The Gold AppThe Cartographer

The Gold App

The Cartographer

Find the ground worth working.

The Cartographer

Find the ground worth working.

The Cartographer is The Gold App's gold mining map: 44,088 gold and mineral sites recorded by the USGS, live BLM mining-claim checks on any spot, public land, geology, relief and rivers, plus the claim-filing systems of the USA, Canada and Australia.

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The Prospector's Field Guide

From the first colour in the pan to a refined bar

Mining claims, assaying, refining and where to prospect, in one place and tied to the map above. Use the buttons in each section to put that part of the guide on the map.

01

Gold mining & claims

Gold mining claims

Gold mining claims are legally defined parcels where a person or company has staked the right to mine. A filed claim gives mining rights subject to regulation, but it does not by itself prove that commercial gold is present or that the property is worth more than the filing costs.

When you stake a claim, you gain the exclusive right to extract minerals from the land subject to applicable rules. What you do not get automatically is proof that the land contains enough gold, or gold of sufficient grade, to make the claim profitable.

How to file with the BLM and state agencies

  • Research and identify land for mining, whether through BLM systems or through private-land permission.
  • File a Notice of Location with the BLM and, when required, with the relevant state agency.
  • Pay annual BLM claim fees, often in the roughly $155 to $200 range depending on claim type, plus any state fees.
  • Follow local regulations, environmental requirements, taxes, and reclamation rules throughout the life of the claim.

Most U.S. gold mining happens on public land managed by the BLM. If someone is prospecting on private land, they need the landowner's permission and remain subject to private-land law. In many states, filing with the BLM is only part of the process, since state-level filing may also be required.

Canada and Australia often use more direct online staking systems, but the same core principle applies: a claim is only as valuable as the underlying geology, compliance, and proof of mineral content.

How valuable is a claim?

Many claims are effectively worth only the filing fees if no real geological work has been completed. Simply filing a claim does not guarantee valuable mineral deposits. Geology is the key. A professional geological report is often what separates a speculative claim from something investors or buyers can evaluate seriously.

Proving a claim's worth & funding

The value of a gold claim is not proven by filing alone. To attract investors or sell a mine seriously, the property needs geology, sampling, and disclosure work that can stand up to scrutiny: geological surveys, drilling, sampling, laboratory analysis, and a mineral resource estimate based on qualified work.

  • Geological surveys and reports define the quantity and quality of mineral deposits.
  • Mineral resource estimates provide a scientific basis for financing and claim sales.
  • SEC, SME, and similar disclosure standards matter when presenting projects to investors.
  • Independent verification improves credibility with banks, investors, and serious buyers.

In the United States, this means paying attention to SEC expectations for mining disclosures. In Canada, disclosure expectations such as NI 43-101 enter the conversation when projects are presented to investors or buyers. SEC mining disclosure overview.

The Gold App helps miners, claim owners, and sellers connect with qualified geologists, prepare mining reports and disclosures for investors, and buy or sell mining claims and mines. Contact us.

Mining methods

Surface (placer) mining

Placer mining is one of the oldest forms of gold extraction and focuses on retrieving gold from loose soil, sand, or gravel. It relies on gold's higher density and often includes panning, sluicing, and dredging in riverbeds or alluvial sediments.

Lode mining

Lode mining targets gold in ore-bearing hard rock formations, often underground or in mountainous settings. It requires more specialized machinery, drilling, and tunneling.

River mining

River mining is a subtype of placer mining conducted directly in river or stream beds. It involves recovering gold from embedded sediments and requires stronger care around aquatic habitats and water quality.

Deep-sea mining

Deep-sea mining is an emerging frontier that looks at polymetallic nodules and seafloor sulfides containing valuable metals, including gold. It also raises major ecological questions and requires careful regulatory oversight.

Sustainable mining

Net-zero goals, biodiversity conservation, renewable energy, water recycling, targeted drilling, and reduced chemical intensity all shape the future of responsible mining.

Geology & field tools

Geology is central to successful prospecting. Quartz veins, greenstone belts, fault lines, shear zones, and alluvial deposits all help direct prospectors toward more promising ground.

  • Quartz veins often act as carriers for gold in volcanic and mineralized systems.
  • Greenstone belts are well known for hosting rich gold deposits.
  • Fault lines and shear zones can provide pathways for mineral-rich fluids.
  • Alluvial deposits are important indicators in placer and surface prospecting.

Essential tools

  • XRF spectrometers for fast non-destructive mineral analysis.
  • Geological maps for understanding belts, faults, and ancient river systems.
  • Core drills for assessing deeper ore-bearing formations.

Finding gold with geology

  1. Research and mapping focused on known gold-bearing environments.
  2. Initial field surveys using visible indicators and surface tools.
  3. XRF analysis for rapid mineral verification.
  4. Sampling and core drilling where results are promising.

Tip: turn on Bedrock geology, Shaded relief and Rivers & streams in the map's Layers tab to read the ground the way this guide describes.

Metal detectors for gold

A metal detector finds nuggets and specimen gold near the surface: old placer workings, dry washes, tailings and bedrock that erosion has exposed. Very fine gold is too small for a detector to sense; pans and sluices recover it.

VLF or PI

  • VLF (very low frequency) detectors send a continuous signal. Models built for gold run at higher frequencies, which makes them more responsive to small nuggets near the surface. In heavily mineralized ground they need careful ground balancing and can lose depth.
  • PI (pulse induction) detectors send short pulses. They cope better with heavily mineralized ground and hot rocks and generally reach larger nuggets at greater depth, but they are less able to tell iron trash from gold and can pass over very small pieces.

Ground balance to the soil you are on, sweep slowly with the coil low and level, overlap each pass, and fill every hole you dig.

Where you may detect (United States)

  • Minerals found on a mining claim belong to the claim holder: detecting on an active claim without permission is claim jumping. Check claims with the BLM mining claims layer first.
  • BLM land: gold and silver may be prospected for with hand tools, including pans and metal detectors; sluicing, dredging and commercial mining need permits.
  • National Forests: most allow low-impact detecting without authorization; digging that disturbs the ground can need a notice of intent. Ask the ranger district.
  • National Parks: possessing or using a metal detector is prohibited (36 CFR 2.1(a)(7)) unless it is packed away.
  • Objects at least 100 years old on federal land can be protected archaeological resources: leave artifacts where they lie and report them.

Tip: turn on BLM mining claims, BLM roads & trails and Public land ownership in the Layers tab before you head out. Sources: BLM, U.S. Forest Service, 36 CFR 2.1, 16 U.S.C. 470bb.

02

Assay & testing

Assay and field testing methods are how miners, prospectors, and sellers move from surface indication to real proof.

Specific gravity testingCompares dry and wet weight to estimate density and check whether a metal, specimen, bullion item, or coin is consistent with the material it claims to be. A practical screening step before deeper assay or refining work.
Acid assayCommonly used for surface-level metal testing and quick purity checks.
Electronic gold testersFast field tools that help evaluate metal composition without the slower workflow of traditional lab analysis.
Fire assayOne of the strongest references for formal precious metals testing; a higher-confidence route when deeper validation is needed for ore, concentrates, or serious metal valuation.
XRF testingHandheld XRF spectrometers give fast non-destructive readings and support field analysis, mapping, and better drilling or sampling decisions.
Ultrasound assayAnother non-destructive test path for metal evaluation, used to screen materials before deeper processing.

03

Refining & selling your metal

Send precious-metal material for assay and refining: tell us the source, estimated purity, and weight, and our team follows up with intake and payout. We accept placer, lode, industrial, e-waste, recycled, dental, industrial shot, foils and leaf, and precipitant material.

Material can be screened and confirmed with acid assay, XRF, fire assay, electronic testers, ultrasound testing, and other fit-for-purpose methods depending on the lot type and the payout path.

  • Field screening — quick methods decide whether material moves forward into deeper evaluation.
  • Purity confirmation — higher-confidence methods support payout decisions, industrial recovery, and investor-grade reporting.
  • Recycling sources — industrial scrap, e-waste, manufacturing remnants, and sludges each need category-specific intake handling.

Sell or refine your metalsTalk to our team

04

Where to pan, prospect & metal-detect

Our regional guides, first published on The Gold App map in November 2024. Each one covers a whole state or country, so its map point is the general area, not an exact site. Rules, access and claims change: check land status with the BLM claim check and local regulations before you dig or detect.

Loading the regional guides…

05

Automated Vault Machines (A.V.M.'s)

The Gold App Automated Vault Machine

Self-service precious-metals vaulting, on location. The Gold App A.V.M. combines a secure deposit-box vault with an automated teller for buying, depositing, and redeeming physical gold, silver, platinum, and palladium — backed by the same insured custody as your in-app vault.

  1. Deposit — insert or hand off physical metal at the machine.
  2. Verify — weight and purity assessed and recorded to your account.
  3. Vault — metal moves into insured professional custody.
  4. Access — track, transfer, or redeem from the app anytime.