Zinco Mining Corporation
TSX VENTURE : ZIM
FRANKFURT : 61Z

Zinco Mining Corporation

May 30, 2011 14:35 ET

Zinco Expands Exploration From San Juan Through to San Rafael, Cuale District, Jalisco VMS Project, Mexico

VANCOUVER, BRITISH COLUMBIA--(Marketwire - May 30, 2011) - Zinco Mining Corporation (TSX VENTURE:ZIM) (FRANKFURT:61Z) is pleased to announce that the 2011 exploration program of the Cuale volcanogenic massive sulfide prospects is underway. Company personnel are on the property, drill sites have been prepared and Major Drilling de Mexico S.A. de C.V. is in the process of moving equipment onto the Cuale property to begin the diamond drilling program announced on 10 May 2011. Additionally, the Company has completed out additional surface and underground mapping and sampling of the San Rafael prospect, located two kilometers east of San Juan on the eastern flank of Cerro Descubriadora.

Geological mapping at San Rafael shows that mineralization preferentially occurs in thinly bedded rhyolite tuff, at or near the contact with an underlying rhyolite flow-dome complex. This is the same geologic horizon as the San Juan deposit. In addition, the geochemistry of San Rafael is similar to that of San Juan. Both prospects are characterized by elevated values of silver, arsenic, antimony and barium, as well as lead and zinc. Zinco is using a field portable NITON GOLDD XRF gun for in-situ field analyses of outcrops and rock samples (see below). Select samples are to be followed up with laboratory assaying.

San Rafael was clearly a significant historic prospect based on the size of the rock dumps and the number of underground and open pit workings. In the central part of the deposit area, there are the ruins of a stone building 2 meters wide by 3 meters long. The rock dumps are located in a flat area 130 meters long by 180 meters wide immediately north of the building. The NITON GOLDD XRF gun was used to measure a sample of massive barite with sphalerite from this main dump with a result of 29.0% Ba, 20% Zn, 7.7% S, 3.9% Fe, 8% Pb, 3585 ppm As, 1170 Sb and 1089 ppm Ag (sample 29976). Several well-built 1 meter wide trails provide access to mine workings surrounding the building, as well as the beneficiation plant in the creek about 500 meters below and east of San Rafael.

The principal mineralized zone at San Rafael is exposed by several underground workings and prospect pits 170 meters northeast of the building between 1830 and 1810 meters elevation. Mineralization is completely oxidized, and consists mainly of weathered barite with goethite. The average NITON XRF analysis of 3 chip channel samples across different parts of this gossan is 39% Fe, 29% Ba, 5.3% S, 2.7% V, 0.2% Zn, 0.2% Pb, 0.1% Ni, 0.08% Cu, 411 ppm As and 254 ppm Sb (samples 25859, 61 and 62). The XRF also indicates that this gossan contains significant quantities of gold, but this was not apparent in panned concentrate, so evaluation of the gold potential will depend on fire assay methods. A sample of fresh mineralized rock from a dump outside one of the caved workings contains 49% Ba, 11% S, 6% Fe, 3% V, 5868 ppm Pb, 3734 ppm Sb, 1211 ppm Ni, 976 ppm As, 507 ppm Cu and 270 ppm Ag (sample 29978).

A second important zone at San Rafael outcrops 60 meters southwest of the building at 1850 meters elevation. Here, there is a small stope that follows a VMS sulfide-sulfate zone oriented 166º/45º WSW. A (weathered) sample cut across a pillar near the surface yielded results of 3.6% Fe, 1.3% Ba, 6831 ppm S, 2621 ppm V, 2130 ppm Pb, 1042 ppm Sb, 878 ppm Cu, 739 ppm As and 306 ppm Ag across 1 meter (sample 26272). Below the historic workings, at 1825 meters elevation, Industrias Peñoles (the previous owner) built an adit 70 meters long oriented NW that cut through the old stope and exposed the VMS body, showing very clearly thin sulphide-sulfate laminations parallel to bedding. Sample 25855, cut across the laminations, contains 2.9% S, 2% Ba, 1.7% Pb, 3901 ppm Fe, 3623 ppm Zn, 2076 ppm V, 1163 ppm Ag, 793 ppm Cu, 679.4 ppm As, and 594 ppm Sb across 2 meters. Overall, the VMS horizon has a true width of about 9 meters, but some of the exposure in the back of the cross-cut is loose, and was not sampled for safety reasons.

Qualified Person

This press release was reviewed by Michelle Robinson, M.A.Sc., P.Eng., a Director of Zinco Mining Corporation, who acts as Zinco's qualified person as defined by NI 43-101. In-field assaying procedures using the NITON GOLDD XRF gun are as follows:

  • Prior to starting a traverse (or sample run), the NITON XRF gun is calibrated using its internal calibration procedure, and double checked using a standard rock pulp with known values for Ag, Pb and Zn. The instrument measures 43 elements, including most of the metals of economic interest in the VMS environment, as well as Si, Al, K, Ca, Ba, S and Mg. These elements are useful for identifying alteration zones.

  • Prospective rock outcrops are cleared of moss and surface oxides using a rock pick or hammer and chisel and numbered.

  • The prepared outcrop is analyzed for 80 seconds (20 seconds per filter) using the NITON XRF gun.

  • A GPS field location with the same number is recorded at the site. The in-situ assays and site locations are merged into a "Surface_XRF" data file.

  • If the result is interesting, a numbered chip-channel sample, preferably across the structure of the zone of interest may be cut using a hammer and chisel. The orientation data and geological characteristics are recorded. Some rocks are analyzed for alteration characterisics only.

  • In camp, the fine fraction of the rock samples are collected by shaking them down to the bottom of the bag, and analyzed for 80 seconds using the XRF gun. While the homogenization process is not rigorous, it is fast and is good enough to identify the high-contrast geochemistry that is typical of the VMS environment. It also avoids any contamination that could occur by sieving the sample outside its bag. The samples are sealed in a double-bag, and selected samples sent for further laboratory assaying. Between samples, the business end of the gun is wiped with a soft rag.

  • The NITON XRF gun is used in a similar fashion for in-field control of the diamond-drilling campaign.

Further information about the Jalisco VMS Project can be reviewed on Zinco's website www.zincomining.com

ON BEHALF OF THE BOARD,

David Elgee, PRESIDENT

Certain information regarding the Company including management's assessment of future plans and operations, may constitute forward-looking statements under applicable securities laws and necessarily involve risks associated with mining exploration and development, volatility of prices, currency fluctuations, imprecision of resource estimates, environmental and permitting risks, access to labour and services, competition from other companies and ability to access sufficient capital. As a consequence, actual results may differ materially from those anticipated in the forward-looking statements.

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Contact Information

  • Zinco Mining Corporation
    David Elgee
    President
    (604) 507-2181
    (604) 507-2187 (FAX)
    www.zincomining.com