TSXV TRBC OTCQB Trrcf 1 Delivering the Next Generation of Copper Mines in Chile
NEWS RELEASE
TSXV TRBC OTCQB TRRCF 1 DELIVERING THE NEXT GENERATION
OF COPPER MINES IN CHILE
25 FEBRUARY, 2026 | VANCOUVER, BC
Potential Large scale Porphyry - High Sulphidation
System at Jiguata Project — Tribeca Resources
Technical Update
Tribeca Resources Corporation (TSXV: TRBC) (OTCQB: TRRCF) (“ Tribeca Resources ”, the
“Company”) is pleased to report technical updates from ongoing field programs and integrated
analysis of mapping, soil sampling, hyperspectral and geophysical datasets at its Jiguata
porphyry copper exploration project in Northern Chile.
Highlights:
Structural analysis indicates the Jiguata project is situated adjacent to the crustal scale
north-south oriented Loa fault and at the intersection of significant NW and NE structures,
which are critical components in the formation of major porphyry Cu-Au-Mo and high
sulphidation epithermal Au-Ag-Cu deposits within the Chilean Andes.
Four substantial alteration centres have been delineated along a 7 km by 4 km northwest-
oriented trend, suggesting a sizeable multiphase porphyry-epithermal district
The alteration mineralogy and its distribution point toward the development of potential
porphyry-related advanced argillic, steam-heated zones, which may conceal underlying
mineralization
Geological mapping has revealed large-scale, high-energy alunite-jarosite-bearing
phreatic and hydrothermal breccias, as well as relatively unaltered dacitic porphyritic
domes. These features are interpreted to represent multiphase porphyry intrusive centres
at depth within a telescoped system
Coincident IP chargeability and low resistivity anomalies match the scale and intensity
observed in other recent deep porphyry discoveries beneath “barren” porphyry-related
advanced argillic caps
Multiple resistivity signatures within intensely altered zones are interpreted as indicators
of high sulphidation epithermal vuggy silica targets and “silica shoulders” associated with
deeper porphyry systems
Tribeca Resources CEO, Dr. Paul Gow commented:
“We are very pleased with what we are uncovering at the Jiguata Project. With four large zones
of alteration developed over a 7km length, in the right structural setting, we can see a district
coming together. While we are now awaiting detailed geochemical results and ground spectral
information that will add to this picture, we believe the signs are there for the development of
mineralization at depth. This systematic approach, although requiring significant pre-drilling field
activity, should yield high quality drill targets that we can test with confidence. Field work is
ongoing, but we are confident that drill holes can be targeted in a way that fully encapsulates all
the data gathered during this systematic phase, after which we will look to mobilise drill rigs to
priority targets.”
TSXV TRBC OTCQB TRRCF 2 DELIVERING THE NEXT GENERATION
OF COPPER MINES IN CHILE
Jiguata Porphyry Copper-Molybdenum Project
The Jiguata Project is a 10,000 hectare property located in the Tarapacá region in northern
Chile. It is situated in the northern extension of the prolific Palaeocene and Eocene-Oligocene
porphyry copper belts where it is overprinted by the younger Miocene Belt of magmatism that
hosts recent large scale high sulphidation epithermal gold and porphyry copper-gold
discoveries further to the south, including Vendaval Cu-Au Porphyry (First Quantum) (“Vendaval)
and Salares Norte Au-Ag High Sulphidation Epithermal (Goldfields) (“Salares Norte”) (Figure 1).
References to nearby or regional deposits are provided for geological context only. The
presence, size or grade of mineralization on other properties in the belt, including Vendaval and
Salares Norte, is not necessarily indicative of mineralization on the Jiguata Project.
Figure 1. Location of the Jiguata Project within the Miocene Belt of northern Chile. Deposits sizes and structural
interpretation from *Farrar, D. G., Tosdal, R. M., and Dilles, J. H., 2023, Lithospheric architecture of the Central Andes:
Economic Geology, v. 118, no. 6, p. 1253–1280.
TSXV TRBC OTCQB TRRCF 3 DELIVERING THE NEXT GENERATION
OF COPPER MINES IN CHILE
Structural setting and prospectivity of the Jiguata Project
Structural interpretation has been completed across the Jiguata Project, incorporating newly
acquired geophysical surveys and evolving field geological mapping. This interpretation
indicates the project is situated along the Domeyko Structural Corridor, a continental-scale,
structural feature that is defined by a 40–60 km wide zone that stretches for more than 1,000 km
in northern Chile. The Loa Fault system, part of the Domeyko system, has been interpreted to
pass through the Jiguata Project. The Domeyko Structural Corridor hosts significant giant
porphyry systems in northern Chile, including Escondida, Chuquicamata, Nueva Union,
Collahuasi, Quebrada Blanca and Cerro Colorado, which are referenced solely to illustrate the
regional geological setting. Such deposits are not necessarily indicative of mineralization on the
Jiguata Project.
Structural analysis has also interpreted coalescing oblique structural controls, oriented
northwest and northeast within the Domeyko Structural Corridor. The northeast trending
Quebrada Parca - Quebrada Minacucho fault system, which is a proven deep seated, fault zone
that hosts porphyry style mineralization at the Cerro Colorado deposit and Queen Elizabeth
prospect to the west of Jiguata, has been interpreted as transecting the Jiguata Project.
Four Alteration Centres Highlight Multiple Priority Targets at Jiguata
Alteration mapping from multispectral satellite imagery, supported by ongoing field mapping,
has identified four significant alteration centres within a ~7 km x 4 km corridor at Jiguata (Figure
2). The alteration centres, referred to as La Soberana, Escudo Real, El Trono and Cetro Dorado,
present as broad alteration zones in favourable structural settings, coincident with mapped
breccias, and at La Soberana dacitic domes, along with prospective geophysical responses.
La Soberana
The alteration centre represents a historical focus for exploration activities at Jiguata and is
defined by an approximate 2.5 km x 1.5 km multispectral alteration and mapped alteration zone
proximal to mapped hydrothermal breccias and dacitic porphyritic domes.
The alteration centre is situated at the intersection of a prominent northwest trending structural
zone and the interpreted north-south trending Loa Fault zone. Preliminary soil pXRF results
outline coincident anomalism in As, Mo and Pb with historic rock chips returning up to 1,700
ppm Mo. The location features coincident high IP chargeability and low resistivity responses,
along with an interpreted complex magnetic signature. Historic limited drill testing, comprising
two reverse circulation holes drilled to 250m-300m depth, identified broad zones of anomalous
copper hosted within a variably altered andesite host, however the historic drilling is considered
to have been too shallow, and too far south, to have intersected remodelled geophysical
responses at La Soberana.
Cetro Dorado
The Cetro Dorado alteration centre is situated approximately 3.5km to the northeast of La
Soberana (Figure 2) and represents the northeastern-most target, situated within the interpreted
Loa Fault zone proximal to the intersection of major northeast and northwest faults. The
alteration centre is defined by an approximate 3.2 km x 2.0 km alteration footprint coincident
with an interpreted low magnetic zone. IP modelling defines a northeast trending moderate
chargeability response (+ 25 mV/V – Figure 3) with localised cores of coincident high
chargeability and low resistivity along with deeper resistive “root” features. Preliminary soil pXRF
analyses delineate a broad As anomaly coincident with the alteration and geophysical features
within the area (Figure 4). Field mapping is underway in this area.
TSXV TRBC OTCQB TRRCF 4 DELIVERING THE NEXT GENERATION
OF COPPER MINES IN CHILE
Escudo Real
Escudo Real is situated approximately 4km to the northwest of La Soberana proximal to a
prominent northwest trending structural feature. The alteration centre is defined by a 2.5 km x
1.8 km alteration footprint situated between El Trono to the northwest and La Soberana to the
southeast. Preliminary field mapping has identified northwest trending hydrothermal breccias
bearing alunite and jarosite within the broad alteration zone. IP coverage outlines a northwest-
trending resistive feature with partially coincident chargeability and offset low resistivity
responses which remain open towards the northeast. Soil geochemistry has not yet been
completed at this target location.
El Trono
El Trono is situated approximately 5.5km to the northwest of La Soberana. The location is
considered a high priority target defined by a locally prominent topographic high with alteration
modelled from satellite data extending over approximately 2.0 km x 2.0 km, proximal to the
interpreted northeast Minacucho fault system. Encouragingly, the modelled multispectral and
preliminary mapped alteration indicates the presence of a substantial silica and potentially
sulphide-rich core with peripheral clay rich alteration halos. Topographical access constraints
have limited detailed mapping and have impeded the advancement of geochemical and
geophysical coverage; however, historic rock chips have returned values of >200 ppm Cu and
up to 0.03 g/t Au proximal to mapped jarosite-bearing breccias. El Trono is prioritized for
completion of soil geochemical surveys and potential extension of geophysical surveys to
advance potential drill targets.
TSXV TRBC OTCQB TRRCF 5 DELIVERING THE NEXT GENERATION
OF COPPER MINES IN CHILE
Figure 2. Location of alteration centres with an overview of the Escudo Real and El Trono locations
Preliminary geophysical modelling and interpretations
Results have been received from the recently completed ground magnetic survey across the
Jiguata Project area. Interpretation of preliminary total magnetic intensity (TMI) data (analytical
signal) outlines a broad magnetic low that contains discrete magnetic highs. The magnetic low
is spatially coincident with mapped and interpreted alteration, while the discrete magnetic highs
are observed to be associated with mapped dacitic porphyritic domes.
The Company interprets that the discrete magnetic highs may represent potential intrusive
centres and/or feeder zones, whereas the broader magnetic low may reflect magnetite-
TSXV TRBC OTCQB TRRCF 6 DELIVERING THE NEXT GENERATION
OF COPPER MINES IN CHILE
destructive alteration. An objective of the current work is to combine the interpretation of
hyperspectral mineral composition patterns with detailed modelling of the geophysical datasets
to provide vectors towards mineralized centres.
Interpretation and 3D remodelling of historic induced polarization (IP) data delineate two
principal chargeability trends: one northeast-trending and one northwest-trending, with
coincident low resistivity cores centred on the identified alteration centres (Figure 3).
The IP data also identified discrete extensive resistive “root” features developed proximal to low
resistivity and elevated chargeability responses.
At La Soberana and Cetro Dorado, discrete magnetic highs appear to occur adjacent to
coincident low resistivity and chargeable responses, supporting these areas as priority targets
for follow-up work.
Figure 3. Summary maps of the geophysical signatures in relation to the four alteration centres.
TSXV TRBC OTCQB TRRCF 7 DELIVERING THE NEXT GENERATION
OF COPPER MINES IN CHILE
Initial pXRF soil geochemical results
Preliminary pXRF analysis of soil samples has been completed over the La Soberana and partially
across the Cetro Dorado zones (Figure 4). The samples have subsequently been submitted to
the laboratory for multielement geochemistry and hyperspectral analysis. At a high level, broad,
coincident multi-element pXRF geochemical anomalies have been delineated that are spatially
associated with interpreted alteration features and structural settings. See below for information
related to analysis and QAQC procedures for the pXRF data, which are preliminary in nature;
laboratory results are pending and will be reported once received.
The multi-element pXRF anomalies define a northeast trending pattern, extending up to
approximately 2.5 km at La Soberana and 1.9 km at Cetro Dorado. These anomalies correlate
with IP chargeability and low resistivity responses.
Interpretation of the soil dataset will be refined when final laboratory geochemical and spectral
results are received. Unfortunately, current turnaround times at analytical laboratories in Chile
are increasing with the current high level of exploration activity in the country, making the timing
of receipt of these analyses uncertain.
Figure 4. Summary results of pXRF analyses collected to date from the soil samples in the northeastern oriented
zone covering the La Soberana and Cetro Dorado targets.
TSXV TRBC OTCQB TRRCF 8 DELIVERING THE NEXT GENERATION
OF COPPER MINES IN CHILE
Progressing geological mapping
Field geological mapping has been completed across the La Soberana alteration centre and
continues to unfold across the remaining alteration centres. At La Soberana, mapping has
delineated a northeast trending hydrothermal breccia with quartz and alunite, and jarosite
developed within a zone of advanced argillic alteration. This breccia zone trends toward
younger cover and has been traced intermittently over an approximate 1.5 km strike length.
Hydrothermal breccias at La Soberana appear spatially associated with outcropping, altered
hypabyssal dacitic porphyritic domes.
Reconnaissance mapping at the other alteration centres has also identified hydrothermal
breccia outcrops coincident with areas of argillic to advanced argillic alteration.
Mapped hypabyssal dacite domes show spatial agreement with interpreted geophysical
features, and prospective breccia zones appear to partially coincide with IP chargeability and
low resistivity responses. Mapping is being expanded to cover the majority of the Jiguata tenure,
with priority placed on areas exhibiting coincident alteration and geophysical anomalism.
Figure 5. Summary of the available data in the La Soberana area.