Ridgestone Releases Maiden Mineral Resource Estimate at Guadalupe y Calvo, Mexico
Ridgestone Releases Maiden Mineral
Resource Estimate at Guadalupe y Calvo,
Mexico
Vancouver, British Columbia--(Newsfile Corp. - May 10, 2021) - Ridgestone Mining Inc. (
TSXV: RMI
)
(
OTCQB: RIGMF
) (
FSE:4U5
) ("
Ridgestone
") is pleased to announce a maiden National Instrument
43-101 (NI 43-101) Mineral Resource Estimate for its Guadalupe y Calvo (
"GyC"
) gold-silver project in
Chihuahua, Mexico. The maiden mineral resource was estimated for two principal mineralized
structures, the Rosario and Nankin veins, captured within a combined pit-constrained and underground
mineral resource model. Mineralization at GyC remains open for expansion both along strike and down-
dip at depth. The GyC project is comprised of 20 square kilometres. Ridgestone entered into an option
agreement with Endeavour Silver in December 2020 to acquire a 100% interest in the property.
Highlights:
Indicated Mineral Resource:
356,000 ounces
of gold-equivalent at an average grade of
1.72 g/t
AuEq
Inferred Mineral Resource:
460,000 ounces
of gold-equivalent at an average grade of
4.65 g/t
AuEq
* Mineral Resource Estimate for a combined pit constrained and underground scenario at a cut-off grade of 0.27 g/t AuEq in-pit and 1.33 g/t AuEq
underground
"We are very pleased with this significant initial mineral resource estimate," commented Jonathan
George, CEO, "which is a material milestone for any junior exploration company and provides a solid
foundation as we move forward to expand the resource both along strike and at depth. We are currently
finalizing plans for an upcoming drill program which is planned for this fall after the rainy season. We
believe this year will be an exciting and transformational year for the Company as we continue to
concurrently advance our Rebeico copper-gold project in conjunction with our GyC gold-silver project."
The estimate was completed by Marc Jutras, P.Eng., M.A.Sc. of Ginto Consulting Inc. and complies with
National Instrument 43-101 ("NI 43-101") and guidelines developed in 2014 by the Canadian Institute of
Mining and Metallurgy ("CIM"). Mr. Jutras is a registered professional engineer in the provinces of British
Columbia, Quebec and Newfoundland and is independent of Ridgestone. In accordance with NI 43-101
a Technical report will be filed on SEDAR within 45 days of this release.
Table 1: Guadalupe y Calvo Indicated and Inferred Mineral Resource Estimate
Method
Category
Tonnage
tonnes
Ag Grade
g/t
Au Grade
g/t
Ag Content
oz
Au Content
oz
AuEq Grade
g/t
AuEq Content
oz
Open Pit
Indicated
5,865,413
46.3
0.97
8,734,564
182,133
1.58
298,594
Underground
Indicated
562,031
94.1
1.92
1,700,679
34,733
3.18
57,409
Total
Indicated
6,427,444
50.5
1.05
10,435,243
216,866
1.72
356,003
Open Pit
Inferred
584,637
37.7
0.75
707,975
14,101
1.25
23,541
Underground
Inferred
2,489,509
107.5
4.02
8,605,435
321,516
5.45
436,256
Total
Inferred
3,074,146
94.2
3.40
9,313,410
335,618
4.65
459,796
Notes:
1
.
Mineral Resources which are not Mineral Reserves do not have demonstrated economic viability. The estimate of Mineral Resources may
be materially affected by environmental, permitting, legal, title, taxation, sociopolitical, marketing, changes in global gold markets or other
relevant issues. The CIM definitions (2014) were followed for classification of Mineral Resources. The quantity and grade of reported
inferred Mineral Resources in this estimation are uncertain in nature and there has been insufficient exploration to define these inferred
Mineral Resources as an indicated Mineral Resource and it is uncertain if further exploration will result in upgrading them to an indicated
or measured Mineral Resource category.
2
.
The resource was prepared by Marc Jutras, P.Eng. of Ginto Consulting, an independent QP, with an effective date of May 10, 2021.
3
.
The mineral resources are presented at a 0.27 g/t AuEq cut-off grade in pits and 1.33 g/t for underground, without dilution. A specific
gravity of 2.55 was utilized based on measurements and comparable project analysis. Assay grades were capped at 40 g/t gold for the
Rosario vein and at 25 g/t gold for the Nankin vein, from 1m composited assays. Metallurgical recoveries of 95% were assumed for both
gold and silver. Commodity prices of US$1,700/oz gold and US$23/oz silver were assumed.
4
.
The Whittle pit-constrained resource assumed a mining cost of US$1.50/t, processing cost of US$12.50/t, G&A of $4/t and an internal pit
wall angle of 45 degrees.
5
.
Underground mineral resources are defined as material outside of the Whittle pit shell and assumed a mining cost of US$60/t, processing
cost of US$12.50/t, and G&A of $4/t.
6
.
Rounding of estimates may result in summation differences
QA / QC
Reverse Circulation and Diamond types of drilling were conducted at GyC Project. The drilling was
mainly focused on mineral resource definition by previous owners. The samples are sent for preparation
to SGS in Mexico and assayed at their analytical facilities for fire assay with atomic absorption finish and
by gravimetric finish for grades above 10gpt Au.
It is the view of the QP that industry-standard QA/QC
procedures to the program using reference materials, blanks, standards, and duplicates.
Qualified Persons
The estimate was prepared by Mr. Marc Jutras of Ginto Consulting Inc. ("Ginto"), an independent
Qualified Person in accordance with the requirements of NI 43-101, who has reviewed and approved the
contents of this news release.
Noris Del Bel Belluz, P. Geo., Vice-President of Exploration, is a "qualified person" as defined under NI
43-101 and has reviewed and approved the content of this news release.
About Ridgestone Mining Inc.
Ridgestone is a Canadian mineral exploration company focused on its Guadalupe y Calvo (gold/silver)
and Rebeico (copper/gold) projects located in Mexico.
For further information, please contact:
Rad Rajaram - Manager Corporate Relations and Business Development
Telephone: 416-732-0604
This news release contains forward-looking statements or information (collectively referred to herein
as "forward-looking statements").
Such statements are subject to risks and uncertainties that may
cause actual results, performance or developments to differ materially from those contained in the
statements and are not guarantees of future performance of the Company.
In this news release such
statements include but are not limited to any ongoing drilling programs, timing of such programs, or
exploration results.
No assurance can be given that any of the events anticipated by the forward-
looking statements will occur or, if they do occur, what benefits the Company will obtain from them.
These forward-looking statements reflect management's current views and are based on certain
expectations, estimates and assumptions which may prove to be incorrect.
A number of risks and
uncertainties could cause our actual results to differ materially from those expressed or implied by the
forward-looking statements, including those described in the Company's regulatory filings available
on
www.sedar.com
.
Should one or more of these risks or uncertainties materialize, or should any of the
Company's assumptions prove incorrect, actual results may vary in material respects from those
projected in the forward-looking statements.
Readers are cautioned that the foregoing list of risks,
uncertainties and other factors is not exhaustive.
Unpredictable or unknown factors not discussed
could also have material adverse effects on forward-looking statements.
The impact of any one factor
on a particular forward-looking statement is not determinable with certainty as such factors are
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the future considering all information then available.
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release are expressly qualified in their entirety by these cautionary statements.
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