(via TheNewswire)
Company completes drilling at Sesmarias for 2023
Five holes drilled in the Sesmarias Central area targeting potentially high-grade hinge zone of Sesmarias synform-shaped VMS target;
One hole drilled to test potential west limb mineralization in the Sesmarias South area.
Company completes IP-Res geophysical survey over Sesmarias Central and North areas: results pending.
Partners
Avrupa Minerals and Sandfire Minerals making plans for continued work at Sesmarias in 2024.
The JV returned to drilling at Sesmarias in
As reported in June (see
The following general schematic section demonstrates how the target is perceived after 52 drillholes, geological and structural interpretation, surface geochemistry, and a variety of geophysical surveys since the original discovery in 2014.
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Figure 1. Schematic cross section of the Sesmarias massive sulfide target. Note that the field of view is 500 meters SW to NE and encompasses 1,400 meters of strike length of mineralization from SE to NW. Most of the drilling in the just-completed phase targeted the hinge zone of the Sesmarias synform in the Central area. Due to small, but important, post-mineral structural complications and drilling difficulties, three of five holes intersected the hinge zone massive mineralization and/or stockwork, feeder-style mineralization, while one hole intersected the synform above targeted mineralization, and one hole missed below the hinge zone. The sixth hole targeted massive sulfide mineralization on west limb of the synform in the Sesmarias South area. The schematic section suggests that there is significant, un-explored target area in the hinge zone along strike and in both limbs of the synform, as well, along strike.
Encouraging results continued in the 6-hole phase of drilling in the Central and South areas on five separate fences over 600 meters of mineralized strike length. The following diagram shows the extent of drilling in the Sesmarias North and Central Zones from SES019 northwest to SES21-036 as shown in the general schematic section. The six recently-completed drill holes are highlighted in red.
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Figure 2. Drill hole locations and sections for Sesmarias North and Central (2014-2023).
The following tables summarize the most important results from the most recent drilling in the Sesmarias massive sulfide target area:
SES23-047
Drillhole | Interval | From | To | Cu (%) | Pb (%) | Zn (%) | Ag (g/t) | Au (g/t) | |
SES23-047 | 26.95 | 393.80 | 420.75 | 2.18 | 2.58 | 5.60 | 88.2 | 0.33 | |
w/i | 43.40 | 392.80 | 436.20 | 1.51 | 2.15 | 4.78 | 64.1 | 0.26 |
Table 1. Previously-reported high-grade results from SES23-047. The hole intersected massive sulfides near the presumed bottom of the hinge zone on Section 650 South.
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Figure 3. Section 650 South showing SES002, SES003, SES23-041, and SES23-047.Note that SES23-041 crossed the Sesmarias synform above the hinge zone, and missed mineralization. It appears that the high grade SES002/003 mineralization may have been displaced from the larger hinge zone target intersected by SES23-047.
SES23-048
Drillhole | Interval | From | To | Cu (%) | Pb (%) | Zn (%) | Ag (g/t) | Au (g/t) | |
SES23-048 | 9.20 | 419.10 | 428.30 | 1.20 | 1.46 | 3.05 | 30.1 | 0.43 | |
and | 8.30 | 428.30 | 436.60 | 0.31 | anom. | 0.33 | anom. | 0.43 | |
total | 17.50 | 419.10 | 436.60 | 0.78 | --- | --- | --- | 0.43 | |
also | 0.25 | 348.40 | 348.65 | 1.01 | 0.74 | 1.32 | 39.2 | 0.14 |
Table 2. New results for SES23-048. The hole intersected 9.2 meters of massive sulfide mineralization, followed by 8.3 meters of stockwork sulfide mineralization near the presumed top of the hinge zone, or possibly on the western, upright limb of the Sesmarias synform on Section 800 South.
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Figure 4. Section 800 South showing SES23-048.
SES23-049
Drillhole | Interval | From | To | Cu (%) | Pb (%) | Zn (%) | Ag (g/t) | Au (g/t) | |
SES23-049 | no significant results | ||||||||
0.70 | 332.55 | 333.25 | 0.29 | 0.19 | 0.32 | anom. | anom. |
Table 3. SES23-049 did not cut significant mineralization, as the hole crossed too high in the Sesmarias synform, much like SES23-041, drilled in 2021. Fragments of massive sulfide mineralization are present in the major thrust fault that bounds and cuts the eastern, overturned limb of the Sesmarias synform.
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Figure 5. Section 500 South showing SES23-049 and SES23-051. SES23-049 crossed the synform above the hinge zone, while SES23-051 crossed zinc-rich stockwork sulfide mineralization below the hinge zone. Significant results for SES23-051 are found below in Table 5.
SES23-050
Drillhole | Interval | From | To | Cu (%) | Pb (%) | Zn (%) | Ag (g/t) | Au (g/t) | |
SES23-050 | samples in lab -- no significant results expected, though crossed faulted east limb at 397.50 to 398.70 meters, below hinge zone |
Table 4. SES23-050 did not intersect any significant visible mineralization, as the hole crossed beneath the Sesmarias synform. It did cross the eastern limb fault containing abundant disseminated and fragmented pyrite.
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Figure 6. Section 950 South showing SES23-050 crossing below the hinge zone. Folding of the hinge zone is possible, as shown in the section, but not yet confirmed.
SES23-051
Drillhole | Interval | From | To | Cu (%) | Pb (%) | Zn (%) | Ag (g/t) | Au (g/t) | |
SES23-051 | 9.00 | 456.80 | 465.80 | anom. | 0.99 | 2.35 | 11.7 | anom. | |
and | 8.00 | 467.80 | 475.80 | anom. | 3.04 | 3.47 | 50.7 | wk anom. | |
strong stkwk | 19.00 | 456.80 | 475.80 | --- | 1.77 | 2.61 | 27.3 | --- | |
total stkwk | 30.70 | 456.80 | 487.50 | --- | 1.18 | 1.88 | 17.8 | --- | |
remainder of samples in lab -- no significant results expected, below hinge zone |
Table 5. SES23-051 crossed 30.7 meters of zinc-rich stockwork sulfide mineralization beneath the hinge zone. This included an intercept of 9 meters of semi-massive to massive sulfide mineralization and a further zone of 8 meters of semi-massive sulfides, followed by another 11.7 meters of stockwork sulfide mineralization. The cross section for SES23-051 is shown above in Figure 4.
SES23-052
Drillhole | Interval | From | To | Cu (%) | Pb (%) | Zn (%) | Ag (g/t) | Au (g/t) | |
SES23-052 | 5.60 | 358.60 | 364.20 | 0.45 | --- | --- | --- | 0.33 | |
and | 7.00 | 366.20 | 373.20 | anom. | 0.84 | 2.72 | 24.8 | wk anom. | |
incl. | 4.00 | 368.20 | 372.20 | anom. | 3.40 | wk anom. | |||
3.00 | 370.20 | 373.20 | anom. | 1.33 | wk anom. | ||||
2.00 | 370.20 | 372.20 | anom. | 45.1 | wk anom. | ||||
w/i | 28.40 | 358.60 | 387.00 | total zone of sulfides, including insipient stkwk to massive mineralization | |||||
now cutting remainder of samples -- no significant intervals of high-grade results expected, though several zones of stkwk exist |
Table 6. SES23-52 crossed the western, upright limb of the Sesmarias synform in the Sesmarias South area. This is the first deeper intersection of the western limb in the Central and South zones at Sesmarias. The intersect included 28.4 meters of variable sulfide mineralization from stockwork to massive mineralization.
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Figure 7. Section 1100 South showing SES022 and SES23-052 cutting the western limb of the Sesmarias synform.
The Joint Venture just completed a 6-line, 2100-meter-long IP-Resistivity survey covering the North and Central Zones. The hope is that the survey can assist in identification of stockwork sulfide mineralization in proximity to massive sulfides. We expect final results before the end of the month and these will be reported in due time.
Minas de Aguas Teñidas, S.A.(“Sandfire MATSA” or “MATSA”) is a mining company which owns and operates the MATSA Mining Operations in the
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On behalf of the Board,
“Paul W. Kuhn”
This news release was prepared by Company management, who take full responsibility for its content. Paul
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