Focus drills 169g/t Ag + 7.8% Zn + 8.3% Pb over 10.8m at Santa Rosa, Peru
VANCOUVER, Oct. 12, 2011 /PRNewswire/ – Focus Ventures Ltd. (TSX-V: FCV) is
pleased to report assay results from the first three diamond drill
holes from its Santa Rosa Ag-Pb-Zn project, located 100km northeast of
Lima, Peru. The best intercept returned was 169 g/t Ag + 7.8% Zn + 8.3%
Pb over 10.8m from 162m downhole in hole DDH-11-03.
This preliminary drilling is designed to test beneath the Ag-Zn-Pb
mineralization exposed in the Santa Rosa and Milagros-Sally underground
All three holes intersected mineralization which is as yet poorly
constrained and open to depth in both Santa Rosa and Milagros-Sally.
Drilling cut significant intervals of disseminated/fracture-controlled
mineralization and narrower intervals of more massive, high grade
replacement-style mineralization hosted in a sequence of brecciated
quartzites and fine grained clayey sediments belonging to the
Cretaceous-aged Chimu Formation. The sulphide mineralogy is simple,
with sphalerite and galena accompanied by pyrite, and associated with
quartz and minor chalcopyrite.
Holes SR DDH-11-01 and SR DDH-11-02 were drilled from the same platform
and were angled underneath the Santa Rosa and Milagros areas
respectively. Hole DDH-11-03 was drilled on a separate platform 70m to
the northeast and tested underneath the Santa Rosa workings.
Results from Hole DDH-11-04 are awaited, which was drilled 140m west of
the first platform also under the Milagros-Sally workings. Hole
DDH-11-05 is located some 260m to the south of Milagros-Sally to test
the Santa Rosa Sur target and is in progress.
Santa Rosa Target
Hole # From (m) To (m) Length (m) Zn % Pb % Ag g/t SR DDH-11-01 38.1 39.5 1.4 8.4 0.5 20.0 144.8 147.7 2.9 4.4 0.4 14.6 147.7 151.9 4.2 No recovery - old workings 159.5 161.3 1.8 2.9 4.9 113.4 SR DDH-11-03 155.5 156.7 1.2 4.0 0.5 17.7 161.9 172.7* 10.8 7.8 8.3 168.6 including 169.9 172.7 2.8 0.2 28.3 526.0
* Poor recovery from 168.4m – 169.9m (69%), and 170.9m – 172.7m (52%)
Hole # From (m) To (m) Length (m) Zn % Pb % Ag g/t SR DDH-11-02 30.8 32.0 1.2 5.3 2.1 25.5 53.0 53.6 0.6 3.6 0.1 9.8 79.0 122.0* 43.0 1.5 0.2 7.7 including 84.3 108.5 24.2 2.2 0.4 11.7 and 98.2 108.5 10.3 3.7 0.1 12.1
* Broken zone from 108.0 -113.9m (43% recovery)
A plan map and drillhole sections will be available on the Focus website
shortly at www.focusventures.com.
DDH-11-01 was drilled at an azimuth of 323 degrees, and -45 degrees
inclination and targeted underneath Level 4267 at Santa Rosa. The hole
azimuth deviated during drilling which meant the hole ended up at least
10m to the west of the intended target at around 145m depth where it
encountered underground workings and core loss. A 2.9m interval of
quartzite-hosted mineralization was drilled from 144.8m to 147.7m and
assayed 4.4% Zn, 0.35% Pb and 14.6 g/t Ag, before passing through
underground workings on Level 4267 from 147.7m to 151.9m.
Disseminated, low grade mineralization (<1% Zn) was intercepted in a
sequence of fine grained andesitic tuffs with quartz-pyrite stockworks
immediately below the void which assayed a wide 30.5m intercept grading
0.3% Zn + 0.32% Pb + 9.8 g/t Ag to 182.4m. It is believed better grades
could be present below this volcanic unit where the same structural
zone cuts the quartzites. A fault contact with the quartzites was
drilled from 174.9 – 178.4m and pyritized quartzites were drilled until
the hole was terminated at 227.9m.
DDH-11-02 was drilled from the same platform as DDH-11-01 at an azimuth
of 257 degrees at a -45 degree angle and west underneath the
Milagros-Sally underground workings. The hole encountered several veins
hosted byandesitic volcanics in the upper part of the hole. From 47.6m
to 124.0m a sequence of mineralized hydrothermal breccias were drilled
in silicified and pyritized quartzites and pelitic sediments.
Sphalerite and galena occur with pyrite in a variety of forms namely
breccia infill around quartzite clasts, fracture/veinlets with quartz,
fine disseminations and massive sulphide. A 59m interval from 63.0 to
122.0m graded 1.2% Zn, 0.2% Pb, 6.6 g/t Ag. Zinc grades are fairly
consistent down the hole, although slightly stronger mineralization
occurs toward the base of the interval (10.3m @ 3.7% Zn from 98.2m to
108.5m) prior to a major fault (which may be the main controlling
feeder fault). The hole was lost at 146m due to bad ground.
DDH-11-03 targeted underneath the Santa Rosa workings and drilled at an
azimuth of 258, inclined at -45 degrees to test the high grade
mineralization sampled in the northeastern part of the underground
workings. A sequence of mineralized hydrothermal breccias hosted in
sandstones and quartzites were drilled from 155.1m to 178.4m. A higher
grade interval of semi-massive sphalerite and galena with quartz
veinlets was drilled from 161.9m – 172.7m and assayed 7.8% Zn, 8.3% Pb
and 168.6 g/t Ag over 10.8m, and consisted of an upper zinc rich and a
lower lead-silver rich zone. Of note are the high silver assays, up to
1,040 g/t Ag (169.9m – 170.9m) associated with massive galena
mineralization. A footwall fault/gouge zone consisting of milled
quartzite fragments and clays was drilled from 175.9m – 178.4m, after
which massive quartzites were drilled to the end of the hole at 213.5m.
Comments & Interpretation
The disseminated/fracture-controlled quartzite-hosted zinc
mineralization drilled at Milagros-Sally is unusual in the District.
The mineralization is blind at surface due to overlying Tertiary-age
andesites of the Calipuy Formation, and is open to the south and west.
The potential to find additional bulk tonnage mineralization is
believed to be high.
The high grade, massive sphalerite-galena mineralization drilled in
DDH-11-03 at Santa Rosa occurs within the hangingwall of a northeast
trending fault which forms a wider splay to the southwest dominated by
stockwork mineralization over an area of approximately 30m x 40m. The
zone has been mined almost to surface and is open at depth. Thick
intervals of brecciated quartzites, drilled in all three holes, are the
best host rocks for mineralization. Drilling from surface at Santa Rosa
is challenging due to the nature of the host rocks and the underground
workings, and further evaluation should be by underground drilling.
The Santa Rosa property is located within the prolific Central Peru
Polymetallic Belt, at an altitude of between 4,000m and 4,500m above
sea level. Several world class silver, lead and zinc mines owned by
major operators such as Pan American Silver, Buenaventura, Glencore and
Volcan lie within a 50km radius of the property. Volcan, the world’s
fourth biggest silver and zinc producer, operates the high-grade Shalca
Ag-Pb-Zn Mine which borders the Santa Rosa property on the northern end
of the mineralized corridor.
The property underwent some small scale production in 2008, where ore
grading 6 oz/t Ag, 8.75% Zn and 6.6% Pb was mined exclusively from the
Santa Rosa and Milagros zones.
Focus can earn 100% of the property by making cash payments totaling
US$9 million over 4 years to a local Peruvian company. For resources
defined in Measured and Indicated categories in excess of 5 million
tonnes, a royalty of US$1.19 per tonne will be payable.
The scientific and technical information in this release was prepared
under the supervision of Mr. David Cass, Focus’s President, who is a
member of the Association of Professional Engineers and Geoscientists
of British Columbia, and a “Qualified Person” in accordance with NI
Sampling Quality Analysis and Quality Control
Core was first split in half using a diamond core splitter and then
logged, and each box photographed prior to sampling. Half-core samples
were bagged, security-sealed and transported by Focus personnel to ALS
Chemex laboratories in Lima for analysis. Lead and zinc were determined
by ICP with Atomic Absorption with volumetric finish. Silver was
determined by multi-acid digestion and ICP-AES, with fire assay
gravimetric finish. Quality control by Focus involves the insertion by
Focus personnel of blind certified standards and blanks into the sample
stream at regular intervals in order to independently assess analytical
precision and accuracy of each batch of samples as they are received
from the laboratory. Finally, representative sample pulps are forwarded
to an ISO-compliant third party laboratory for additional quality
control. ALS Chemex’s quality control system complies with
International Standards ISO 9001:2000 and ISO 17025:2005. Analytical
accuracy and precision are monitored by the analysis of reagent blanks,
reference material and replicate samples.
About Focus Ventures
Focus Ventures is acquiring advanced, drill-ready projects in Peru and
Mexico. Backed by an experienced technical team of geologists and
consultants, Focus’s strategy is to identify and acquire former
producing mines or untested gold and silver and base metal properties
that show potential to become new mines.
ON BEHALF OF THE BOARD
David Cass, President
Contact: Erin Ostrom / Ralph Rushton
Shares Issued: 29.3-million
Neither the TSX Venture Exchange nor the Investment Industry Regulatory
Organization of Canada accepts responsibility for the adequacy or
accuracy of this release.
Some of the statements in this news release contain forward-looking
information that involves inherent risk and uncertainty affecting the
business of Focus Ventures Ltd. Actual results may differ materially
from those currently anticipated in such statement.
SOURCE Focus Ventures Ltd.