Field Reports/MARITIME INTELLIGENCE

BLACK SAND PROTOCOL

High-Density Marine Alluvial Recovery on the Tasman Shoreline.

PAYSTREAK INTELAPR 22, 2026Updated FEB 01, 20266 MIN READ

The Tasman Sea is a natural sluice box. Stand on the West Coast after a cyclonic event, and you aren't looking at sand—you're looking at a tactical concentration of minerals.

GEOLOGICAL VECTOR

The gold in these sands has traveled further than any other in New Zealand. release from the Southern Alps, ground by glaciers, and washed through the Buller and Grey river systems, this gold is ultra-refined, ultra-pure, and ultra-thin.

Wave Sorting

High-energy storm surges strip light silica sand, leaving dense layers of magnetite and gold—known to locals as "The Mirror."

Gold Grade

Typically 22k-23k purity. Grain size is "flour" grade, requiring zero-surface-tension recovery methods.

DEPLOYMENT WINDOWS

  • The Storm WindowThe 24-hour period immediately following a Tasman gale. This is when the black sand seams are recharged.
  • The Neap Tide AdvantageLower water levels expose ancient "beach-lead" gravels that are usually submerged.
  • High-Concentrate ZonesFocus on the "Backwash" zones near river mouths like the Waiho and Haast.

TACTICAL EQUIPMENT

Traditional river panning methods will fail. Recovering flour gold requires a specialized protocol.

Surfactant (Jet Dry)
50-Mesh Classifiers

Access Sector Data

Download high-res sediment density maps for the West Coast.