Meridian Defines Base Metal Anomalies in Brazil
Meridian Defines Base Metal Anomalies in
Brazil
LONDON
,
Nov. 8, 2018
/CNW/ - Meridian Mining SE (TSXV: MNO) ("Meridian" or the "Company")
today announced that its recent technical reviews of its exploration and production databases have
identified base metal anomalies within its Espigão do Oeste District tenements ("Espigão or the
Project"), in the state of Rondônia,
Brazil
.
The Espigão manganese oxide ("MnOx") mineralisation is accompanied by a diverse assemblage of
accessory metals, including: Copper ("Cu"), Lead ("Pb"), Zinc ("Zn") and Cobalt ("Co") (Table 1)
have been recorded. The metal distribution is clustered, with the southern areas carrying a lower
base metal budget, and the northern structures being richer in lead and copper (Fig. 1). Additional
modelling of the Company's aeromagnetic data will be initiated to better define the subsurface
geology. Anomalous gold mineralisation which exploits the same structural network is also present.
The Company will integrate these modelling results with its existing conductivity and radiometric
data, to better understand the intrusive centre associated with the Espigão MnOx mineralisation and
polymetallic anomalies.
The recent technical review follows restructuring and has involved the Company's Chief Geologist,
Dr
Adrian McArthur
, and independent consultant Mr. Marcelo Batelochi and Dr
John Waghorn
. Mr.
Batelochi has more than twenty years of experience in the mineral resource evaluation for Iron,
Copper/Gold, Nickel, Bauxite/Kaolin, Lead/Zinc, REE and PGE deposits. Dr
John Waghorn
holds a
PhD concerning tin granites of Rondônia and has over 40 years of experience in
South America
. The
Company conducted this technical review to evaluate its exploration model, to identify key issues
and opportunities within Espigão and to identify the highest value targets for future exploration
campaigns.
The recent appraisal of all available data indicates that the metallogenic model most appropriate is
one of a polymetallic intrusive-related system, based on the following criteria:
The granites in the Espigão area show fractionation trends, with a centrally-located body, and a
northern corridor, being associated with a more evolved phase. This phase shows positive
lithogeochemical indicators for metal concentration;
The manganese occurrences show a spatial relationship to this central fractionated intrusive
complex. It is marked by a distinct radiometric signature (high total-count / high Thorium - a
characteristic of metal rich granites in the region);
The manganese veins themselves show a zoned distribution of accessory elements (such as
lead, copper, cobalt, phosphorous, zinc, lanthanum), reflecting metal partitioning processes. In
such systems, metals can be partitioned both laterally and vertically with changes in
temperature and pressure; and
Hydrothermal haematite breccias hosting internal clasts with re-action rims have been
intercepted by diamond drilling at multiple sites; such as the Gracioso Prospect (Fig. 2; Table
2). Recent mapping has also identified new areas with silicification, altered granites and
stockwork veining to follow up on.
Mr Clark Interim CEO & President, states, "
The Company is very pleased by the work of its
geological team lead by Dr. McArthur and supported by an independent review, in unlocking this
exciting base metal potential at Espigão. This recently completed review, initiated at the end of
June, looked at the larger relationships of Espigão's data: geology, geochemistry and geophysics.
This has laid the first steps to exploring along the flanks of the geophysical anomaly for additional
MnOx mineralisation and potentially metal rich zones. Similar intrusive related systems have been
defined in locations such as the Tasmanides of
Eastern Australia
, the Gawler Craton in
South
Australia
, and more recently within the broader Amazon Craton Tectonic Province."
Local Controls and Metal Distribution Technical Note
The distribution of mineral occurrences of the Espigão are show in Figure 1, in relation to "Total
Count" radiometric signature. The metal occurrences are developed along structural corridors,
trending E, ENE and NE, with subsidiary trends to the NW. The core of the project area is occupied
by an ovoid cluster of radiometric "highs". It has become apparent during the course of recent
mapping and mining that some of the more significant metal-bearing structures show an intimate
association with the immediate flanks of the main central body. An ENE trending corridor (
Eduardo
Mendes
– Vitalino structure) is offset to the north, and a separate metal cluster is developed in the
Jaburi area to the south. Pan-concentrate stream sediment sampling has identified two gold-
anomalous areas located to the east and west of the central intrusive body, and areas also detrital
cassiterite in the drainage systems. The radiometric pattern coupled with field observations indicates
a variety of granite types. Variable redox states, coupled with changing temperature and pressure
gradients, are considered responsible for the zoned metal assemblages at the Project.
The manganese veins themselves locally exhibit low-level gold anomalism. An example is seen at
Antonio Gomes on the flank of the central zone where samples run up to 0.11 g/t Au. Gold analyses
have not been conducted on all of the Mnox veins, the known breccia zones and corridors of quartz
veining and silicification. These corridors warrant additional sampling and mapping programs to
scope zonal patterns in the distribution of both base and precious metals.
The subsurface three-dimensional architecture of the project is not well known. The presence of
pegmatite plugs, particularly to the east, may suggest that the more evolved granite may extend
beneath or underpin other parts of the project area at depth. Additional modelling of the magnetics,
coupled with other electrical geophysical methods, will assist in defining the interface between
granite types, and potentially the more metal-rich zones; which may focus the metals.
Figure 1: Distribution of manganese oxide mineralisation over CPRM “Total Count” radiometric data,
along with gold and tin anomalies defined by pan concentrate stream sampling. (CNW
Group/Meridian Mining S.E.)
Peak Metal
Max. Assay
Site
Collar
Dip / Az
Comment
Pb
6.56%
DDH_EM_001
Eduardo Mendes
755252
8732003
-60/316
Within broad breccia zone intersecting 32.25m @
9.4% Mn, 0.99% Pb, 0.09% Cu
including 4.75m @ 29.08%Mn, 3.94% Pb, 024% Cu.
Cu
0.62%
DDH_EM_003
Eduardo Mendes
755174
8731973
-59/330
Part of zone of 4.5m @ 30.96% Mn, 2.32% Pb, 0.42%
Cu. Set in broader low grade stockwork halo.
Zn
(in flanking Fe-Mn zone)
0.26%
DDH_MR_004
Marafon
775676
8722719
-50/160
Located in a ferruginous strike extension laterally
flanking Marafon manganese vein: 5m @ 12% Fe,
0.15% P2O5, 0.17% Zn, 0.43% Mn.
Zn
(in Mn vein)
0.18%
DDH_TOM_002
Tomeleiro
760880
8717325
-60/180
Vein on flank of Mn stringer zone: 0.35m @ 31.4%
Mn, 0.18% Zn,
0.11% Cu, 650ppm Pb
Co
0.11%
TR_ADC_103
Ademir Califórnia
750335
8729472
-1/350
Seen in Mn stringer interval: 0. 15m @ 15.0% Mn,
0.11% Co, 607 ppm Cu
Au
(Peak in Mnox)
0.11 g/t
DDH_AG_003
Antônio Gomes
745775
8723526
-49/002
Present in an interval 2.32m @ 15.1% Mn, 012%
Pb, 0.07% Cu.
Au
(in E. gold domain)
23.52 g/t
TR_CC_031 - TR_CC_033
Coice de Cobra
761428
8721135
0/336
28m @ 0.8gJt including 0.5m @ 23.SgJt Au and
0.5m @ 9.1g/t Au in trenching.
Spatially separate to the manganese structures,
but system exploits the same E-W - NE fracture
network
Table 1: Examples of diverse district metal associations. Intersections for the inclined DDH-series
holes are estimated to be at least 50 - 65% of the downhole thicknesses. Trench results (TR
series) approximate true widths.
Figure 2: Simplified map of metal domains on tilt-derivative greyscale magnetics. (CNW
Group/Meridian Mining S.E.)
Hole-id
Collar
Target
Dip/Az
Comment *
DDH_GR_001
749464 E
8717840 N
Gracioso
-50/325
Peak zone of brecciation and
overprinting alteration 108.1 - 111m,
within a much broader network of
hematitic vein arrays
DDH_VJ_001
750610 E
8720478 N
Valmir
-51/000
Strong iron enrichment zones 98.8 -
118.8m; 149 - 160m (EOH - open)
DDH_VJ_002
750713 E
8720477 N
Valmir
-49/325
Strong iron enrichment zones 100.3 -
105.4; 114.4-141 m
* All intercepts shown above are down-hole intercepts. True thicknesses of the metal or alteration
intersections are estimated to be at least 65% of the downhole thicknesses.
Qualified Person
The technical information about the Company's exploration activity has been prepared under the
supervision of and verified by Dr.
Adrian McArthur
(B.Sc. Hons, PhD. FAusIMM), the Chief Geologist
of Meridian, who is a "qualified person" within the meaning of National Instrument 43-101.
On behalf of the Board of Directors of Meridian Mining SE
Gilbert Clark
Interim CEO, President and Director
ABOUT MERIDIAN
Meridian is a manganese producer focused on responsible mining practices, looking to create
sustainable value for its stakeholders by growing its high quality manganese assets that it owns in
Espigão do Oeste,
Brazil
.
Further information can be found at
www.meridianmining.co
.
FORWARD-LOOKING STATEMENTS
Some statements in this news release contain forward-looking information or forward-looking
statements for the purposes of applicable securities laws. These statements include, among others,
statements with respect to the Company's plans for exploration and development of its properties
and potential mineralisation. These statements address future events and conditions and, as such,
involve known and unknown risks, uncertainties and other factors, which may cause the actual
results, performance or achievements to be materially different from any future results, performance
or achievements expressed or implied by the statements. Such risk factors include, among others,
failure to obtain regulatory approvals, failure to complete anticipated transactions, the timing and
success of future exploration and development activities, exploration and development risks, title
matters, inability to obtain any required third party consents, operating hazards, metal prices,
political and economic factors, competitive factors, general economic conditions, relationships with
strategic partners, governmental regulation and supervision, seasonality, technological change,
industry practices and one-time events. In making the forward-looking statements, the Company
has applied several material assumptions including, but not limited to, the assumptions that: (1) the
proposed exploration and development of mineral projects will proceed as planned; (2) market
fundamentals will result in sustained metals and minerals prices and (3) any additional financing
needed will be available on reasonable terms. The Company expressly disclaims any intention or
obligation to update or revise any forward-looking statements whether as a result of new
information, future events or otherwise except as otherwise required by applicable securities
legislation.
The Company cautions that it has not completed any feasibility studies on any of its mineral
properties, and no mineral reserve estimate has been established. In particular, because the
Company's production decision relating to Meridian Mineraçao Jaburi S.A, manganese project is not
based upon a feasibility study of mineral reserves, the economic and technical viability of the
Espigão manganese project has not been established.
The TSX Venture Exchange has neither approved nor disapproved the contents of this news release.
Neither 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
release.
NOTES
Drilling and trench samples have been analysed by an accredited SGS Laboratory in
Belo
Horizonte, Brazil
. Samples are dried, crushed to 3 mm, homogenised, then a split is pulverised to
produce a pulp of 250 - 300 g with 95% passing 150 mesh. Submissions include certified
references to monitor laboratory performance, which have returned results within the expected
laboratory analytical error margins. Laboratory protocols include blanks, duplicates and repeats.
Major oxides in mineralised zones are analysed by lithium-borate fusion - XRF techniques, with
minor elements in zones of mineralization and wall rock alteration analysed by multi-acid digest
and ICP-OES analysis.
Surface stream anomalies have been defined by a pan-concentrate program with positive gold and
cassiterite gold results cross-checked by mineralogical reports at SGS Laboratories in
Belo
Horizonte
. The drainage sampling is collected in a 20 liter bucket of alluvium from the lower level
of a stream channel, and provides a qualitative indication of the presence of metal sources in the
catchment areas. Evaluation of bedrock sources by soil geochemistry, trenching, drilling in source
areas is accompanied by analysis by SGS method FAA323 (fire assay of 30g charge).
Until dispatch, samples are stored in the company's supervised stockpile yard or exploration office.
The samples are couriered to the assay laboratory using a commercial contractor (Eucatur). Pulps
and rejects are returned to the Company and archived.
SOURCE
Meridian Mining S.E.
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CNW 09:58e 08-NOV-18