U.S. DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY

GEOCHEMICAL DATA FOR JURASSIC DIABASE ASSOCIATED WITH EARLYMESOZOIC BASINS IN THE EASTERN UNITED STATES:

DURHAM AND SANFORD BASINS, NORTH CAROLINA

By

David Gottfried 1 , Albert J. Froelich 1 , and J. N. Grossman 1

Open-File Report 91-322-1

This report is preliminary and has not been reviewed for conformity with U.S. Geological editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

*Reston, Va.

1991

DURHAM AND SANFORD BASINS, NORTH CAROLINA

One hundred six (106) samples of diabase from eight (8) sheets and five (5) dikes were collected by Froelich and Gottfried and analyzed by the U.S. Geological Survey. All of the sheets and all but one of the dikes sampled in this study are representative of the olivine-normative magma type; the "JY" dike, however, is high Ti, quartz-normative.

Platinum (Pt) and palladium (Pd) abundances and ratios in the chilled margins of the olivine-normative sheets and dikes are subequal (at about 10 ppb each), and characteristic of this magma type elsewhere in the province. In the olivine-rich cumulate zones of the Creedmoor and Butner sheets, Pd and Pt abundances and ratios remain similar and fairly constant; in the Nello Teer-North Durham and Oak Grove sheets, however, Pt consistently exceeds Pd, commonly two- to four-fold, in places by an order of magnitude (see DDH-NTQ-90, Table 3D, for example). Although no thick or extensive zones of anomalous enrichment were discovered, some of the highest abundances of Pt (to 55 ppb in DDH-NTQ- 90, Table 3D, and 62 ppb in DDH-A-93, Table 2C) and local enrichment of Pd (96 ppb in DDH-A-93, Table 2C) are present in local zones cored in the thick sheets at Nello Teer, North Durham and Butner. Whereas the NTQ zone of enriched Pt is in cumulate rocks, the Butner anomaly zone is in a late-stage, coarsely crystalline pegmatoidal and granophyric segregation. As diabase outcrops are poor due to deep weathering, many prospective sheets and areas were not sampled during this reconnaissance study.

EXPLANATION FOR PLATE 1

Geochemical sample locality

Froelich and Gottfried, USGS, 1984; 1985; 1987

Corehole

DURHAM AND SANFORD BASINS, NORTH CAROLINA

SAMPLE NOT HHAGflA TYPE " DESCRIPTION OF SAMPLE

Wilton sheet - Table 1 F-84-WC-2 Olivine normative Cumulate

Hester sheet - Table 1FG-87-Db-24 Olivine normative (?) Diabase, fine FG-87-Db-24C " Diabase, altered

Creedmoor sheet - Table 1FG-87-Db-21 Olivine normative Diabase FG-87-Db-22 " Cumulate FG-87-Db-23 " Diabase, coarse

Butner sheet USGS core hole BUT-1

Table 2a, 2b, 2cDDH BUT-10' Olivine normative Diabase

30' " Cumulate 50' " " 80' " " 100' " " 140' - " " 170' " " 190' " "220' " "250 / « 270 / » 300' " "330' " "350' " "360' " Diabase370' Cumulate380' " "390' " "395' " "400' " "402' Diabase403' " "404' " Lower chill

DDH-BUT-404.5' " Lower chill

DDH-A-93' " Pegmatoid

North Durham sheet Nello Teer quarry (north face)

Table 3a NTQ-1 Olivine diabase Diabase-aphyric

O ii n

-3 " " .4 " "-5 " U. chill margin

SAMPLE NO

NTQ-8-9-10-11-12-13-14-14A

DDH NTQ-7'-10'-17'-30'-40'-50'-60'-70'-80'-90'-100'-110'-120'-130'-140'-150'-160'-170'-180'-190'-200'-210'-211'-212'

DBF-85-11-12A-12B-12C-12D

DBF-85-13A-13B

DURHAM AND SANFORD BASINS, NORTH CAROLINA

~***FlAGfiA TYPE

01ivine diabase

DESCRIPTION OF SAMPLE(west face) Table 3b

Cumulate-gabbro/troctoli te

Olivine normative

Pegmatite

North Durham sheet. USGS core hole DDH-NTQ-1

Table 3c, 3d, 3e Nello-Teer quarry

Diabase PegmatiteDiabase H

Cumulate

01ivine normative

01ivine normative H

Lower chilled margin

North Durham sheet Eno River Section Table 3f, 3g

Pegmatoid Cumulate

11 (5 ft above 12A) 11 (3 ft above 12B) 11 (9 ft above 12C)

Cumulate" (25 ft above 13A)

DURHAM AND SANFORD BASINS, NORTH CAROLINA

SAMPLE N0~

DBF-85-14-15-16-16A

DBF-85-17 -17A

BNC-85-1 BNC-85-1A

DBF-85-10B

DBF-85-18 DBF-85-19

TYPE

Olivine normative

01ivine normative

01ivine normative H

01ivine normative

01ivine normative

01ivine normative

01ivine normative

DDH-1-90.5' 1-97' 1-98' 1-99.5'

DDH-2-197' 2-201' 2-204' 2-205' 2-212' 2-218.3' 2-220' 2-223' 2-224'

NCMR3-257' 01ivine normative

DESCRIPTION OF SAMPLE

Cumulate HAphanitic chill

Diabase

Table 5 Diabase dike

North Durham sheet Braggtown quarry - Table 3h

Diabase

North Durham sheet - Table 3h Cumulate

Ellerbe sheet - Table 3h Diabase

Oak Grove sheet Oak Grove core hole DDH-1 - Table 4a

Cumulate

Oak Grove core hole DDH-2 - Table 4b Cumulate

Cumnock sheet, Sanford basin core hole NCMR3 - Table 5

Diabase, upper chilled margin (off 200 ft-thick sheet)

Sanford basin, core hole NCCM1 - Table 5 NCCM1-258' 01ivine normative Diabase dike, chilled margin

DURHAM AND SANFORD BASINS, NORTH CAROLINA

SAMPLE NOT flSGM/TlYPE DESCRIPTION OF SAMPLE

Durham basin - Table 5DBF-85-17 Olivine normative Diabase dike, float DBF-85-17A

Durham basin - Table 5 FG-87-DB-20 Olivine normative Diabase dike

JY dike, Durham basin - Table 5JY-1 High Ti, quartz normative Diabase dike JY-2

Table 1. Durham and Sanford-baaiaa^-MoFfch- Carolina. Wilton, Hester, and Creedmoor sheets.

Lat.Long.

Si02 (%)Ti02A1203Fe2O3FeOMnOMgOCaONaaOK2 OP205H20+H2O~

CO2SFCl£B (ppm)ScCrCoNiCuZnGaAsRbSrAgSbCsBaYLaC«NdSmEuTbYbLuZrHfNbTaThU

Pd (ppb)PtRhRuITAu

W-243048 F-84 WC2

36°15'N78°30'W

48.000.48

13.902.328.100.18

13.609.961.710.280.090.960.630.020.070.010.00

100.32

1.0036

37078

3208265

<0.708.0123

<0.0800.359328.04.49.96.31.680.560.402.200.31571.102.20

0.2300.49

<0.32

5.39.7

<6.0

W-243890 FG-87 DB-24

36°10'N78°39'W

51.300.74

15.502.877.200.196.77

11.602.290.470.150.510.290.010.040.010.01

99.94

6.6462304066936019.0

<2.706.0172

0.035. <0.180

<0.3015227.07.215.09.42.600.820.603.3

0.47731.702.50

0.1700.710.42

8.37.4

<5.0

W-243891 FG-87C DB-24C36°10'N78°39'W

59.000.74

24.603.223.100.071.491.561.823.580.110.750.10

<0.010.030.05

<0.00100.22

8.412.85116.428.038124321.80244246

0.110<0.30

13.670018.03666306.41.400.902.800.391775.220.02.3916.86.6

<0.50<1.00

<11.0

W-243887 FG-87 DB-21

36° 6'N78°41'W

50.800.65

15.803.007.000.187.69

12.002.160.400.120.590.250.040.080.01

<0.00100.77

5.84533043101856217.0

<1.705.0151

0.0290<0.160

0.6112624.06.014.07.82.290.750.563.0

0.44681.602.60

0.2100.73

<0.60II 4

110.60.6

<0.5<5.0

W-243888 FG-87 DB-22

36° 6'N78°41'W

49.000.41

17.002.236.200.15

10.1012.10

1.930.270.090.440.180.010.010.01

<0.00100.13

6.636

58048157504616.0

<1.708.0159

0.0170<0.200<0.30

8616.04.09.6

<5.01.500.540.401.90

0.27056

0.901.50

<0.2200.51

<0.50

5.25.2

<0.5<0.5<0.5<7.0

W-243889 FG-87 DB-23

36° 6'N78°42'W

50.600.58

16.202.446.800.187.63

12.402.160.370.110.650.220.020.020.02

<0.00100.39

6.6465004188705617.0

<1.8014.0184

0.0250<0.230<0.80

11920.05.012.0

<14.02.010.680.502.600.39641.502.00

0.1700.52

<0.60

1112

<0.7<0.5<0.5<5.0

Table 2a. Butner sheet, USGS X3ofeEoIe^Sut-l.

W-241802 DDH-BUT

10

Lat.Long.

Si02 (%)TiO2A1203FeaOsFeOMnOMgOCaONaaOK2OP206H20+H2O-

CO3SFClEB (ppm)ScCrCoNi

. CuZnAsRbSrSbC«BaYLaC*NdSmEuTbYbLuZrHfNbTaThU

Pd (ppb)PtRhRuITAu

36° 6'N78°46'W

49.500.39

20.202.045.000.128.02

12.502.240.320.070.410.270.060.030.010.00

101.172.0027.9370421787064

<0.7012.0164

< 0.130< 0.180

8824.03.99.05.01.420.540.311.70

0.250490.911.50

0.1300.46

<0.30

7.99.5

<1.002.40

<1.00<1.70

W-241803 DDH-BUT

3036° 6'N78°46'W

49.100.31

18.101.765.400.13

10.0013.10

1.830.200.050.360.260.040.020.01

<0.00100.67

3.035850472185572

<0.904.0142

<0.110<0.200

6912.02.707.04.21.100.44

0.2801.50

0.210410.73

<1.00<0.100

0.500.290

9.97.3

<1.002.20

<1.00<7.0

W-241804 W-241805 DDH-BUT DDH-BUT

50 8036° 6'N78°46'W

49.000.41

15.501.956.520.15

11.9012.40

1.670.250.070.550.280.050.020.01

<0.00100.73

3.040940572675670

<2.704.0127

<0.130<0.30

7124.03.79.24.61.470.490.371.79

-.- 0.260531.001.50

0.1400.42

<0.30

7.96.6

<1.002.40

<1.005.4

36° 6'N78°46'W

48.500.32

16.901.596.370.14

11.4012.301.750.200.060.500.240.040.020.010.01

100.342.0034780572675474

<0.8015.0141

<0.090<0.200

6113.02.807.54.01.160.440.2801.40

0.190400.771.20

0.1700.40

<0.30

6.58.2

<1.002.00

<1.00<2.40

W-241806 DDH-BUT

11036° 6'N78°46'W

48.700.35

15.902.026.750.15

11.9012.30

1.750.210.060.520.290.040.030.01

<0.00~100.98

3.039870592715858

<0.906.0128

< 0.1000.2206514.03.38.25.11.310.460.311.70

0.230440.851.40

<0.1400.34

<0.40

5.45.0

<1.001.00

<1.00<4.0

W-241807 DDH-BUT

14036° 6'N78°46'W

49.000.39

15.802.296.200.15

11.0012.30

1.750.240.060.540.460.08

<0.010.01

<0.00100.272.004186053

2335972

<0.90<2.00

120<0.100<0.200

7314.03.68.14.01.410.500.321.80

0.240401.201.30

0.1400.44

<0.30

7.56.7

<1.002.00

<1.0010.0

W-241808 DDH-BUT

17036° 6'N78°46'W

49.000.43

17.202.176.170.15

10.1011.80

1.930.300.070.750.360.070.100.01

<0.00100.602.0034

530522226980

<1.1011.0136

<0.1300.5490

25.04.29.25.31.560.560.411.90

0.280591.101.70

<0.2600.48

<0.290

7.410.0

<1.002.20

<1.00<4.0

W-241809 DDH-BUT

19036° 6'N78°46'W

49.100.44

16.802.825.990.159.95

12.001.980.290.080.640.500.08

<0.010.01

<0.00100.83

1.0038

63053

2217384

<1.608.0140

<0.110<0.31

8522.04.19.86.41.600.540.362.10

0.290521.001.600.310.48

<0.40

8.16.9

<1.002.00

<1.00<2.60

Table 2b. Butner sheet, USGS eofeiC5irBi££l. "*

Lat.Long.

Si02 (%)TiO2A12O3Fe2O3FeOMnOMgOCaONaaOK2OP206H20+H20~

CO2SFCl£B (ppm)ScCrCoNiCuZnAsRbSrSbCsBaYLaCeNdSmEuTbYbLaZrHfNbTaThUPd (ppb)PtRhRuIrAu

W-241810 DDH-BUT

22036° 6'N78°46'W

49.500.47

15.902.416.660.16

10.7012.201.870.280.080.470.250.07

<0.010.01

<0.00101.03

2.00427605422473100

<1.208.0130

<0.110<0.30

8619.04.210.05.31.650.530.432.10

0.290521.101.50

0.2200.46

<0.328.39.2

<1.002.00

<1.00<3.0

W-241811 DDH-BUT

25036° 6'N78°46'W

49.600.51

16.502.666.590.169.98

12.002.080.320.080.370.340.060.040.01

<0.00101.29

7.440570512088088

<1.308.0

* 143<0.120<0.31

89-19.04.711.06.61.770.580.412.300.31551.202.00

0.1600.52

<0.309.18.2

<1.00<1.00<1.00<7.0

W-241812 DDH-BUT

27036° 6'N78°46'W

49.400.49

16.402.596.680.169.83

11.902.020.330.080.470.310.06

<0.010.01

<0.00100.73

4.039540522078195

<1.304.0131

<0.110<0.30

9023.04.711.04.61.780.600.412.200.34571.101.800.460.59

<0.30

12.08.4

<1.002.80

<1.00<1.80

W-241813 DDH-BUT

30036° 6'N78°46'W

49.600.54

16.602.496.910.179.41

11.702.120.340.090.500.270.060.050.01

<0.00100.85

4.039

440521958698

<1.505.0144

<0.1400.3210022.05.111.07.31.880.600.462.400.33601.302.10

0.1800.61

<0.309.69.1

<1.002.00

<1.00<2.10

W-241814 DDH-BUT

33036° 6'N78°46'W

49.800.53

16.603.196.930.178.99

11.902.170.330.090.400.300.050.050.010.00

101.528.2433404917890100

<1.706.0142

<0.1300.8011024.05.713.07.32.200.690.492.800.38681.502.500.2000.73

<0.3010.010.0

<1.002.00

<1.00<7.0

W-241815 DDH-BUT

35036° 6'N78°46'W

49.900.57

16.402.757.160.179.25

11.602.140.350.100.490.250.060.050.01

<0.00101.26

5.2404005118893100

<1.7011.0151

<0.2100.4510827.05.212.06.92.000.660.512.500.37631.302.50

<0.2800.58

<0.30

11.013.0

<1.002.00

<1.00<8.0

W-241816 DDH-BUT

36036° 6'N78°46'W

50.500.58

17.402.716.050.167.01

12.602.200.370.100.550.340.070.050.01

<0.00100.70

6.441340411069296

<1.9011.0184

<0.1300.3410929.05.412.07.62.070.650.472.600.38721.402.300.2300.84

<0.3010.09.9

<1.002.20

<1.00<2.30

W-241817 DDH-BUT

37036° 6'N78°46'W

49.900.56

16.202.497.360.189.32

11.502.140.340.100.420.370.050.050.01

<0.00100.99

7.03936011040820693

<1.80<2.00

145<0.130

0.4510619.05.112.07.11.960.640.392.400.35561.402.20

0.2000.69

<0.30

11.011.0

<1.002.00

<1.00<2.90

Table 2c. Butner sheet, USGS and DDH-A.

Lat.Long.

Si02 (%)TiO2A1203Fe2O3FeOMnOMgOCaONaaOK20P206H20+H20~

CO2SFClEB (ppm)ScCrCoNiCuZnAsRbSrSbCsBaYLaCeNdSmEuTbYbLaZrHfNbTaThUPd (ppb)PtRhRuITAu

W-241818 DDH-BUT

38036° 6'N78°46'W

49.800.56

16.002.527.270.179.47

11.502.050.330.100.570.230.040.050.01

<0.00100.66

13.74036052

2019893

<1.903.0155

<0.150<0.30

11321.05.212.06.42.000.640.462.500.36571.302.00

0.1900.69

<0.30

10.012.0

<1.002.00

<1.00<3.0

W-241819 DDH-BUT

390 _

36° 6'N78°46'W

49.800.55

15.802.656.890.179.37

11.401.950.360.090.790.420.080.030.01

<0.00100.37

4.840350522069593

<2.009.0172

<0.1400.9112219.05.413.07.02.000.640.422.500.35661.302.20

0.1400.86

<0.40

11.011.0

<1.002.00

<1.00<1.80

-

W-241820 DDH-BUT

39536° 6'N78°46'W

49.500.57

15.902.647.270.179.44

11.402.050.330.100.870.190.040.050.01

<0.00100.54

6.44036053

2059478

<0.5011.0146

<0.0600.8411529.05.312.06.52.060.650.462.610.35691.502.20

0.2100.63

<0.270

11.08.5

<1.001.00

<1.004.0

W-241821 DDH-BUT

40036° 6'N78°46'W

49.700.56

16.002.977.270.179.17

11.402.130.330.100.900.290.030.050.01

<0.00101.09

12.842360521979778

<0.5015.0151

<0.1001.0010928.05.512.07.02.080.650.552.620.38691.602.50

0.1800.62

<0.280

11.011.0

<1.002.00

<1.004.3

W-241822 DDH-BUT

40236° 6'N78°46'W

50.100.59

16.102.697.110.188.48

11.602.220.350.100.820.320.030.050.010.00

100.762.6042

4604915910077

<0.706.0153

<0.0800.3510826.05.212.06.71.940.630.462.500.36651.402.50

0.2500.61

<0.280

11.01LO

<1.002.40

<1.00<2.00

W-241823 DDH-BUT

40336° 6'N78°46'W

50.200.59

15.903.276.820.178.47

11.302.080.410.101.140.400.060.030.02

<0.00100.95

6.4433505016910082

<0.6013.0169

<0.0700.8813620.05.713.08.02.150.700.482.600.39651.602.50

0.1700.830.46

12.013.0

<1.001.00

<1.006.5

W-241824 DDH-BUT

40436° 6'N78°46'W

50.500.62

16.203.816.660.187.76

11.802.250.340.110.830.350.040.050.020.00

101.526.0463504714010487

<0.808.0136

<0.0800.6514027.06.013.37.42.290.740.602.830.41681.702.800.2000.78

<0.30

11.011.0

<1.00<1.00<1.00<1.60

W-241825 DDH-BUT

404.536° 6'N78°46'W

50.400.62

16.103.416.760.187.72

11.802.210.360.110.890.250.030.050.020.00

100.916.0453504814110686

<0.607.0149

<0.0700.6911427.06.014.07.12.240.730.512.750.40691.502.70

0.2000.75

<0.290

11.011.0

<1.002.00

<1.009.1

. W-241801 DDH-A

9336° 6'N78°46'W

52.701.05

14.204.717.390.235.909.922.760.630.180.500.520.030.060.020.01

100.832.004919.04154166120

<1.1014.0151

<0.110<0.230

183449.521.012.03.41.080.824.1

0.601052.604.7

0.331.100.35

96624.2

<1.00<1.00<7.0

Table 3a. North Durham sheet, NeffiTTeer" quarry, north face.

Lat.Long.

SiO2 (%)TiO2A12O3Fe2O3FeOMnOMgOCaONajOK2OP206H20+H20-

C02SFClE

B (ppm)ScCrCoNiCuZnRbSrSbCaBaYLaCeNdSmEuTbYbLuZrHfNbTaThU

Pd (ppb)PtRh

W-228164 NTQ-136° 4'N78°49'W

47.800.71

16.703.907.200.187.10

11.501.750.260.121.600.900.020.070.000.00

99.82

4.045273531601398111.01700.381.20122335.712.0

<17.02.200.740.593.1

0.47711.502.00

0.1200.35

<1.00

4.411.0

<0.50

W-228165 NTQ-236° 4'N78°49'W

48.800.72

16.602.608.500.188.20

11.402.020.290.120.620.360.020.08

<0.00<0.00100.52

2.0045

26251140142785.0179

<0.600.33"16929.05.7"

11.0<6.0

2.240.750.603.3

0.45661.401.80

0.1100.39

<0.40

4.811.0

<0.50

W-228166 NTQ-336° 4'N78°49'W

48.000.55

17.602.307.600.169.60

11.501.750.240.100.550.410.010.060.38

<0.00100.82

2.0038

35054

230135716.0200

<0.700.4512625.04.29.66.41.730.630.432.400.37531.201.40

0.0960.47

<0.40

6.012.0

<0.50

W-228167 NTQ-4

36° 4'N78°49'W

48.700.71

16.703.207.900.188.10

11.401.890.290.120.890.510.020.080.380.00

101.07

2.0044267511501548410.0147

<0.700.5514629.05.713.08.32.250.770.563.1

0.49681.602.10

0.1200.35

<0.40

4.611.0

<0.50

W-228168 NTQ-536° 4'N78°49'W

48.200.72

16.503.108.000.187.90

11.402.020.240.121.000.470.030.06

<0.000.00

99.95

2.004526550140163795.0157

<0.700.51150335.812.07.02.270.780.603.10.47671.501.70

0.1200.46

<1.00

6.211.0

<0.50

10

Table 3b. North Durham sheet, NeHo'Tier' quarry, west face.

Lat.Long.

SiO2 (%)TiO2A1203Fe2O3FeOMnOMgOCaONaaOK2OP206H30+H2O~

CO2SFClEB (ppm)ScCrCoNiCuZnAsRbSrSbCsBaYLaCeNdSmEuTbYbLuZrHfNbTaThUPd (ppb)PtRhAu

W-228172 NTQ-936° 4'N78°49'W

45.600.31

19.101.607.400.14

13.0011.20

1.480.030.060.810.190.010.040.00

<0.00100.98

2.0023.4251693908761 3.0153

<0.500.220

8414.02.706.03.41.000.430.2901.30

0.210340.730.700.0600.30

<0.32

5.812.0

<0.50

W-228173 NTQ-1036° 4'N78°49'W

46.500.53

18.702.007.200.14

10.6010.401.890.160.101.000.480.030.060.00

<0.0099.79

2.0022.6227613207495 8.0167

<0.500.27012824.04.810.06.41.770.620.492.300.34571.301.50

0.1300.37

<0.80

7.829.0

<0.50

W-228174 NTQ-1136° 4'N78°49'W

46.400.40

18.302.206.700.14

10.7011.20

1.750.160.071.000.390.060.00

<0.00<0.0099.48

2.0029.537061

3209064 5.0156

<0.60<0.30

12320.03.37.15.61.300.520.361.90

0.280470.941.00

0.072<0.50<0.30

6.615.0

<0.50

W-228175 NTQ-1236° 4'N78°49'W

46.500.49

17.901.907.800.15

11.2010.30

1.750.180.090.960.540.010.030.00

<0.0099.81

2.0025.1211633409571 5.0153

<0.500.23011121.04.28.75.01.570.560.372.200.34491.101.30

0.0970.280

<0.50

6.613.0

<0.50

W-228176 NTQ-1336° 4'N78°49'W

46.600.52

18.602.107.000.149.80

11.001.750.140.100.830.470.010.020.00

<0.0099.09

3.028.3164562708559 5.0162

<0.50<0.40

13824.04.79.6

<5.01.740.630.432.400.36571.301.50

0.1100.36

<0.50

4.89.0

<0.50 ,

W-243055 NTQ-1436° 4'N78°52'W

48.001.82

13.206.468.600.237.81

11.102.480.680.181.000.820.060.190.020.00

102.65 65816212010678

<1.306.0143

<0.130<0.30

1974210.021.312.04.11.311.205.4

0.79902.806.80.460.85

<0.50

1.505.2

<1.60

W-243056 NTQ-14A

36° 4'N78°52'W

52.601.80

12.105.446.400.242.918.913.854.210.631.000.720.160.020.050.01

101.06

3.0394.127.810.04999

<1.203545

<0.120<0.270

28416037764112.03.43.115.82.253409.517.01.002.800.84

<0.50<1.00

<10.0

11

Table 3c. North Durham sheetrNeilo-Tetef^quarry, USGS Corehole NTQ-1.

W-243049 DDH-NTQ

7

Lat.Long.

Si02 (%)TiO2A13 O3Fe2O3FeOMnOMgOCaONaaOK20P206H20+H30-

C02SFClE

B (ppm)ScCrCoNiCuZnAsRbSrSbCsBaYLaCeNdSmEuTbYbLuZrHfNbTaThUPd (ppb)PtAu

36° 4'N78°53'W

46.300.46

17.602.408.300.16

11.7010.501.940.220.080.940.520.030.100.010.00

101.2631

25.823672

3508078

<0.9014.0139

<0.0800.25010322.04.08.36.41.510.600.412.100.31521.001.90

0.2700.290

<0.305.19.8

<3.0

W-243027 DDH-NTQ

1036° 4'N

78°53'W

53.702.51

12.504.635.700.183.808.392.913.490.690.760.960.150.010,050.02

100.46

25.54228.031345172

<1.2040110

<0.110<0.30

54015737774312.43.13.015.62.183409.617.01.203.0

0.73

<0.50<0.100<8.0

W-243050 DDH-NTQ

1736° 4'N78°53'W

46.600.44

17.902.226.700.14

11.3011.901.740.180.071.100.530.060.030.010.00

100.92 32530663109862

<1.006.0136

<0.080<0.250

8522.03.28.35.31.300.520.371.80

0.26044

0.811.50

0.2500.260

<0.30

5.39.34.9

W-243051 DDH-NTQ

3036° 4'N78°53'W

46.300.44

17.202.437.400.15

12.0011.401.770.180.070.910.560.060.050.01

<0.00100.93

4.334530693309465

<1.10<2.00

137<0.170<0.250

10219.03.48.24.81.330.520.381.90

0.26045

0.871.40

0.200<0.40<0.30

4.313.08.6

W-243028 DDH-NTQ

4036° 4'N78°53'W

46.100.41

16.401.828.800.16

13.3010.901.660.180.070.261.200.060.030.010.00

101.357.0336307739010058

<1.604.0133

<0.120<0.30

8116.03.27.53.31.220.510.471.70

0.25040

0.781.40

<0.260<0.30<0.40

5.016.0

<2.60

W-243029 W-243030 DDH-NTQ DDH-NTQ

50 6036° 4'N78°53'W

46.300.46

17.201.858.200.15

12.0011.00

1.850.200.070.800.920.080.040.010.01

101.14 -12.13149073

3409065

<1.105.0138

0.160<0.31

9521.03.48.24.81.350.540.341.90

0.28047

0.901.70

0.2500.35

<0.40

4.814.08.3

36° 4'N78°53'W

46.500.45

17.201.369.000.16

12.2011.10

1.790.190.070.740.630.050.030.010.01

101.49

5.13350072

35010258

<1.204.0145

<0.120<0.32

9926.03.48.14.41.330.510.401.90

0.260431.001.40

0.1900.270

<0.50

5.320.0

<4.0

W-243031 DDH-NTQ

7036° 4'N78°53'W

46.600.46

17.700.709.300.15

11.4011.201.930.200.070.460.680.050.070.010.00

100.98

1.003242070

3109357

<1.207.0143

<0.120<0.31

10922.03.68.85.01.400.550.412.000.290

490.931.60

0.280<0.40<0.50

6.020.05.0

12

Table 3d. North Durham sheet, HelbJTse^quany, USGS Corehole NTQ-1.

Lat.Long.

Si02 (%)TiO2A12O3Fe2O|Fe2O3FeOMnOMgOCaONaaOK2OP305H2O+H2O-

CO2SFCiLOI900CSB (ppm)ScCrCoNiCuZuAsRbSrSbCsBaYLaC«NdSraEuTbYbLuZrHfNbTaThU

Pd (ppb)PtAu

W-243032 DDH-NTQ

8036° 4'N78°53'W

46.600.46

17.10 1.818.600.16

11.9011.20

1.910.200.080.330.740.070.070.010.01

101.254.035

50075

3309755

<1.303.0141

<0.400.349921.03.68.44.91.420.570.422.080.289461.001.700.310.35

<0.50

7.724.06.4

W-243033 DDH-NTQ

9036° 4'N78°53'W

46.900.52

17.60 1.858.100.15

10.5011.60

1.970.200.080.960.720.060.070.010.00

101.2913.536

420682809863

<1.407.0161

<0.130<0:30

11825.04.09.15.51.570.610.512.300.32481.102.000.320.35

<0.50

3.755

<5.0

W-243034 W-243035 DDH-NTQ DDH-NTQ

100 11036° 4'N78°53'W

47.100.55

17.70 1.438.800.16

10.6011.302.010.220.090.950.460.060.060.010.00

101.50

1.0033

3506628010156

<1.304.0151

<0.120<0.70

12324.04.18.84.91.630.630.452.300.3252

1.101.800.300.41

<0.80

5.013.0

<7.0

36° 4'N78°53'W

46.900.55

17.1011.48 0.16

11.3011.00

1.940.220.09 0.050.100.010.000.53

101.4412.4343907630010976

<1.506.0142

<0.130<0.30

9826.04.09.35.21.630.630.502.200.33511.20

<10.00.410.33

<0.50

4.18.7

<5.0

W-243036 DDH-NTQ

12036° 4'N78°53'W

47.300.58

17.60 1.149.000.16

10.5011.202.040.250.090.750.590.060.100.010.01

101.373633

3606627010459

<1.406.0147

<0.140<0.31

12127.04.710.05.91.750.650.452.400.35551.301.90

0.2700.42

<0.50

4:513.0

<8.0

W-243037 DDH-NTQ

13036° 4'N78°53'W

47.200.54

17.20 2.377.900.16

10.6011.60

1.980.240.070.560.720.060.100.010.00_

101.3215.837

42067

27010567

<1.506.0148

<0.1300.3711221.04.18.75.91.640.640.442.400.34511.101.80

0.2400.37

<0.50

3.59.3

<2.30

W-243038 DDH-NTQ

14036° 4'N78°53'W

47.200.62

17.3011.58 0.17

10.2011.102.060.280.09 0.120.080.010.010.51

101.3312.1343207926011468

<1.504.0168

0.240<0.30

13226.04.911.05.71.850.670.502.600.37581.302.300.310.40

<0.50

3.68.8

<8.0

W-243039 DDH-NTQ

15036° 4'N78°53'W

47.400.61

17.00 2.877.800.17

10.3011.302.060.270.081.100.560.070.080.010.00

101.6922.037

3906525011462

<1.607.0170

<0.1600.50140314.811.05.81.860.690.582.600.37601.202.00

0.2900.34

<0.50

3.810.0

<6.0

13

Table 3e. North Durham sheetrNeWTeWquariy, USGS Corehole NTQ-1.

W-243040 DDH-NTQ

160

Lat.Long.

Si02 (%)TiO2A1203Fe2OIFe2O3FeOMnOMgOCaONaaOK2OP20SH2O+H2O~

CO2SFClLOI900CS

B (ppm)ScCrCoNiCuZnAsRbSrSbCsBaYLaCeNdSmEuTbYbLuZrHfNbTaThUPd (ppb)PtAu

36° 4'N78°53'W

47.300.59

16.7011.51 0.17

10.4011.402.080.250.08 0.110.090.010.000.52

101.22

6.539

4306726012062

<0.70<2.00

159<0.150

0.5513423.04.510.06.51.840.700.522.600.35521.20

<10.00.1800.34

<0.31

3.511.06.1

W-243041 DDH-NTQ

17036° 4'N78°53'W

47.000.64

16.90 3.237.900.17

10.1011.002.100.260.090.920.730.060.040.010.00

101.16

11.239

4307126010867

<0.509.0152

<0.1100.7514225.05.011.06.21.900.730.572.810.39561.302.400.300.41

<0.40

2.805.928.0

W-243042 DDH-NTQ

18036° 4'N78°53'W

47.400.61

16.40 2.458.600.17

10.9011.102.060.280.080.450.720.050.090.010.00

101.38

3639

52071

28010963

<0.604.0142

0.1300.4813329.04.811.06.01.870.710.512.660.37541.302.000.310.35

<0.30

2.908.07.2

W-243043 DDH-NTQ

19036° 4'N78°53'W

47.000.59

16.00 2.458.600.17

11.9010.802.040.260.081.300.380.050.090.010.00

101.72

22.338

6507534011975

<0.602.00148

0.0850.9814326.04.611.06.81.800.650.482.560.36561.302.00

0.2700.250

<0,40

3.99.4

<2.30

W-243044 DDH-NTQ

20036° 4'N78°53'W

47.200.61

16.20 2.898.400.17

10.7011.202.090.240.101.200.370.050.080.020.00

101.52

21.4414207027012874

<0.60<2.00

146<0.140

0.9113621.04.811.06.31.920.740.552.70.0.37541.302.100.2600.280

<0.30*3.1

9.1<6.0

W-243045 DDH-NTQ

21036° 4'N78°53'W

47.500.66

16.50 3.338.000.189.52

11.202.140.240.101.700.630.040.120.020.00

101.89

25.442

29968

21013588

<0.702.00143

<0.502.1012723.05.111.06.82.030.740.652.920.41551.302.400.2600.35

<0.30

3.47.15.1

W-243046 DDH-NTQ

21136° 4'N78°53'W

47.800.70

16.40 3.718.000.189.17

11.402.240.260.110.880.550.020.150.010.00

101.58

28.2452906119012467

<0.706.0141

<0.1901.4011724.05.512.07.32.200.780.613.1

0.42591.402.40

0.1800.42

<0.30

3.211.0

<8.0

W-243047 DDH-NTQ

21236° 4'N78°53'W

48.000.74

16.40 3.318.200.198.32

11.502.250.280.111.600.680.020.080.020.00

101.71

29.346

27861160144813.56.0150

0.2501.1014027.05.913.08.4

2.230.820.623.1

0.44601.402.40

0.2700.46

<0.30

2.609.88.6

14

Table 3f. North DurEam sheet,"Eno'Kiver'aectiofi.

Lat.Long.Si02 (%)Ti02A1203Fe203FeOMnOMgOCaONaaOK20P206H20+H2CTCO2SE

B (ppm)ScCrCoNiCuZnRbSrSbCsBaYLaCeNdSmEuTbYbLuZrHfNbTaThUPd (ppb)PtRh

W-232407 DBF-85-11

36° 4'N78°53'W

50.100.96

17.103.007.100.165.40

11.102.830.510.150.860.440.010.20

99.92

2.00491154062120909.01850.56

<1.00193327.115.08.1

2.681.010.653.70.57771.702.10

0.2300.41

<0.2901.101.10

<0.50

W-232408 DBF85-12A

36° 4'N78°53'W

47.700.62

18.102.007.500.159.90

11.302.020.280.100.450.370.010.12

100.62

2.00363405823098782.00155

<0.500.5012424.05.011.0

. <10.01.850.700.532.500.40551.20

<2.000.130

<0.50<0.240

3.69.4

<0.50

W-232409 DBF85-12B

36° 4'N78°53'W

47.300.55

17.802.507.200.15

10.3010.80

1.890.190.091.200.430.010.07

100.48

2.0035

35060260100769.0160

<0.600.6313426.04.59.85.11.690.650.472.400.38541.20

<2.000.0980.48

<0.310.908.4

<0.50

W-232410 DBF85-12C

36° 4'N78°53'W

46.900.55

17.801.807.600.159.90

11.002.020.240.091.100.290.010.09

99.54

2.0036

35059

240100734.0148

<0.50<0.80

11523.04.88.8

<6.01.740.660.472.300.38501.10

<2.000.120

<0.50<0.250

1.409.6

<0.50

W-232411 DBF85-12D

36° 4'N78°53'W

46.900.60

17.402.207.800.169.80

11.001.900.210.100.840.360.010.13

99.41

2.003731060230110786.0151

<0.500.5713326.0

<509.26.11.800.670.512.800.40561.20

<2.000.1200.39

<0.2503.913.0

<0.50

15

Table 3g. North Durham sheet7ESd~Ri?SfrSectidii.

Lat.Long.

Si02 (%)Ti02A12O3Fe2O3FeOMnOMgOCaONaaOK20P205H20+H2CrCO2SEB (ppm)ScCrCoNiCuZnRbSrSbCsBaYLaC«NdSmEuTbYbLaZrHfNbTaThU

Pd (ppb)PtRh

W-232412 DBF-85

13A36° 4'N78°53'W

47.600.62

17.502.307.700.169.50

11.202.020.260.090.950.250.020.15

100.323.04033057

210110897.0156

<0.50<0.70

12327.05.110.05.91.840.700.512.600.40591.30

<2.000.1000.38

<0.290

3.110.0

<0.50

W-232413 DBF-85

13B36° 4'N78°53'W

47.800.66

17.402.008.100.169.10

11.202.020.430.100.820.380.010.11

100.29<2.00

4136055

2001201107.0183

<0.600.4413729.05.112.06.62.030.740.552.900.45651.50

<2.000.1300.41

<0.30

3.216.0

<0.50

W-232414 DBF-85

1436° 3'N78°52'W

47.000.46

19.301.107.600.149.90

11.202.160.190.070.770.180.010.13

100.21<2.00

28.72345724094675.0152

<0.400.5310220.04.08.0

<4.01.400.580.372.10

0.290440.90

<2.000.1000.63

<0.270

3.911.0

<0.50

W-232415 DBF-85

1536° 3'N78°52'W

45.500.31

19.800.907.600.14

12.8010.80

1.620.130.190.580.120.020.13

100.64<2.00

22.3274674007157

<2.00139

<0.50<0.60

7912.02.304.6

<9.00.910.41

0.2201.20

0.20027.00.54

<2.000.068

<0.600.270

8.721.0

<0.50

W-232416 DBF-85

1636° 3'N78°52'W

47.700.73

16.402.108.600.187.90

11.202.160.270.111.100.190.010.17

98.82<2.00

462685212013O964.0140

<0.700.5015029.05.812.08.5

2.300.820.583.2

0.48661.40

<2.000.13O

<0.90<0.40

4.110.0

<0.50

W-232417 DBF-85

16A36° 3'N78°52'W

48.300.74

16.502.208.600.188.30

11.202.160.300.100.830.270.010.24

99.93<2.00

4728453130130913.0161

<0.700.3816126.05.512.08.3

2.310.810.553.2

0.49651.50

<2.000.1500.46

<0.60

4.28.0

<0.50

16

Table 3h. North Durham sheet, Braggtagco-quarry and Ellerbe sheet.

Lat.Long.

Si02 (%)TiO2A12O3Fe205Fe2O3FeOMnOMgOCaONasOK2 OP205H2O+H2O-

CO2SE

B (ppm)ScOrCoNiCuZnAsRb" Sr

SbCsBaYLaCeNdSmEuTbYbLuZrHfNbTaThUPd (ppb)PtRh

W-239866 BNC85-136° 1'N78°54'W

12.36

10.491.58 0.03

42

1280745008888

<2.203.079

<0.501.803220.02.706.14.11.100.380.332.200.3436

0.911.30

0.160<0.30<0.40

10.014.0

<0.50

W-239867 BNC85-1A

36° 1»N78°54'W

12.30 9.651.56 0.05

39

1810805608384

<2.204.096

<0.501.305721.02.906.5 -3.41.100.390.312.120.3134

0.671.40

0.2000.31

<0.40

19.019.01.70

W-232405 DBF85-10B

36° 3'N78°54'W

46.700.47

18.50 1.607.600.15

11.0010.901.890.240.080.620.200.010.10

100.06

2.0029.7370643008375 5.0146

<0.50<0.90

10019.03.88.15.91.450.570.411.90

0.290431.00

<2.000.0950.30

0.100

5.09.8

<0.50

W-232420 DBF-85-18

36° 2'N78°49'W

48.500.47

16.20 2.707.600.188.80

11.902.020.160.090.900.200.010.13

99.86

2.00463605214010097 5.01180.390.817225.03.58.2

<401.460.500.382.700.3846

0.89<2.000.100

<0.80<0.40

8.917.0

<0.50

W-232421 DBF-85-19

36* 2'N78°46'W

49.200.52

15.40 3.007.400.198.30

11.702.020.270.110.950.350.010.11

99.53

2.00493105011010090. 7.0138

<0.70<0.80

10927.05.111.05.41.750.580.452.800.44581.20

<2.000.1300.760.33

9.610.0

<0.50

17

Table 4a. Oak Grove sheet, Corehole DDH-1.

Lat.Long.

Fe2O| (%)CaONa2OS

Sc (ppm)CrCoNiCuZnAaRbSrSbCsBaYLaCeNdSmEuTbYbLuZr

.HfNbTaThU

Pd (ppb)PtRh

W-239868 DDH-1-90.5

35°58'N78°48'W

12.119.931.670.05

391320

826008382

<2.306.085

<0.500.515723.03.27.04.51.200.390.332.160.33430.812.300.790.37

<0.40

11.016.0

<0.50

W-239860 W-239869 DDH-1-97 DDH-1-98

35°38'N 35°58'N78°48'W 78°48'W

11.81 11.61 1.87 0.03

461100 73060 64

310 22095 10080 89 <2.50 3.0 95 <0.50 0.87 51 22.0 3.4 7.3 4.5 1.33 0.44 0.36 2.53 0.38 42 <1.10 2.20 0.89 0.250 <0.40

11.0 14.0 <0.50

W-239870 DDK- 1-99.5

35°58'N78°48'W

12.0010.35

1.630.05

401310955308879

<2.50<2.00

86<0.50

0.735418.03.06.83.81.100.390.322.110.32330.662.401.30

<0.40<0.40

17.014.00.80

18

Table 4b. Oak Grove sheet, Corehole DDH-2.

Lat.Long.

Fe2O$ (%}CaONa^OS

Sc (ppm)CrCoNiCuZnAsRbSrSbCsBaYLaCeNdSmEuTbYbLaZrHfNbTaThU

Pd (ppb)PtRh

W-239871 DDH-2

19735°58'N78°49'W

12.598.531.460.05

344300

937706982

<2.505.086

<0.501.904713.03.79.74.81.170.360.311.80

0.28034

0.791.900.560.36

<0.50

10.012.0

<0.50

W-239872 DDH-2

20135°58'N78°49'W

11.3012.03

1.940.06

45820632409383

<2.804.0109

<0.600.486820.03.67.44.31.300.430.372.370.36440.852.200.850.35

<0.40

8.714.02.60

W-239873 DDH-2

20435°58'N78°49'W

12.279.371.510.03

381540957108086

<2.709.174

<0.501.205614.03.38.04.01.100.380.322.060.3137

0.711.800.720.290

<0.50

14.020.0

<0.50

W-239874 W-239863 DDH-2 DDH-2

205 212

35°58'N 35°58'N78°49'W 78°49'W

11.96 8.67 1.35 0.02

37 1450 70086 53

720 27085 8280 59

<2.90 5.0 89

<0.50 1.50 47 22.0 3.0 6.1 4.0 1.10 0.37 0.30 1.96 0.30 39

0.62 1.70 0.41 0.30

<0.40

14.0 22.0

<0.50

W-239876 DDH-2 218.3

35°58'N78°49'W

12.089.371.46

<0.01

38162081

6508787

<3.0<2.00

101<0.50 -

1.104116.02.505.84.11.030.360.321.90

0.29934

0.651.80

0.280<0.40<0.50

12.015.0

<0.50

W-239877 W-239864 DDH-2 DDH-2

220 223

35°58'N 35°58'N78°49'W 78°49'W

10.34 11.75

1.36 <0.01

36 1010 94056 63300 31072 9373 692.30 4.0 103

<0.40 0.59 28.0 16.0 2.40 6.3 3.4 1.04 0.36 0.31 1.93 0.30 36

0.68 1.30

0.160 0.290

<0.40

8.8 16.0 1.20

W-239878 DDH-2

22435°58'N78°49'W

11.5711.05

1.85<0.01

4557057

20010083

<3.07.0112

<0.601.2053

25.03.28.14.31.310.430.412.440.3945

0.791.900.300.260

<0.50

20.021.0

<0.50

19

Table 4c. Oak Grove sheet, Corehole DDH-2.

Lat.Long.

Fe20| (%)CaONaaOS

Sc (ppm)CrCoNiCuZnAsRbSrSbCsBaYLaCeNdSmEuTbYbLuZrHfNbTaThU

Pd (ppb)PtRh

W-239876 DDH-2-218.3

35°58'N78°49'W

12.089.371.46

<0.01

38162081

6508787

<3.0<2.00

101<0.50

1.104116.02.505.84.11.030.360.321.90

0.29934

0.651.80

0.280<0.40<0.50

12.015.0

<0.50

W-239877 DDH-2-220

35°58'N78°49'W

10.3411.75

1.36<0.01

36101056

3007273

2.304.0103

<0.400.5928.016.02.406.33.41.040.360.311.930.3036

0.681.30

0.160- 0.290<0.40

8.816.01.20

W-239864 W-239878 DDH-2-223 DDH-2-224

35°58'N 35°58'N78°49'W 78°49'W

11.57 11.05 1.85 <0.01

45940 57063 57

310 20093 10069 83 <3.0 7.0 112 <0.60 1.20 53 25.0

0 0 O.fi

8.1 4.3 1.31 0.43 0.41 2.44 0.39 45 0.79 1.90 0.30 0.260 <0.50

20.0 21.0 <0.50

20

Table 5. Cumnock sheet, Sanford basin, and dikes, Sanford and Durham basins.

Lat.Long.

Si02 (%)Ti02A1203Fe3O3FeOMnOMgOCaONaaOK20P205H20+H20~

C02SFClEB (ppm)ScCrCoNiCuZnGaAsRbSrAgSbCsBaYLaCeNdSmEuTbYbLaZrHfNbTaThU

Pd (ppb)PtRhAu

W-223097 NCMR3

25735°29'N79°20'W

49.200.79

16.203.308.500.207.209.802.720.440.141.200.780.02

100.49 3678521308984

12.0184

<0.601.40168357.315.610.02.770.870.623.4

0.50942.003.5

0.2400.83

<0.30

4.64.0

<0.50

W-223096 NCCM1

25835°33'N79°13'W

49.500.79

16.303.208.400.197.409.902.800.480.130.790.610.13

100.62 371145214011879 3.0186

<0.600.42196317.415.812.02.760.850.723.2

0.49922.123.6

0.2500.77

<0.30

11.08.0

<0.50

W-232418 DBF-85

1736° 5'N78°51'W

48.000.73

16.402.208.600.187.90

11.302.160.240.111.200.300.040.17

99.532.0047

2725313013090 3.0136

<0.700.83147325.712.0

<11.02.280.780.603.0

0.51671.40

<2.000.150

<0.80<0.40

3.718.0

<0.50

W-232419 DBF-85

17A36° 5'N78°51'W

48.700.87

15.603.308.600.207.60

11.202.290.320.130.900.300.020.16

100.19<2.00

532855491140110 6.0157

<0.700.46171356.914.08.32.630.920.753.6

0.55761.802.00

0.170<0.90 *<0.60

3.217.0

<0.50

W-243886 FG-87 DB-20

37°58'N78°56'W

47.300.61

16.202.558.100.18

11.1010.901.900.250.101.000.110.050.090.01

<0.00100.45

6.937

48061296966016.0

<1.506.0156

0.0290<0.170<0.30

17121.04.79.9

<5.01.840.690.492.500.39591.201.80

<0.2300.44

<0.40

4.79.4

<4.0

W-243820 JY-1

35°52'N78°56'W

52.401.20

14.003.107.900.177.37

10.802,060.580.150.620.380.020.040.03

<0.00100.82

6.337

2424774946119.01.6028.0185

0.1000.5616622J)1L423-014.03.6L100.722.500.351072.608.5

0.542.300.51

8.014JO 5.4

W-243821 JY-2

35°52'N78°56'W

52.001.15

14.103.087.900.177.56

10.801.950.470.150.630.470.020.050.03

<0.00100.52

6.53727949921077619.01.3017.0177

0.1800.3021720.010.522.012.03.41.100.642.400.34992.508.3

0.502.400.35

8.515.0

<7.0

21