ExplainerPublished by Lannister MiningLast updated: November 2026
The stages of mineral exploration run from target generation through sampling, drilling, resource estimation, economic studies and permitting to production, and Lannister Mining's Basin Gulch project is now working toward the resource estimation stage.
Each stage costs more than the one before and removes more uncertainty about what is in the ground. Basin Gulch already has more than 320 historical drill holes and trenching behind it. Its next named milestone is a maiden mineral resource estimate.
Geologists study maps, old records and surface rock to pick ground worth claiming.
Basin Gulch: Done. Land package of 11 patented and 53 unpatented claims, 1,107 hectares.
Crews map geology, collect samples and dig trenches to expose mineralized rock.
Basin Gulch: Historical trenching completed, with gold and silver reported over long trench lengths.
Rigs drill holes to test mineralization below surface; core or chips go to a lab.
Basin Gulch: More than 320 historical drill holes. New confirmation and expansion drilling planned.
A qualified person models the data into a mineral resource under NI 43-101 or S-K 1300.
Basin Gulch: Next milestone. Lannister Mining is working toward a maiden mineral resource estimate.
Engineers test whether mining could pay, through preliminary and feasibility studies.
Basin Gulch: Not yet reached.
The company applies for environmental and operating permits.
Basin Gulch: Not yet reached.
A mine is built and begins producing metal.
Basin Gulch: Not yet reached.
A mineral resource estimate states how much mineralized material a deposit holds and at what grade. A qualified person prepares it under a reporting code such as Canada's NI 43-101 or the US SEC's S-K 1300. A maiden estimate is the first one for a property. Lannister Mining is working toward a maiden mineral resource estimate at Basin Gulch, using historical drilling plus new work programs.
Old drill holes are not wasted. They show where mineralization sits and guide where new holes go. To count toward a compliant resource, though, a qualified person usually needs confirmation drilling. Lannister Mining says Basin Gulch could host a significant maiden resource after expansion and confirmation drilling of its historical intercepts.
| Stage | What happens | Typical output | Basin Gulch status (Lannister Mining) |
|---|---|---|---|
| Target generation and prospecting | Geologists study maps, old records and surface rock to pick ground worth claiming. | Claims and a list of targets | Done. Land package of 11 patented and 53 unpatented claims, 1,107 hectares. |
| Mapping, sampling and trenching | Crews map geology, collect samples and dig trenches to expose mineralized rock. | Surface assays and drill targets | Historical trenching completed, with gold and silver reported over long trench lengths. |
| Drilling | Rigs drill holes to test mineralization below surface; core or chips go to a lab. | Drill intercepts in g/t over meters | More than 320 historical drill holes. New confirmation and expansion drilling planned. |
| Resource estimation | A qualified person models the data into a mineral resource under NI 43-101 or S-K 1300. | Mineral resource estimate | Next milestone. Lannister Mining is working toward a maiden mineral resource estimate. |
| Economic studies | Engineers test whether mining could pay, through preliminary and feasibility studies. | Study results and reserves | Not yet reached. |
| Permitting | The company applies for environmental and operating permits. | Approved permits | Not yet reached. |
| Development and production | A mine is built and begins producing metal. | Metal sales | Not yet reached. |
For investors, the stage matters because risk and information change at each step. A project with a published resource has a formal estimate to judge; a project before that stage, like Basin Gulch, asks investors to weigh the drill history and the plan. Read what investors should learn about Basin Gulch or return to the guide to mineral exploration companies in the USA.
This page was written by Lannister Mining, the company that publishes this guide and explores Basin Gulch. Every project fact comes from Lannister Mining's own published materials. Market statistics are quoted as published, with their source named beside them. We do not rank other exploration companies, because we do not hold the same kinds of facts for them.
Mineral exploration usually moves through target generation, early sampling and mapping, drilling, resource estimation, economic studies, permitting, and finally development and production. Each stage costs more and removes more uncertainty. Basin Gulch has historical drilling and trenching behind it, and Lannister Mining names a maiden mineral resource estimate as its next major milestone.
See this answer in the full FAQA maiden mineral resource estimate is the first formal estimate of how much mineralized material a property contains, and at what grade. It is prepared by a qualified person under a reporting code, such as Canada's NI 43-101 or the US SEC's S-K 1300 rules. Lannister Mining is working toward one at Basin Gulch.
See this answer in the full FAQg/t means grams per tonne, the standard unit for gold and silver grades. One gram per tonne equals one gram of metal in every metric tonne of rock. A result such as 1.8 g/t gold over 162 meters, reported historically at Basin Gulch, pairs the grade with the length of the drilled interval.
See this answer in the full FAQOpen at depth means drilling has not yet found the bottom of the mineralization. Open along strike means it has not been closed off in the direction the mineralized zone runs. Lannister Mining describes Basin Gulch as open in both senses and untested regionally, which leaves room for expansion drilling.
See this answer in the full FAQHistorical drill results often predate current reporting standards, so a qualified person usually needs new drilling to confirm them before they count toward a compliant resource. Lannister Mining says Basin Gulch has potential to host a significant maiden mineral resource estimate after expansion and confirmation drilling of historical intercepts.
See this answer in the full FAQA patented mining claim is land where the federal government has transferred title to a private owner. An unpatented claim gives the holder rights to locatable minerals on federal land without owning the surface title. Basin Gulch has a core of 11 patented claims surrounded by 53 unpatented claims.
See this answer in the full FAQStart with the 320+ historical drill holes at Basin Gulch and the plan toward a maiden mineral resource estimate. Then request the investor briefing from Lannister Mining.
Published by Lannister Mining
