Zinco Expands Exploration From San Juan Through to San Rafael, Cuale District, Jalisco VMS Project, Mexico
31 May 2011 - 4:35AM
Marketwired
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 166
degrees /45 degrees 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 Penoles (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.
NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES
PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX
VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR
ACCURACY OF THIS NEWS RELEASE.
Contacts: Zinco Mining Corporation David Elgee President (604)
507-2181 (604) 507-2187 (FAX) www.zincomining.com
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