Mineral Resources Statement

A 9.0 million ounce Mineral Resource has already been defined at the Mallina Gold Project, including 6.8 million ounces from the Hemi discovery.

After an extensive drilling program, a high quality maiden Mineral Resource Estimate for Hemi was completed in June 2021.

In June 2021, we updated the Mineral Resource for the Mallina Gold Project to 229.8 million tonnes grading 1.2 g/t gold for 9.0 million ounces.

A table outlining the Mineral Resource Estimate is contained below. The regional resource estimates at the Withnell and Wingina Mining Centres have not changed since the April 2020 statement.

For the latest information on regional exploration, please view our ASX Releases, Corporate Presentations pages and Videos.

Appendix 1: Mallina gold Project Global Mineral Resource Estimate Summary

(Criteria in this section apply to all succeeding sections.)

Mallina Gold Project – Global Mineral Resource Estimate, June 2021

DepositMeasuredIndicatedInferredTotal
MtAu g/tMozMtAu g/tMozMtAu g/tMozMtAu g/tMoz
Hemi Mining Centre65.51.32.8126.91.04.0192.41.16.8
Withnell Mining Centre1.61.80.111.71.80.712.22.20.925.62.01.6
Wingina Mining Centre3.11.70.22.51.50.16.31.20.211.91.40.5
TOTAL Mallina Gold Project4.711.70.379.81.43.6145.31.15.1229.81.29.0

Mallina Gold Project – Mineral Resource Estimate changes, June 2021

Mining CentreMeasuredIndicatedInferredTotal
MtAu g/tMozMtAu g/tMozMtAu g/tMozMtAu g/tMoz
Mineral Resource Estimate, April 2020
Withnell Mining Centre1.61.80.111.71.80.712.22.20.925.62.01.6
Wingina Mining Centre3.11.70.22.51.50.16.31.20.211.91.40.5
Mineral Resource Estimate, June 2021
Hemi Mining Centre65.51.32.8126.91.04.0192.41.16.8
TOTAL Mallina Gold Project 4.711.70.379.81.43.6145.31.15.1229.81.29.0

Mallina Gold Project – Global Mineral Resource Estimate by Type, June 2021

Mining CentreTypeMeasuredIndicatedInferredTotal
MtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu Oz
Hemi Mining Centre
Oxide5.001.4228,5005.470.9151,80010.481.1380,300
Sulphide60.541.32,550,900121.381.03,873,000 181.921.16,424,000
Total65.551.32,779,400126.851.04,024,900192.401.16,804,300
Withnell Mining CentreOxide0.981.857,5002.691.3113,4001.701.474,0005.371.4245,000
Sulphide 0.661.734,8009.021.9550,10010.542.4796,20020.222.11,381,100
Total1.631.892,30011.721.8663,50012.242.2870,20025.582.01,626,100
Wingina Mining CentreOxide2.681.8152,1001.841.587,6002.211.174,9001.401.046,300
Sulphide 0.401.620,5000.681.634,9004.041.3168,4000.631.223,300
Total3.081.7172,7002.521.5122,5006.251.2243,30011.861.4538,400
TOTAL Mallina Gold
Project
Oxide3.661.8209,6009.541.4429,5009.41.0300,70022.61.3939,800
Sulphide1.061.655,30070.241.43,135,900136.01.14,837,600207.31.28,028,900
Total4.711.7265,00079.791.43,565,400145.31.15,138,300229.81.28,968,800

Mallina Gold Project – Mineral Resource Estimate by Deposit, June 2021

Hemi – Mining Centre

DepositTypeMeasuredIndicatedInferredTotal
MtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu Oz
BrolgaOxide1.321.457,3002.250.855,7003.571.0113,000
Sulphide26.771.31,148,30032.471.0994,70059.241.12,142,900
Total28.091.31,205,60034.720.91,050,30062.811.12,255,900
AquilaOxide1.001.445,1000.230.54,0001.231.249,100
Sulphide 9.641.5479,6007.221.3312,10016.861.5791,700
Total10.641.5524,7007.451.3316,10018.091.4840,700
CrowOxide0.971.031,5001.070.930,2002.030.961,700
Sulphide 8.851.1320,40018.461.1649,90027.311.1970,400
Total9.811.1352,00019.531.1680,10029.341.11,032,100
FalconOxide1.711.794,5000.551.017,6002.271.5112,100
Sulphide15.291.2602,70016.101.0511,20031.381.11,113,900
Total17.001.3697,20016.651.0529,70033.651.11,226,800
Diucon/Eagle Oxide1.381.044,4001.381.044,400
Sulphide47.140.91,405,10047.140.91,405,100
Total48.520.91,449,50048.520.91,449,500
Hemi Mining
Centre
Oxide5.001.4228,5005.470.9151,80010.481.1380,300
Sulphide60.541.32,550,900121.381.03,873,000181.921.16,424,000
Total65.551.32,779,400126.851.04,024,900192.401.16,804,300
Withnell – Mining Centre
DepositTypeMeasuredIndicatedInferredTotal
MtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu Oz
Withnell Open PitOxide0.631.428,5000.361.214,4000.151.15,3001.141.348,200
Fresh 0.631.633,2002.681.9163,5000.532.238,0003.851.9234,700
Total1.261.561,7003.051.5177,8000.632.043,3004.991.8282,900
Withnell UndergroundOxide0.002.53000.002.5300
Fresh 0.114.315,6002.383.9301,1002.503.9316,700
Total0.114.315,6002.393.9301,4002.503.9317,100
MallinaOxide0.711.330,2001.681.372,3002.391.3102,500
Fresh 0.901.233,9003.471.5171,1004.361.5204,900
Total1.611.264,1005.151.5243,3006.761.4307,400
Toweranna UndergroundOxide
Fresh 0.563.664,5000.563.664,5000.563.664,500
Total0.563.564,5000.563.664,5000.563.664,500
CamelOxide0.182.816,4000.322.626,8000.041.11,5000.542.644,700
Fresh 0.012.16000.141.46,5000.141.88,6000.291.715,700
Total0.192.817,0000.462.233,3000.191.710,1000.842.260,400
CalvertOxide0.431.317,9000.050.81,4000.481.319,300
Fresh 0.561.323,8000.231.29,3000.791.333,100
Total0.991.341,7000.281.210,7001.271.352,400
RoeOxide0.062.75,5000.131.56,0000.111.65,7000.301.817,200
Fresh 0.012.51,0000.072.35,3000.212.214,8000.302.221,100
Total0.082.76,5000.201.811,3000.332.020,5000.602.038,300
DromedaryOxide0.102.27,2000.031.61,4000.041.64,7000.171.910,800
Fresh 0.031.61,7000.081.82,2000.121.76,400
Total0.102.27,2000.061.63,2000.121.74,7000.291.917,200
Leach PadOxide0.860.719,3000.860.719,300
Fresh
Total0.860.719,3000.860.719,300
HesterOxide0.042.13,0000.031.31,1000.071.84,100
Fresh 0.012.19000.051.42,1000.071.63,100
Total0.062.13,9000.071.43,3000.131.77,200
Withnell Mining CentreOxide0.981.857,5003.491.5166,8002.351.4102,3006.821.5326,600
Fresh 0.661.734,8008.231.9496,7009.872.4766,60018.752.21,298,200
Total1.631.892,30011.721.8663,50012.242.2870,20025.582.01,626,100
Wingina – Mining Centre
TypeMeasuredIndicatedInferredTotal
MtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu Oz
WinginaOxide2.681.8154,1000.651.327,0000.341.314,4003.671.6193,500
Fresh 0.401.620,5000.341.516,3001.081.757,4001.821.694,200
Total3.081.7172,7000.991.443,3001.421.671,7005.491.6287,700
Mt BerghausOxide0.681.838,9000.991.135,8001.671.474,700
Fresh 0.271.714,4002.401.291,8002.671.2106,300
Total0.951.753,3003.391.2127,6004.341.3181,000
AmandaOxide0.511.321,7000.890.924,7001.401.046,300
Fresh 0.071.84,2000.561.119,2000.631.223,300
Total0.581.425,8001.440.943,9002.031.169,700
Withnell Mining CentreOxide2.681.8152,1001.841.587,6002.211.174,9006.741.5314,500
Fresh 0.401.620,5000.681.634,9004.041.3168,4005.121.4223,800
Total3.081.7172,7002.521.5122,5006.251.2243,20011.861.4538,400

De Grey Mining Limited Quarterly Activities Report 22

In April 2020, we updated the Mineral Resource for the Mallina Gold Project to 37.4 million tonnes grading 1.8g/t gold for 2.2 million ounces. The majority of this estimate lies within shear-hosted deposits with Toweranna being the only intrusion-hosted resource defined to date.

A table outlining this April 2020 Mineral Resource is contained below.

After an extensive drilling program, a high quality maiden Mineral Resource Estimate for Hemi is expected to be completed by mid-2021.

For the latest information on regional exploration, please view our ASX Releases or Corporate Presentation pages

Total Gold Mineral Resource (July 2019) at the Pilbara Gold Project by Mining Centre
AreaTypeMeasuredIndicatedInferredTotal
MtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu Oz
Withnell
Mining Centre
Oxide
Fresh
0.92
0.62
1.9
1.7
55,400
33,500
3.05
6.77
1.5
2.1
151,900
463,100
1.12
5.30
1.3
2.3
48,200
389,300
5.09
12.69
1.6
2.2
255,500
885,800
Total1.541.888,9009.821.9615,0006.432.1437,50017.792.01,141,500
Wingina
Mining Centre
Oxide
Fresh
2.68
0.40
1.8
1.6
152,100
20,500
1.84
0.68
1.5
1.6
87,600
34,900
2.21
4.04
1.1
1.3
74,900
168,400
6.74
5.12
1.5
1.4
314,500
223,800
Total3.081.7172,7002.521.5122,5006.251.2243,20011.861.4538,400
TOTAL
Pilbara Gold Project
Oxide
Fresh
3.60
1.02
1.8
1.6
207,600
54,000
4.90
7.45
1.5
2.1
239,400
498,000
3.34
9.34
1.1
1.9
123,100
557,600
11.83
17.81
1.5
1.9
570,100
1,109,700
Total4.621.8261,60012.351.9737,50012.681.7680,70029.651.81,679,700

July 2019 Total Gold Mineral Resource (JORC 2012) by deposit

Withnell – Mining Centre

DepositTypeMeasuredIndicatedInferredTotal
MtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu Oz
Withnell
Open Pit
Oxide
Fresh
0.58
0.60
1.4
1.7
26,400
31,900
0.15
1.02
1.6
2.0
7,700
65,900
0.04
0.04
1.3
2.8
1,700
3,800
0.77
1.66
1.4
1.9
35,800
101,600
Total1.171.558,3001.172.073,7000.0482.05,5002.431.8137,400
Withnell
Underground
Oxide
Fresh
0.03
0.64
2.9
4.4
2,800
91,200
0.00
1.55
4.4
4.0
200
197,700
0.03
2.19
3.0
4.1
3,000
288,900
Total0.674.494,0001.554.0197,9002.224.1291,900
Mallina Oxide
Fresh
0.45
0.81
1.3
1.2
19,100
31,400
0.55
2.01
1.2
1.4
21,300
88,800
1.00
2.82
1.3
1.3
40,500
120,200
Total1.261.250,6002.571.3110,1003.831.3160,700
TowerannaOxide
Fresh
0.62
3.49
2.4
2.1
47,700
236,300
0.25
0.98
1.6
1.9
13,100
59,500
0.86
4.46
2.2
2.1
60,800
295,800
Total4.102.2284,0001.231.872,6005.332.1356,600
CamelOxide
Fresh
0.18
0.01
2.8
2.1
16,400
600
0.32
0.14
2.6
1.4
26,800
6,500
0.04
0.14
1.1
1.8
1,500
8,600
0.54
0.29
2.6
1.7
44,700
15,700
Total0.192.817,0000.462.233,3000.191.710,1000.842.260,400
CalvertOxide
Fresh
0.43
0.56
1.3
1.3
17,900
23,800
0.05
0.23
0.8
1.2
1,400
9,300
0.48
0.79
1.3
1.3
19,300
33,100
Total0.991.341,7000.281.210,701.271.352,400
RoeOxide
Fresh
0.06
0.01
2.7
2.5
5,500
1,000
0.13
0.07
1.5
2.3
6,000
5,300
0.11
0.21
1.6
2.2
5,700
14,800
0.30
0.30
1.8
2.2
17,200
21,100
Total0.082.76,5000.201.811,3000.332.020,5000.602.038,300
DromedaryOxide
Fresh
0.102.27,2000.03
0.03
1.6
1.6
1,400
1,700
0.04
0.08
1.6
1.8
2,200
4,700
0.17
0.12
1.9
1.7
10,800
6,400
Total0.102.27,2000.061.63,2000.121.76,9000.291.917,200
Leach PadOxide
Fresh
0.860.719,3000.860.719,300
Total0.860.719,3000.860.719,300
HesterOxide
Fresh
0.04
0.01
2.1
2.1
3,000
900
0.03
0.05
1.3
1.4
1,100
2,100
0.07
0.06
1.8
1.6
4,100
3,100
Total0.062.13,9000.071.43,3000.131.77,200
Withnell
Mining Centre
Oxide
Fresh
0.92
0.62
1.9
1.7
55,400
33,500
3.05
6.77
1.5
2.1
151,900
463,100
1.12
5.30
1.3
2.3
48,200
389,300
5.09
12.69
1.6
2.2
255,500
885,800
Total1.541.888,9009.821.9615,0006.432.1437,50017.792.01,141,400
Wingina – Mining Centre
TypeMeasuredIndicatedInferredTotal
MtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu Oz
Wingina
Oxide
Fresh
2.68
0.40
1.8
1.6
152,100
20,500
0.65
0.34
1.3
1.5
27,000
16,300
0.34
1.08
1.3
1.7
14,400
57,400
3.67
1.82
1.6
1.6
193,500
94,200
Total3.081.7172,7000.991.443,3001.421.671,7005.491.6287,700
Mt BerghausOxide
Fresh
0.68
0.27
1.8
1.7
38,900
14,400
0.99
2.40
1.1
1.2
35,800
91,800
1.67
2.67
1.4
1.2
74,700
106,300
Total0.951.753,3003.391.2127,600
4.341.3181,000
AmandaOxide
Fresh
0.51
0.07
1.3
1.8
21,700
4,200
0.89
0.56
0.9
1.1
24,700
19,200
1.40
0.63
1.0
1.2
46,300
23,300
Total0.581.425,8001.440.943,9002.031.169,700
Wingina
Mining Centre
Oxide
Fresh
2.68
0.40
1.8
1.6
152,100
20,500
1.84
0.68
1.5
1.6
87,600
34,900
2.21
4.04
1.1
1.3
74,900
168,400
6.74
5.12
1.5
1.4
314,500
223,800
Total3.081.7172,7002.521.5122,5006.251.2243,20011.861.4538,400

Within the same 1,500 km2 tenement package it also controls base metals resources (zinc, lead with associated silver) and a lithium exploration prospect.

In addition to the hard-rock gold resource, the company has three conglomerate gold targets where gold nuggets have already been discovered.

DepositTypeMeasuredIndicatedInferredTotal
MtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu Oz
Withnell Open PitOxide0.631.428,5000.361.214,4000.151.15,3001.141.348,200
Fresh 0.631.633,2002.681.9163,5000.532.238,0003.851.9234,700
Total1.261.561,7003.051.5177,8000.632.043,3004.991.8282,900
Withnell UndergroundOxide0.002.53000.002.5300
Fresh 0.114.315,6002.383.9301,1002.503.9316,700
Total0.114.315,6002.393.9301,4002.503.9317,100
MallinaOxide0.711.330,2001.681.372,3002.391.3102,500
Fresh 0.901.233,9003.471.5171,1004.361.5204,900
Total1.611.264,1005.151.5243,3006.761.4307,400
Toweranna UndergroundOxide
Fresh 0.563.664,5000.563.664,5000.563.664,500
Total0.563.564,5000.563.664,5000.563.664,500
CamelOxide0.182.816,4000.322.626,8000.041.11,5000.542.644,700
Fresh 0.012.16000.141.46,5000.141.88,6000.291.715,700
Total0.192.817,0000.462.233,3000.191.710,1000.842.260,400
CalvertOxide0.431.317,9000.050.81,4000.481.319,300
Fresh 0.561.323,8000.231.29,3000.791.333,100
Total0.991.341,7000.281.210,7001.271.352,400
RoeOxide0.062.75,5000.131.56,0000.111.65,7000.301.817,200
Fresh 0.012.51,0000.072.35,3000.212.214,8000.302.221,100
Total0.082.76,5000.201.811,3000.332.020,5000.602.038,300
DromedaryOxide0.102.27,2000.031.61,4000.041.64,7000.171.910,800
Fresh 0.031.61,7000.081.82,2000.121.76,400
Total0.102.27,2000.061.63,2000.121.74,7000.291.917,200
Leach PadOxide0.860.719,3000.860.719,300
Fresh
Total0.860.719,3000.860.719,300
HesterOxide0.042.13,0000.031.31,1000.071.84,100
Fresh 0.012.19000.051.42,1000.071.63,100
Total0.062.13,9000.071.43,3000.131.77,200
Withnell Mining CentreOxide0.981.857,5003.491.5166,8002.351.4102,3006.821.5326,600
Fresh 0.661.734,8008.231.9496,7009.872.4766,60018.752.21,298,200
Total1.631.892,30011.721.8663,50012.242.2870,20025.582.01,626,100
TypeMeasuredIndicatedInferredTotal
MtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu OzMtAu g/tAu Oz
WinginaOxide2.681.8154,1000.651.327,0000.341.314,4003.671.6193,500
Fresh 0.401.620,5000.341.516,3001.081.757,4001.821.694,200
Total3.081.7172,7000.991.443,3001.421.671,7005.491.6287,700
Mt BerghausOxide0.681.838,9000.991.135,8001.671.474,700
Fresh 0.271.714,4002.401.291,8002.671.2106,300
Total0.951.753,3003.391.2127,6004.341.3181,000
AmandaOxide0.511.321,7000.890.924,7001.401.046,300
Fresh 0.071.84,2000.561.119,2000.631.223,300
Total0.581.425,8001.440.943,9002.031.169,700
Withnell Mining CentreOxide2.681.8152,1001.841.587,6002.211.174,9006.741.5314,500
Fresh 0.401.620,5000.681.634,9004.041.3168,4005.121.4223,800
Total3.081.7172,7002.521.5122,5006.251.2243,20011.861.4538,400
Scroll to Top