TORONTO, July 15, 2019 /CNW/ - Golden Star Resources Ltd.
(NYSE American: GSS; TSX: GSC; GSE: GSR) ("Golden Star" or the
"Company") is pleased to announce that it has intersected
significant gold mineralization 200 metres ("m") down plunge to the
south of the Inferred Mineral Resource at the Wassa Underground
Gold Mine ("Wassa") in Ghana,
demonstrating the extension of the deposit. Drilling 85 km to the
south at the Father Brown deposit has also shown that the Adoikrom
gold bearing structure extends over 200
m down plunge of the last drill hole.
HIGHLIGHTS
- Significant intercepts from Wassa are as follows:
-
- 19.5 m grading 5.4 grams per
tonne ("g/t") of gold ("Au") from 1,227
m in hole
BSDD19-400M
- 29.0 m grading 5.5 g/t of
Au from 423.2 m in hole
BSDD19-388D
- 32.8 m grading 5.3 g/t of
gold Au from 774 m in hole
BSDD19-388D
- 22.7 m grading 8.9 g/t of
Au from 214 m in hole
BSDD19-394D
- 34.6 m grading 7.6 g/t of
gold Au from 83 m in hole
BS18DD-393D
- 17.6 m grading 34.1 g/t of
Au from 447.4 m in hole BS18DD394D1
including 0.3 m grading 1,548 g/t of
Au (30 g/t cap applied 17.6 m grading
4.5 g/t Au)
- 14.3 m grading 6.2 g/t of
gold Au from 283.4 m in hole
BSDD19-396D1
- Significant Intercepts from Father Brown are as follows:
-
- 8.1 m grading 8.7 g/t of
Au from 826.0m in hole
FUGDD19039
- 13.3 m grading 7.2 g/t of
Au from 380.6m in hole
FUGDD19035
- 6.7 m grading 5.6 g/t of
Au from 495.0m in hole
FUGDD19033
Wassa drilling intersected the zone 200
m to the south and has extended the strike of this
underground ore body over 1.7 km, and remains open to the south.
The Company will continue with the Inferred delineation and
conversion drilling at Wassa into the third quarter of the year,
then will be incorporating all of the results, including
underground drilling, to the update of mineral resource and
reserves for 2020 budgeting and year end mineral resource and
reserve statements.
Drilling results at the Father Brown deposits are also
encouraging, with the next steps being to pause the drilling and
update the mineral resource models during the third quarter which,
in turn, will enable the Company's planning engineers to determine
whether there is a viable underground mining project at Father
Brown whether further drilling is warranted. The Company will
update the market later this year.1,2
Notes
|
1.
|
All widths quoted in
this press release are estimated true widths
|
2.
|
Depths of holes
annotated with "D" (daughter hole) are from wedge
|
WASSA SURFACE DRILLNG TESTING FUTURE UNDERGROUND
TARGETS
Drilling results for 27 new surface diamond drill ("DD") holes
totaling 23,271 m have been received
since the 2018 year end resource model update in Q1
20191.
Surface Drilling at Wassa has utilized between 7 to 8 rigs for
most of the year but will be scaling back in the second half of the
year so that the results from the drilling to date can be assessed
and resource models updated. The focus of the drilling this year
has been three-fold, Inferred resource expansion through
200 m step out holes, Inferred
resource definition drilling on 100 m
infill fences and Inferred to Indicated resource conversion
drilling on approximately 50 m drill
spacing.
The image below shows the significant results drilled which have
not been included in the 2018 year end resource estimates.
Notes
|
1.
|
All widths quoted in
this diagram are true widths
|
2.
|
The estimated true
width of this intercept has been updated based on the latest
drilling results
|
Further sections showing the location of the drill holes are
available at: http://www.gsr.com/operations/wassa/wassa-main
Wassa Underground Step Out Drilling Results
The Wassa step out drilling continued with three additional
holes being drilled on a 200 m step
out drill fence south of the existing Inferred Mineral Resource,
18500 North. The initial hole was drilled from west to east at a
steep angle and did not intersect the projected zone. The oriented
core was assessed in this hole and it was concluded that the main
structural trend had changed from west dipping to steep east
dipping so the drill hole orientation was switched 180 degrees
drilling east to west.
Hole BSDD19-400M, which was
oriented in the east to west orientation intersected a single zone
returning a width of 19.5 m grading
5.4 g/t gold1. A second daughter hole was also drilled
on 18500N and intersected the mineralized zone approximately 90 me
up dip of this zone, results are pending.
The results of these holes demonstrate that the high grade
mineralization continues 200 m south
of the known mineralization and will have a positive effect on the
next resource update, increasing the Inferred Mineral Resource in
this area. This phase of the step out drilling has now been
completed and has demonstrated the zone continues to the south and
remains open up and down dip.
Wassa Underground Inferred Mineral Resource Extension
Drilling
The Wassa Inferred Mineral Resource extension drilling is
ongoing and has generally focused on the deeper mineralization
below 1,000 m from surface. Results
received so far have confirmed the high grade mineralized zone but
the dip of the zone will need to be adjusted at depth.
Two holes were drilled on fence 18700 N, one was successful in
extending the mineralized zone approximately 130 m down dip, BS18DD392D3 which intersected
22.4 m grading 2.5 g/t) while the
second hole was terminated early due to down the hole issues.
Results have been received for one infill hole on the next fence
to the North on 18900N. BSDD19-388D3 intersected two zones,
25.2 m grading 3.3 g/t and
29 m grading 5.5 g/t, approximately
50 m up dip of a high grade hanging
wall zone previously intersected in BS18DD388M, 58.5 m grading 4.8 g/t1. A second
deeper zone was also intersected in this hole, 32.8 m grading 5.7 g/t, which is approximately
100 m up dip of the zones intersected
previously in hole BS18DD388D2, 27.1m
grading 4.7 g/t, 66.8m grading 5.3
g/t, 40.7 m grading 4.8
g/t2. The results of this new hole have confirmed the
wider zones of high grade mineralization at depth are present but
there are still questions about the geometry of these zones.
Further drilling on 100 m infill
sections is ongoing and additional holes have been planned in order
to help define the geometry of this deeper zone of
mineralization.
Section 19000N saw three daughter holes drilled after the 2018
year end mineral resource model update. This drilling tested both
the Inferred B Shoot mineralization, hanging wall mineralization
and the F Shoot at depth. BSDD19-394D3 intersected several zones
including B Shoot mineralization of 4.5
m grading 5.0 g/t and 6.8 m
grading 7.9 g/t. This hole also intersected 15.9 m grading 4.5 g/t and can be correlated with
the 29 m grading 5.5 g/t drilled in
hole BSDD19-388D3 on section 18900N. BSDD19-394D3 also drilled the
deeper F Shoot Mineralization but assays for the bottom of this
hole are pending. BSDD19-394D2 intersected the B Shoot horizon
cutting 22.7 m grading 8.9 g/t.
Mineralization in the footwall of B Shoot was intersected in
BS18DD394D1 with 17.6 m grading 34.1
g/t being drilling including a narrow intercept of 0.3 m grading 1,548 g/t. This foot wall zone has
been interpreted as the upper portion of the F Shoot deeps. Results
received thus far on drill fence 19000N should add and convert
inferred resources to indicated resources. Two additional holes
remain to be drilled on this section.
Notes
|
1.
|
See press release
entitled, 'Golden Star Doubles Inferred Mineral Resources at Wassa
Underground Gold Mine', dated April 12, 2018
|
2.
|
See press release
entitled, 'Golden Star Extends Wassa Underground Deposit a Further
200 Metres to the South', dated Sept 20, 2018
|
Wassa Underground Inferred to Indicated Mineral Resource
Conversion Drilling
The Inferred to Indicated mineral resource conversion drilling
continued with rigs moving south of the 2018 year end reserve
limits on 19400N. Additional holes on sections 19450 and 19400N
have also been completed to close off the up and down dip
extensions of the B Shoot Mineralization as well as step to the
south on 19350 to 19000N where drilling is ongoing.
Since the year end resource model update, three holes were
drilled on drill fence 19400N, testing the up dip extension of the
B Shoot mineralizing, two of the holes returned significant widths
and grades, BSDD19-396D1 intersected 14.2
m grading 6.2 g/t and BSDD19-396D1 intersected a new
footwall zone of 22.7m grading 4.1
g/t. Both of these holes should have a positive effect on the
existing Inferred mineral resource in this area.
Seven new holes were drilled on drill fence 19350N located
50 m south of the current mineral
reserve base. All of these holes have confirmed the widths and
grades previously modeled with some extensions up and down dip.
These Inferred resources will be converted to Indicated in the next
mineral resource model update.
Results for additional drilling on the 50 metre drill fences
have also been received for 19200 and 19100N with wider and higher
grade intercepts being seen. On 19200N BSDD19-397M two zones have now been intersected,
10.2 m grading 6.8 g/t and a lower B
shoot zone of 13.9 m grading 3.2 g/t.
The previous B shoot interpretation on this fence only had a single
mineralized zone.
Significant intercepts – Wassa Surface Drilling
Results
The full set of drilling results released today (including the
significant intercepts set out in Table 1 below) is listed in
Appendix A, which can be found on the Company's website or by
following:
http://www.gsr.com/operations/wassa/wassa-main/default.aspx.
Table 1
New Wassa Surface drilling
Significant Results (not included in 2018 year end resource
estimates)
HOLE
ID
|
Azimuth
(°)
|
Dip
(°)
|
From
(m)
|
To
(m)
|
Drilled
Width
(m)
|
~True
Width
(m)
|
Grade
Au
(g/t)
|
Drilling
Objective
|
Target
|
BSDD19-400M
|
266.1
|
-60.1
|
1227
|
1263.3
|
36.3
|
19.5
|
5.4
|
Step out
|
WUG deeps
|
BSDD19-398M
|
82.6
|
-66.1
|
584
|
590.2
|
6.2
|
4.7
|
8.7
|
Inf
Conversion
|
B Shoot
|
BSDD19-398D1
|
90.2
|
-59.1
|
220.5
|
229.5
|
9
|
7.5
|
5.5
|
Inf
Conversion
|
B Shoot
|
BSDD19-397M
|
77.7
|
-79.2
|
666
|
683
|
17
|
10.2
|
6.8
|
Inf
Conversion
|
B Shoot
|
BSDD19-397M
|
81.7
|
-80.3
|
787.8
|
811.6
|
23.8
|
13.9
|
3.2
|
Inf
Conversion
|
B Shoot
|
BSDD19-396D2
|
92.4
|
-55.8
|
478
|
506
|
28
|
25.6
|
4.1
|
FW target
|
B Shoot FW
|
BSDD19-396D1
|
81.6
|
-70.8
|
283.4
|
306
|
22.6
|
14.3
|
6.2
|
Inf
Conversion
|
B Shoot
|
BSDD19-394D3
|
70.4
|
-80.6
|
152
|
164
|
12
|
6.8
|
7.9
|
Inf
Expansion
|
B Shoot
|
BSDD19-394D3
|
88.6
|
-81
|
516.5
|
545
|
28.5
|
15.9
|
4.5
|
Inf
Expansion
|
B Shoot
|
BSDD19-394D2
|
80.7
|
-76.8
|
112.5
|
116.5
|
4
|
3.6
|
11.1
|
Inf
Expansion
|
B Shoot
|
BSDD19-394D2
|
79.5
|
-75.9
|
214
|
239.2
|
25.2
|
22.7
|
8.9
|
Inf
Expansion
|
B Shoot
|
BSDD19-388D3
|
82.6
|
-67.9
|
355.5
|
382
|
26.5
|
25.2
|
3.3
|
Inf
Expansion
|
B Shoot
|
BSDD19-388D3
|
85
|
-67.3
|
406
|
410.5
|
4.5
|
4.3
|
12.2
|
Inf
Expansion
|
B Shoot
|
BSDD19-388D3
|
81.3
|
-66.4
|
423.2
|
453.4
|
30.2
|
29
|
5.5
|
Inf
Expansion
|
B Shoot
|
BSDD19-388D3
|
77
|
-65.1
|
540.3
|
546.5
|
6.2
|
6
|
12.6
|
Inf
Expansion
|
B Shoot
|
BSDD19-388D3
|
83.4
|
-62.7
|
633.6
|
642.2
|
8.6
|
8.4
|
6.5
|
Inf
Expansion
|
B Shoot
|
BSDD19-388D3
|
85.6
|
-63.7
|
774
|
816
|
42
|
32.8
|
5.3
|
Inf
Expansion
|
B Shoot
|
BSDD19004
|
87.2
|
-64.1
|
472
|
488
|
16
|
14.8
|
2.6
|
Inf
Conversion
|
B Shoot
|
BS18DD394D1
|
82.3
|
-55.2
|
361.3
|
381.8
|
20.5
|
13.9
|
3.2
|
Inf
Expansion
|
B Shoot
|
BS18DD394D1
|
84.2
|
-54.5
|
421.8
|
447.4
|
25.6
|
17.6
|
34.1
|
Inf
Expansion
|
B Shoot
|
BS18DD394D1
|
Including
|
-54.5
|
424.5
|
425
|
0.5
|
0.3
|
1548
|
Inf
Expansion
|
B Shoot
|
BS18DD394D1
|
Including
|
-54.7
|
436.4
|
439.4
|
3
|
2.1
|
19.8
|
Inf
Expansion
|
B Shoot
|
BS18DD394D1
|
Capped
@ 30 g/t
|
-54.5
|
421.8
|
447.4
|
25.6
|
17.6
|
4.5
|
Inf
Expansion
|
B Shoot
|
BS18DD394D1
|
83.9
|
-55.1
|
456.4
|
479.4
|
23
|
15.7
|
4.1
|
Inf
Expansion
|
B Shoot
|
BS18DD393D6
|
110.9
|
-69.6
|
83
|
122.8
|
39.8
|
34.6
|
7.6
|
Inf
Conversion
|
B Shoot
|
BS18DD393D6
|
108.9
|
-69.9
|
149.7
|
178
|
28.3
|
18.2
|
2.5
|
Inf
Conversion
|
B Shoot
|
BS18DD393D6
|
105.3
|
-68.8
|
383.1
|
413.8
|
30.7
|
20.2
|
3.3
|
Inf
Conversion
|
B Shoot
|
BS18DD393D5
|
123.4
|
-77.7
|
60
|
89
|
29
|
22.9
|
2.9
|
Inf
Conversion
|
B Shoot
|
BS18DD393D4
|
178.3
|
-83.9
|
74.5
|
95.6
|
21.1
|
15.2
|
13.2
|
Inf
Conversion
|
B Shoot
|
BS18DD393D4
|
154.1
|
-84
|
174.3
|
186.8
|
12.5
|
5.5
|
6.3
|
Inf
Conversion
|
B Shoot
|
BS18DD392D3
|
74.6
|
-50.4
|
1051.2
|
1078.2
|
27
|
22.4
|
2.5
|
Inf
Expansion
|
WUG deeps
|
242DD19002
|
323
|
-62.8
|
432
|
437
|
5
|
4.6
|
7.4
|
Inf
Expansion
|
242 target
|
Wassa Underground's Current Drilling Program and Next
Steps
The drilling programs at Wassa will be scaling back over the
next quarter with drill rigs being reduced from 8 rigs down to 4.
The drilling will now focus on the conversion of Inferred resources
to Indicated. Approximately 10,000 to 15,000
m remain in the 2019 budget and, when completed, work will
commence on updating the geological interpretations and grade
estimates. The updated resource models will be used for the
preparation of the 2020 Budgets/Life of Mine planning as well as
further drill hole planning from surface and underground.
FATHER BROWN DRILLING RESULTS
Drilling at the Father Brown project has continued since the
last update (press release dated February
19, 2019 titled "Golden Star Updates Mineral Resource
Statement at Father Brown: 93% Increase in Inferred Mineral
Resources") with two rigs drilling steadily. The budgeted program
was exceeded with 12,197 m being
drilled compared to the 8,900 m that
were initially planned. Drilling will be completed this month and
resource models will be updated and forwarded to the Company's
planning engineers for economic assessment in order to determine
whether an underground mine would be economically viable and this
will drive future drilling decisions. Updated resource
estimates for the Father Brown deposit are expected to be completed
in Q3 2019.
The Father Brown deposit is characterized by at least two
mineralized structures, the Father Brown ("FBZ") structure which
strikes roughly N-S and dips to the west at approximately 40
degrees and the Adoikrom ("ADK") structure that strikes NE-SW and
dips -65 degrees to the West. Drilling to date indicates that the
ADK zone is likely the primary gold bearing fluid pathway whereas
the FBZ zone is a secondary linking or splay structure. The FBZ
structure does not appear to extend past the ADK zone which means
gold bearing fluids moved along the ADK structure at depth and then
propagated along both structures at the intersection. Based on
this, current interpretation the ADK structure is the focus of
exploration drilling, in particular the higher grade shoot with in
this zone that has a well-defined plunge of 50 to 60 degrees to the
south.
Two holes were drilled to test the high grade plunge of the ADK
structure and results have been received for one which has
confirmed this hypothesis, FUGDD19-039M targeted this zone approximately
200 m down plunge from the last
drilling, approximately 825 m from
surface and intersected 8.1 m grading
8.7 g/t. The second hole has been logged and sampled and assays are
pending.
Significant Intercepts – Father Brown Drilling
Results
The full set of drilling results released today (including the
significant intercepts set out in Table 2 below) is listed in
Appendix B, which can be found on the Company's website or by
following:
http://www.gsr.com/operations/wassa/wassa-main/default.aspx.
Table 2
Father Brown Surface drilling Significant Results Q2 –
2019
Hole
ID
|
Azimuth
(°)
|
Dip
|
From
(m)
|
To
(m)
|
Interval
(m)
|
~ True
Width
|
Au
g/t
|
Zone
|
FUGDD19020
|
87.5
|
-68.9
|
367.8
|
370.0
|
2.2
|
1.6
|
11.40
|
ADK HW
|
FUGDD19022
|
102.8
|
-74.8
|
636.0
|
640.0
|
4.0
|
2.7
|
4.78
|
ADK
|
FUGDD19023
|
89.6
|
-71.3
|
441.4
|
447.0
|
5.6
|
4.0
|
3.70
|
ADK
|
FUGDD19025
|
94.9
|
-64.4
|
536.5
|
542.0
|
5.5
|
4.4
|
4.28
|
ADK
|
FUGDD19025
|
95.3
|
-64.4
|
549.8
|
551.3
|
1.5
|
1.2
|
12.4
|
ADK FW
|
FUGDD19028
|
83.8
|
-61.2
|
192.2
|
197.0
|
4.8
|
4.0
|
2.9
|
ADK
|
FUGDD19029
|
90.4
|
-71.1
|
513.1
|
516.8
|
2.6
|
2.5
|
9.2
|
FBZ
|
FUGDD19029
|
93.2
|
-69.9
|
636.3
|
640.8
|
4.5
|
3.3
|
4.4
|
ADK
|
FUGDD19031A
|
86.6
|
-71.9
|
573.0
|
579.0
|
6.0
|
4.3
|
3.2
|
ADK
|
FUGDD19032A
|
78.6
|
-75.0
|
606.0
|
610.0
|
4.0
|
2.7
|
3.7
|
ADK
|
FUGDD19033
|
96.7
|
-69.0
|
495.0
|
504.0
|
9.0
|
6.7
|
5.6
|
ADK
|
FUGDD19033
|
96.6
|
-68.7
|
522.0
|
527.1
|
5.1
|
3.8
|
2.8
|
ADK FW
|
FUGDD19035
|
92.8
|
-61.0
|
380.6
|
396.6
|
16.0
|
13.3
|
7.2
|
ADK
|
FUGDD19036A
|
94.5
|
-67.6
|
139.0
|
145.0
|
6.0
|
4.6
|
6.9
|
ADK
|
FUGDD19039M
|
91.0
|
-80.0
|
826.0
|
839.5
|
13.5
|
8.1
|
8.7
|
ADK
|
All monetary amounts refer to United States dollars
unless otherwise indicated.
Company Profile
Golden Star is an established
gold mining company that owns and operates the Wassa and Prestea
underground mines in Ghana,
West Africa. Listed on the NYSE
American, the Toronto Stock Exchange and the Ghana Stock Exchange,
Golden Star is focused on delivering
strong margins and free cash flow from its two high-grade, low cost
underground mines. Gold production guidance for 2019 is
220,000-240,000 ounces at a cash operating cost per ounce of
$620-$680. As the winner of the PDAC 2018
Environmental and Social Responsibility Award, Golden Star is committed to leaving a positive
and sustainable legacy in its areas of operation.
Statements Regarding Forward-Looking Information
Some statements contained in this news release are
"forward-looking statements" within the meaning of the Private
Securities Litigation Reform Act of 1995 and "forward looking
information" within the meaning of Canadian securities laws.
Forward looking statements and information include but are not
limited to, statements and information regarding: the potential of
Wassa's Inferred Mineral Resources to increase through further
drilling; the acceleration of step out drilling of the B Shoot and
F Shoot upon receipt of the funds from La Mancha; upside potential
on the size of the Wassa deposit; the timing for the release of the
next Mineral Resource update; the timing of commencement of work on
the PEA; and production guidance and cash operating cost guidance
for 2018. Generally, forward-looking information and
statements can be identified by the use of forward-looking
terminology such as "plans", "expects", "is expected", "budget",
"scheduled", "estimates", "forecasts", "intends", "anticipates",
"believes" or variations of such words and phrases (including
negative or grammatical variations) or statements that certain
actions, events or results "may", "could", "would", "might" or
"will be taken", "occur" or "be achieved" or the negative
connotation thereof. Investors are cautioned that forward-looking
statements and information are inherently uncertain and involve
risks, assumptions and uncertainties that could cause actual facts
to differ materially. There can be no assurance that future
developments affecting the Company will be those anticipated by
management. Please refer to the discussion of these and other
factors in Management's Discussion and Analysis of financial
conditions and results of operations for the year ended
December 31, 2018 and our annual
information form for the year ended December
31, 2018, each of which is filed on SEDAR
at www.sedar.com. The forecasts contained in this press
release constitute management's current estimates, as of the date
of this press release, with respect to the matters covered
thereby. We expect that these estimates will change as new
information is received. While we may elect to update these
estimates at any time, we do not undertake any estimate at any
particular time or in response to any particular event.
Technical Information
The technical contents of this press release have been reviewed
and approved by S. Mitchel Wasel, BSc Geology, a Qualified Person
pursuant to National Instrument 43-101. Mr. Wasel is Vice President
of Exploration for Golden Star and
an active member and Registered Chartered Professional of
the Australasian Institute of Mining and Metallurgy.
The results for Wassa and Father Brown drilling stated herein
are based on the analysis of saw-split HQ/NQ diamond half core or a
three kilogram single stage riffle split of a nominal 25 to 30 kg
Reverse Circulation chip sample which has been sampled over nominal
one metre intervals (adjusted where necessary for mineralized
structures). Sample preparation and analyses have been carried out
at Intertek Laboratories in Tarkwa, which are independent
from Golden Star, using a 1,000 gram
slurry of sample and tap water which is prepared and subjected to
an accelerated cyanide leach (LEACHWELL). The sample is then rolled
for twelve hours before being allowed to settle. An aliquot of
solution is then taken, gold extracted into Di-iso Butyl Keytone
(DiBK), and determined by flame Atomic Absorption Spectrophotometry
(AAS). Detection Limit is 0.01 ppm.
All analytical work is subject to a systematic and rigorous
Quality Assurance-Quality Control (QA-QC). At least 5% of samples
are certified standards and the accuracy of the analysis is
confirmed to be acceptable from comparison of the recommended and
actual "standards" results. The remaining half core is stored on
site for future inspection and detailed logging, to provide
valuable information on mineralogy, structure, alteration patterns
and the controls on gold mineralization.
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SOURCE Golden Star Resources Ltd.