Additional Drill Results At The Curipamba Project 

TORONTO - Adventus Zinc Corporation and Salazar Resources Limited reported additional drill holes from the 2018 infill drilling program on the El Domo volcanogenic massive sulphide (VMS) deposit, which is part of the approximately 22,000-hectare Curipamba project located near Las Naves, Ecuador.

Infill drilling continues to yield intercepts of high-grade, gold-rich semi-massive to massive sulphide mineralization within the open-pit constrained Mineral Resource update for the El Domo VMS deposit completed by Roscoe Postle Associates Inc. (RPA). The Indicated Mineral Resource totals 8.8 million tonnes grading 1.62% copper, 2.34 g/t gold, 2.42% zinc, 48.0 g/t silver, and 0.27% lead. The Inferred Mineral Resource totals 2.6 million tonnes grading 1.29% copper, 1.09 g/t gold, 1.51% zinc, 29.0 g/t silver, and 0.14% lead. The National Instrument (NI) 43-101 Technical Report was authored by Independent Qualified Person Dr. Lars Weiershäuser, P.Geo., of RPA (based in Toronto, Ontario, Canada) who is a Qualified Person as defined by NI 43-101. 

The infill drilling program commenced in early March 2018 with the objective of upgrading the confidence level of the higher-grade portion of the open-pit constrained Mineral Resource by decreasing drill spacing, which will also generate material for a planned metallurgical program in the second half of 2018. One drill rig from the drilling contractor has been dedicated to this work program.  To date, drilling within higher-grade portion of the open-pit constrained Mineral Resource has successfully completed approximately 3,500 meters from a planned 7,500 meter modeling work program that is expected to be completed by the end of the second quarter of 2018.  Seventeen infill drill holes have been successfully completed with eight drill holes having now passed quality assurance and quality control (QAQC).  One drill hole is currently in the process of being drilled.

From the 3,500 meters successfully completed, thirteen drill holes have intersected either semi-massive or massive sulphide mineralization.  The other four drill holes did not have significant results because they were designed to refine the limits of VMS mineralization along the margins of the open-pit constrained Mineral Resource. Overall, drilling results have confirmed the quality of the geological and structural modeling completed by RPA, notably the semi-massive to massive sulphide mineralization.

Drill hole CURI-257 intersected a zone of semi-massive sulphide mineralization that transitioned into well mineralized dacite volcaniclastic rocks along the southern margin of El Domo. The intercept is from 67.80 to 72.60 meters for an approximate true thickness of 4.32 meters, grading 0.66% copper, 1.63 g/t gold, 3.58% zinc, 60.5 g/t silver, and 0.42% lead.  A subset interval of semi-massive sulphide mineralization does possess higher gold and silver assay results from 67.80 to 69.95 meters, grading 0.17% copper, 2.81 g/t gold, 3.05% zinc, 88.5 g/t silver, and 0.70% lead.

Drill hole CURI-259 intersected two mineralized grainstone units, which are a resedimented volcaniclastic rock with massive sulphide clasts.  The first interval was from 46.63 to 49.15 meters for an approximate true thickness of 2.27 meters grading 1.29% copper, 3.06 g/t gold, 1.99% zinc, 38.5 g/t silver and 0.14% lead.  The second unit was intersected from 64.89 to 67.56 meters for an approximate true thickness of 2.40 meters grading 0.72% copper, 3.51 g/t gold, 4.97% zinc, 214.4 g/t silver, and 1.34% lead.  Massive sulphide mineralization was then intersected from 67.56 to 71.97 meters for an approximate true thickness of 3.97 meters grading 5.95% copper, 3.27 g/t gold, 6.52% zinc, 122.3 g/t silver, and 0.38% lead.

The intercept in CURI-260 has an approximate true thickness of 6.80 meter and intersected VMS mineralization from 80.65 to 88.20 meters grading 2.62% copper, 2.51 g/t gold, 5.27% zinc, 37.8 g/t silver, and 0.09% lead.  The top contact of the VMS mineralization appears to be faulted for the first 1.57 meters of massive sulphide mineralization, but grades into semi-massive sulphide mineralization then back into massive sulphide mineralization.  A subset interval of the massive sulphide mineralization is of even higher grade from 84.82 to 86.65 meter, grading 3.70% copper, 4.61 g/t gold, 14.22% zinc, 59.8 g/t silver, and 0.11% lead.  The lower contact also appears to be faulted from 87.49 to 88.20 meters and gradually transitions into both mineralized and hydrothermally altered dacite volcaniclastic rocks.

Below the massive sulphide mineralization, drilling also intersected a low-grade stockwork zone within the dacite volcaniclastic rocks from 93.94 to 103.26 meters that corresponds to other similar low-grade stockwork zones stratigraphically below El Domo.  However, a higher-grade subset does occur from 100.76 to 103.26 meters, grading 2.63% copper, 1.70 g/t gold, 1.65% zinc, 23.4 g/t silver, and 0.09% lead.  A second, narrow stockwork zone was intersected from 215.04 to 217.18 meters, grading 1.40% copper, 0.16 g/t gold, 0.14% zinc, and 0.9 g/t silver.

Drill hole CURI-261 intersected thin, high-grade, mineralized grainstone from 53.98 to 55.77 meters for an approximate true thickness of 1.43 meters grading 3.80% copper, 5.85 g/t gold, 3.61% zinc, 122.3 g/t silver, and 0.38% lead.  A second, finer-grained, mineralized grainstone was intersected directly above the massive sulphide mineralization from 76.18 to 81.33 meters for an approximate true thickness of 4.12 meters grading 0.43% copper, 2.95 g/t gold, 5.74% zinc, 128.3 g/t silver, and 0.65% lead.  A subset interval of the grainstone is of even higher grade from 76.18 to 78.08 meters, grading 0.43% copper, 5.15 g/t gold, 9.58% zinc, 288.41 g/t silver, and 1.58% lead. 

The grainstone transitioned into massive sulphide mineralization, which occurs from 81.33 to 89.79 meters for an approximate true thickness of 6.77 meters grading 4.24% copper, 0.54 g/t gold, 2.31% zinc, 15.98 g/t silver, and 0.01% lead.  A subset interval of massive sulphide mineralization is of even higher grade from 81.33 to 86.02 meters, grading 7.23% copper, 0.72 g/t gold, 4.15% zinc, 25.72 g/t silver, and 0.01% lead.

Drill holes CURI-240 through CURI-249, and CURI-251 were designed to probe the favorable geology south of El Domo.  To date, drilling successfully completed approximately 2,560 meters from a planned 2,500 meter work program that completed on schedule.  Eleven exploration drill holes were successfully completed with all having passed QAQC.

Although these drill holes did intersect the favorable volcanic strata with hydrothermal alteration of the footwall rocks for El Domo, no semi-massive to massive sulphide mineralization was intersected.  Several drill holes did, however, intersect wide intercepts of low-grade stockwork that could correspond to other similar low-grade stockwork zones stratigraphically below El Domo, approximately 420 meters to the north, and those recently identified at Sesmo target, approximately 1,900 meters to the northwest. 

These newly identified occurrences need to be reviewed in the context of how they link to the extensive hydrothermal plumbing system that drove the formation of massive sulphide mineralization at El Domo and how it is related to the Sesmo target. The drill holes have also confirmed modeling done by RPA of the southern margin of the deposit and provide excellent geological control for future modeling studies.