Gold Hart Copper Provides Updates on Drilling at Flagship Tolita Asset in Vicuña District, Geochemical Survey at Nessa Properties in Domeyko Fault System, and New Property Application for Historic Gold Copper Silver Asset & Former Mine
Gold Hart Copper Provides Updates on Drilling
at Flagship Tolita Asset in Vicuña District,
Geochemical Survey at Nessa Properties in
Domeyko Fault System, and New Property
Application for Historic Gold Copper Silver
Asset & Former Mine
Diamond Drill Core From Flagship Tolita Asset in Vicuña District at Laboratory;
Completed 7 RC Drill Holes at Tolita Asset's High Grade Trench in Vicuña;
Update on Comprehensive Geochemical Survey at Nessa Complex in Chile's DFS;
Files Application ("Pedimento") to Expand Portfolio of Prime Properties In Chile
Toronto, Ontario--(Newsfile Corp. - May 20, 2026) - Gold Hart Copper Corp.
(TSXV: HART)
(the
"
Company
", "
Gold Hart
" or "
HART
") is pleased to provide an update with respect to the drilling
campaigns at its flagship Tolita asset. The Company eagerly awaits assays from the diamond drill holes,
and has separately just completed 7 shallower RC drill holes at Tolita's highest-grade trench. Gold Hart
also provides an update on the comprehensive geochemical survey currently underway at the Nessa
Complex properties, and announces that it has filed an application ("pedimento") for an exploration
mining concession (the "
Application
") on a historic gold-copper-silver asset and former mine, to
expand its portfolio of prime properties in Chile.
Update on Diamond Drilling at Tolita in Vicuña District
As prior announced, the Company completed 2 diamond drill holes at the Tolita Gold-Copper-Silver-
Molybdenum Asset in the Vicuña District of Chile. Specifically, DDHTOL01 was drilled down to 1,053m
and DDHTOL04 drilled down to 551m.
Drill core from this diamond drilling campaign is at the
laboratory in Copiapo and the Company expects results over the coming weeks.
Completion of 7 RC Drill Holes at Tolita Targeting High Grade Trench Up to 52g/t Gold
Equivalent with 3.99% Copper
As previously announced, in addition to Gold Hart's primary diamond drilling at its Tolita project, the
Company added a reverse circulation ("
RC
") drill rig in order to target certain higher grade opportunities
closer to surface at Tolita. Specifically, Gold Hart is targeting its highest grade trench, which grades
8.61g/t gold equivalent over 10m, including 2m at 10.40g/t gold, 20g/t silver, and 2.88% copper, and
including grabs of 45.75g/t gold, 28g/t silver, and 3.99% copper (approximately 52g/t gold equivalent).
Gold Hart recently opened up this high-grade trench with a bulldozer and exposed visible green and
turquoise staining typical of copper minerals malachite and chrysocolla. Interestingly, the larger
geophysical anomaly at Tolita appears to reach surface at or near this high-grade trench.
Gold Hart's Vice President Rodrigo Díaz Tillería commented, "Our focus remains the large-scale
porphyry potential of Tolita. But Tolita also offers the rare opportunity to target and hopefully prove a high-
grade shallower component of the asset. In the Vicuña District where 1g/t gold on surface is rare, we
have 52g/t gold, and simply put, we need to test it. RC drilling is significantly faster and cheaper, does
not require water to operate, and is well suited to the characteristics of this target. Our current geological
model assumes that this high-grade trench at Tolita may only be a fraction of the size of the larger
system, but we do believe it hosts potential for generating higher grade intercepts close to surface and
therefore potential to add high grade ounces, thereby demonstrating another facet to the Tolita asset."
To that end,
Gold Hart is excited to announce that the Company has now completed 7 RC drill
holes at this high-grade trench. The Company has today published a video from a recent site
visit explaining the potential significance of this high-grade trench and associated rationale for
the RC drilling:
https://youtube.com/shorts/c7tBwz-8Bl4?si=5_8P2rFoOV6WlaD8
Nessa Copper-Gold-Silver Complex - Comprehensive Geochemical Survey Follows Prior
Preliminary Survey's High Grade Results (Copper Up To 4.7% & Gold Up To 9.7g/t)
Gold Hart is also pleased to announce that the Company has completed the collection of
approximately 650 samples as apart of its first comprehensive geochemical survey at the
Nessa Complex just west of Kinross' La Coipa Gold Mine.
This survey followed upon the success
of the prior announced preliminary geochemical survey, wherein several samples returned high grades
of gold and copper.
Specifically, 7 samples graded 1.25% to 4.73% copper, including 4 samples
exceeding 2.40% copper. 12 Samples graded above 1g/t gold, with 6 samples grading between
4.10g/t to 9.74g/t gold.
Gold Hart has had a team of 8 geologists and assistants leading this geochemical survey at Nessa, and
the Company wishes to thank this team for their excellent work. This comprehensive geochemical survey
initially targeted 500-1,000 samples, primarily within the Ringo claims of the Nessa Complex. The
campaign remains underway and the Company hopes to be in a position to announce its completion in
the coming weeks.
Gold Hart Files Application ("Pedimento") to Expand Its Portfolio of Properties In Chile
Gold Hart is also pleased to announce that the Company filed an application ("pedimento") for an
exploration mining concession (the "
Application
") to expand its portfolio of prime properties in Chile.
The Application covers an area of interest in a historic mining district, which was mined intermittently in
the past (the "
Property
"), and certain historical technical records reviewed by the Company reference
multiple legacy mineral inventory interpretations prepared by prior operator(s) (each referred to as a
"
Historic Mineral Resource
") which are non-compliant within the standards of National Instrument 43-
101 -
Standards of Disclosure for Mineral Projects
("
NI 43-101
"). The Property was mined more than a
decade ago, and Gold Hart is aware of the presence of multiple historical underground workings,
including adits/tunnels. Gold Hart has reviewed certain historical records that appear to have been
prepared contemporaneously with, or shortly following, the period of mining activity, which suggest that
the Historic Mineral Resource estimates may have been derived from grades observed and/or sampled
within these mined areas. Gold Hart has not yet obtained all historical documentation relating to the
Property and will continue efforts to identify, compile, and review additional available information as it
becomes accessible. Accordingly, any disclosure herein is based on the partial information reviewed to
date and should be considered incomplete, and is therefore not to be relied upon.
A "pedimento" is the initial filing in a court-supervised process that, if completed successfully, results in
the constitution of an exploration mining concession. Under the Chilean Mining Code, a "pedimento" that
is duly filed and prosecuted in compliance with applicable legal requirements generally affords its holder
priority to pursue the constitution of an exploration mining concession over the area covered, subject to
no overlapping prior filings and successful completion of the judicial constitution process before the
competent Chilean mining court. One Historic Mineral Resource estimated between 40,000,000 -
50,000,000 tonnes at 1.0% - 1.2% copper and gold grades between 0.5 - 1.0g/t. Another Historic
Mineral Resource estimated approximately double the tonnage at similar gold and copper grades, in
addition to silver of approximately 10g/t. Utilizing current metal prices, the breakdown of the larger
Historic Mineral Resource on the Property would be approximately 44% gold, 43% copper, and 12%
silver
1
, totalling over 4,000,000 ounces of gold equivalent or over 1,500,000 tonnes of copper equivalent,
assuming broadly comparable metallurgical recoveries.
1
Importantly, a Qualified Person has not done
sufficient work to classify the Historical Mineral Resource as current mineral resources or mineral
reserves, and the Company has thus far been unable to verify the reliability of either Historic Mineral
Resource.
The Company is not treating either Historical Mineral Resources as current mineral
resources or mineral reserves, and they are non-verified historical estimates prepared prior to
the Company's interest in the Property.
Gold Hart has not conducted its own analysis and intends to
allocate a team of geologists in order to undertake a thorough review of the area covered by the
Application. The disclosure is provided solely as an indication of the Property's exploration potential and
to provide context for the Company's acquisition rationale.
The Application "pedimento", once published in Chile's Boletín Oficial de Minería, becomes part of the
public record. However, the Company must refrain from providing further specifics regarding the
Property and the area covered until the judicial constitution process is sufficiently advanced. There can
be no guarantee that there are not any potential risks to completion of said process, and therefore no
assurance that the Company will be granted the Property. In order to upgrade or verify the Historic
Mineral Resources as current mineral resources or mineral reserves, the Company would have to review
all project data, validate data quality, create a new geological model and then make an updated
resource estimate. The Historical Mineral Resources utilized categories materially different from current
standards of mineral resources and mineral reserves.
The Company's priorities have not changed as a result of the Company's Application for this
Property. The Company's Tolita property remains the Company's flagship asset. The
Company will promptly allocate a team of geologists and a modest capital budget in order to
undertake a comprehensive review of the area covered by the Property Application from a
geological perspective. The focus of Gold Hart remains the Vicuña District and its flagship
Tolita asset, with the Nessa properties west of Kinross' La Coipa Mine as a strong secondary
complex.
To that end, the Company today announces that it has completed 7 RC drill holes at
the high grade trench of the Tolita property in the emerging Vicuña District of Chile, north of
Lundin's Caserones. Additionally, the Company is in the process of completing the first
comprehensive geochemical survey at the Nessa Complex of properties in the Domeyko Fault
System of Chile, made famous for hosting Escondida, Chuquicamata, and Collahuasi mega-
assets.
Tolita - Flagship Gold Copper Moly Silver Porphyry Target in Vicuña District - Diamond Drilling
Program
Gold Hart geologists - including senior geologists Professor Dr. Jose Frutos, Enrique Viteri, Jonathan
Warner, and Rodrigo Diaz Tillería - carefully designed a 10-hole drill plan in order to optimally test Tolita
as a potential gold-copper-molybdenum-silver porphyry target. As prior announced, Gold Hart first
attempted to drill target #1 known as DDHTOL01 in March of 2025, but after difficulties were
encountered under tight time constraints, the team instead elected to drill DDHTOL02 and DDHTOL05.
These holes were approximately 600m each and encountered approximately 360m and 230m of gold,
copper, and moly porphyry mineralization, respectively.
Recently, Gold Hart returned to target #1
DDHTOL01 with a more powerful drill rig and completed a 1.053km drill hole.
Interestingly, the
core continued to display encouraging characteristics, with multiple intervals showing strong
hydrothermal alterations and mineralization consistent with a fertile porphyry-style environment. Gold
Hart's geologists observed multiple generations of veinlets and stockworks with varying intensities over
intervals up to several hundred meters, banded veinlets with thicknesses of several cm, and locally
chalcopyrite and bornite mineralization has been recognized in several of these veinlets. HART's
geologists do not believe the drill intercepted the same fault which caused a sterile zone in the middle of
the initial 2 diamond holes. More recently, Gold Hart completed a follow-on diamond drill hole -
DDHTOL04 - which reached 551m. In addition to the diamond drill campaign, Gold Hart launched a
campaign of RC drilling at its high-grade trench - with up to 52g/t gold equivalent including 3.99% copper
on surface. The objective of the RC campaign is to demonstrate higher grade pockets close to surface,
beyond the larger porphyry target. Gold Hart has already completed 3 RC drill holes.
Consequently, there await at least another six or seven highly attractive diamond drill targets identified
across the asset area. These targets are supported by a combination of geophysical characteristics,
including chargeability and conductivity, strong geological and structural controls as well as coincident
geochemical anomalies.
Tolita is a very large target, with an original 2.5km
2
geophysical anomaly recently expanded by 76% to
4.5km
2
. The Tolita gold soil sample geochemical surface halo (an approximation of gold on surface
above 0.1g/t) alone is nearly 28Ha and the Tolita property is 3,476Ha equal to approximately 34.8km
2
.
Furthermore, as recently confirmed in a follow-up geophysical survey, the Tolita geophysical anomaly
expands in both size and intensity at depth, which could translate into an enlarging system at depth. Per
the third party geophysicist who conducted the survey, "
The vertical extent of the steeply dipping
conductor that is likely related to a fault is better defined on the two new deep lines (2600N and
452200E). This surprised me, as I had expected resolution similar to the first lines. This would
indicate to me, that the probable structure extends very deeply and has a strong contrast in resistivity
with the host rock. Because it is conductive, it should act as good conduit for hydrothermal water flow,
which should be good news for mineralization. There is confirmation that the alteration system extends
to greater depth and may increase in intensity at depth as it is more conductive. Hopefully, the copper
and gold grades would increase correspondingly as well."
Porphyry systems in Chile, and in the Vicuña District specifically, can prove larger and richer as they
progress deeper. For example, in Chile, Atex Resources announced one of their most significant drill
holes ever (ATXD25C) which graded 2.72% copper equivalent, beginning at 1,558m and ending at a
depth of 1,722m. In the Vicuña District, NGEX published "DPDH028, the best hole drilled to date as
Lunahuasi, which was drilled deeper and to the west of all previous holes", which included multiple highly
compelling intercept including the deepest 53.5m (1,219.5m - 1,273.0m) grading 7.79% copper
equivalent.
About Gold Hart Copper's Nessa Gold-Copper-Silver Assets
Gold Hart's Nessa properties sit on the renowned Domeyko Fault of Chile, most famous for hosting the
Escondida Copper Mine -
now the largest copper mine in the world
- which was first staked by Gold Hart
co-founder Dr. Jose Frutos in the 1970s. Dr. Frutos recognized and personally staked some of the
Nessa claims nearly two decades ago, due to the unique surface alteration - visible from satellite
imagery - with high grades on surface and several historic mines which exploited gold, copper and silver
at or near surface via pits and shallow tunnels. The historic mines coincide with a pervasive yet intense
hydrothermal alteration (silicic-argillic to quartz-sericitic with abundant kaolin in the central part) with a
halo of propilitic alteration in the periphery, with disseminated gold-copper-silver mineralization
throughout.
Gold Hart recently expanded the Nessa property by 330% (3.3X) from an initial property size of 4,100Ha
up to a current land position of 13,500Ha (135km
2
). The Nessa Complex is just south of the massive
Codelco El Salvador - Portrerillos copper mining and smelting complex, one of the oldest copper
smelting facilities in the country. Nessa is also surrounded by major miners Newmont, Solaris, JX
Nippon, and Anglo American, and sits just northwest of Rio2's Fenix gold deposit and just west of
Kinross' La Coipa gold mine.
The Nessa properties were known to host 13 historic artisanal high-grade gold & copper pits, which
were mined using mules due to lack of access. Additionally, historic geochemical surveys discovered
high grades on surface for gold, copper, and silver, with samples up to 25g/t gold, 3.25% copper, 958g/t
silver. However, the Company has now discovered additional copper showings on surface and historic
mining pits, and now believes there may be other unknown targets on these assets.
Gold Hart recently
completed a preliminary geochemical survey and obtained additional high grade samples,
including up to 9.7g/t gold, 968g/t silver, and 4.7% copper on surface.
Please refer to the notes regarding quality assurance and quality control measures applied during the
execution of the work being reported on, at the end of this disclosure. Please visit the Gold Hart Copper
YouTube channel for footage of the road construction and copper oxides at Nessa:
https://www.youtube.com/shorts/Ax6fOStX72c
.
About Gold Hart Copper's Tolita Gold-Copper-Molybdenum-Silver Target
The Tolita property is a historically significant gold-copper asset which was first recognized and staked
in 1993 - by one of the pioneering geologists of the Maricunga-Vicuña district - for its uniquely high
grades of gold and copper on surface
3
. Geochemical surveys revealed gold, copper, silver, and
molybdenum anomalies, which led to trenching. Tolita has had significant trenching (5,600m / 5.6km)
with the highest grade trench returning grades up to 52g/t gold equivalent including 4% copper. Tolita
has undergone helicopter mag surveys which identified 4 unique anomalies as well
3
.
In 1996, a third party company optioned the property and drilled 3 short 200m RC holes, without any
geophysics, and yet still hit gold and copper in all 3 holes, including long intercepts of gold and copper
(150m and 164m, respectively) close to surface in 2 of the 3 holes. At the time, gold was approximately
$300/oz and copper traded below $1.00/lb, and large scale sulphide porphyry deposits with both gold
and copper were often considered less favorable than smaller scale gold-only oxide deposits. As a
result, and due to general market sentiment for junior exploration companies in 1997-1998, Tolita was
only drilled to a depth of 200m with 3 short RC holes (out of a planned 8 hole campaign)
3
.
When Gold Hart acquired the property, a full geophysical survey was conducted by a recognized
geophysics firm, and a large high-chargeability and conductive anomaly was discovered that is near
surface and almost 2.5km
2
in size (recently expanded to 4.5km
2
) and "interpreted as a copper-gold or
gold-copper porphyry system that certainly warrants additional exploration and drilling
4
". Gold Hart
Copper has therefore launched diamond drilling and is fully funded for this planned campaign.
In the spring of 2025, the Company completed two holes of approximately 600m each, confirming that
Tolita indeed hosts a fertile porphyry system. Gold Hart geologists observed early stage veining near
surface, providing the first clear evidence of a porphyry related system within zones of moderate
chargeability. The mineral intercepts occur within a multi-generation stockwork vein system hosted by a
series of multi-phase porphyry intrusions. Multiple alteration types have been identified, overprinting the
original potassic alteration of the porphyry system. At greater depth, the potassic alteration becomes
increasingly dominant, accompanied by more intense and continuous veining across locally moderate to
stronger chargeability amplitudes. The newly acquired geophysical data indicates that the system may
even extend several hundred meters further at depth. Effectively, the Company, and various visiting
geologists have all concluded the presence of a porphyry, and Gold Hart is now focused on exploration
to find the richer grades and potential limits of the system. Please visit the Gold Hart Copper YouTube
channel for footage regarding the mobilization and drill pad expansion:
https://www.youtube.com/shorts/M5ovBFOgQTU
Gold Hart recently hosted a site visit which included tours of the Tolita & Nessa assets. Gold Hart board
and advisory board members including the honourable John R. Baird, Mark Kucher, and Aleta Shiff were
also in attendance. In this 360-degree immersive video - which allows you to interactively toggle views -
Gold Hart co-founder Jonathan Warner explains the diamond drilling process
https://cloud-va.insta360.com/share/va/374Q7q0e1K66213G4421719040
also accessible on
YouTube at
https://www.youtube.com/shorts/lw3fGWwQH2Q
About Gold Hart Copper
Gold Hart Copper is one of the largest independent land owners surrounding major miners where the
famous Maricunga Gold Belt meets the emerging Vicuña Copper Belt in Chile. HART is actively
acquiring, exploring and developing its portfolio of gold, copper & silver properties adjacent to the
largest gold and copper assets on the continent.
HART has rolled-up a portfolio of historically significant assets surrounding majors, in some cases
personally staked by the very same geologists who made the adjacent mega-discoveries, since the early
1990s. Some of the Gold Hart properties have already undergone a first phase of drilling, with highly
encouraging results of gold, copper, silver, and molybdenum. Gold Hart properties are controlled 100%
and not subject to any royalties whatsoever.
HART believes it may be sitting on one of the only fully-preserved untested large-scale gold-copper-silver
porphyry targets in the Vicuña District - an asset that was first recognized for its uniquely high grades of
gold and copper on surface - and staked by one of the Maricunga-Vicuña district's pioneering
geologists
3
in 1993. Gold Hart Copper is fully funded for its planned drill campaign.
HART's team of geologists were personally involved in pioneering exploration in the region, leading to
some of its greatest gold, copper, and silver deposits, and include the country's former Geological
Survey National Deputy Manager Dr. Professor José Frutos. Specifically, senior Gold Hart geologists
were personally involved in the Escondida copper discovery, now the largest copper mine in the world
5
controlled by Rio Tinto and BHP, as well as Norte Abierto / Cerro Casale, the largest gold-copper
discovery in Chile
2
acquired by Barrick and Newmont (GoldCorp) with reserves and resources of 50.6-
million ounces of gold (0.53g/t), 13.4-billion pounds of copper (0.20%) and 218-million ounces of silver
(2.3g/t).
In addition to its large land position in the Vicuña District, Gold Hart recently acquired the Nessa
properties just northwest on Chile's Paleocene-Eocene Belt on the famous Domeyko Fault System,
which is home to some of Chile's largest gold, copper, and silver assets including Escondida,
Chuquicamata and Collahuasi. The Nessa properties host several historic gold and copper artisanal
mines with high grades of gold, copper, and silver on surface, with a large alteration and magnetic
anomaly extending approximately 6km. Kinross' La Coipa Gold Mine sits just east of Nessa.
HART | Gold Hart Copper Corporation - Social Media Channels
Website:
https://goldhartcopper.com
LinkedIn:
https://www.linkedin.com/company/goldhartcopper
X / Twitter:
https://x.com/goldhartcopper
Youtube:
https://www.youtube.com/@goldhartcopper
Instagram:
https://www.instagram.com/goldhartcopper
Qualified Person
The technical information contained in this news release related has been reviewed and approved by Mr.
Jonathan A. Warner, Executive Vice President of Gold Hart Copper and a Qualified Person within the
meaning of NI 43-101.
For further information please contact:
Gold Hart Copper Corp.
Isaac B. Maresky
Chief Executive Officer and Director
Email:
Notes on quality assurance and control regarding geochemical survey published
(i)
Hermetic sealed individual bags for every sample (ii) Unique sample ID for tracking (iii) Coordinate
location and picture of outcrop (iv) Basic geology notes on control points with samples (v) Consistent
sample size between 2-3kg (vi) Certified lab conducting assays. Gold Hart utilized AAA Labs in Chile to
conduct the assays, an independent laboratory with no relationship to Gold Hart.
References & Notes:
1
.
The Historic Mineral Resource noted above are historical estimates and a qualified person has not done sufficient work on behalf of Gold
Hart to classify the historical estimate as current mineral resources or mineral reserves and Gold Hart is not treating the historical
estimate as current mineral resources or mineral reserves. Gold Hart has not conducted its own analysis and intends to allocate a team of
geologists in order to undertake a thorough review of the area covered by the Application. In order to upgrade or verify the Historic Mineral
Resource as current mineral resources or mineral reserves, the Company would have to review all project data, validate data quality,
create a new geological model and then make an updated resource estimate. The Historical Mineral Resource utilized categories
materially different from standard mineral resources and mineral reserves; Current metal prices utilized (Gold $4,716/oz, Silver
$80.32/oz, Copper $6.09/lb)
2
.
Norte Abierto is considered the largest undeveloped gold asset in Chile as defined by hosting the largest number of total gold ounces.
Numbers sourced directly from property owner's website and public filings.
3
.
Please refer to the Company's NI 43-101 Technical Report on Sedar for information pertaining to Gold Hart Copper's properties including
historical exploration at Tolita, including but not limited to, the history of the asset and its original staking, geochemical surveys, trenching
surveys, helicopter magnetic surveys, and historical RC drilling.
4
.
Geophysical survey is summarized in the Company's NI 43-101 Technical report available on Sedar. Such geophysical surveys are not
definitive, and the results are still at an early stage of interpretation, with no guarantee of a mineral discovery.
5
.
Escondida is the largest copper mine globally, as defined by producing the greatest number of copper tonnes per annum. Numbers
sourced directly from property owner's website and public filings.
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/10786/298175_goldhartfig105202026.jpg
Portfolio of Assets in Vicuna and Domeyko
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/10786/298175_20aa9b3c443539df_002full.jpg
Tolita High Grade Gold Copper Trench on Large IP Anomaly
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/10786/298175_20aa9b3c443539df_003full.jpg