Geochemistry · Western Australia
Western Australia Surface samples
Western Australia surface samples tested for gold, coloured by how much each one held.
What it shows
Surface samples from Western Australia, coloured by how much gold each one held: 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 a spot where a rock chip, an outcrop sample or weathered surface material was collected and tested for gold by the Geological Survey of Western Australia, in its WACHEM sample database. Surface testing is mostly a first pass, showing where gold has been picked up at or near the surface rather than where it has been proven at depth. The survey recorded the sample type only patchily, so some of the older records are drill core rather than true surface material. A tight cluster of anomalous or higher readings marks ground worth a closer look, and a line of them following a fault or the boundary between two rock types often traces the trend into new country. The Western Australian goldfields are among the most heavily sampled ground in the country, so this layer is dense wherever gold has been chased.
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 Drillhole assays Western Australia drillholes, coloured by the most gold found anywhere down each hole.