LUCA Drills 37 Metres of 6 G/T GOLD, 370 G/T Silver and 6% Zinc at Campo Morado
Luca Mining Corp.
Suite 410, 1111 Melville Street
Vancouver, BC, V6E 3V6, Canada
NEWS RELEASE
LUCA DRILLS 37 METRES OF 6 G/T GOLD, 370 G/T SILVER AND 6% ZINC AT CAMPO MORADO
Vancouver, B.C., August 27, 2005: Luca Mining Corp. (“Luca” or the “Company”) (TSX-V: LUCA; OTCQX:
LUCMF; Frankfurt: Z68) is pleased to announce analytical results from the next six (6) surface drillholes at
the Reforma Deposit and the next five (5) underground drillholes of the 5,000 metre (“m”) underground
and 2,500m surface Phase One exploration drill program at the Campo Morado Polymetallic VMS mine in
Guerrero State, Mexico.
• Luca has begun to unlock the gold potential at Campo Morado with consistent high -grade gold
intercepts from both the Reforma Deposit and in areas immediately adjacent to underground
operations
• Surface drillhole CMRF25-07 intercepts 37.2m of 13.85 AuEq** (5.87 g/t gold, 367.50 g/t silver,
0.53% copper, 5.54% zinc and 2.57% lead ) including 6.2m of 43.77 g/t AuEq (20.81 g/t gold,
1,484.20 g/t silver, 0.82% copper, 5.98% zinc and 4.58% lead)
• Underground drillhole CMUG-25-022 returns assays including 5.5 m of 15.2/t AuEq (5.5m of 3.20
g/t gold, 252.6 g/t silver, 2.19% copper, 12.79% zinc and 5.10% lead) from an unmined area within
20 metres of current underground workings
• 24 underground drillholes totalling 5,070m completed as part of the 5,000m Phase 1 program
targeting near-mine resource expansion and exploration of untested areas of the Campo Morado
Mine. Phase 2 program designed to follow up on positive results and test additional priority
targets to begin shortly
• Surface drilling continues at Reforma and El Rey with ten drillholes completed at the Reforma
Deposit
Surface drillholes CMRF-25-02 through CMRF-25-07 were all collared within the Reforma Deposit, and
intersected appreciable intervals of massive sulphide mineralization including:
• 6.2m of 43.77 g/t AuEq (20.81 g/t gold, 1,484.20 g/t silver, 0.82% copper, 5.98% zinc and
4.58% lead from 237.0m within a broader interval of 37.2m of 13.85 AuEq (5.87 g/t gold,
367.50 g/t silver, 0.53% copper, 5.54% zinc and 2.57% lead) from 211.2m in hole CMRF25-07
• 9.9m of 28.32 AuEq (11.61 g/t Au, 783.90 g/t Ag, 3.51% Cu, 4.56% Zn and 2.91% Pb from
218.6m within a broader interval of 39.0m of 10.05 AuEq (4.09 g/t gold, 3 04.90 g/t silver,
0.96% copper, 1.27% zinc and 1.74% lead) from 191.6m in hole CMRF25-06
• 5.0m of 9.13 g/t AuEq (3.56 g/t gold, 196.28 g/t silver, 0.70% copper, 4.43% zinc and 2.24%
lead) from 285.5m in hole CMRF25-03
• 3.9m of 19.78 AuEq (11.23 g/t gold, 342.28 g/t silver, 0.36% copper, 3.95% zinc and 7.55%
lead) from 273.8m within a larger 7.45m of 12.59 AuEq (6.91 g/t gold, 228.06 g/t silver, 0.37%
copper, 2.29% zinc and 4.75% lead) in hole CMRF25-02
These surface holes were drilled across the Reforma Deposit to confirm the size, tenor and grade of
precious and base metal s historically reported as well as to better define the deposit and test the
expansion potential of the Reforma massive sulphide mineralization. Of note is the fact that these holes
have returned grades equal to or exceeding historically reported intervals and importantly over larger
widths than the geologic model predicted (See Table 1).
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Underground drillholes CMUG-25-17 confirmed mineralization close to the 856 Zone of the Southwest
Zone while CMUG-25-19 through CMUG-25-21 confirmed continuity of mineralization between the Largo
Zone and anomalous mineralization to the west identified from historical drilling. Drillhole CMUG-25-22
confirmed t he extension potential of the Bajo zone mineralization, intersect ing mineralization above
mine cutoff grades, including 5.5 m of 15.2/t AuEq (5.5m of 3.20 g/t gold, 252.6 g/t silver, 2.19% copper,
5.10% zinc and 12.79% lead) from 158.0m (downhole) in an unmined area within 20 metres of current
underground workings (See Table 1). Figure 1 presents the location of the drillholes, and Table 2 provides
drill collar details.
Campo Morado hosts several polymetallic massive sulphide deposits containing gold, silver, copper, zinc,
and lead within a highly prospective land package totaling over 121 square kilometres within the Sierra
Madre del Sur mineralized belt. This year’s und erground exploration campaign represents the first
substantive exploration the project and mine has seen since 2014.
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Paul D. Gray, Luca´s VP of Exploration, commented, "The results from Luca’s first drill programs at Campo
Morado have exceeded expectations for both drill programs – successfully advancing Luca’s objective to
demonstrate the high-grade gold exploration and growth potential of Campo Morado . These wide,
consistent, high-grade precious metals drill intercepts, with strong associated base metals, are beginning
to demonstrate the exceptional gold and silver potential at Campo Morado, which was not a focus for
previous operators of the mine. In addition, current Reforma drilling has returned core recoveries which
far exceed those achieved in historic al drilling programs, an important improvement that is expected to
inform a more accurate representation of the Deposit. We anticipate continued exploration success will
further unlock the Project’s full potential. A Phase 2 surface drilling program targeting additional high-
grade gold is anticipated to begin shortly , while underground and near-mine and exploration efforts will
continue to expand mineralization proximal to current mining operations.”
Table 1: Highlighted Diamond Drill Assay Results from UG Drillholes CMUG-25-17, CMUG-25-19 through
CMUG-25-22 and Surface Drillholes CMRF-25-through CMRF-25-07.
Hole ID From (m) To (m) Interval* (m) Au g/t Ag g/t Cu% Pb% Zn% AuEq**
Logged
Recovery
(%)
CMUG25-017 9.3 10.3 1.0 0.62 158.00 2.75 1.00 3.85 7.79 >90%
CMUG-25-019
232.3 248.7 16.4 0.62 45.95 0.34 0.31 0.97 2.06 >90%
Including
232.3 242.9 10.6 0.74 52.85 0.38 0.37 1.08 2.38 >90%
CMUG-25-020
231.6 238.5 7.0 0.73 52.56 0.36 0.24 0.92 2.23 >90%
Including
235.5 238.5 3.0 0.91 63.30 0.50 0.24 1.22 2.85 >90%
CMUG25-021
329.3 330.9 1.6 1.23 36.60 0.07 0.53 0.02 1.93 >90%
340.3 344.4 4.2 0.59 34.17 0.42 0.18 0.53 1.79 >90%
379.1 380.2 1.0 0.59 38.20 0.44 0.23 0.02 1.70 >90%
CMUG25-022
151.5 178.9 27.4 1.15 91.21 0.78 1.36 4.27 5.22 >90%
Including
158.0 174.7 16.6 1.51 131.40 1.14 2.14 6.55 7.58 >90%
Including
158.0 163.6 5.5 3.20 252.59 2.19 5.10 12.79 15.22 >90%
181.9 210.1 28.3 0.15 13.13 0.25 0.14 1.89 1.36 >90%
Including
187.5 205.5 18.0 0.15 15.51 0.31 0.15 2.41 1.65 >90%
238.5 259.5 21.0 0.08 11.03 0.38 0.14 2.00 1.47 >90%
Including
246.5 256.5 10.1 0.10 16.98 0.64 0.16 3.41 2.42 >90%
CMRF25-02 271.5 278.9 7.5 6.91 228.06 0.37 2.29 4.75 12.59 99
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Including
273.8 277.7 3.9 11.23 342.28 0.36 3.95 7.55 19.78 98
CMRF25-03
284.6 293.1 8.5 2.38 138.52 0.69 1.43 2.93 6.45 98
Including
285.5 293.1 7.6 2.65 146.76 0.59 1.59 3.24 6.85 97
Including
285.5 290.5 5.0 3.56 196.28 0.70 2.24 4.43 9.13 98
CMRF25-04
131.2 132.6 1.4 3.89 277.00 0.36 6.90 23.55 18.29 74
132.6 167.6 35.0 Very Low Core Recovery 7-21%
167.8 170.8 3.0 0.13 328.00 0.08 0.37 0.07 4.44 33
CMRF25-05
134.4 193.4 59.0 0.78 44.30 0.88 0.30 1.67 3.15 97
Including
134.4 155.5 21.1 0.72 32.89 1.30 0.06 0.49 2.99 93
Including
134.4 147.3 12.9 0.87 39.75 1.43 0.06 0.57 3.42 91
Including
134.4 143.5 9.1 0.93 45.29 1.71 0.08 0.68 3.95 99
and
163.6 171.4 7.9 0.08 19.70 0.55 0.08 2.11 1.82 100
and
171.4 193.4 22.0 1.34 74.71 0.59 0.71 3.14 4.37 100
Including
173.5 180.7 7.2 2.12 100.40 0.53 0.97 4.22 5.85 99
and
184.7 190.7 6.0 1.41 77.47 0.59 0.91 2.74 4.38 100
CMRF25-06
173.2 181.5 8.3 0.18 27.80 0.70 0.07 1.08 1.83 76
Including
173.2 179.0 5.8 0.24 34.70 0.83 0.09 1.28 2.23 75
Including
173.2 176.8 3.2 0.34 48.20 1.05 0.13 1.34 2.81 77
191.6 230.6 39.0 4.09 304.90 0.96 1.74 1.27 10.05 44
Including
191.6 195.6 4.0 4.48 141.00 0.08 3.16 0.15 7.26 41
and
197.6 216.8 19.2 1.28 181.20 0.10 1.34 0.13 4.08 17
and
218.6 228.5 9.9 11.61 783.90 3.51 2.91 4.56 28.32 100
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and
230.0 230.6 0.5 2.33 101.30 0.18 0.81 1.74 4.68 100
CMRF25-07
185.4 250.1 64.7 3.41 224.30 0.48 1.61 4.29 8.82 95
Including
185.4 211.2 25.9 0.09 30.30 0.43 0.32 2.70 2.09 100
Including
185.4 198.3 13.0 0.10 22.60 0.48 0.18 1.00 1.41 100
and
198.3 211.2 12.9 0.09 38.00 0.39 0.46 4.41 2.80 100
and
211.2 248.4 37.2 5.87 367.50 0.53 2.57 5.54 13.85 91
Including
232.7 248.4 15.7 12.41 777.10 0.65 3.40 5.83 25.97 97
Including
237.0 243.2 6.2 20.81 1,484.20 0.82 4.58 5.98 43.77 93
*True widths are estimated to be >90% of drilled intervals.
** AuEq equation is: AuEq = Au + (Ag*0.0124) + (Cu%*1.2787) + (Pb%*0.2740) + (Zn%*0.3653), at $2,250 US$/oz Au, 28 US$/oz Ag, 4.20 US$/lb
Cu, 0.90 US$/lb Pb and 1.20 US$/lb Zn, respectively.
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To date, 24 underground diamond drillholes are complete totaling 5,070 metres with “HQ” and/or “NQ”
sized diamond drill core at the Campo Morado mine. These underground drillholes are part of the Phase
1 underground exploration campaign which is focused on definition o f mineable resources near existing
mine working as well as testing new zones interpreted to host extensions of known mineralization based
on the Property´s extensive historical drilling database.
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In addition, 2,500m are complete at the Reforma Deposit in ten surface drillholes with “HQ” and/or “PQ”
sized diamond drill core. These surface drillholes represent the Phase 1 2,500m surface drilling campaign
at the Reforma and El Rey Deposits , designed to confirm and expan d the existing mineral resources at
both sites as well as to collect material for additional metallurgical test work, all with the objective of
adding the Reforma and El Rey deposits into an improved Campo Morado mine plan. Based on the
strength of the results from surface drilling to date a Phase 2 program has been planned and is anticipated
to begin shortly.
Table 2: Underground and Surface Drill Collar Details for Released Results
UTM WGS84
Hole ID Easting Northing Elevation
(m) Azimuth Dip Depth (m)
CMUG-25-017 378604 2011338 891 014 12 179
CMUG-25-019 379152 2011575 1,064 279 -34 290
CMUG-25-020 379152 2011575 1,064 280 -25 297
CMUG-25-021 379160 2011575 1,064 151 -42 396
CMUG-25-022 379159 2011568 1,064 150 -71 282
CMRF-25-02 380103 2013316 1,585 044 -65 308
CMRF-25-03 380141 2013196 1,576 049 -70 320
CMRF-25-04 380221 2013304 1,557 046 -47 200
CMRF-25-05 380223 2013300 1,557 020 -50 223
CMRF-25-06 380247 2013179 1,524 040 -55 262
CMRF-25-07 380247 2013179 1,524 047 -63 280
About 2025 Campo Morado Surface Exploration Program
Luca’s inaugural surface drill program is running in parallel with the ongoing underground exploration
program a t Campo Morado. The Phase 1 program includes 2,500m of diamond drilling focused on
definition and expansion the Reforma and El Rey Deposits located approximately one kilometer north and
east of the main Campo Morado m ine, where drilling efforts continue. These deposits host mineral
resources (see Company News Release of April 8, 2025) which have not been assessed in any way in over
14 years.
Thirty-eight ( 38) priority targets have been identified from assessment of the substantive historic al
exploration database of Campo Morado and ranked , based on coincident favourable geological,
geochemical and geophysical interpretations. Several of these targets, including Reforma and El Rey, have
seen historic al exploration, including diamond drilling; however, the majority remain undrilled.
Considering the fertile geologic settling of the large Campo Morado concessions and the camp’s prolific
discovery history, each of these targets has the potential to host significant VMS mineralization. Luca
intends to prioritize and systematically explore the larger Campo Morado concession package in the
coming months.