9 March 2021
ASX CODE: MTB
KIHABE POLYMETALLIC DEPOSIT, BOTSWANA
COPPER GRADES NOT CURRENTLY INCLUDED IN THE MINERAL RESOURCE ESTIMATE
Previous Assessment
On 7 September 2020, the Company released an announcement to the ASX, headed 'Kihabe Polymetallic Deposit - Copper Grades not currently Included in the Mineral Resource Estimate'.
This announcement shows that in the NE sector of the Kihabe Deposit, some 15 drill holes intersected potentially commercial copper grades over 600m strike length from section 11,200mE to Section 11,800mE.
In March 2007, Ravensgate, independent geological consultants, compiled an Inferred Mineral Resource estimate (under the 2004 JORC Code) for copper at various low-grade cuts in this NE sector of the Kihabe Deposit (Refer to Table 1).
Because focus on the Kihabe resource at the time only concentrated on Zn/Pb/Ag, none of the additional credits for Vanadium, Germanium and Copper were taken into account.
Recent Assessment
Following increases in the copper price since September 2020, currently in excess of US $8,800/t, the Company has conducted further in-depth assessment of this zone where Cu occurs in association with the Zn/Pb/Ag/Ge/V mineralisation.
This recent assessment has taken into account results from five additional diamond core holes drilled into the area of Cu mineralisation since Ravensgate compiled the Inferred Mineral Resource Estimate (Refer Table 2 and Figure 1). The assessment has shown:
• This zone of Cu mineralisation now extends from 11,200mE to 12,000mE, covering a potential strike length of 800m.
• The 17 drill holes now taken into account show that the average width of Cu mineralisation per drill hole amounts to 18.4m
• The average grade of the mineralised intersections of the 17 drill holes amounts to 0.27% Cu/t.
• Results from the five additional diamond core holes (highlighted in orange in Table 2) will enable the Company to better understand the continuity of the Cu mineralised zones.
• Subject to funding, the results from the five additional diamond core holes will enable the Company to more precisely plan future in-fill drilling programmes. Lines of drill holes in this area are mainly 100m apart, which now need to be reduced.
Further Leach Extraction and Mineralogical Test Work
Further leach test work is being conducted to confirm the Zn metal on site recoveries from the Kihabe oxide zone. Mineralogical test work is also being conducted to confirm the host mineral of Vanadium in the Kihabe oxide zone. At the Nxuu Deposit, 7km to the east of the Kihabe Deposit, the host mineral of Vanadium has been confirmed as Descloizite. In Descloizite, Vanadium Pentoxide (V2O5) is 1.785 times the grade of Vanadium (V).
All assay results from drill holes shown in Table 2 have previously been released to ASX.
The Kihabe Deposit with various zones of Zn/Pb/Ag/Cu/Ge/V mineralisation covers an overall strike length of 2,400m and is situated 7km West of the Nxuu Deposit.
The 2004 JORC Code Kihabe Deposit Mineral Resource Statement, showing the Zn equivalent grade for only Zn/Pb/Ag, is attached as Table 3.
Table 1
Mineral Resource Statement - 16 March 2007
(2004 JORC Code) - Kihabe Base Metals
Deposit - Cu Mineralisation - Inferred Resource - Reported at % Cu lower cut-offs
Table 2
HOLE ID | COORDINATES | DIP | AZI-MUTH | INTERVAL | Copper Grade % | Oxide (O)/ Sulphide (S) | |||
Easting | Northing | Degrees | Degrees | From (m) | To (m) | Width (m) | |||
Section 11,200E | |||||||||
KRC092 | 11,200E | 10.070N | -60 | 160 | 65 | 67 | 2 | 0.18 | S |
71 | 73 | 2 | 0.13 | S | |||||
74 | 76 | 2 | 0.13 | S | |||||
78 | 83 | 5 | 0.14 | S | |||||
103 | 105 | 2 | 0.42 | S | |||||
KRC093 | 11,200E | 10,100N | -60 | 159 | 100 | 109 | 9 | 0.14 | S |
123 | 126 | 3 | 0.19 | S | |||||
Section 11,300E | |||||||||
KRC090 | 11,300E | 10.114N | -60 | 159 | 136 | 146 | 10 | 0.16 | S |
Section 11,450E | |||||||||
KDD140 | 11,450E | 10,100N | -60 | 339 | 73 | 77 | 4 | 0.13 | S |
91 | 97.50 | 6.50 | 0.67 | S | |||||
Section 11,500E | |||||||||
KDD114 | 11,500E | 10,073N | -90 | 0 | 9 | 54 | 45 | 0.16 | O |
60 | 63 | 3 | 0.13 | O | |||||
66 | 68 | 2 | 0.39 | S | |||||
97 | 99 | 2 | 0.94 | S | |||||
101 | 104 | 3 | 0.15 | S | |||||
106 | 117 | 11 | 0.37 | S | |||||
inc | 116 | 117 | 1 | 1.44 | S | ||||
118 | 128 | 10 | 0.43 | S | |||||
inc | 125 | 126 | 1 | 1.22 | S | ||||
KRC049 | 11,500E | 10,099N | -60 | 159 | 28 | 31 | 3 | 0.15 | O |
32 | 47 | 15 | 0.17 | O | |||||
50 | 65 | 15 | 0.27 | O | |||||
KRC052 | 11,500E | 10,129N | -60 | 159 | 63 | 65 | 2 | 0.12 | O |
69 | 77 | 8 | 0.12 | S | |||||
80 | 84 | 4 | 0.11 | S | |||||
86 | 89 | 3 | 0.15 | S | |||||
92 | 94 | 2 | 0.16 | S | |||||
115 | 121 | 6 | 0.20 | S | |||||
122 | 140 | 18 | 0.43 | S | |||||
inc | 125 | 127 | 2 | 0.75 | S | ||||
inc | 130 | 133 | 3 | 0.76 | S | ||||
Section 11,600E | |||||||||
KDD115 | 11,600E | 9,900N | -60 | 339 | 38 | 39 | 1 | 0.20 | O |
50 | 51 | 1 | 0.16 | O | |||||
119 | 120 | 1 | 0.11 | S | |||||
151 | 152 | 1 | 0.10 | S | |||||
181 | 182 | 1 | 0.11 | S | |||||
KDD143 | 11,600E | 10,010N | -60 | 339 | 45 | 47 | 2 | 0.12 | O |
52 | 54 | 2 | 0.13 | O | |||||
112 | 113 | 1 | 0.12 | S | |||||
126 | 130 | 4 | 0.22 | S |
Table 2 (cont'd)
HOLE ID | COORDINATES | DIP | AZI-MUTH | INTERVAL | Copper Grade % | Oxide (O)/ Sulphide (S) | |||
Easting | Northing | Degrees | Degrees | From (m) | To (m) | Width (m) | |||
Section 11,600E | |||||||||
KIH007 | 11,607E | 10,037N | -60 | 339 | 62 | 64 | 2 | 0.12 | O |
95 | 96 | 1 | 2.45 | S | |||||
98 | 101 | 3 | 0.18 | S | |||||
135 | 138 | 3 | 0.43 | S | |||||
inc | 136 | 137 | 1 | 1.06 | S | ||||
KRC056 | 11,600E | 10,110N | -60 | 159 | 61 | 64 | 3 | 0.17 | O |
69 | 71 | 2 | 0.13 | O | |||||
72 | 75 | 3 | 0.16 | S | |||||
99 | 101 | 2 | 0.21 | S | |||||
KRC058 | 11,595E | 10,130N | -60 | 159 | 87 | 91 | 4 | 0.24 | S |
92 | 95 | 3 | 0.52 | S | |||||
112 | 115 | 3 | 0.19 | S | |||||
Section 11,700E | |||||||||
KRC072 | 11,700E | 10,150N | -60 | 159 | 125 | 130 | 5 | 0.28 | S |
137 | 141 | 4 | 0.20 | S | |||||
Section 11,770E | |||||||||
KIH011 | 11,769E | 10,124N | -60 | 339 | 54 | 56 | 2 | 0.18 | O |
60 | 62 | 2 | 0.39 | S | |||||
63 | 66 | 3 | 0.32 | S | |||||
71 | 78 | 7 | 1.04 | S | |||||
81 | 86 | 5 | 0.21 | S | |||||
87 | 89 | 2 | 0.39 | S | |||||
Section 11,800E | |||||||||
KRC076 | 11,800E | 10,075N | -60 | 159 | 17 | 37 | 20 | 0.28 | O |
inc | 23 | 25 | 2 | 0.71 | O | ||||
42 | 47 | 5 | 0.31 | O | |||||
inc | 46 | 47 | 1 | 1.34 | O | ||||
KRC077 | 11,800E | 10,090N | -60 | 159 | 37 | 43 | 6 | 0.23 | O |
Section 12,000E | |||||||||
KDD117 | 12,000E | 11,090N | -60 | 159 | 76 | 78 | 2 | 0.23 | S |
82 | 86 | 4 | 0.19 | S | |||||
92 | 93 | 1 | 0.29 | S | |||||
106 | 110 | 4 | 0.22 | S | |||||
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Mount Burgess Mining NL published this content on 09 March 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 17 March 2021 05:21:09 UTC.