Briefing
The Langtry mineral resource estimate has increased from 50 Moz to 57 Moz of Ag in 24 Mt at an average grade of 73 g/t Ag. Key points: The Langtry mineral resource estimate has increased from 50 Moz to 57 Moz of Ag in 24 Mt at an average grade of 73 g/t Ag; In addition to its robust silver resource, the Waterloo resource now contains 130,000 ounces of oxide gold contained in 17 Mt at an average grade of 0.25 g/t gold in the Inferred category; The Langtry MRE resource contains 57 Moz silver in 24 Mt at an average grade of 73 g/t silver; In addition to its robust silver resource, the Waterloo resource now contains 130,000 ounces of oxide gold contained in 17 Mt at an average grade of 0.25 g/t gold in the Inferred category; For the Waterloo Property only the following drillhole grades were capped prior to estimation: Ag 450 g/t, Au 2 g/t, Ba 31% and Zn 7%. - Totals may not represent the sum of the parts due to rounding. - 1,2The 2025 MRE ha; Historical estimates of total extracted silver up until 1896 are estimated to be between 15 and 20 Moz (Harthrong, 1983). This brief is based on the cited source artifact and is intended as a research entry point, not a replacement for the original source or EGM canonical data tables.
Source Notes
The Langtry mineral resource estimate has increased from 50 Moz to 57 Moz of Ag in 24 Mt at an average grade...
Extractive summary evidence · source
In addition to its robust silver resource, the Waterloo resource now contains 130,000 ounces of oxide gold contained in 17 Mt at...
Extractive summary evidence 2 · source
The Langtry MRE resource contains 57 Moz silver in 24 Mt at an average grade of 73 g/t silver.
Extractive summary evidence 3 · source
In addition to its robust silver resource, the Waterloo resource now contains 130,000 ounces of oxide gold contained in 17 Mt at...
Extractive summary evidence 4 · source
Extracted Document Text
This is a readable excerpt of the EGM normalized Markdown text. It helps search engines and researchers understand PDF, filing, or company-document content while the original source remains authoritative.
# Calico Project | Apollo Silver Source: https://apollosilver.com/calico-project/#technicals Published: 2021-07-02T17:29:10+00:00 Fetched: 2026-09-12T08:03:15.131+00:00 Source artifact: f9d786e1-94df-4c27-85ea-6d1232fc002a Normalizer input: text ## Content # Calico Project | Apollo Silver Source: https://apollosilver.com/calico-project/#technicals Published: 2021-07-02T17:29:10 [Skip to content](https://apollosilver.com/calico-project/#main) - TSX.V:APGO / OTCQB:APGOF / Frankfurt:6ZF - info@apollosilver.com Ticker Tape Widget [ApolloPost-market\\ \\ 2.79D\\ \\ +0.23(+9.20%)](https://www.tradingview.com/symbols/OTC-APGOF/?utm_campaign=ticker-tape&utm_medium=widget&utm_source=apollosilver.com) [Apollo SilverMarket closed\\ \\ 3.86D\\ \\ +0.31(+8.73%)](https://www.tradingview.com/symbols/TSXV-APGO/?utm_campaign=ticker-tape&utm_medium=widget&utm_source=apollosilver.com) [SilverMarket closed\\ \\ 64.4580R\\ \\ +0.8325(+1.31%)](https://www.tradingview.com/symbols/SILVER/?utm_campaign=ticker-tape&utm_medium=widget&utm_source=apollosilver.com) [ApolloPost-market\\ \\ 2.79D\\ \\ +0.23(+9.20%)](https://www.tradingview.com/symbols/OTC-APGOF/?utm_campaign=ticker-tape&utm_medium=widget&utm_source=apollosilver.com) [Apollo SilverMarket closed\\ \\ 3.86D\\ \\ +0.31(+8.73%)](https://www.tradingview.com/symbols/TSXV-APGO/?utm_campaign=ticker-tape&utm_medium=widget&utm_source=apollosilver.com) [SilverMarket closed\\ \\ 64.4580R\\ \\ +0.8325(+1.31%)](https://www.tradingview.com/symbols/SILVER/?utm_campaign=ticker-tape&utm_medium=widget&utm_source=apollosilver.com) [ApolloPost-market\\ \\ 2.79D\\ \\ +0.23(+9.20%)](https://www.tradingview.com/symbols/OTC-APGOF/?utm_campaign=ticker-tape&utm_medium=widget&utm_source=apollosilver.com) [Apollo SilverMarket closed\\ \\ 3.86D\\ \\ +0.31(+8.73%)](https://www.tradingview.com/symbols/TSXV-APGO/?utm_campaign=ticker-tape&utm_medium=widget&utm_source=apollosilver.com) [SilverMarket closed\\ \\ 64.4580R\\ \\ +0.8325(+1.31%)](https://www.tradingview.com/symbols/SILVER/?utm_campaign=ticker-tape&utm_medium=widget&utm_source=apollosilver.com) [ApolloPost-market\\ \\ 2.79D\\ \\ +0.23(+9.20%)](https://www.tradingview.com/symbols/OTC-APGOF/?utm_campaign=ticker-tape&utm_medium=widget&utm_source=apollosilver.com) [Visit TradingView — financial charting platform and trading community](https://www.tradingview.com/?utm_campaign=ticker-tape-logo&utm_medium=widget&utm_source=apollosilver.com) [SUBSCRIBE](https://apollosilver.com/subscribe/) [](https://apollosilver.com/) - [Home](https://apollosilver.com/) - [Corporate](https://apollosilver.com/corporate/) - [Overview](https://apollosilver.com/corporate/) - [Board of Directors](https://apollosilver.com/company-overview/board/) - [Management](https://apollosilver.com/company-overview/management/) - [Corporate Directory](https://apollosilver.com/corporate/#corporate) - [Governance](https://apollosilver.com/company-overview/governance/) - [Sustainability](https://apollosilver.com/sustainability/) - [Projects](https://apollosilver.com/projects/) - [Calico Project](https://apollosilver.com/calico-project/) - [Cinco De Mayo Project](https://apollosilver.com/cinco-project/) - [Investors](https://apollosilver.com/investors/) - [Overview](https://apollosilver.com/investors/) - [Stock Information](https://apollosilver.com/investors/#overview) - [CEO Blog](https://apollosilver.com/ceo-blog/) - [Events](https://apollosilver.com/events/) - [Presentations](https://apollosilver.com/investors/#presentation) - [Filings & Financials](https://apollosilver.com/investors/#filings) - [AGM Materials](https://apollosilver.com/agm/) - [Analyst Coverage](https://apollosilver.com/investors/#analysts) - [Technical Reports](https://apollosilver.com/calico-project/#technicals) - [Extractive Sector Transparency Measures Act (ESTMA)](https://apollosilver.com/investors/extractive-sector-transparency-measures-act-estma/) - [News](https://apollosilver.com/news-list/) - [Contact](https://apollosilver.com/contact-apollo/) - [Subscribe to Apollo](https://apollosilver.com/subscribe/) - [Home](https://apollosilver.com/) - [Corporate](https://apollosilver.com/corporate/) - [Overview](https://apollosilver.com/corporate/) - [Board of Directors](https://apollosilver.com/company-overview/board/) - [Management](https://apollosilver.com/company-overview/management/) - [Corporate Directory](https://apollosilver.com/corporate/#corporate) - [Governance](https://apollosilver.com/company-overview/governance/) - [Sustainability](https://apollosilver.com/sustainability/) - [Projects](https://apollosilver.com/projects/) - [Calico Project](https://apollosilver.com/calico-project/) - [Cinco De Mayo Project](https://apollosilver.com/cinco-project/) - [Investors](https://apollosilver.com/investors/) - [Overview](https://apollosilver.com/investors/) - [Stock Information](https://apollosilver.com/investors/#overview) - [CEO Blog](https://apollosilver.com/ceo-blog/) - [Events](https://apollosilver.com/events/) - [Presentations](https://apollosilver.com/investors/#presentation) - [Filings & Financials](https://apollosilver.com/investors/#filings) - [AGM Materials](https://apollosilver.com/agm/) - [Analyst Coverage](https://apollosilver.com/investors/#analysts) - [Technical Reports](https://apollosilver.com/calico-project/#technicals) - [Extractive Sector Transparency Measures Act (ESTMA)](https://apollosilver.com/investors/extractive-sector-transparency-measures-act-estma/) - [News](https://apollosilver.com/news-list/) - [Contact](https://apollosilver.com/contact-apollo/) - [Subscribe to Apollo](https://apollosilver.com/subscribe/) # Calico PROJECT #### California Located in mining-friendly San Bernardino County, California, Apollo’s Calico Project combines the Waterloo and Langtry silver properties under one common ownership for the first time. - [Project Location & Access](https://apollosilver.com/calico-project/#project-location) - [Tenure](https://apollosilver.com/calico-project/#tenure) - [Resource](https://apollosilver.com/calico-project/#waterloo) - [Geology](https://apollosilver.com/calico-project/#geology) - [Technical Reports](https://apollosilver.com/calico-project/#technicals) - [History](https://apollosilver.com/calico-project/#history) ## **OVERVIEW** **The Calico Project (“Calico” or the “Project”), comprising the adjacent Waterloo, Langtry and Mule properties, is located in the historic Calico Silver Mining District in the Mojave Desert of San Bernardino County, California.** Under Apollo, the Waterloo and Langtry properties have been combined for the first time. These represent a district-scale mineral system endowment with approximately 6,000 metres (19,680 feet) in mineralized strike length. The Calico Project hosts low-sulfidation epithermal-vein type and disseminated-style silver-barite mineralization, which is open to depth and along strike. Previous operators completed more than 42,000 metres (138,094 feet) of drilling across 438 holes on the Waterloo and Langtry properties. Apollo recently announced an updated mineral resource estimate (“MRE”) for the Calico Project (the “2025 MRE”), which now contains 125 million ounces silver in 55 million tonnes (Mt) at an average grade of 71 grams per tonne (g/t) silver in Measured and Indicated category, and 0.51 Moz silver in 0.6 Mt at an average grade of 26 g/t silver in the Inferred category all at Waterloo. The Langtry mineral resource estimate has increased from 50 Moz to 57 Moz of Ag in 24 Mt at an average grade of 73 g/t Ag. At Waterloo, drilling data supporting the 2025 MRE includes information from historic drilling and 2022 drilling data for a total of 343 holes (28,407 m/93,199 ft), and at Langtry a total of 183 historic holes (23,465 m /76,986 ft) was used. In addition to its robust silver resource, the Waterloo resource now contains 130,000 ounces of oxide gold contained in 17 Mt at an average grade of 0.25 g/t gold in the Inferred category. The Calico Project 2025 MRE has been prepared by Derek Loveday, P. Geo., of Stantec Consulting Services Ltd. (“Stantec”), who is an independent “qualified person” as such term is defined in NI 43-101 (a “Qualified Person”), in co-operation with Mariea Kartick, P.Geo. (an independent Qualified Person for drilling data quality control and quality assurance) and Johnny Marke P.G. (an independent Qualified Person for resource estimation). The 2025 MRE was produced in conformance with the Canadian Institute of Mining Metallurgy and Petroleum (“CIM”) “Estimation of Mineral Resource and Mineral Reserves Best Practices” guidelines and are reported in accordance with NI 43-101. The 2025 MRE has an effective date of June 30, 2025. Mineral resources are not mineral reserves and do not have demonstrated economic viability. There is no certainty that any mineral resource will be converted into a mineral reserve. [](https://apollosilver.com/wp-content/uploads/2022/04/IMG_2897-scaled.jpeg) Drilling hole W22-RC008 at Waterloo, April 2022 [](https://apollosilver.com/wp-content/uploads/2022/04/IMG_2769-scaled.jpeg) Downhole surveying with an Optical Televiewer (DGI Geosciences Inc) in drill hole WCC-RC-004B, April 2022 [](https://apollosilver.com/wp-content/uploads/2022/04/IMG_2742-scaled.jpeg) Barstow sedimentary formation RC drill chips from hole W22-RC-007, April 2022 [](https://apollosilver.com/wp-content/uploads/2022/04/Cooper-Rig-Setup-W22-RC-001-2-scaled.jpg) RC drill rig and Hurricane dust collection system at Waterloo, April 2022 ## PROJECT LOCATION AND ACCESS [](https://apollosilver.com/wp-content/uploads/2022/12/Property-Location-Map-Calico-SBC-20211028-Dec-6-2022.png) **The Calico Project is well-placed relative to infrastructure and is located in the mining-friendly jurisdiction of San Bernardino County, California.** The Project comprises the adjacent Waterloo, Langtry and Mule properties, which total 8,283 acres. The Project is 15 kilometres (9 miles) from the city of Barstow and has an extensive private gravel road network spanning the property. There is commercial electric power within 5 kilometres (3 miles) of the Project. Other mines of note in the region include SV Minerals Searles Lake Boron project, MP Materials Mountain Pass rare earth element mine and Equinox Gold’s Castle Mountain gold mine. Equinox Gold has received acceptance of its project into the United States’ FAST-41 program, which is designed to streamline and derisk the permitting process. Rio Tinto’s Boron mine is near the border with San Bernardino County, in Kern County. # TENURE #### The Calico District claims comprise the Waterloo and Langtry properties, combined consisting of Patented Claims 0 Fee simple land parcels 0 Unpatented lode mining claims (19 Waterloo , 38 Langtry and 418 Mule ) 0 **Private lands at both Waterloo and Langtry have received a Certificate of Land Use Compliance, vesting surface mining rights, which simplifies certain permitting processes.** The unpatented claims on BLM-managed public lands are open for mineral entry, and no monuments, preserves or national parks encroach on these lands. #### WATERLOO PROPERTY **The Waterloo property comprises 27 fee simple land parcels (1,352 acres) and 21 unpatented claims (19 lode mining, 2 mill site claims) (418 acres).** These were acquired by Apollo through an Asset Purchase Agreement between Stronghold Silver USA Corp., a wholly-owned subsidiary of Apollo and Pan American Minerals Inc [Excerpt trimmed for readability. Open the original source for the complete filing or document.]