Schist is medium-gray to medium-dark-gray to dark-gray; medium-to coarse-grained; inequigranular; lepidoblastic; thinly foliated; locally sulfidic; locally
Cross Cutting TrendYgg Horizontal Foliation Minor Fault
graphitic; consists of muscovite, biotite, quartz, garnet, kyanite and/or sillimanite,
Wading Branch Formation
34
pyrrhotite, pyrite, graphite, and other accessory minerals.
Zgchu
Granule metaconglomerate is medium-gray to dark-gray; medium- to
Mylonitic Foliation 76 Bedding
75
Zswbw Feldspathic metagraywacke coarse-grained; poorly sorted to graded; subangular to subrounded grains;
Zgchu
granule to pebble conglomerate with a sandy matrix in which the larger grains are
Vertical Mylonitic Foliation 78 Cleavage
usually well sorted and consist of clear to white quartz, white feldspar, and finer
NON-STRUCTURAL FEATURES
blue quartz.
Cartoogechaye Terrane
Ygg
MESOPROTEROZOIC NEOPROTEROZOIC
Horizontal Mylonitic Foliation
Float Location
Mylonitic meta-arkose (Zgchma) � Mylonitic meta-arkose interlayered with ZYlbg Layered biotite gneiss lesser amounts of mylonitic metagraywacke, mylonitic feldspathic metagray�wacke, and minor conglomeratic metagraywacke. Meta-arkose is light-gray,
MINERAL RESOURCES
pinkish-gray to tan; fine- to coarse-grained; equigranular to inequigranular;
ZgchuYgg
Mesoproterozoic metaigneous rocks foliated; lineated; mylonitic; consists of 50-70% quartz, 20-35% potassium
COMMODITY LETTER
Zswbw NB98
feldspar, 5-20% plagioclase, 2-10% biotite, 1-10% muscovite, accessory amounts
Thin section sample site.
SYMBOLS:
of garnet, and 1-2% opaques; locally contains feldspar porphyroblasts. Occurs as
Mi Mica
Ygg Granitic gneiss
a thin, continuous horizon within the more heterogeneous metasediments of the
Mine or quarry
Zgchma
Copperhill Formation.
Zgchu
Prospect
Ygg
Snowbird Group
TECTONICANDMETAMORPHICCONDITIONS
Zgchu
Wading Branch Formation
27'30"
27'30
Feldspathic metagraywacke (Zswbw) � Feldspathic metagraywacke inter-
Zgchu
bedded with granule conglomerate with minor schistose metagraywacke and
Zswbw
muscovite schist. Feldspathic metagraywacke is moderate-reddish-orange to pinkish-gray to tan; medium- to coarse-grained; well foliated; commonly mylonitic; poorly to moderately-well sorted; subrounded fragments; medium-to thick-bedded; consists of quartz, potassium feldspar, plagioclase, sericite and minor accessory minerals.
Zgchma
Zgchu
Zgchu Zgchu
Cartoogechaye Terrane
Layered biotite gneiss (Zylbg) � Medium-gray to dark-gray; inequigranular;
granoblastic to lepidoblastic; well foliated; migmatitic; highly layered; layer thick�ness ranges from millimeters to meters; consists of plagioclase, quartz, biotite,
N.C.
hornblende, garnet, potassium feldspar, epidote group minerals, muscovite,
ilmenite and minor accessory minerals. Interlayered with biotite gneiss, amphibo-Zgchu lite, and biotite schist.
Zgchu ZYlbg
Mesoproterozoic metaigneous rocks
Granitic gneiss (Ygg) � A heterogeneous metamorphosed igneous unit domi�
18
nated by granitic gneiss interlayered with biotite granitic gneiss, amphibolite and garnetiferous granofels gneiss. Granitic gneiss is pinkish-gray to brownish-gray to light-gray; medium- to coarse-grained; inequigranular; granoblastic to lepidoblas�tic; mylonitic to weakly foliated; consists of plagioclase, quartz, potassium feldspar, biotite, sericite, epidote group minerals, garnet, hornblende and acces�sory minerals. Amphibolite occurs as minor pods and lenses ranging in size from millimeters to meters.
Future
WHOLE ROCK ICP ANALYSIS1OF SELECTED SAMPLES
COORDINATES MAP
OXIDES IN PERCENT
ELEMENTS IN PPM3
SAMPLE2 (StatePlaneNAD83m) ROCKTYPE UNIT
LOI4
SUM5
SiO2 Al2O3 Fe2O3 MgO CaO Na2O K2O TiO2 P2O5 MnO Cr2O3
Ba Cu Zn Ni Co Sr Zr Ce YNb Sc
Mapping
5
198,473N;227,192E myloni.cmeta-arkose Zswbw
86.21
6.45
1.29
0.16
0.39
0.91
3.43
0.47
0.04
0.02
0.013
875
<5
13
<20
<20
116
258
34
14
<5
2
0.5
100.02
13A 200,880N;227,353E myloni.cgrani.cgneiss Ygg
66.86
15.51
4.28
0.96
0.53
0.76
7.94
0.97
0.16
0.04
0.011
1460
<5
61
<20
<20
146
580
100
32
21
10
1.7
100
14
200,769N;227,413E grani.cgneiss Ygg
71.99
14.15
2.34
0.65
1.56
3.03
5.02
0.28
0.1
0.05
<0.002
1161
<5
44
<20
<20
326
119
40
8
<5
4
0.7
100.02
17
197,883N;227,187E myloni.cmeta-arkose Zgchma
86.07
5.71
1.06
0.13
0.14
0.52
3.68
0.18
0.04
0.01
0.003
971
<5
<5
<20
<20
110
143
<30
3
<5
<1
2.3
100.03
99
201,955N;224,567E metagraywacke Zgchu
80.45
8.77
2.6
0.83
1.02
2.24
0.92
0.54
0.13
0.1
0.004
390
<5
20
<20
<20
165
433
54
21
19
4
2.2
99.99
Project
BC13 198,428N;230,227E metaconglomerate Zgchu
82.56
7.83
2.68
0.63
0.05
0.59
2.92
0.67
0.02
0.04
0.016
737
<5
22
<20
<20
85
518
32
15
20
4
1.9
100.02
25' 25'
BC82 197,453N;232,566E myloni.cmetagraywacke Zgchu
70.21
12.73
5.36
1.8
1.44
2.65
2.05
0.89
0.25
0.06
0.018
668
10
89
<20
<20
289
529
<30
23
7
9
2.3
99.98
NB45 198,951N;230,676E myloni.cmeta-arkose Zgchma
86.41
5.1
0.89
0.12
0.28
0.68
2.75
0.18
0.03
0.01
0.012
929
<5
7
<20
<20
111
125
<30
5
<5
<1
3.4
100.04
NB98 201,207N;232,930E myloni.cmeta-arkose Zswbw
82.19
8
1.51
0.16
0.08
0.99
4.53
0.41
0.03
0.02
0.018
1001
<5
<5
<20
<20
126
249
<30
6
16
2
1.9
100.03
NB99 201,301N;232,952E myloni.cgrani.cgneiss Ygg
66.81
16.65
2.8
0.55
2.7
3.53
5.44
0.37
0.06
0.06
0.008
1358
<5
30
<20
<20
431
215
217
7
<5
3
0.8
100.02
NB100 201,126N;232,207E myloni.cmeta-arkose Zswbw
89.28
5.15
1.19
0.07
0.02
0.1
3.2
0.26
0.03
0.02
0.003
772
<5
6
<20
<20
84
172
40
9
11
<1
0.6
100.03
NB102 198,720N;224,781E grani.cgneiss Ygg 63.47
16.25
5.66
1.66
4.38
3.34
2.74
0.79
0.26
0.08
0.003
1437
<5
76
<20
<20
625
281
77
19
5
11
1
99.99
RW6 197,315N;230,866E migma.te Zgchu 73.13
16.66
1.05
0.18
0.71
3.1
2.61
0.09
0.04
0.08
0.003
956
<5
27
32
<20
288
55
<30
16
13
3
2.2
100.02
1Whole Rock Inductively Coupled Plasma - Atomic Emission Spectrometer (ICP) analysis conducted by Acme Analytical Laboratories, LTD., 852 E. Hastings St., Vancouver, BC
Snowbird
2Sample numbers correspond to thin section and whole rock sample localities shown on geologic map
Great Smoky
Group
Formation
Metasediments
3PPM = parts per million
plunging plunging
4LOI = loss on ignition in percent
Cartoogechaye
arrow indicates
Terrane
thrust movement
direction
antiform synform
S
S
S
S
S
S
unconformity
5SUM = Sum total in percent
S
S
S
Granitic
Basement Gneisses
fault contact with teeth
on hanging wall block
SCHMIDT EQUAL AREA STEREONET DATA
TRAVERSEMAP
NN
Red lines show paths of field traverses.
620000 FEET
Poles to foliations. n = 398Poles to mylonitic foliations. n = 398
A'
35�22'30"35�22'30"
740000 FEET
N
N 83�15' 12'30" 10' 83�07'30"
Topographic base produced by the United States Geological Survey.
SCALE1:24000 ROADCLASSIFICATION
Altered by the North Carolina Geological Survey for use with this map.North American Datum of 1983 (NAD83).
InterstateRoute StateRoute
1 0.5 0 KILOMETERS 1 2
USRoute Local RoadWorld Geodetic System of 1984 (WGS84). 5�45�
1000 500 0 METERS 1000 2000
102M ILS
Projection: Universal Transverse Mercator, Zone 17S 10 000-foot ticks: North Carolina Coordinate System of 1983 1�16�
10.5 0 1 NORTH Ramp 4WD
CAR OLINA
23MILS
MILES
X.
Interstate Route
W/
1000 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 QUADRANGLELOCATION State RouteUS Route
UT MGR ID AND2011MAGNE T ICNO R T H FEET
Imagery. ..... .... ..... .... ..... .... ..... .... ..... .... ...NAIP,October20 09 Roads..... .... ..... .... .... ..... .... ..... .... ..... .�2 00 6-201 0 T ele Atlas DECLINAT IO N ATCE NT E RO FS HE ET U.S .NationalGrid CONTO URINT ER V AL4 0FEET Smokemont Bunches Bald Dellwood
270 90 Roads within US Forest S ervice Lands..... .... .... FST opo Data withlimited ForestS erviceupdates,2 00 9 Names.. ..... .... ..... .... ..... .... ..... .... ..... .... ..... .... ..... ..GNIS, 20 10 Hydrography..... .... ..... ...National H ydrography D ataset, 2 00 9 Contours.... ..... .... ..... .... ..... ..National ElevationD ataset,20 08 100,000-mSquareID 3 00 KV LV GridZoneDesignation 17S NOR T HAME R ICANV ER T ICA LD AT UMOF19 88 T hismapwas producedtoconformwithversion0 .5 .10ofthe draft US G S Standardsfor7. 5-M inute Q uadrangle Maps. Ametadatafileassociatedwiththisproduct isdraftversion0 .5.1 2 Whittier Greens Creek Sylva North Sylva South Hazelwood Tuckasegee S Y L V ANO R T H ,NC 20 1 1
Research supported by the U.S. Geological Survey, National Cooperative Geologic Mapping
Program, under USGS award number G11AC20296. The views and conclusions contained ADJOINING 7. 5' QUADR ANGLES
in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either express or implied, of the U.S. Government.
180
Trend and plunge of minor fold axes. n = 24
Poles to joints with unidirectional Rose diagram inset. n = 883
Trend and plunge of mineral lineations. n = 19
Jenkins Mountain
Firescald Ridge SW flank
Plott Balsam Ridge
Sylva North 7.5-minute, Open File Map 2012-07
CROSS SECTION A-A'
Big Witch Creek
A'
A
US Highway 19 Soco Creek
Shut-in Creek
5000 4000
5000
4000
Zgchma
Zswbw
FEET
FEET
3000
3000
Zgchu
Zgchu
Zswbw
Ygg
2000
Zgchu
2000
Ygg
Zswbw
Future Mapping Project
1000
1000 Sea Level Sea Level
Unit Contact
relative thrust motion
Fault Contact Form Lines
Bedrock Geologic Map of the Sylva North 7.5-minute Quadrangle, North Carolina
This Open-File Map is preliminary. It has been reviewed By internally for conformity with North Carolina Geological
Bart L. Cattanach, Jennifer B. Bauer, Stephen J. Fuemmeler, G. Nicholas Bozdog, and Richard M. Wooten
Survey mapping standards and with the North American Stratigraphic Code. Further revisions or corrections to Geology mapped from May 2012 to September 2012. Field assistance by Abigail Bullard. Map preparation, digital cartography this Open File map may occur. and editing by G. Nicholas Bozdog, Bart L. Cattanach and Richard M. Wooten.
2012
