Summary Geology Hole RZDDH10-01 RZDDH10

Summary Geology Hole RZDDH10‐01 •
•
•
•
•
•
•
•
•
Drill hole RZDDH10-01 was drilled in north-east corner of property, located at UTM777680E/9583300N
(PSAD56/UTM17S) elevation 1491m at azimuth 270° and inclination -75°
The hole intersected Hollín Fm clastic sediments from 0 to 34m, followed by 34 to 216m of Fruta
Andesite, 216 to 267m of Suarez Fm comprised dominantly of conglomerate with minor sandstone and
mudstone
Intersected Misahuallí Fm feldspar porphyritic andesite from 299 to EOH at 450.75m, the unconformity
is interlayered sediments and volcanics
Brecciation, fault gouge and late brittle faulting affects the entire section, earlier rehealed hydrothermal
and tectonic breccia is related to the mineralizing even
Clasts of hydrothermal quartz in Suarez Fm conglomerate indicate proximity to the mineralizing centre
Alteration, silicification and sulphides in the forecast elevation range of 1250 to 1050masl were
intersected
Silicification in Suarez Fm and at the unconformity with the Misahuallí Fm is evidence of hydrothermal
activity related to mineralization
The Suarez Fm is broadly geochemically anomalous between 10 to 50ppb Au and 0.1 to 1.9ppm Ag
Gold grades of maximum 0.79g/t and silver up to 6.9g/t over individual 2m composite samples of the
Misahuallí Fm porphyritic andesite were intersected
Gold, silver and base metal intersections above geochemical anomalous levels, empirical geological evidence
including alteration and silicification, and the early deformation and brecciation are all encouraging factors of
proximity to mineralization.
RZDDH10‐03 Abandoned in Highly Fractured Rock •
•
•
•
Drill hole RZDDH10-03 is approximately 300m southwest of Hole RZDDH10-01 along the same
structural trend, located at UTM777525E/9583050N (PSAD56/UTM17S) elevation 1586m at azimuth
315° and inclination -70°
The hole intersected Hollín Fm clastic sediments from 0 to 91m, followed by Fruta porphyritic andesite
to 156m
Colluvial boulders of sandstone at surface, fracturing and unstable conditions were encountered
throughout the hole, causing loss of drilling fluid circulation and binding of drill rods
Remedial actions to stabilize hole were unsuccessful, abandoned at 156m depth
RZDDH10‐03A Preliminary Results
•
•
•
•
•
•
Drill hole RZDDH10-03A was collared within 5m of RZDDH10-03 on the same drill platform, at
UTM777528E/9583046N (PSAD56/UTM17S) elevation 1586m at azimuth 315° and inclination -70°
Drill hole was cemented to 155m to stabilize the wall, and drilled through the cement plug to continue to
planned total depth
Intersected 0 to 92m of Hollín Fm sandstone and conglomerate, 92 to 380m of Fruta Andesite.
From 380 m to total depth of 650m intersected complex interlayering of Suarez Fm sediments,
Misahualli volcanics, and Zamora Batholith granodiorite
Suarez and Misahuallí Fms are variously haematite, chlorite, epidote, carbonate altered with sulphides
and silicification
Massive silicified and clay altered zone intersected from 580 to 618m with disseminated, replacement
and veinlet sulphides (pyrite, marcasite and chalcopyrite), with overprint of later epithermal zoned quartz
veins
The strong brecciation, alteration and massive silicification intersected from 580 to 618m are part of a large and
intense hydrothermal system. The massive clay-quartz zone is overprinted by lower temperature (epithermal)
zoned quartz-carbonate veins which is analogous to textures at Fruta del Norte.
Photographs of the core samples are shown on the Company’s website. Of particular note are the
photographs for drill hole RZDDH10-03A showing the 38m sulphide mineralised section in the Misahualli
Fm.
Geological Factors Controlling Gold Mineralization The following are believed to be key factors required to generate economic mineralization at Rio Zarza:
•
•
•
•
•
Misahuallí Fm host rock – acts as brittle host conducive to formation of vein-type mineralization and
possible geochemically reactive rock
Sub-Suarez Fm unconformity with Misahuallí Fm – zone of mixing of hydrothermal with basin and
meteoric waters, and contrast in porosity and rheology
Elevation depth range – all indications of mineralization (alteration, sulphides, silicification) intersected
thus far, and bulk of FdN mineralization is within the 1050 to 1250masl elevation range, which suggests
both main mineralizing event is time-restricted, and occurred at a specific stage in the basin evolution
Major structure contemporaneous with basin formation to act as a conduit for hydrothermal mineralizing
fluids
Strong alteration and massive silicification indicates major mineralizing system, zoned epithermal veins
indicates cooling of the hydrothermal mineralizing system into the range conducive to deposition of gold
and associated metals
By analogy to Fruta del Norte and results of previous drilling at Rio Zarza, where these factors are coincident is
the locus of high grade vein-type epithermal gold mineralization.
Next Drill Hole RZDDH10-06 Location
The next drill hole is located approximately 200m south-southwest of Hole 03/03A, and is planned to intersect the
sub-Suarez Fm unconformity at lower elevation. The target is a strong IP chargeability anomaly in the Misahuallí
Fm indicative of sulphides.
On completion of this hole, the Company will have drilled approximately 3450m in 6 holes to total depth.
Sample Preparation, Analytical Protocol and Quality Control
Samples were taken from half core split with a diamond saw, and composited over 5m intervals in the Hollin Fm
and 2m in the Suarez Fm. Composite samples were crushed to 70% passing 2mm and riffle split 250g
subsample for pulverizing to 85% passing 75µm for analysis.
Samples were prepared at the ALS Chemex sample preparation laboratory in Quito, and analysed at the ALS
Chemex South American regional laboratory in Lima, Peru. Gold was assayed using the fire assay technique,
and multi element analysis using ICP-MS.
Control samples are included in each batch of 100 samples, including 6 Certified Reference Material (CRM), 5
field duplicates prepared from quartered split core, and 4 blanks. CRM and blank material is internationally
certified and supplied by Ore Research and Exploration (Pty) Limited (OREAS) in Australia.
Quality control results indicate there is no apparent analytical bias or systematic contamination of samples, and
analyses are accurate compared to CRM stated performance criteria.
Qualified Person
SR McMullan, P.Geo, Vice President of Exploration for Ecometals Limited, is a qualified person according to
National Instrument 43-101 definition and has prepared the technical information included in this press release.
Drilling, logging, sampling and dispatch were under the direct supervision of the Qualified Person.
(planned)
Rio Zarza Gold Project geology map showing location of drill holes completed and the planned location of hole RZDDH10‐06 Section 9583300N
West
East
Hollín Fm
sandstone
RZDDH10-01
Fruta Andesite
anomalous Au
disseminated, veinlet
and replacement sulphides
Suarez Fm
conglomerate
1250masl
Elevation range
of mineralization
intense haematization
and pervasive silicification
FdN Outline
resource block model
1050masl
Final depth
450.75m
Zamora Batholith
granodiorite
Silicification
Misahuallí Fm
porphyritic andesite
Geological section looking North through drill hole RZDDH10‐01 – anomalous Au in Misahuallí Fm below sub‐Suarez Fm unconformity (FdN outline from Micon reports for Aurelian Resources filed on SEDAR) Photos of RZDDH10‐01 These photos show the section above and below the sub‐Suarez unconformity with the underlying Misahualli Fm, including the interval with geochemically anomalous and sub‐economic grade of Au. RZDDH10‐01: brecciated carbonate veined clasts RZDDH10‐01: brecciated zoned chlorite‐
and andesite matrix @298.4m, assay result: Au carbonate veins @302.4m, assay result Au 0.069ppm, Ag 0.3ppm, Cu 130ppm 0.012ppm, Ag 0.1ppm, Cu 152ppm RZDDH10‐01: altered and pervasively silicified Misahuallí Fm disseminated sulphides @316m, RZDDH10‐01: closeup of altered, silicified, assay result Au 0.79ppm, Ag 2.2ppm, Cu 420ppm brecciated Misahuallí Fm with disseminated sulphides @ 317m, assay result Au 0.79ppm, Ag 2.2ppm, Cu 420ppm Photos of RZDDH10‐03A These photos show different styles of alteration, deformation, veining and mineralization intersected in Hole RZDDH10‐03A. Of particular note is the 38m intersection of massively silicified and altered, brecciated, veined and sulphide mineralized section with lower temperature zoned quartz‐carbonate veins immediately below the sub‐Suarez unconformity in the Misahuallí Fm. The alteration assemblage and quartz textures appear to be a combination of an early stage mesothermal system (shown by the massive silicification and clay alteration) overprinted by a later lower temperature epithermal phase (shown by zoned colloform quartz‐carbonate veins). Both phases of the hydrothermal system may be mineralized. The locus of the alteration is the unconformity between the Suarez and Misahuallí Formations, where changes in geochemical and rheological factors are conducive to deposition of mineralization. Below the unconformity in the Misahuallí Fm the style of mineralization is confined veins and massive, above the unconformity in the Suarez Fm the mineralization is more diffuse and disseminated. RZDDH10‐03A: Tectonic breccia, possible phase of Zamora Batholith granodiorite, hosted in epidote altered Misahuallí Fm feldspar porphyritic andesite @440m RZDDH10‐03A: Hydrothermal brecciation and alteration of Misahuallí volcanics, pervasive silicification @441m RZDDH10‐03A: Misahuallí Volcanics @ 432m: epidote‐haematite altered and silicified, zoned veins (haematite‐epidote/chlorite‐
quartz/carbonate) RZDDH10‐03A: Suarez Fm angular matrix support conglomerate @449m, fault slice of Suarez within Misahuallí host RZDDH10‐03A: section of Suarez Fm conglomerate in Misahuallí Fm host @479m RZDDH10‐03A: Hydrothermal breccia calcite matrix in Misahuallí porphyritic andesite @510m RZDDH10‐03A: chalcopyrite‐carbonate vein in Misahuallí Fm volcanics @509.5m RZDDH10‐03A: Carbonate‐chalcopyrite veins in Misahuallí Fm @532m RZDDH10‐03A: Carbonate vein and matrix fill in hydrothermal breccia Misahuallí Fm @ 510 to 513.5m RZDDH10‐03A: tectonic breccia in Misahuallí Fm, strongly silicified @525m RZDDH10‐03A: Massive hydrothermal quartz and clay replacement alteration, host probably Misahuallí Fm porphyritic andesite, from 580 to 610m
RZDDH10‐03A: Sheared/brecciated massively silicified and clay alteration, veinlet and disseminated sulphides (pyrite), photo centred @ 604m RZDDH10‐03A: Replacement sulphides (chalcopyrite and pyrite) in mixed zone of altered and brecciated interlayered Suarez, Misahuallí and Zamora Batholith units from 542.5 to 573.2m RZDDH10‐03A: epithermal colloform banded quartz vein overprinting haematite altered‐silicified tectonic breccia @ 616.3m RZDDH10‐03A: silicified breccia and quartz‐
carbonate veining, host rock undetermined, Suarez Fm conglomerate below @ 619.5 RZDDH10‐03A: Zamora Batholith granodiorite @ 646m, sheared Suarez Fm below this section.