Mirasol Progresses Indra Epithermal Precious Metal Project in Northern Chile
NEWS RELEASE
Suite 910 - 850 West Hastings Street, Vancouver, B.C. Canada, V6C 1E1
Tel: +1 604 602 9989 Fax: +1 604 609 9946 E-mail: [email protected]
www.mirasolresources.com
Mirasol Progresses Indra Epithermal Precious Metal Project in Northern Chile
VANCOUVER, BC – August 30, 2018 — Mirasol Resources Ltd (TSX-V: MRZ), (OTCPK: MRZLF), (the “Company”
or “Mirasol”) is pleased to report on progress at the Company’s 100% owned 21,000 ha Indra epithermal
precious metal project, located 5 km south of the 1.37 Moz1 El Guanaco gold mine in northern Chile.
Indra highlights:
• Indra is s ubject to recently announced Letter of Intent for a n option to j oint venture with Hochschild
Mining
• Mirasol’s interpretation suggests the project encompasses the upper levels of a large epithermal
precious system
• The outcropping rocks are of a p rospective geological age, and lie within a favorable structural setting
on the Paleocene Age Mineral Belt
• The project is located at relatively low elevation with year -round access , and is adjacent to mine
infrastructure
• Mirasol and Hochschild are planning a geological mapping, geochemical sampling, alteration vectoring
and ground magnetics program for the southern hemisphere spring and summer (Q4 2018), that will
contribute towards the US$800,000 minimum commitment for the first 18-month exploration program
Letter of Intent
The Indra project is subject to a recently announced Letter of Intent for an option to joint venture with Hochschild
Mining plc (LON: HOC) which, contingent on completion of a successful due diligence by HOC, will grant HOC the
option to earn up to 75% of the project. HOC can elect to make a series of exploration and development
investments at the project, make staged cash payments to Mirasol of US$7 25,000, and at Mirasol’s request
provide production financing for the Company’s retained 2 5% project interest (see news release August 29,
2018). Mirasol will be the operator for the first 18 months, (extendable, at the request of HOC, for a further 12
months), earning a scaled management fee of up to 10% of exploration expenditures.
Indra Project
The Project was staked by Mirasol as an outcome of the Company’s Atacama – Puna Generative exploration
program and encompasses what Mirasol interprets may be the upper levels of a large epithermal Au-Ag system.
Mirasol has identified a limited number of prospect pits at Indra estimated to be from the 1900’s; however, there
is no evidence of modern exploration at the project despite year -round access and location adjacent to an
operating mine.
The Indra project is located in Paleocene Age Mineral Belt of northern Chile. The Belt hosts a number of world
class mines, including Yamana Gold’s El Penon Low Sulfidation Epithermal (LSE) Au–Ag mine (6.95 Moz Au and
188.1 Moz Ag2) and BHP Billiton’s Spence porphyry-copper mine (14 Mt of Cu3).
Indra is localized at the intersection of the Paleocene age volcanic arc with the NW -SE oriented Cul ampaja
structural corridor ( Figure 1). The Culampaja is considered an important crustal -scale, trans-orogen structure
1 S&P Global Market Intelligence
2 S&P Global Market Intelligence
3 S&P Global Market Intelligence
Suite 910 - 850 West Hastings Street, Vancouver, B.C. Canada, V6C 1E1
Tel: +1 604 602 9989 Fax: +1 604 609 9946 E-mail: [email protected]
www.mirasolresources.com
that has influenced the emplacement of many large-scale precious metal and copper deposits in northern Chile
and Argentina, including Gold Field’s recently discovered Salares Norte gold deposit (3.7 Moz Au4), located where
the structure traverses the Mio–Pliocene age mineral belt5, 82 km to the SE of Indra.
The Chilean Government published a regional geological map of the area , including Indra, which confirms the
presence of a prospective Paleocene age rhyolitic flow dome and volcanic complex. The flow domes have been
radiometrically dated at 56.2 M a6. Rhyolite flow domes of a similar age are also known to be associated with
Yamana’s El Penon Au-Ag mine7 located 84 km to the north of Indra. This association suggests a prospective age
for the flow domes and associated alteration system at the Indra project.
The Project hosts the following encouraging prospects (Figure 2):
1) Agni, with a large chalcedony and opal silica alteration system and associated silica - barite structures;
and
2) Indra, with a large carbonate-silica vein and vein-breccia zone.
The Indra vein-breccia outcrops intermittently through thin unconsolidated post-mineral gravels, and has been
mapped for a strike length of more than 7 km before it trends under thicker cover. The vein -breccias widths
range from a few cm up to more than 10 m and are characterized by well-developed colloform and crustiform
textures and brecciation (Figure 3), which are indicative of a high-energy multi-pulse hydrothermal system.
Rock chip sampling of the Indra vein -breccia and the alteration and veining at Agni has retuned low -level
anomalous Au and Ag (max 140 Au ppb and 1,690 Ag ppb) combined with very high levels of As , Sb, Hg, and Ba
epithermal pathfinder elements, as well as strongly anomalous Cu , Pb and Zn (Figure 1). Alteration mineralogy
analysis of the wall rocks hosting the vein-breccias at Indra show an interlayered illite and smectite mineral
assemblage. The ratio of these minerals in the alteration can be used to estimate the approximate depth to the
potentially underlying precious metal interval (Figure 4).
Based on Mirasol’s knowledge of this deposit class and ore deposit models developed from studies of epithermal
deposits in Chile and other parts of the world, Indra is interpreted as representing the upper levels of a large
epithermal system, where high-grade Au-Ag mineralization may be preserved at depth beneath the outcropping
Indra and Agni alteration and vein zones. This interpretation is supported by the presence of “Indra” like
carbonate – silica veining, peripheral to and overlying gold - silver mineralization in the El Penon district 8, and
overlying the ore zone in the multi-million ounce HOC Arcata gold-silver mine in Peru that has produced in-excess
of 390,000 oz Au and 200 Moz Ag9.
4 Gold Fields. (2017). The Gold Fields Mineral Resource and Mineral Reserves Supplement to the Integrated Annual Report
2017.
5 Azevedo, F. et. al. (2015). The Discovery and Geology of the Salares Norte Epithermal Gold-Silver Deposit, Northern Chile,
New Gen Gold 2015
6 Espinoza, F. et. al. (2011). Carta Catalina, Region de Antofagasta, 1:100,000. Carta Geologica de Chile, Serie Geologia
Basica
7 Warren, I. et. al. (2008). Geochronology of epithermal Au-Ag mineralization, magmatic-hydrothermal alteration, and
supergene weathering in the El Penon district, northern Chile. Economic Geology, 103(4), 851-864.
8 Bissig, T. et. al. (2007). Vein carbonates in the low sulfidation epithermal Au -Ag District of El Penon, II Region, Chile:
environment of formation and exploration implications. Revista geológica de Chile, 34(2), 291-303.
9 Candiotti de los Rios, H. et. al. (1990). Geologic setting and epithermal silver veins of the Arcata district, southe rn Peru.
Economic Geology, 85(7), 1473-1490. and Hochschild Mining public prospectus and production reports .
Suite 910 - 850 West Hastings Street, Vancouver, B.C. Canada, V6C 1E1
Tel: +1 604 602 9989 Fax: +1 604 609 9946 E-mail: [email protected]
www.mirasolresources.com
Mirasol and HOC are currently designing the first phase Indra exploration program that will include detailed
geological mapping, rock chip sampling, alteration vectoring studies and ground magnetics. It is anticipated that
exploration will commence at the project in the 4th quarter of 2018.
Stephen Nano, President and CEO of Mirasol, has approved the technical content of this news release. Mr Nano
is a Charter Professional geologist and Fellow of the Australasian Institute of Mining and Metallurgy (CP and
FAusIMM) and is a Qualified Person under NI 43 -101.
For further information, please contact
Stephen Nano
CEO and President
or
Jonathan Rosset
VP Corporate Development
Tel: +1 (604) 602-9989
Email: [email protected]
Website: www.mirasolresources.com
Quality Assurance/Quality Control of the Indra exploration program:
All exploration on the project was supervised by Mirasol CEO Stephen C. Nano, who is the Qualified Person under NI 43-101.
Mirasol applies industry standard exploration sampling methodologies and techniques. All geochemical soil, stream, rock and drill samples
are collected under the supervision of the company’s geologists in accordance with industry practice. Geochemical assays are obtained
and reported under a quality assurance and quality control (QA/QC) program. Samples are dispatched to an ISO 9001:2008 accredited
laboratory in Chile for analysis. Assay results from surface rock, channel, trench, and drill core samples may be higher, lower or similar to
results obtained from surface samples due to surficial oxidation and enrichment processes or due to natural geological grade variations
in the primary mineralization.
Forward Looking Statements: The information in this news release contains forward looking statements that are s ubject to a number of
known and unknown risks, uncertainties and other factors that may cause actual results to differ materially from those anticipated in our
forward-looking statements. Factors that could cause such differences include: changes in world commodity markets, equity markets,
costs and supply of materials relevant to the mining industry, change in government and changes to regulations affecting the mining
industry. Forward -looking statements in this release include statements regarding future exploration programs, operation plans,
geological interpretations, mineral tenure issues and mineral recovery processes. Although we believe the expectations reflec ted in our
forward-looking statements are reasonable, results may vary, and we cannot guaran tee future results, levels of activity, performance or
achievements. Mirasol disclaims any obligations to update or revise any forward -looking statements whether as a result of new
information, future events or otherwise, except as may be required by applicable law.
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 release.
Argentina
Chile Bolivia
Chile
Salares
Norte
La
Coipa
Marte
Lobo
Inca de Oro
Spence
Sierra
Gorda
El Guanaco
1.37
Moz
Au
5.75
Moz
Ag
El
Penon
6.95 Moz Au
188.1 Moz Ag
San Cristobal
0.99
Moz
Au
5.4
Moz
Ag
Chuquicamata
Esperanza
Gaby
Escondida
Taca
Taca
El Salvador
Potrerillos
El
Abra
Toki
Indra
Project
Antofagasta
Tocopilla
Taltal
100 km
N
El Guanaco
1.37
Moz
Au
5.75
Moz
Ag
58
56.2
56.8
55.1
56.9
54.8
5,000 m
N
Figure 1: Indra Project – Location. August 2018
INDRA
AGNI
Paleocene
Mio-Pliocene
Igneous Belts
Significant Deposits
Commodity
Gold
Gold-Silver
Copper
Copper-Gold
Age
Mio-Pliocene
Oligocene
Paleocene
Overview Legend
Structure
Trans orogen structure
Regional scale structure
Project Legend
Mineral Occurrence
Geochron Age Data
(labelled by age, Ma)
Mapped Veins
Alunite
High Clay/Illite/Muscovite
Low Clay/Illite/Muscovite
Kaolinite
Smectite
Landsat-8 Satellite
Alteration Maps
Silicified Floats Zone
Vein Floats Zone
Figure 2: Indra Project – Geology and Geochemistry. August 2018
Gravel cover
5,000 m
N
Gravel cover
INDRA
AGNI
INDRA
ppm
Mn Mo Cu Pb Zn
Max (n=583) 50000 21.7 5180 161.5 432
Mean (n=583) 1767 0.91 83.78 5.68 28.75
INDRA
ppm
Au Ag As Ba Hg Te Tl
Max (n=583) 0.14 1.0 12000 10000 9.57 3.81 16.9
Mean (n=583) 0.002 0.15 1457 293 0.10 0.023 2.92
AGNI
ppm
Au Ag As Ba Hg Te Tl
Max (n=272) 0.013 1.69 10000 6850 14.8 26 20
Mean (n=272) 0.001 0.16 696 299 0.80 0.23 2.73
AGNI
ppm
Mn Mo Cu Pb Zn
Max (n=272) 8040 139.5 763 1660 3780
Mean (n=272) 586 10.78 62.31 43.28 102.70
0.05 to 0.14
0.03 to 0.05
0.015 to 0.03
0.01 to 0.015
0.075 to 0.01
Rock Chip Assays
Gold Equivalent
Au+(Ag/60)
Below Detection
Figure 3: Indra Project – Indra and Agni prospect Vein Breccia Photos. August 2018
Altered Rhyolite
flow dome
Indra Prospect: 10m wide, multistage
carbonate
-
quartz vein
-
breccia
Indra Prospect: colloform banded
carbonate silica vein / breccia
Indra Prospect: hydrothermal breccia
colloform banded clast with carbonate
silica matrix
Agni Prospect: 2m wide vein breccia zone
barite
-
goethite
-
limonite silica matrix
Agni Prospect: barite
-
goethite fill to breccia
*Adapted after Buchanan, 1981.
Indra Project: Current land
surface / depth of erosion
Gold - Silver
deposition interval
Figure 4: Indra Project – General Epithermal Model. August 2018