High grade NdPr drill results expected to upgrade resource and extend mine life
(firmenpresse) -
Pensana Metals Ltd (ASX: PM8) is pleased to report assay results received from a further 41 drill holes of the 7,000 metre, infill and extension drilling programme at the Longonjo NdPr Project in Angola. The drilling programme is being undertaken in support of the Definitive Feasibility Study (DFS).
- The new results include high grade shallow intersections from an area 600 metres west of the current Preliminary Feasibility Study (PFS) pit design.
- The infill drilling demonstrates the continuity of this 400m long zone of weathered mineralisation, which remains open to the north.
- The company expects the infill drilling will allow this area of Inferred category mineralisation to be upgraded to the Indicated category of mineral resource, allowing its inclusion into the mine plan
- Drilling also intersected continuous zones of fresh rock hosted mineralisation above 3% REO from surface
Drill hole- Intersection
LRC197: -14 metres at 5.85% REO including 1.07% NdPr from 4 metres
LRC203:-36 metres at 6.74% REO including 1.10% NdPr from 16 metres
LRC214:-10 metres at 4.65% REO including 0.95% NdPr from surface
LRC219:-13 metres at 4.36% REO including 0.93% NdPr from surface to end of hole
LRC220:-18 metres at 4.01% REO including 0.87% NdPr from surface
*NdPr = neodymium - praseodymium oxide. REO = total rare earth oxides. Intersections reported at a +0.4% NdPr lower grade cut off. See Table 1 for details of all new results, including wider intersections at a +0.2% NdPr cut
Executive Director & COO Dave Hammond commented:
These high grade drill results are from well outside the limits of the current pit design and suggest the potential to extend the open pit and mine life at Longonjo.
The drilling programme is now complete and we look forward to reporting results from a further 138 drill holes. Areas of deep weathering have been intersected in the north and south of the project that are also outside of the mine plan as defined by the PFS.
Assay results are also awaited from infill drill holes in the main high grade weathered zone, as well as from the first systematic drill testing of a zone of fresh rock hosted mineralisation that has the potential to add a further dimension to the project.
We expect to be able to upgrade significant amounts of currently Inferred Mineral Resource to the higher Indicated JORC category, thereby extending the current mine life at Longonjo after the completion of additional Definitive Feasibility Study work programmes.
Authorised by the Board of Pensana Rare Earths Plc
For further information please contact Tim George (CEO) at:
contact(at)pensana.co.uk
Technical Report
A second batch of assay results have been received from the +7,000m infill and extension reverse circulation drilling programme now just completed at Longonjo. The drilling is in support of Definitive Feasibility Studies in progress with Wood Group as lead engineers.
The new results are from 41 drill holes predominantly infilling areas of Inferred mineralisation on the margins or well outside of the current PFS pit design and Indicated Mineral Resource (ASX Announcement 15 November 2019).
https://www.irw-press.at/prcom/images/messages/2020/51260/20200316 PM8 March 2020 RC Drill Results ASX Final_Prcom.001.png
Figure 1: Plan view of the location of new assay results (red) and completed new drill holes with results outstanding (black) over the +0.2% NdPr November 2019 Mineral Resource estimate block model for the weathered mineralisation. The current extent of the Indicated category Mineral Resource estimate is highlighted.
The programme is designed to increase the November 2019 PFS nine year mine life through the infill drilling of the large area of Inferred category Mineral Resource, the majority of which was excluded from the initial mine plan.
The Indicated category weathered zone Mineral Resource has also been infilled to support an upgrade to the Measured category and, after the completion of further DFS engineering studies, to support Probable or Proved Ore Reserves.
The drilling will also test the potential for substantial fresh rock hosted mineralisation immediately beneath the weathered zone by systematically extending drill holes to 80 metres depth in the 450 metre by 350 metre initial target area.
The new results from 41 drill holes predominantly infilling areas of Inferred mineralisation outside of the pit design include several high grade intersections:
Drill hole- Intersection*
LRC190: -18 metres at 3.32% REO including 0.73% NdPr from surface
LRC191: -13 metres at 3.65% REO including 0.77% NdPr from surface to end of hole
LRC196: -12 metres at 3.30% REO including 0.74% NdPr from 6 metres
LRC197: -14 metres at 5.85% REO including 1.07% NdPr from 4 metres
LRC203:-36 metres at 6.74% REO including 1.10% NdPr from 16 metres
LRC204:-22 metres at 3.61% REO including 0.83% NdPr from 2 metres
LRC212:-36 metres at 3.30% REO including 0.75% NdPr from surface to end of hole
LRC214:-10 metres at 4.65% REO including 0.95% NdPr from surface
LRC219:-13 metres at 4.36% REO including 0.93% NdPr from surface to end of hole
LRC220:-18 metres at 4.01% REO including 0.87% NdPr from surface
*NdPr = neodymium - praseodymium oxide. REO = total rare earth oxides. Intersections reported at a +0.4% NdPr lower grade cut off. See Table 1 for details of all new results, including wider intersections at a +0.2% NdPr cut
The new high grade intersections demonstrate the continuity of a 400 metre zone of high grade mineralisation located 600 metres outside of the PFS 9 year mine design (Figure 2).
The near surface weathered mineralisation remains open to the north and the company expects to upgrade this area of Inferred category Mineral Resource to Indicated and allow its inclusion in an extended mine plan for the DFS.
https://www.irw-press.at/prcom/images/messages/2020/51260/20200316 PM8 March 2020 RC Drill Results ASX Final_Prcom.002.png
Figure 2: Location of new drilling results (red) and intersection highlights over the +0.2% NdPr November 2019 Mineral Resource estimate block model (blue) for the weathered mineralisation and the 9 year PFS open pit (see previous figure for legend and location). Results from the green drill holes reported in January also support the potential to extend the open pit into this area.
https://www.irw-press.at/prcom/images/messages/2020/51260/20200316 PM8 March 2020 RC Drill Results ASX Final_Prcom.003.jpeg
Figure 3: Vertical east - west section 8,571,060mN looking north. New high grade drill intersections demonstrate the continuity and northward extension of the continuous blanket of weathered zone NdPr mineralisation located 600 metres west of the current open pit design.
Additional new high grade drill intersections received from the centre of the project extend the weathered mineralisation to the west and north (see plan Figure 4 and drill section Figure 5).
https://www.irw-press.at/prcom/images/messages/2020/51260/20200316 PM8 March 2020 RC Drill Results ASX Final_Prcom.004.png
Figure 4: Plan showing location of new drilling results (red) and intersection highlights over the +0.2% NdPr November 2019 Mineral Resource estimate block model (blue) for the weathered mineralisation and the 9 year PFS open pit (see previous figure for location).
Drill holes LRC215 and LRC216 lie on the northern extension of the fresh rock target and intersected fresh rock from surface, returning grades averaging above 3% REO down their entire lengths. Fresh rock hosted mineralisation remains open at depth, to the north and south (Figure 4):
Drill hole- Fresh rock Intersection*
LRC215: -15 metres at 3.26% REO including 0.70% NdPr from surface to end of hole
LRC216: -12 metres at 3.35% REO including 0.63% NdPr from surface to end of hole
* Intersections reported at a +0.2% NdPr lower grade cut off. See Table 1 for summary details of all new drill holes reported.
https://www.irw-press.at/prcom/images/messages/2020/51260/20200316 PM8 March 2020 RC Drill Results ASX Final_Prcom.005.jpeg
Figure 5: Vertical east - west section 8,571,400mN looking north. New infill drilling has identified some very high grades that are expected to enhance the Mineral Resource estimate in these areas (LRC180 and LRC189). The infill drilling confirms the continuity of mineralisation in the weathered zone for a further 250 metres west of the limit of the 9 year PFS open pit.
Samples from a further 138 drill holes have been despatched from site for analysis and the Company looks forward to providing further updates as results are received.
An updated Mineral Resource estimate for Longonjo that will incorporate the new drilling is on schedule for completion in May 2020.
Competent Persons Statement
The information in this report that relates to Geology, Data Quality and Exploration results is based on information compiled and/or reviewed by David Hammond, who is a Member of The Australasian Institute of Mining and Metallurgy. David Hammond is the Chief Operating Officer and a Director of the Company. He has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and the activity which he is undertaking to qualify as a Competent Person in terms of the 2012 Edition of the Australian Code for the Reporting of Exploration Results, Mineral Resources and Ore Reserves. David Hammond consents to the inclusion in the report of the matters based on his information in the form and contest in which it appears.
The information in this statement that relates to the 2019 Mineral Resource estimates is based on work done by Rodney Brown of SRK Consulting (Australasia) Pty Ltd. Rodney Brown is a member of The Australasian Institute of Mining and Metallurgy and has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration, and to the activity he is undertaking, to qualify as a Competent Person in terms of The Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code 2012 edition).
The Company confirms that it is not aware of any new information or data that materially affects the information included in the above original market announcements. The Company confirms that the form and context in which the Competent Persons findings are presented have not been materially modified from the original market announcement.
Table 1: Longonjo NdPr Project, RC drill intersections at least 4m thick and 0.20% NdPr lower grade cut. Intersections > 0.40% NdPr lower grade cut shown in bold italics
Hole East North RL Hole From To IntervaREO %NdPr %
ID Depth (m) (m)l
(m) (m)
LRC190523,938,571,11,61621 0 18 18 3.32 0.73
7 88
LRC191523,898,571,11,59813 0 13 13eoh 3.65 0.77
4 04
LRC192523,818,571,11,59814 0 10 10 2.02 0.51
9 65 (incl.0 6 6 2.34 0.59)
LRC193523,118,571,01,62029 10 22 12 0.65 0.30
1 64
LRC194523,168,571,01,61029 2 6 4 0.67 0.22
1 62
LRC195523,218,571,01,59845 0 12 12 1.14 0.37
1 52 (incl.0 6 6 1.55 0.49
20 24 4 1.27 0.35
32 42 10 1.25 0.55
LRC196523,268,571,01,59025 0 20 20 2.49 0.58
7 64 (incl.6 18 12 3.30 0.74)
LRC197523,318,571,01,58240 0 26 26 3.86 0.74
6 63 (incl.4 18 14 5.85 1.07)
LRC198523,198,570,91,58440 0 10 10 0.88 0.31
0 60 22 36 14 1.01 0.30
LRC199523,288,570,91,57226 0 18 18 1.81 0.55
4 59
LRC200523,388,570,91,56436 0 6 6 2.44 0.49
6 59
LRC201523,278,570,81,56236 0 12 12 1.48 0.48
5 77 (incl.2 8 6 2.03 0.69)
16 28 12 2.21 0.65
(incl.18 24 6 3.15 0.91)
LRC202523,318,570,81,55833 0 16 16 2.26 0.50
5 85 22 28 6 1.05 0.23
LRC203523,378,570,81,55555 0 8 8 2.17 0.44
2 80 16 52 36 6.74 1.10
LRC2045233378570800 33 0 33 33eoh 2.84 0.65
(incl.2 24 22 3.61 0.83)
LRC205523,458,570,81,54723 0 10 10 3.45 0.59
1 01 16 20 4 1.89 0.30
LRC206523,618,570,81,55626 0 16 16 1.67 0.33
4 98 (incl.0 4 4 2.88 0.55
22 26 4eoh 1.10 0.21
LRC207523,528,570,81,55833 0 14 14 1.43 0.29
1 95 24 33 9eoh 1.83 0.20
LRC208523,428,570,81,55633 0 8 8 2.04 0.40
1 80 (incl.0 4 4 2.85 0.50)
LRC209524,098,571,21,62817 0 14 14 2.52 0.55
8 99
LRC210524,008,571,31,64322 0 20 20 2.40 0.58
0 07 (incl.0 8 8 2.97 0.74
and 10 20 10 2.25 0.53)
LRC211523,908,571,21,63926 0 26 26eoh 2.03 0.38
8 89 (incl.0 6 6 3.52 0.61)
LRC212524,098,571,31,64936 0 36 36eoh 3.30 0.75
6 99
LRC213524,288,571,41,66013 0 8 8 1.88 0.48
8 97 (incl.0 4 4 2.58 0.65)
LRC214523,998,571,31,65624 0 24 24eoh 3.23 0.69
6 94 (incl.0 10 10 4.65 0.95
and 14 24 10eoh 2.44 0.56)
LRC215524,208,571,41,63715 0 15 15eoh 3.26 0.70
6 04
LRC216524,248,571,31,63412 0 12 12eoh 3.35 0.63
7 99 (incl.0 10 10 3.64 0.68)
LRC217524,338,571,31,63915 0 15 15eoh 2.46 0.58
8 96 (incl.0 12 12 2.65 0.64)
LRC218524,308,571,41,63811 0 11 11eoh 2.12 0.47
1 04 (incl.0 6 6 2.64 0.59)
LRC219524,478,571,31,62813 0 13 13eoh 4.36 0.93
3 00
LRC220524,438,571,31,62719 0 18 18 4.01 0.87
4 01
LRC221524,448,571,61,71623 0 23 23eoh 1.01 0.45
8 00 (incl.0 4 4 1.76 0.44
and 8 18 10 2.51 0.55)
LRC222524,438,571,81,70965 0 12 12 1.39 0.29
0 01 32 56 24 1.50 0.29
(incl.40 44 4 1.93 0.40)
LRC223524,388,571,81,69834 0 6 6 1.26 0.29
0 07
LRC224524,408,571,51,70725 0 25 25eoh 2.20 0.51
3 97 (incl.0 12 12 2.24 0.54
and 16 25 9eoh 2.46 0.54)
LRC225523,608,570,71,55120 0 4 4 1.84 0.45
* 0 21
LRC226523,708,570,61,56926 0 4 4 1.19 0.31
* 5 57
LRC227523,908,570,51,58930 0 12 12 2.26 0.53
* 0 80 (incl.0 4 4 4.39 0.80)
16 20 4 1.76 0.34
24 30 6eoh 1.64 0.28
LRC228522,608,571,01,55274 6 22 16 0.93 0.34
* 2 27 32 40 8 0.87 0.33
42 62 20 2.00 0.74
(incl.44 60 16 2.29 0.85)
LRC229523,898,570,61,58430 0 30 30eoh 2.06 0.38
* 6 53 (incl.0 8 8 3.46 0.66)
LRC230523,998,570,51,59335 6 12 6 1.88 0.36
* 6 94 16 20 4 2.07 0.39
24 30 6 1.02 0.28
*All holes are vertical reverse circulation except for LRC225 to LRC230 on the southern contact zone, which are drilled at -600 to the south. REO = Total rare earth oxide includes NdPr and is the sum of La2O3, CeO2, Pr6O11, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb4O7, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, Lu2O3, Y2O3. NdPr = neodymium + praseodymium oxide. eoh = intersection to end of hole. Co-ordinate system is WGS84 UTM Zone 33 south, rounded to nearest metre. Assays of 2m composite samples by peroxide fusion and ICP analysis, Nagrom laboratories Perth, Western Australia. Maximum of 2m internal subgrade included.
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Datum: 16.03.2020 - 12:06 Uhr
Sprache: Deutsch
News-ID 609082
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