Cabral Gold Drills 17.5m @ 4.0 g/t Gold at MG within the Cuiú Cuiú Gold District
Cabral Gold Drills 17.5m @ 4.0 g/t Gold at MG
within the Cuiú Cuiú Gold District
Vancouver, British Columbia--(Newsfile Corp. - April 21, 2022) -
Cabral Gold Inc.
(TSXV: CBR) (OTC
PINK: CBGZF)
("Cabral" or the
"
Company
") is pleased to provide assay results from six diamond-
drill holes testing the MG gold deposit within the Cuiú Cuiú gold
district in northern Brazil.
Highlights are as follows:
DDH272 intersected
17.5m @ 4.0 g/t gold
within the primary hard-rock MG gold deposit from
102.9m, including
5.5m @ 10.5 g/t gold
from 104.1m. The hole also cut a significant interval in the
overlying unconsolidated sediments that comprise the gold-in-oxide blanket returning
44.0m @ 0.5
g/t gold
from surface
DDH273 returned
18m @ 1.0 g/t
gold in unconsolidated sediments that comprise the gold-in-
oxide blanket, which included
1m @ 15.3 g/t gold
DDH285 encountered a significant mineralized interval within primary hard-rock material returning
31.0m @ 1.3 g/t gold
from 105.0m, including
0.5m @ 15.5 g/t gold
from 106.0m
DDH286 cut
8.6m @ 0.5 g/t
gold in the blanket from surface, and a broad interval of highly altered
and brecciated basement, which returned
47.0m @ 0.5 g/t
gold from 67.5m, including
13.5m @
0.9 g/t gold
from 81m, and including
9.8m @ 1.0 g/t gold
from 103.7m
DDH288 intersected
36.0m @ 1.1 g/t gold
from surface within the gold-in-oxide blanket, including
4.2m @ 4.0 g/t gold
from 16.0m and
2.3m @ 5.0 g/t gold
from 31.8m
Alan Carter, Cabral's President and CEO commented, "The drill program at MG continues to
demonstrate that a significant zone of higher grade mineralization occurs within the primary MG gold
deposit that forms a distinctive zone. In addition, the current drill program is intersecting excellent
widths of good grade material. The terrane is also working in our favour with positive relief improving
the strip ration for potential exploitation of the basement saprolite mineralization. Furthermore, the
results from the overlying gold-in-oxide blanket continue to demonstrate that a significant zone of
higher grade mineralization occurs within the extensive gold-in-oxide blanket."
MG Diamond-Drill Results
Assay results were returned on six diamond-drill holes (DDH272, DDH273, DDH274, DDH285,
DDH286, and DDH288) that were recently completed within the MG gold deposit (Figure 1).
Figure 1: Map showing the outline of the primary MG gold deposit that was defined in the 2018
resource estimate (defined by E-W trending zones) and the interpreted grade x thickness contours of
the overlying mineralized oxide blanket. The location of recently completed diamond-drill holes
(DDH272, DDH273, DDH274, DDH285, DDH286, and DDH288) are also shown.
To view an enhanced version of Figure 1, please visit:
https://orders.newsfilecorp.com/files/3900/121159_7dca2973645ef90c_002full.jpg
Section E553660
Prior to the Cabral's current drill campaign, only one historic diamond-drill hole, CC104, had ever been
drilled on Section E553660, which is located in the east central portion of the MG deposit (Figures 1 and
2). Results from earlier Cabral holes shown on this section, included DDH 208, 209, 210, and 211, and
RC238 and 239. Assay results for all of these holes were previously released (see press releases dated
April 15, 2021 and December 2, 2021).
The new diamond-drill holes, DDH272 and DDH273, were both drilled on section E553660 (Figures 1
and 2, Table 1) and tested the high-grade main zone within the primary MG gold deposit. Both holes
were drilled from the north to the south and were designed to intersect the primary mineralized zone
above a deep intercept within the only historic hole drilled on this section. Historic hole, CC104, returned
20.6m @ 1.64
from 269.4m downhole (a vertical depth of 210m), including
2.0m @ 8.7 g/t
(Figure 2).
The new holes also tested downdip of shallower high-grade intercepts obtained saprolite basement
intercept in in DDH209 which returned
21m @ 0.6 g/t gold
from 42m downhole, within a
63m @ 0.5 g/t
gold
intercept extending from surface (Figure 2).
Both the new holes on E553660 intercepted blanket mineralization from surface (Figure 2), confirming
the blanket extends 100m further north on this section. DDH 272 returned
44m @ 0.5 g/t
gold
from
surface, while DDH273 cut
18.0m @ 0.95 g/t gold
from surface, including
1.0m @ 15.3 g/t gold
from
3.0m downhole.
DDH272 and DDH273 also confirmed continuity of the main MG zone of mineralization in the basement
between the saprolite basement intercept in DDH209 and the deep historic intercept in CC104 (Figure
2).
DDH272 cut a zone of high-grade zone of mineralization. It returned
17.5m @ 4.0 g/t gold
from 102.9m
in highly altered and brecciated basement rocks, including
5.5m @ 10.5 g/t gold
from 104.1m.
The
latter 5.5m high-grade intercept was very well mineralized with quartz veining throughout. It contained
three separate bonanza intervals, including;
0.5m @ 42.7
g/t gold from 104.1m,
1.0m @ 13.8 g/t gold
from 106.6, and
0.5m @ 20.0 g/t gold
from 108.7.
DDH273 also encountered highly altered and brecciated basement rocks, returning
7.8m @ 1.2 g/t
.
The bonanza intervals encountered in DDH272 appears to occur at the interpreted intersection of the
main MG zone and a shallow-dipping structure extending downdip from DDH209, which returned
1.2m
@ 2.6 g/t gold
(Figure 2).
A similar structure was intersected in DDH272, and returned
5.6m @ 2.6 g/t
gold
from 134.7m.
It is also interpreted to be a shallow-dipping structure that intersects the main MG
mineralized zone (Figure 2).
It is also worth remembering that there is also a new footwall zone that was discovered on section
E553660 in 2021.
Drilling 2021 confirmed the presence of a high-grade footwall zone approximately
100m to the south of the main zone on this section (see press release dated April 15, 2021). The 104
zone had only been cut by one historic drill hole (CC104) prior to the current drill program. It intersected
2.0m @ 70.2 g/t gold
from 112.5m. Follow-up holes, DDH 208 and DDH 209, were designed to test
vertical continuity of that footwall zone, and returned
2.1m @ 29.4 g/t gold,
including
0.5m @ 120.6 g/t
gold,
and
6.1m @1.3 g/t gold
, respectively (Figure 2).
Figure 2: Cross section of line E553660 at MG through the primary MG gold deposit and the overlying
gold-in-oxide blanket showing the location of DDH272 and DDH273 and previous drill holes on the
section
To view an enhanced version of Figure 2, please visit:
https://orders.newsfilecorp.com/files/3900/121159_7dca2973645ef90c_003full.jpg
Section E552950
Prior to the current program, no holes had been drilled on Section E552950 in the east central portion of
the MG deposit (Figure 1 and Figure 3).
All drilling on this section was designed to provide strike and
vertical continuity through a nearly 100m gap in the drill database between sections E552903 and
E552996. Result from RC holes 212, 213 and 214 on the section (Figure 3) were released previously
(see press release dated November 24, 2021).
Both of the new diamond-drill holes, DDH 285 and 286, were drilled from the same platform (Figures 1
and 3) and were principally designed to test fresh basement mineralization. Each encountered multiple
deep intercepts within the basement, as well as a thin veneer of transported oxide-blanket mineralization
extending from surface.
The new drilling confirmed oxide-blanket mineralization extends at least 50m north of previous drilling on
Section E552950 (Figure 3). Both DDH285 and DDH 286 intersected blanket mineralization from
surface (Figure 3, Table 1), returning
8.0m @ 0.4 g/t gold
, and
8.6m @ 0.5 g/t gold
, respectively.
The unconformable oxide blanket is fairly thin throughout the section, whilst broad zones of oxidized, soft,
saprolite basement mineralization come nearly to surface along the north side of a hill, where intense
weathering and oxidation extends to vertical depths of approximately 35m below surface.
Within the basement on Section E552950 the main MG mineralized zone is broader, and drilling
confirmed multiple subzones can be traced to more than 130m below surface, while remaining open
downdip (Figure 3, Table 1).
DDH285 intersected
31.1m @ 1.3 g/t gold
from 105.0m, including
0.5m @ 15.5 g/t gold
from 106.0m.
DDH286 returned
47.0m @ 0.5 g/t gold
from 67.5m, including
13.5m @ 0.9 g/t gold
from 81m, and
including
9.8m @ 1.0 g/t gold
from 103.7m.
Figure 3: Cross section on line E552950 at MG through the primary MG gold deposit and the
overlying gold-in-oxide blanket showing the location of DDH285, DDH286 and previous holes
drill on
the section.
To view an enhanced version of Figure 3, please visit:
https://orders.newsfilecorp.com/files/3900/121159_7dca2973645ef90c_004full.jpg
Section E553350
Prior to the current program no holes had been drilled on Section E553350 on the western central side
of the MG deposit (Figure 1).
All drilling on the section was designed to provide strike and vertical
continuity through an 85m gap in the drill database between Sections E553310 and E553395. Result
from RC holes 210 and 211 (Figures 1 and 4) were released previously (see press release dated
November 24, 2021).
As was the case in Section E552950 discussed above, the unconformable oxidized blanket
mineralization on this section is fairly thin, forming the cap on the top and sides of a pronounced hill.
Close to surface the basement mineralization is highly weathered and oxidized to saprolite which
extends from near the top of the hill, to vertical depths of approximately 50m below surface (Figure 4).
The new diamond hole, DDH 288 (Figures 1 and 4) was designed to test for potential footwall zones
within the fresh basement mineralization as well as for basement saprolite and oxide blanket. It
encountered a thin horizon of transported oxide-blanket mineralization extending from surface, two thick
intercepts of saprolite basement mineralization directly below the oxide blanket, and two weak deep
intercepts within the basement.
The saprolite intercepts are interpreted to be the up-dip oxidized and
highly weathered extension of the subvertical MG basement main zone.
The oxide blanket intercept in DDH288 returned
7.0m @ 0.7 g//t gold
from surface (Figure 4). It directly,
and unconformably overlies two weathered basement saprolite zones (Figure 4, Table 1). The northern
saprolite zone returned
29.0m of 1.2 g/t gold
from 7.0m, including;
4.2m @ 4.0 g/t gold
from 16m, and
2.3m @ 5.0 g/t gold
from 31.8m, while the southern saprolite zone returned
7.0m @ 0.3 g/t gold
from
47.0m.
Hole DDH288 also tested for the down-dip extension of basement saprolite encountered in RC0210,
which returned
1.0 g/t gold over 19m
.
The zone appears to be narrower within the basement, running
just
1.0m @ 0.8 g/t gold
.
A second deeper narrow intercept is interpreted to be a shallow-dipping
structure extending from the north (Figure 4). It is also possible that both intercepts are shallow-dipping
structures that extend down-dip towards the interpreted main zone.
Additional holes were already planned to test the downdip extension of interpreted MG main zone
saprolite into basement for this section but have not yet been drilled due to sequencing. At this time no
drilling to test the basement main zone has yet been done below the saprolite on this section (Figure 4).
These holes should be completed in the next few weeks.
Figure 4: Cross section on line E553350 at MG through the primary MG gold deposit and the
overlying gold-in-oxide blanket showing the location of DDH288 and all other previous holes drilled
on this section
To view an enhanced version of Figure 4, please visit:
https://orders.newsfilecorp.com/files/3900/121159_7dca2973645ef90c_005full.jpg
Section E553800
Section E553800 lies towards the eastern side of the MG deposit (Figure 1). Prior to the current drill
campaign only one historic diamond-drill hole (CC70) had ever been drilled on this section. It returned an
oxide blanket intercept of
32.0m @ 0.28 g/t gold
from surface, and two low-grade basement intercepts
(
13.5m @ 0.4 g/t gold
and
10.5m @ 0.61 g/t gold
.
Cabral completed several RC holes in 2021, that were released late in the year, including RC159,
RC160, RC161 and RC218 (see press release dated October 14, 2021 and November 24, 2021).
All the RC holes were designed to define the gold-in-oxide blanket, although RC161 did confirm the
upper basement zone within CC70. RC161 was designed to test for blanket mineralization, but returned
25.0m @ 0.8 g/t
from 57.0m to the base of the saprolite. This is probably the weathered up-dip
extension of basement mineralization. It continued to cut assay values in the fresh basement, returning
16m @ 1.0 g/t gold
below the base of the saprolite in fresh rock, starting at 82m downhole.
Diamond-drill hole DDH274 encountered oxidized blanket from surface, and returned
11.3m @ 0.3 g/t
gold
from 11.5m downhole. It also returned
8.5m @ 0.8 g/t gold
from 146.5m (Table 1) indicating the
zone encountered in CC70 and RC161 does continues at depth.
Observations
The change in surface topography approaching the western half of the MG deposit may provide
additional benefit for the eventual exploitation of the MG mineralization.
The hill has significant positive
relief that should result in a reduced strip ratio for the initial exploitation of the upper oxidized saprolite
main zone and overlying oxide blanket.
As discussed in earlier press releases, this oxidized saprolite and colluvial material should be largely
free-digging with lower mining costs.
Moreover, preliminary bottle-roll tests, from the company's ongoing
heap-leach test work at KCA labs oxide material was very positive for both oxidized blanket material and
basement saprolite mineralization (see press release dated February 24, 2022).
Bottle-roll tests of six
samples of various grades from saprolite and blanket oxide mineralized types returned 91 to 97% gold
recoveries over 48 hours. The best recoveries (97%) were from a basement saprolite basement sample
grading 2.3 g/t gold.
Heap-leach column testing on a large representative composite sample is ongoing
and results should be available in May. This will determine whether Cuiú Cuiú basement saprolite
mineralization and oxide blanket are amenable to low-cost, low-capital, heap-leach processing.
Multiple-oriented vein structures contribute significantly to the mineral inventory at many deposits. One of
the best examples is Eldorado Gold's world-class, intrusive-hosted Sigma and Lamaque mines and the
nearby Triangle mine in Val D'Or, Quebec (Eldorado Gold press release dated September 5, 2019).
Sigma and Lamaque combined to produce 9.5 million ounces of gold from 1935 to 2012. The bonanza
grade intercepts at MG have now been traced continuously along strike for at least 235m. They remain
open on strike and downdip (see press release dated March 10, 2022). Like Sigma and Lamaque,
shallow-dipping structures may form an important control to bonanza grades, and may also provide
additional gold resources.
Drill Hole
#
Weathering
Mineralized Zone
From
to
Width
Grade
m
m
m
g/t gold
DDH272
Oxide/Saprolite
Blanket
0.0
44.0
44.0
0.5
95.9
98.9
3.0
1.0
102.9
120.4
17.5
4.0
Incl.
104.1
109.6
5.5
10.5
127.3
128.3
1.0
1.0
134.7
140.3
5.6
2.6
EOH
177.50
DDH273
Oxide/Saprolite
Blanket
0.0
18.0
18.0
1.0
incl.
3.0
4.0
1.0
15.3
195.2
203.0
7.8
1.2
EOH
283.10