Discovery Identifies Multiple High-grade Chimneys and Mantos at the San Jose Mine, Puerto Rico Project
August 23 2018 - 7:00AM
Highlights
Discovery Metals Corp. (TSX-V:DSV) (“Discovery” or the “Company”)
is pleased to announce the second and final batch of assay results
from its detailed underground channel sampling program at the San
Jose mine (“San Jose”), one of three historic mines comprising its
flagship Puerto Rico project (“Puerto Rico” or “the Project”) in
northern Coahuila State, Mexico. This follows up on the first batch
of sampling results from San Jose released on July 18, 2018
(results available at www.dsvmetals.com).
Taj Singh, P.Eng, President & CEO, states,
“Puerto Rico is really coming into focus, with two of the three
historic mines now completely mapped and sampled. These new results
from San Jose continue to highlight the very strong and consistent
grades at the Project. The sampling program of the third historic
mine, the Puerto Rico mine, has just wrapped up and we are awaiting
assay results. The focus will now shift to drill-planning and
prioritizing targets for drilling in 2H18. We are also finalizing
plans for an airborne magnetic survey at the Project which will aid
in drill-targeting and will also help to identify high-potential
regional targets surrounding the historic mines’ area.”
Results & Discussion
San Jose contains approximately 630m of
underground drifts and stopes over four levels (from bottom to top:
the Chuyon, Haulage, Rope and Upper levels) that span an
approximate vertical extent of 50m and cover a horizontal extent of
approximately 80m by 80m. All four levels host strongly mineralized
mantos, chimneys and faults. Channel samples were collected at 3-5m
intervals along both sides of the entire length of the developed
workings. The first batch of assay results (71 samples) was
exclusively from the Chuyon level (see news release dated July 18,
2018), while the new results released herein are from the Haulage,
Rope and Upper levels (157 samples). Sampling methodology is
outlined in detail in the Technical Notes section of this release.
Sampling locations and widths were restricted to the extent of
historic workings. The table below highlights assay results of 15
of the most significant individual channels from the new batch of
results sorted by ZnEq (see References section for ZnEq and AgEq
assumptions):
Sample number |
San Jose mine Level |
Width (m) |
Ag (g/t) |
Zn (%) |
Pb (%) |
Cu (%) |
AgEq (g/t) |
ZnEq (%) |
Mineralization type / Host rock |
215523 |
Haulage |
1.2 |
10 |
46.2 |
0.2 |
0.2 |
2,819 |
46.8 |
manto |
215532 |
Rope |
0.4 |
15 |
42.3 |
0.5 |
0.9 |
2,689 |
44.7 |
chimney |
215504 |
Haulage |
0.7 |
154 |
38.2 |
0.6 |
0.1 |
2,493 |
41.4 |
chimney |
215519 |
Haulage |
0.5 |
6 |
37.9 |
0.1 |
0.2 |
2,314 |
38.5 |
manto |
215525 |
Haulage |
0.6 |
9 |
37.3 |
0.3 |
0.3 |
2,305 |
38.3 |
chimney |
215524 |
Haulage |
0.8 |
6 |
37.5 |
0.1 |
0.1 |
2,284 |
37.9 |
chimney |
215509 |
Haulage |
0.7 |
20 |
34.9 |
0.7 |
0.2 |
2,173 |
36.1 |
chimney |
215563 |
Rope |
1.0 |
18 |
30.2 |
0.1 |
2.6 |
2,159 |
35.9 |
manto |
215555 |
Upper |
0.5 |
294 |
14.3 |
16.9 |
1.0 |
1,944 |
32.3 |
fault |
215482 |
Haulage |
0.5 |
8 |
29.5 |
0.3 |
0.1 |
1,802 |
29.9 |
manto |
215547 |
Upper |
1.0 |
445 |
3.5 |
26.30.1 |
0.6 |
1,778 |
29.6 |
chimney |
215546 |
Upper |
1.2 |
47 |
22.9 |
0.5 |
1.9 |
1,668 |
27.7 |
chimney |
215501 |
Haulage |
0.9 |
24 |
26.5 |
0.5 |
0.1 |
1,648 |
27.4 |
chimney |
215549 |
Upper |
1.3 |
61 |
18.1 |
7.1 |
1.2 |
1,578 |
26.2 |
chimney |
215539 |
Rope |
1.3 |
129 |
15.9 |
6.5 |
1.7 |
1,554 |
25.8 |
chimney |
Composite channels, composed of 2-3 contiguous
individual channels were also taken during the program. The three
top composites, sorted based on width x grade, are shown below:
Sample numbers |
San Jose mine Level |
Width (m) |
Ag (g/t) |
Zn (%) |
Pb (%) |
Cu (%) |
AgEq (g/t) |
ZnEq (%) |
Mineralization type / Host rock |
215547-548 |
Upper |
2.3 |
199 |
6.8 |
11.6 |
0.3 |
1,114 |
18.5 |
chimney / fault |
215499-501 |
Haulage |
1.7 |
27 |
24.0 |
0.4 |
0.1 |
1,505 |
24.9 |
chimney |
215550-551 |
Upper |
1.5 |
116 |
5.0 |
10.5 |
0.3 |
873 |
14.5 |
manto / wallrock |
Key findings and interpretations:
- Ag-Pb-Zn-Cu mineralization is present in limestone-hosted
mantos (parallel to bedding) and chimneys and faults (discordant to
bedding). The predominant alteration types occurring at San Jose
include moderate to strong recrystallization of limestone wallrock,
calcite veining, and iron oxide alteration. These mineralized
bodies have undergone surficial oxidation, resulting in a mix of
metal-bearing sulphides and oxides.
- Three mantos, two chimneys and two mineralized faults were
identified. Sampled manto widths range from 0.5-1.5m (restricted by
dimensions of workings) and are open in all directions laterally
(along strike and dip). Based on field observations from the other
historic mines at Puerto Rico, there is potential for additional
stacked mantos below. Sampled chimney widths range up to 2.3m but
field observations suggest the potential for larger widths, as the
main part of a historic stope that mined chimney mineralization had
a width of 5-6m. Both chimneys are open along strike and to depth.
Mineralized faults widths range from 0.4-1.4m, and are open along
strike and to depth.
- The average grades of the chimneys, mantos and mineralized
faults at San Jose is shown below:
Mineralization |
samples (#) |
Ag (g/t) |
Zn (%) |
Pb (%) |
Cu (%) |
ZnEq (%) |
Manto 1 |
2 |
141 |
8.0 |
11.1 |
0.2 |
18.1 |
Manto 2 |
16 |
19 |
13.6 |
1.1 |
0.3 |
15.2 |
Manto 3 |
14 |
229 |
17.6 |
9.3 |
0.3 |
28.2 |
Chimney 1 |
20 |
54 |
10.8 |
2.2 |
0.5 |
14.3 |
Chimney 2 |
20 |
57 |
13.9 |
3.1 |
0.5 |
17.8 |
Minz. Fault 1 |
23 |
53 |
4.0 |
5.3 |
0.7 |
9.9 |
Minz. Fault 2 |
20 |
10 |
2.2 |
0.4 |
0.1 |
2.7 |
- In addition, the wallrock of the workings at San Jose carried
significant mineralization. Average wallrock grades from all four
levels were 5.2%, 0.5%, 3.1% and 3.2% ZnEq respectively.
- Cu values were consistently significant, indicating potential
proximity to an intrusive source. The highest values of Cu were
hosted within chimneys and faults.
ABOUT DISCOVERY METALS
Discovery Metals is focused on discovering and
advancing high grade polymetallic deposits in a recently assembled
land package of approximately 300,000 hectares over a large and
historic mining district in northern Coahuila State, Mexico. The
portfolio of seven key properties, all with shallow high-grade
silver-zinc-lead mineralization, is situated in a world class CRD
belt that stretches from southeast Arizona to central Mexico. The
land holdings contain numerous historical direct-ship ore workings
with approximately 4km of underground development. No modern
exploration or exploration drill testing has been carried out on
the properties prior to Discovery’s time on the projects.
For further information contact: Andreas L'AbbéChief
Financial Officer416-613-9410
Discovery Metals Corp.#701 - 55 University AveToronto, ON Canada
M5J 2H7info@dsvmetals.com
On Behalf of the Board of Directors“Taj Singh”
Taj Singh, M.Eng, P.Eng, CPA President, Chief
Executive Officer, and Director
REFERENCES
For a full table of results, maps and graphics related to this
news release, please refer to:
https://dsvmetals.com/site/assets/files/5187/appendix-sj-2-final.pdf
All numbers in this news release are rounded and
assays are uncut and undilute. ZnEq and AgEq calculations are based
on USD $17/oz Ag, $1.50/lb Zn, $1.00/lb Pb, $3.00/lb Cu and do not
consider metallurgical recovery.
TECHNICAL NOTES
Sample
analysis and QA/QC
Program: The rock chip and channel samples were taken
perpendicular to mineralization, with variable length (across width
of mineralization, typically 0.5m-2.5m) and a minimum channel
thickness of 60mm and minimum channel depth of 30mm. The entire
volume of each chip or channel sample was transported from site by
ALS and prepared at the ALS lab facilities in Zacatecas and
Chihuahua facilities, with splits of pulps shipped to the ALS lab
in Vancouver for analysis. Samples were analyzed for gold using (1)
a standard fire assay with a 30-gram pulp and Atomic Absorption
(AA) finish for gold; and (2) Thirty-element inductively coupled
plasma atomic emission spectrometry (“ICP-AES”). Over limit sample
values were re-assayed for: (1) values of zinc > 10%; (2) values
of lead > 10%; and (3) values of silver > 100 g/t. Samples
were re-assayed using the ME-OG62 (high-grade material ICP-AES)
analytical package. For values of zinc or lead greater than 30%, a
third re-assay using the Zn-VOL50 or Pb-VOL50 (potentiometric
titration) analytical method was used while values of silver
greater than 1,500 g/t, were re-assayed using the Ag-CON01
analytical method, a standard fire assay with 30g pulp and
gravimetric finish. Certified standards and blanks were routinely
inserted into all sample shipments to ensure integrity of the assay
process.
Qualified
Person: Taj Singh, M.Eng, P.Eng, President and
CEO, Discovery Metals Corp., is the Company's designated Qualified
Person for this news release within the meaning of National
Instrument 43-101 Standards of Disclosure for Mineral Projects (“NI
43-101”) and has reviewed and validated that the information
contained in this news release is accurate.
Neither TSX Venture Exchange nor its Regulation
Services Provider (as that term is defined in policies of the TSX
Venture Exchange) accepts responsibility for the adequacy or
accuracy of this release.
Cautionary Note Regarding
Forward-Looking Statements This news release may include
forward-looking statements that are subject to inherent risks and
uncertainties. All statements within this news release, other than
statements of historical fact, are to be considered forward
looking. Although the Company believes the expectations expressed
in such forward-looking statements are based on reasonable
assumptions, such statements are not guarantees of future
performance and actual results or developments may differ
materially from those described in forward-looking statements.
Factors that could cause actual results to differ materially from
those described in forward-looking statements include fluctuations
in market prices, including metal prices, continued availability of
capital and financing, delays in receipt of required permits, and
general economic, market or business conditions. There can be no
assurances that such statements will prove accurate and, therefore,
readers are advised to rely on their own evaluation of such
uncertainties. We do not assume any obligation to update any
forward-looking statements except as required under applicable
laws.
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