Geochemistry · Western Australia
Western Australia Drillhole assays
Western Australia drillholes, coloured by the most gold found anywhere down each hole.
What it shows
Drillholes across Western Australia, coloured by the most gold found anywhere down the hole: low (background, under 10 ppb of gold), anomalous (10 to 100 ppb), high (100 to 1000 ppb), or bonanza (1000 ppb and over). Those cutoffs are in parts per billion (ppb), where 1000 ppb is about one gram of gold in a tonne of rock. Each point is one drill collar, the spot on the surface where a hole was put down by an exploration company and lodged with the state in WAMEX. The reading shown is the best result from any depth in that hole, so a bonanza collar means the drill went through high-grade gold somewhere beneath it. Drilling is the most direct measurement there is of what is actually in the ground, so these mark where hard-rock gold has been confirmed rather than only suggested by surface sampling.
Putting this on your map
Taking a layer from the Library onto a stack, and tuning how it draws, is a short guided tour on your own map.
How do I add map layers to Patchly?More for Western Australia
- State setup Pro Western Australia
15 layers 3 map setups
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Western Australia Bedrock Geology (1:100k) Western Australia bedrock in detail, over the exposed goldfields. -
Western Australia Bedrock Geology (1:500k) Western Australia interpreted bedrock, the solid rock beneath the cover. -
Western Australia Burnt Ground Where Western Australia burnt between 2021 and mid-2023. -
Western Australia Contours Topographic contour lines at 10 m over Western Australia. -
Western Australia Gold Mining Activity Where Western Australia's goldfields were worked hardest, as a heat map.