Mineral exploration · pre-dig

Ground Magnetic Survey

Simulated data

Walk one unit along survey lines while a second unit holds still as base station. The base removes the field's drift over time; what remains is the ground.

Survey mapstationstruth

No stations yet. Mark the first station and the map starts here; it grows as you walk.

ContoursImagery

north up · x = east · tap to set the profile line

00nT

Profile

Tap two points on the map to profile the anomaly between them.

Rover |B|

—

simulated

Corrected |B|

—

simulated

Residual (last)

—

simulated

Stations / lines

0 / 0

simulated

Base drift

+0.5 nT

simulated

Coverage

simulated

Site

Vertical (pole) model

Inclination58.3°

≈ 58° (dipole-Earth estimate, not IGRF — can be 5–15° off; enter the site value if known)

Declination0°

Depth estimate

Need ≥ 12 stations across ≥ 2 lines.

Vertical-dipole approximation; depth is order-of-magnitude. Confidence is computed from fit quality and search sharpness, never asserted.

Euler deconvolution

Grid cell2 m

Station spacing is currently 2 m — grid near that, not finer (see the note below).

Structural index

Window cells

Grid at about the station spacing before running Euler: IDW has zero gradient at every station, so the depth depends on the cell size (current: 2.00 m).

Processing

Regional removal

Show horizontal gradientBase correctionTemperature compensation — not enough base data (need ≥30 readings, ≥2°C range)

Demo scenario

Line spacing10 mStation spacing2 mNoise2.7 nTDiurnal amplitude30 nT

Scenario

0/561 stations walked · seed 1

Export

GeoJSON needs at least one station with a lat/lon fix — set an origin via GPS first, or export CSV instead.

Resolution 2.7 nT at 1 sample/s. Magnetics only sees magnetic minerals — magnetite, pyrrhotite, some iron-rich alteration; copper sulfides without pyrrhotite, gold and brines are invisible to this method. A fixed line of units watches the field change over time; only a walked survey maps what is under the ground.