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Vista Gold Corp. Announces Positive Drill Results at its Mt Todd Gold Project

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Vista Gold Corp. Announces Positive Drill Results at its Mt Todd Gold Project






Vista Gold Corp. (NYSE American:VGZ) (TSX: VGZ) announced assay results for ongoing drilling at the Company’s 100% owned Mt Todd gold project located in Northern Territory, Australia. The mineralization intersected in hole VB21-011 is both thicker and of higher grade than observed in previous drill holes in the current program.



  • VB21-010 – two intercepts in the first 100 meters which total 36.6 meters with average grade of 0.51 grams gold per tonne (“g Au/t”) and various higher-grade intercepts in the following 102 meters, including 3.0 meters @ 1.48 g Au/t, 1.0 meter @ 13.83 g Au/t, and 1.0 meter @ 14.36 g Au/t; and
  • VB21-011 – of approximately 399 meters drilled, intersected 200 meters of mineralization with average grade of 0.63 g Au/t, including 9.9 meters @ 2.08 g Au/t, 14.3 meters @1.42 g Au/t, 10.2 meters @ 1.74 g Au/t, 26.7 meters @ 0.98 g Au/t, and 14.0 meters @1.22 g Au/t.


Frederick Earnest, President and CEO commented, “We have now completed 16 of 18 holes (5,466 of the planned 6,000 meters) in our current drill program. Each of the holes completed has intersected mineralization consistent with our geologic model for the area north of the Batman deposit. We are pleased that VB21-011 has demonstrated strike continuity of the mineralization intersected in the Northern cross load (Nxld). VB21-011 was collared 100 meters north of VB21-005 (29.4m @ 2.65 g/t) and has defined a number of well mineralized zones that aggregate into a thicker package. The Nxld intercepts have so far been of a higher grade than those intersected in Batman and we are looking forward to additional drilling planned in this area.” See Vista Gold CEO Video.


On a separate topic, Mr. Earnest added, “We appreciate the support of our current large shareholders in the recently completed financing and are pleased to welcome several new shareholders who have established significant initial holdings in Vista. We believe this is a recognition of the underlying value of Mt Todd and the opportunity to unlock greater value as we continue to execute on a strategy that has already seen important advances in the Project.”


Table 1 – Summary of Assay Results


Hole No. Grid Co-ordinates Survey Data Intersections
MGA94 Grid Easting MGA94 Grid Northing RL (m) Azimuth (°) Dip (°) Depth (m)   From (m) To (m) Interval (m) True Thickness (m) Grade (g/t Au) Sample Type
VB21-010 188071.0 8436413.0 153.0 86.0 -50.0 417.4   17.0 34.6 17.6 12.3 0.53 HQ ½ Core
              and 74.0 93.0 19.0 13.2 0.50 HQ ½ Core
              and 107.0 110.0 3.0 2.1 1.48 HQ ½ Core
              and 136.7 137.7 1.0 0.7 13.83 HQ ½ Core
              and 162.1 162.6 0.4 0.3 9.38 HQ ½ Core
              and 200.6 201.6 1.0 0.7 14.36 HQ ½ Core
              and 225.0 232.0 7.0 4.9 0.41 HQ ½ Core
              and 397.0 400.4 3.4 2.3 0.65 HQ ½ Core




Hole No. Grid Co-ordinates Survey Data Intersections
MGA94 Grid Easting MGA94 Grid Northing RL (m) Azimuth (°) Dip (°) Depth (m)   From (m) To (m) Interval (m) True Thickness (m) Grade (g/t Au) Sample Type
VB21-011 187728.0 8436500.0 148.0 265.0 -50.0 398.8   114.9 124.8 9.9 6.9 2.08 HQ ½ Core
              including 114.9 118.0 3.1 2.2 4.71 HQ ½ Core
              including 122.9 124.8 1.9 1.4 2.77 HQ ½ Core
              and 205.0 209.0 4.0 2.8 0.88 HQ ½ Core
              and 239.0 253.3 14.3 10.0 1.42 HQ ½ Core
              including 239.0 241.6 2.6 1.8 4.37 HQ ½ Core
              and 250.9 253.3 2.3 1.6 3.01 HQ ½ Core
              and 259.1 261.3 2.2 1.6 1.92 HQ ½ Core
              and 264.8 275.0 10.2 7.1 1.74 HQ ½ Core
              and 278.0 279.5 1.5 1.1 3.69 HQ ½ Core
              and 290.3 317.0 26.7 18.7 0.98 HQ ½ Core
              Including 290.3 296.0 5.7 4.0 1.34 HQ ½ Core
              and 303.0 317.0 14.0 9.8 1.22 HQ ½ Core
              including 306.2 308.5 2.3 1.6 3.44 HQ ½ Core
              and 331.0 331.7 0.6 0.5 1.86 HQ ½ Core
              and 377.7 377.9 0.2 0.1 13.78 HQ ½ Core



  1. Results are based on ore grade 50g fire assay for Au.
  2. Intersections are from diamond core drilling with half-core samples with 1 meter representative samples.
  3. Core sample intervals were constrained by geology, alteration or structural boundaries, intervals varied between a minimum of 0.2 meters to a maximum of 1.2 meters.
  4. Mean grades have been calculated on a 0.4g/t Au lower cut-off grade with no upper cut-off grade applied, and maximum internal waste of 4.0 meters.
  5. All intersections are downhole intervals, and reflect approximate true widths.
  6. All downhole deviations have been verified by downhole camera and/or downhole gyro.
  7. Collar coordinates surveyed by Earl James & Assoc., an independent surveyor, using Trimble R8 GNSS.
  8. The Company maintains a quality assurance/quality control (“QA/QC”) program, as further described below.
  9. The assay laboratories responsible for the assays were Northern Analytical Laboratories Pty Ltd (“NAL”), an independent ISO 9000 certified lab, Pine Creek, NT and Genalysis Laboratory Services Pty Ltd, Perth, WA, which is also independent from Vista.


Discussion of Results


VB21-010 was drilled to locate the intersection of the northern cross load structure with the north/south structure through the Golf-Tollis deposit. The hole was drilled to the East under the possible extension of the Golf-Tollis deposit and intersected the Jones Brothers deposit to the East. Although the hole was collared to the East for the Golf-Tollis extension, it intersected the Jones Brother loads 1 and 2. Those intersections are shown in the assay table as 0.4 meters @ 9.38 g Au/t and 1.0 meters @ 14.36 g Au/t. The Jones Brothers lode was mined historically as narrow, near vertical open cuts and limited underground workings from 1908 to 1910. Material from these workings was reported to have produced 19 Kg (~610 ounces) of gold from ore with an average grade of 27.5 g Au/t. (Historic reference, not a mineral reserve).


VB21-011 was drilled under VB21-007 and along strike north of VB21-002 and VB21-005 to test the continuation of near vertical structures previously encountered. Drilling confirmed a thickening of these in VB21-011, with mineralization that is different than found at the Batman deposit, with thicker and more intense veining. The area to the north of the Batman deposit appears to be more structurally complex than the Batman deposit; however, these differences offer opportunities to find higher-grade mineralization. VB21-011 has shown that there is both horizontal and vertical continuity. Figure 2 demonstrates the thickening of the mineralized structures with depth compared to the results of hole VB21-007.


Figure 1 – Plan View of Drill Holes


Figure 2 – Cross Section with VB21-007 and VB21-011


The sampling method and approach for the surface geochemistry and grab samples is as follows:

  • Soil samples are planned on a regular grid and a sample sheet is generated.
  • GPS is used to locate sample positions and a pelican pick is used to clear debris and any topsoil from the sample location 3.
  • The hole is dug to the B horizon and 7 to 10 kg of soil is collected and coarse sieved to remove stones etc., a fine mesh is then employed and the entire sample recovered post sieving is bagged.
  • Soil sampling is usually undertaken in the dry season, however if wet samples are obtained, they are dried in the logging shed prior to sieving.
  • Sample bags are calico and purchased pre-numbered, these are then packaged in groups of 5 for transportation to NAL, an independent ISO 9000 certified lab, Pine Creek, NT and Genalysis Laboratory Services Pty Ltd, Perth, WA, which is also independent from Vista.
  • As the site is closed to public access, no special security measures are undertaken.
  • A sample submission sheet is sent to the lab, detailing required methodology, and number of samples.
  • No identifying data relating to sample location is recorded on the bags submitted or the paperwork beyond bag numbers.


Rock chip and soil geochemical samples are routinely collected to determine if the potential exists for anomalous gold values below the surface. The presence of anomalous gold grades is not a guarantee of subsurface mineralization. While both rock chip and soil samples have sampling procedures, it is not considered rigorous enough to be relied upon for use in the estimation of mineral resources. Surface soil and rock chip samples are merely considered to be potential indicators of subsurface mineralization. Since the rock chip and soil assays are not used in mineral resource estimation, it is rare that any additional QA/QC or check assaying would be completed. The data are used on an as received basis.


It is the QP’s (as defined below) opinion that the sample preparation methods and quality control measures employed before dispatch of samples to an analytical or testing laboratory ensured the validity and integrity of samples taken.


John Rozelle, Vista’s Sr. Vice President, a Qualified Person (“QP”) as defined by Canadian National Instrument 43-101 – Standards of Disclosure for Mineral Projects, has verified the data underlying the information contained in and has approved this press release. The information contained in this press release does not change any of the mineral resources or reserves estimates contained in Vista’s October 7, 2019 NI 43-101 Technical Report, Mt Todd Gold Project, 50,000 tpd Preliminary Feasibility Study, Northern Territory, Australia. The information contained in this press release is provided to inform the reader of the growth of our geologic understanding of the Project. There has been insufficient exploration to define a mineral resource with respect to the exploration target areas and it is uncertain if further exploration will result in the exploration target areas being delineated as a mineral resource.


Data Verification and QA/QC


The sampling method and approach for the drillholes are as follows:

  • The drill core, upon removal from the core barrel, is placed into plastic core boxes;
  • The plastic core boxes are transported to the sample preparation building;
  • The core is marked, geologically logged, geotechnically logged, photographed, and sawn into halves. One-half is placed into sample bags as one-meter sample lengths, and the other half retained for future reference. The only exception to this is when a portion of the remaining core has been flagged for use in metallurgical testwork;
  • The bagged samples have sample tags placed both inside and on the outside of the sample bags. The individual samples are grouped into “lots” for submission to NAL, a certified lab, for preparation and analytical testing; and
  • All of this work was done under the supervision of a Vista geologist.

Processing of the core included photographing, geotechnical and geologic logging, and marking the core for sampling. The nominal sample interval was one meter. When this process was completed, the core was moved into the core cutting/storage area where it was laid out for sampling. The core was laid out using the following procedures:

  • One meter depth intervals were marked out on the core by a member of the geologic staff;
  • Core orientation (bottom of core) was marked with a solid line when at least three orientation marks aligned and used for structural measurements. When orientation marks were insufficient an estimated orientation was indicated by a dashed line;
  • Geologic logging was then done by a member of the geologic staff. Assay intervals were selected at that time and a cut line marked on the core. The standard sample interval was one meter, with a minimum of 0.2 m and a maximum of 1.2 m;
  • Blind sample numbers were then assigned based on pre-labeled sample bags. Sample intervals were then indicated in the core tray at the appropriate locations; and
  • Each core tray was photographed and restacked on pallets pending sample cutting and stored on site indefinitely.


The core was then cut using diamond saws with each interval placed in sample bags. At this time, the standards and blanks were also placed in plastic bags for inclusion in the shipment. A reference standard or a blank was inserted at a minimum ratio of 1 in 10 and at suspected high grade intervals additional blanks sample were added. Standard reference material was sourced from Ore Research & Exploration Pty Ltd and provided in 60 g sealed packets. When a sequence of five samples was completed, they were placed in a shipping bag and closed with a zip tie. All of these samples were kept in the secure area until crated for shipping.


Samples were placed in crates for shipping with 100 samples per crate (20 shipping bags). The crates were stacked outside the core shed until picked up for transport and shipped to NAL in Pine Creek, Northern Territory, for standard fire assays. At the lab, the samples are pulverized and split down to 50-gram assay samples prior to assaying. The industry-standard 3 assay-ton fire assay is followed by an atomic absorption (AA) finish, except where results report a result of greater than 3 g Au/tonne, and then a gravimetric finish is used to report final results.


The QP is satisfied that sample security measures meet industry standards. Statistical analysis of the various drilling populations and QA/QC samples has not identified or highlighted any reasons to not accept the data as representative of the tenor and grade of the mineralization estimated at the Batman deposit.


About Vista Gold Corp.


The Company is a gold project developer. Our principal asset is our flagship Mt Todd gold project in Northern Territory, Australia. Mt Todd is the largest undeveloped gold project in Australia.


Posted July 15, 2021

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