DLP Reports results from its initial Metallurgical Study on its Aurora Property, Peru. High recoveries achieved (95.8% Cu, 86.4% Mo, 89.3% Ag) to saleable concentrates.
DLP Reports results from its initial Metallurgical Study on its Aurora Property, Peru.
High recoveries achieved (95.8% Cu, 86.4% Mo, 89.3% Ag) to saleable concentrates.
Cranbrook, British Columbia, (Newsfile Corp. – August 29, 2024) DLP Resources Inc. (“DLP” or
the “Company”) (TSXV:DLP) (OTCQB:DLPRF) is pleased to report results from the initial
metallurgical scoping study on its Aurora Project in southern Peru. The Company commissioned C.H.
Plenge & Cia S.A. ("Plenge") in Lima, Peru to complete test work programs on three composites taken
from the partially leached (M-1), copper enriched/mixed (M-2) and primary Mo-rich (M-3) zones. The
test work reported:
1. Head Assays.
2. Mineralogy.
3. Recovery of copper, silver, and molybdenum by flotation.
4. Copper-Molybdenum separation by flotation.
Highlights are listed below, and detailed results highlighted in Tables 1-11.
Ian Gendall, President & CEO, commented: “Aurora has simple metallurgy that returns high
recoveries of critical minerals, copper and molybdenum from standard flotation processes into high-
grade concentrates free of deleterious elements. This first phase of metallurgical test work has
confirmed high recoveries of copper (95.8%), molybdenum (86.4%) and silver (89.3%) in the rougher
concentrate from the composite of partially leached, enriched/mixed and primary mineralized
zones. These excellent recoveries for copper, molybdenum and silver at a time when molybdenum
prices are at $30/lb, copper at $4.20/lb and silver at $29/oz, bode well for the economics of the
project moving forward.”
Highlights
1. The major copper mineral is chalcopyrite followed by chalcocite while molybdenum is
molybdenite. The main gangue is quartz followed by orthoclase and muscovite. Pyrite is the
main sulphide gangue.
2. High recoveries for copper (“Cu”), molybdenum (“Mo”) and silver (“Ag”) in the rougher
concentrate from the composite created from the partially leached (M1), copper enriched
(M2) and primary Mo-rich (M3) zones were 95.8%, 86.4% and 89.3%, respectively. The
primary grind was 150 microns and concentrate regrind of 20 to 44 microns.
3. The best conditions for maximum molybdenum, copper and silver recovery were determined
and verified by Run 32-C with pH of 9.5, a primary grind of P80-133 microns using collectors
consisting of - Xanthate SIBX (Z-14) 27 g/ t, A-208 11 g/ t, F. Oil 10g/ t, frother MIBC 17 g/t and
a flotation time of 12 min. This gave recoveries of Ag-71.6%, Cu-97.4% and Mo-92.4%.
4. Copper molybdenum separation was successfully tested on a copper molybdenum
concentrate obtained from a large, locked test .
5. A commercial grade molybdenum concentrate was floated for composite M-1 and assayed
52.6% molybdenum at 61% recovery. Similarly, for composite M-3 the concentrate assayed
49.7% molybdenum at 84% recovery from the feed. In both cases NaSH was used as
depressant and the separation stages limited to four because of mass restric tions. Copper
molybdenum separation was not tested for composite M -2. Additional testing for M -2
extending the cleaner flotation time to accommodate the slow floating molybdenum was
recommended by Plenge
6. The projected metallurgical balances from lock cycle testing (“LCT”) for M-1 and M-2 were as
follows:
a. Composite M -1 (partial leached zone) gave a bulk concentrate assaying 153g/ t
silver,17.7% copper and 3.8% molybdenum with recoveries of 53.3%, 81.8% and
62.4%, respectively.
b. Composite M-3 (Primary Mo-rich) the bulk concentrate assayed 57.7 g/ t silver, 7.5 %
copper and 28% molybdenum with recoveries of 61%, 85.6% and 89.8%,
respectively. The low copper grade is due to the high molybdenum grade and
recovery.
7. The average recovery to the bulk concentrate from the composite consisting of all three test
composites, M-1 (partial leached zone), M-2 (enriched/mixed copper zone) and M-3 (primary
Mo-rich zone) for silver, copper and molybdenum were 60.8%, 83.2% and 67.6%,
respectively. The concentrate grades range from 17.7% to 29.5% copper and molybdenum
from 1.5% to 28.0%.
8. For the master composite (M -1+M-2+M-3) roughly 70% of the value is represented by
molybdenum, 27% by copper and 3% by silver therefore it may be considered a molybdenum
ore.
9. No significant penalty or deleterious elements were found for both copper and molybdenum
concentrate.
10. Further improvements in grade and recovery are foreseeable with further testing.
Metallurgical Scoping Study Summary
The metallurgical test work program at C.H. Plenge & Cia S.A. ("Plenge") in Lima, Peru included
studies on three composite samples sent to the Plenge Laboratory Lima offices by DLP on October
25, 2023. The three composite samples were taken from ¼ diamond drill core and included, M-1
(~161kg), M-2 (~15 5kg) and M -3 (~149kg). These composite samples were taken from 7 drillholes
totaling ~465kg and represented the following intervals:
1. M-1: Partial leached zone in mineralized porphyry from 24 to 121m,
2. M-2: Cu enriched/mixed zone in mineralized porphyry between 111 and 363m and,
3. M-3: Primary Mo-rich zone in mineralized porphyry from 478 to 988m.
The samples were selected from the Aurora porphyry copper -molybdenum-silver deposit to
represent the mineralization, metal grades and lithology type for the initial metallurgical test work.
The test works main objective, was to obtain the following information on the three composite
samples M-1, M-2 and M-3 and the master composite of all three.
1. Head Assays.
2. Mineralogy.
3. Recovery of Copper, Silver, and Molybdenum by flotation.
4. Copper Molybdenum Separation by flotation.
Sample Selection
The metallurgical samples were taken from seven of the thirteen drill holes drilled in 2013 and are
listed in Tables 1 and 2 below. The samples were selected to represent the mineralization, metal
grades and lithology type for the initial metallurgical test work.
Table 1. Sample intervals for composites M -1 (Partially leached mineralized porphyry) and M -2
(enriched/mixed mineralized porphyry).
M-1 - Partially Leached
(Mineralized Porphyry)
M-2 – Enriched/Mixed
(Mineralized Porphyry)
SAMPLE
ID Hole ID
From
(m)
To
(m)
Interval
(m)
SAMPLE
ID Hole ID
From
(m)
To
(m)
Interval
(m)
Y330866 A23-004 28.00 30.00 2.00 Y330909 A23-004 110.90 113.00 2.10
Y330869 A23-004 34.00 36.00 2.00 Y330912 A23-004 115.00 117.50 2.50
Y330870 A23-004 36.00 38.00 2.00 Y330924 A23-004 140.00 142.00 2.00
Y330873 A23-004 40.00 42.00 2.00 Y330927 A23-004 146.00 148.00 2.00
Y330875 A23-004 44.00 46.00 2.00 Y330933 A23-004 156.00 158.00 2.00
Y330877 A23-004 48.00 50.00 2.00 Y330934 A23-004 158.00 160.00 2.00
Y330878 A23-004 50.00 52.00 2.00 Y330936 A23-004 162.00 164.00 2.00
Y330879 A23-004 52.00 54.00 2.00 Y330937 A23-004 164.00 166.00 2.00
Y330880 A23-004 54.00 56.00 2.00 Y330961 A23-004 210.00 212.00 2.00
Y330884 A23-004 62.00 64.00 2.00 Y330967 A23-004 222.00 224.00 2.00
Y330887 A23-004 68.00 70.00 2.00 Y330969 A23-004 226.00 228.00 2.00
Y330889 A23-004 72.00 74.00 2.00 Y330973 A23-004 232.00 234.00 2.00
Y330892 A23-004 76.00 78.00 2.00 Y330974 A23-004 234.00 236.00 2.00
Y330896 A23-004 84.00 86.00 2.00 Y330978 A23-004 242.00 244.00 2.00
Y330900 A23-004 92.00 94.00 2.00 Y330979 A23-004 244.00 246.00 2.00
Y330907 A23-004 106.00 108.50 2.50 Y330980 A23-004 246.00 248.00 2.00
Y331230 A23-005 24.00 26.00 2.00 Y330981 A23-004 248.00 250.00 2.00
Y331232 A23-005 28.00 30.00 2.00 Y330985 A23-004 256.00 258.00 2.00
Y331234 A23-005 32.00 34.00 2.00 Y330986 A23-004 258.00 260.00 2.00
Y331235 A23-005 34.00 36.00 2.00 Y330987 A23-004 260.00 262.00 2.00
Y331238 A23-005 38.00 40.00 2.00 Y331294 A23-005 146.00 148.00 2.00
Y331239 A23-005 40.00 42.00 2.00 Y331295 A23-005 148.00 150.00 2.00
Y331243 A23-005 48.00 50.00 2.00 Y331296 A23-005 150.00 152.00 2.00
Y331250 A23-005 62.00 64.00 2.00 Y331301 A23-005 158.00 160.00 2.00
Table 1 cont. M-1 - Partially Leached
(Mineralized Porphyry)
Table 1 cont. M-2 – Enriched/Mixed
(Mineralized Porphyry)
SAMPLE
ID Hole ID
From
(m)
To
(m)
Interval
(m)
SAMPLE
ID Hole ID
From
(m)
To
(m)
Interval
(m)
Y331251 A23-005 64.00 66.00 2.00 Y331302 A23-005 160.00 162.00 2.00
Y331252 A23-005 66.00 68.00 2.00 Y331303 A23-005 162.00 164.00 2.00
Y331269 A23-005 98.00 100.00 2.00 Y331304 A23-005 164.00 166.00 2.00
Y331270 A23-005 100.00 102.00 2.00 Y331313 A23-005 182.00 184.00 2.00
Y331274 A23-005 108.00 110.00 2.00 Y331618 A23-006 91.00 93.00 2.00
Y331593 A23-006 38.00 40.00 2.00 Y331623 A23-006 99.00 101.00 2.00
Y331595 A23-006 42.00 45.00 3.00 Y331636 A23-006 125.00 127.00 2.00
Y331596 A23-006 45.00 47.00 2.00 Y331639 A23-006 131.00 133.00 2.00
Y331597 A23-006 47.00 49.00 2.00 Y331671 A23-006 191.00 193.00 2.00
Y331598 A23-006 49.00 51.00 2.00 Y331675 A23-006 199.00 201.00 2.00
Y331603 A23-006 58.00 60.00 2.00 Y331693 A23-006 231.00 233.00 2.00
Y331607 A23-006 69.00 71.00 2.00 Y332488 A23-008 343.00 345.00 2.00
Y331610 A23-006 75.00 77.00 2.00 Y332492 A23-008 351.00 353.00 2.00
Y331611 A23-006 77.00 79.00 2.00 Y332846 A23-009 325.00 327.00 2.00
Y331621 A23-006 95.00 97.00 2.00
Y331633 A23-006 119.00 121.00 2.00
Total Metres 81.50 Total Metres 76.60
Table 2. Sample intervals for composite M3 (primary – hypogene mineralized porphyry).
M3 – Primary/Hypogene
(Mineralized Porphyry)
SAMPLE ID Hole ID
From
(m)
To
(m)
Interval
(m)
Y331111 A23-004 497.00 499.00 2.00
Y331112 A23-004 499.00 502.00 3.00
Y331117 A23-004 510.00 512.00 2.00
Y331118 A23-004 512.00 514.00 2.00
Y331123 A23-004 520.00 522.00 2.00
Y331468 A23-005 478.00 480.00 2.00
Y331469 A23-005 480.00 482.00 2.00
Y331470 A23-005 482.00 484.00 2.00
Y331477 A23-005 496.00 498.00 2.00
Y331478 A23-005 498.00 500.00 2.00
Y331830 A23-006 500.00 502.00 2.00
Y331833 A23-006 506.00 508.00 2.00
Y331836 A23-006 512.00 514.00 2.00
Y331848 A23-006 534.00 536.00 2.00
Table 2 cont. M3 – Primary/Hypogene
(Mineralized Porphyry)
SAMPLE ID Hole ID From
(m)
To
(m)
Interval
(m)
Y331849 A23-006 536.00 538.00 2.00
Y332559 A23-008 480.00 482.00 2.00
Y332561 A23-008 482.00 484.00 2.00
Y332609 A23-008 574.00 576.00 2.00
Y332612 A23-008 580.00 582.00 2.00
Y332636 A23-008 626.00 628.00 2.00
Y332649 A23-008 650.00 652.00 2.00
Y332672 A23-008 694.00 696.00 2.00
Y333505 A23-010 789.00 791.00 2.00
Y333506 A23-010 791.00 793.00 2.00
Y333508 A23-010 795.00 797.00 2.00
Y333509 A23-010 797.00 799.00 2.00
Y333513 A23-010 803.00 805.00 2.00
Y333514 A23-010 805.00 807.00 2.00
Y333515 A23-010 807.00 809.00 2.00
Y333517 A23-010 811.00 813.00 2.00
Y333520 A23-010 817.00 819.00 2.00
Y333524 A23-010 825.00 827.50 2.50
Y333528 A23-010 835.00 837.50 2.50
Y333596 A23-010 964.00 966.00 2.00
Y333597 A23-010 966.00 968.00 2.00
Y333602 A23-010 976.00 978.00 2.00
Y333605 A23-010 982.00 984.00 2.00
Y333607 A23-010 986.00 988.00 2.00
Y333994 A23-011 726.00 728.00 2.00
Y334008 A23-011 752.00 754.00 2.00
Y334017 A23-011 768.00 770.00 2.00
Y334025 A23-011 784.00 786.00 2.00
Y334035 A23-011 804.00 806.00 2.00
Y334048 A23-011 828.00 830.00 2.00
Y334072 A23-011 874.00 876.00 2.00
Y334102 A23-011 930.00 932.00 2.00
Y334114 A23-011 954.00 956.00 2.00
Total Metres 102.00
Table 3: Diamond drill holes used for the Initial Metallurgical Test Work.
Hole Easting Northing Elevation Length Azimuth Inclination
ID m m m m Degrees Degrees
A23-004 189,793 8,566,268 2638 700.90 140 -70
A23-005 189,740 8,566,258 2628 693.4 140 -70
A23-006 189,612 8,566,230 2628 708.55 140 -70
A23-008 189,631 8,566,045 2722 703.65 120 -70
A23-009 190,135 8,565,722 2966 790.55 340 -70
A23-010 190,079 8,565,708 2965 1002.55 340 -70
A23-011 189,970 8,565,440 2760 1081.70 025 -70
Notes to Table 3: The coordinates are in WGS84 and 19S Datum.
Figure 1. DLP Project areas in Peru with Aurora Project Shown.
Figure 2. Metallurgical drill holes shown with grey circle with red outline.
The head grades for each composite M1, M2 and M3 and the combined master composite are
shown in Table 4 below.
Table 4. Head Grade of Composites M-1-Partially leached, M-2-Enriched/Mixed and M-3-Primary
Mo-rich and Master Composite.
The three composites represent copper molybdenum ore whose average head grade is silver 3.5
g/t, copper 0.30% and molybdenum 0.10%.