El Nino Releases Phase 1 Metallurgical Results for the Murray Brook Base Metal
Deposit, Bathurst Mining Camp, New Brunswick
VANCOUVER, Jan. 16, 2013 /CNW/ - El Nino Ventures Inc. ("ELN" and the
"Company") (TSX.V: ELN; OTCQX: ELNOF Frankfurt: E7Q) is pleased to announce
the results from Phase 1 metallurgical testwork commissioned by its partner,
Votorantim Metals Canada Inc. (Votorantim), on samples from the Murray Brook
polymetallic deposit, located in the Bathurst Mining Camp, New Brunswick. The
purpose of the testwork was to investigate flotation options for sequential
recovery of copper, lead and zinc concentrates from Murray Brook feed.
The metallurgical testwork was completed at RPC Science & Engineering
Laboratories (RPC) in Fredericton (New Brunswick), under the direction of
metallurgists Ross Gilders and Leo Cheung. Further information on RPC may be
found at the laboratories' website at http://www.rpc.ca
Testwork was completed on bulk drill core samples from the Eastern Zone and
from the Western Zone of the Murray Brook deposit (Figure 1; Table 1). The
test program consisted of sample preparation and compositing,
characterization, and batch flotation tests followed by locked cycle tests on
a composite sample. The composite sample head grade for the testwork is
similar to the grade of the current high confidence Measured resources for
Locked cycle tests by RPC successfully produced individual copper, lead and
zinc concentrates with the following recoveries and grades (Table 2):
-- Recoveries of 51.4% copper, 1.7% zinc, 4.5% lead, and 12.5 %
silver in a copper concentrate grading 17.5% copper, 6.0% zinc,
6.2% lead, and 591 g/t silver;
-- Recoveries of 36.6% lead, 7.2% copper, 1.4% zinc, and 17.5%
silver in a lead concentrate grading 50.3% lead, 2.4% copper,
5.3% zinc, and 833 g/t silver; and
-- Recoveries of 88.8% zinc, 15.8% copper, 8.3% lead and 25.3%
silver in a zinc concentrate grading 53.8% zinc, 0.5% copper,
1.1% lead, 95 g/t silver.
A copy of the report is available for viewing on the Company's website.
Additional metallurgical work has been commissioned by Votorantim and RPC,
which involves completing expanded and extended locked cycle tests to optimize
copper, lead and precious metal recoveries in support of a planned Preliminary
Economic Assessment in 2013.
Harry Barr, Chairman & CEO states: "The results of the Phase 1 metallurgical
testwork on Murray Brook are encouraging, particularly the 89% zinc recovery
combined with good silver recovery. These initial metallurgical results plus
the results of 18,500 metres of drilling completed since 2011 and the resource
estimation of February 2012, confirm the robustness of Murray Brook as this
well-located project is steadily advancing towards the planned completion of a
Preliminary Economic Assessment in H1 2013."
The sample materials were derived from three HQ size drill cores (Table 1).
Hole MB-2012-121 was drilled in the Eastern Zone, the shallower and more
copper-rich of the two massive sulfide zones at Murray Brook. Holes
MB-2012-124 and MB-2012-132 were drilled in the deeper, more
zinc-lead-precious metal rich Western Zone. (Description and assay results for
each of the three holes are provided in ELN press releases dated July 30,
August 14, August 28, 2012). The drill core was logged, split, sampled and
shipped to RPC. Intervals of potential secondary mineralization and fracturing
were sampled separately. In total 3226 kg of material was delivered to RPC
Figure 1. Massive Sulfide Thickness, 10 metre contours
contour map of Murray Brook showing the location of the Eastern Zone and the
Western Zone plus the surface trace of the massive sulfides. Metallurgical
hole MB-2012-121 was drilled in the Eastern Zone. Metallurgical holes
MB-2012-124 and -132 were drilled in the Western Zone.
Table 1. Drill Core Sample Material for the metallurgical Testwork on Murray
| | | |Mass |Mass | Assays/Values | Distribution Ratio% |
| | | | |Dist.| | |
|Description| Zone |Sample |_____|_____|_______________________|_____________________|
| | | | g | % |Cu%|Pb%|Zn%| Ag | Au | Cu |Pb | Zn |Ag |Au |
| | | | | | | | |(g/t)|(g/t)| | | | | |
|MB-2012-121|Eastern|bottom |15908|33.3 |0.5|1.0|1.9| 42 |0.906| 60 |27 | 148|31 |52 |
|MB-2012-124|Western|bottom |15908|33.3 |0.2|0.8|2.9| 35 |0.263| 23 |24 |28.4|26 |15 |
|MB-2012-132|Western| whole |15908|33.3 |0.1|1.7|5.5| 59 |0.591|17.0|49 |53.2|435|34 |
|Summary results: average or|47724| 100 |0.3|1.2|3.4| 45 |0.590|100 |100|100 |100|100|
| total as appropriate | | | | | | | | | | | | |
| Measured* | both |average| | |0.3|1.2|3.5| 44 |0.500| | | | | |
| Meas+Ind* | both |average| | |0.4|1.0|2.6| 39 |0.510| | | | | |
*Grade of current Measured and Measured + Indicated resources (see Technical
Report on www.elnventures.com)
Table 2.Assay and Recovery Results of Locked Cycle Tests for Murray Brook
| | | Assays | Recovery% |
| | | Cu% | Pb% | Zn% | Ag | Au | Cu | Pb | Zn | Ag |Au |
| | | | | |(g/t)|(g/t)| | | | | |
|Feed Grade | blend of 3 |0.27 |1.15 |3.42 | 45 |0.590| | | | | |
| | holes | | | | | | | | | | |
| Cu | final |17.45|6.16 |6.04 | 591 |1.051|51.4|4.5 |1.7 |12.5| 2 |
|Concentrate| | | | | | | | | | | |
| Pb | final |2.40 |50.30|5.27 | 833 |0.923|7.2 |36.6|1.4 |17.5|1.8|
|Concentrate| | | | | | | | | | | |
| Zn | final |0.48 |1.08 |53.78| 95 |0.360|15.8|8.3 |88.8|25.3|5.5|
|Concentrate| | | | | | | | | | | |
Composite samples for each of the three Murray Brook drill holes were
submitted for grindability test work. Rod Mill Grindability Indices for the
Murray Brook bulk sample materials averaged 14.6 kWh/t with a hardness
percentile of 55%. Bond Ball Mill Grindability Indices averaged 10.7 kWh/t
with a hardness percentile of 10%. These data suggest that Murray Brook
mineralization is of moderate hardness for a rod mill and lower hardness for a
SEM-EDS mineralogical studies of the overall composite sample and each
individual drill core by RPC indicate that sphalerite and galena occur as
interstitial grains, inclusions, veinlets and attachments to pyrite.
Chalcopyrite occurs as interstitial grains to pyrite. Chalcopyrite is less
common hole MB-2012-132, consistent with the lower copper grades in the
Western Zone. Covellite is present in MB-2012-124. Generally, the
principal silver mineral is tetrahedrite. The sulfide grains are mainly 20
µm in size. However, sphalerite grains 50-100 µm in size are present
interstitial to pyrite grains.
Primary bulk sulfide rougher floats were carried out to estimate flotation
performance. The reagent regime included 400 g/t CuSO(4), pH 10.0-10.5, 33.3
g/t 3418A, 10g/t PAX, 15 g/t MIBC and 11 minutes total at 1250 rpm. Rougher
target liberation grind size was established to be D80 of ~30 µm. Initial
testwork found that flotation performance was adversely affected by the
presence of secondary (oxidized) material. This latter material therefore was
excluded from the overall composite sample used in locked cycle testing.
Additional metallurgical testwork is planned to be carried out by RPC in early
2013. The results will be reported in a planned Preliminary Economic
Assessment to be completed in Q1 2013. The additional testwork will focus on
optimizing copper, lead and precious metal recoveries, in part through
processing of larger samples in bigger equipment. An expanded metallurgical
test program, including pilot plant testing, may be warranted if PEA studies
Qualified Persons Statement
This news release has been reviewed and approved for technical content by Ali
Hassanalizadeh M.Sc. P.Geo., a qualified Person under the provisions of
National Instrument 43‐101.
About El Niño Ventures Inc. Bathurst Projects
El Niño Ventures Inc. has two active projects in the Bathurst Mining Camp;
1. Murray Brook Project
The Murray Brook project is a polymetallic, massive sulfide deposit and is the
fifth largest deposit discovered to date in the Bathurst Mining Camp, New
Brunswick. The Murray Brook property is located 60 km west of Bathurst. It
is supported by excellent infrastructure, including paved roads, grid
electricity and communities to provide goods, services and skilled labour.
A $3 million exploration budget was approved for the 2012 exploration program.
It included $2.5 million for drilling to bring resources into the measured
category at the Murray Brook deposit and $500,000 for exploration of the
Murray Brook and Camel Back properties, both of which are covered by the
option agreement with Murray Brook Minerals. To date, more than 28,000 metres
of drilling has been completed with encouraging results. In February 2012,
an NI43-101 compliant resource estimation was announced (see news release. The
technical report is filed on SEDAR.com and also available on ELN's website. An
updated NI43‐101 mineral resource estimation and metallurgical test results
are slated for completion in the first quarter of 2013. Results of these will
be incorporated in a Preliminary Economic Assessment "PEA" that is slated for
completion in the first quarter of 2013.
ELN and VMC currently own 70% of the project, of which 35% is held by each of
the two parties. Under a purchase agreement signed by VMC on August 28, 2012
with MBM and Murray Brook Resources Inc. (collectively the owners), VMC
acquired the right to purchase the additional 30% of the Murray Brook Project
from the owners. ELN has been provided the option to purchase an additional
15% in the project for a combined total of 50% (35% +15%).
Although the terms of the Participation Agreement provided for a three-year
period to earn the initial 50% and two years to earn the additional 20%, ELN
and VMC completed their earn-in in less than 18 months.
2. Bathurst Option Joint Venture Project (BOJV)
Consists of an initial 4,712 claims in the Tri‐Party Agreement with Xstrata
& VM Canada whereby VM Canada may incur exploration expenditures of $10
million over a period of 5 years to earn a 50% interest. VM Canada may further
increase its interest to 70% by spending an additional $10 million over 2
Votorantim Metals Canada Inc. Statement
Technical details in this news release were provided by Votorantim whose
professional geologists conduct operations consistent with mineral industry
best practices. Votorantim accepts no responsibility for this news release.
About Votorantim Metals Canada
Votorantim Metals Canada Inc. is a subsidiary of Votorantim Metais, a company
that is part of the Votorantim Group that was founded in Brazil in 1918. The
Votorantim Group operates in twenty countries and has over 40,000 employees.
Votorantim Metais is the largest electrolytic nickel producer in Latin America
and one of the world's leaders in the production of zinc, aluminum and
nickel. Votorantim Canada Metals Inc. in conjunction with Xstrata Zinc and
El Nino Ventures is operator of the Bathurst Option and Joint Venture which is
actively exploring for base metal deposits within the Bathurst Mining Camp.
About El Nino Ventures Inc.
El Niño Ventures Inc. is an international exploration company, focused on
exploring for lead, zinc, copper, gold and silver in New Brunswick, Canada and
copper in the Democratic Republic of Congo ("DRC").
On Behalf of the Board of Directors
(signed) Harry Barr
Chairman & CEO
El Niño Ventures Inc.
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term is defined in the policies of the TSX Venture Exchange) accepts
responsibility for the adequacy or accuracy of this release.
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SOURCE: El Nino Ventures Inc.
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