Spectral mineral mapping built into the WA tenement map. Work out where the alteration is without downloading imagery, loading it into QGIS, and writing the band ratios yourself. Regional ASTER to narrow the search, EnMAP hyperspectral to resolve the actual mineral species, dated Sentinel-2 to zoom in and keep an eye on activity.
The CSIRO and Geoscience Australia ASTER Geoscience products, served straight onto the map: the regional view that tells you which ground is worth a second look.
EnMAP reads 224 contiguous spectral bands, so where ASTER sees a broad mineral group we resolve the actual species and its chemistry. We process the raw cube into our own mineral-index and PCA products and serve them straight onto the map, now across the whole of Western Australia.
EnMAP complements ASTER, it does not replace it: hyperspectral has no thermal infrared, so silica and quartz stay an ASTER job.
Once you have narrowed it down, set an "as of" date and a look-back window and NextMaps builds a fresh 10 m cloud-free Sentinel-2 mosaic over the exact block you are working.
Alteration haloes, iron staining and clay caps are some of the clearest vectors toward mineralisation, and the spectral data to map them is public. The catch has always been the workflow: finding the right scenes, downloading gigabytes of imagery, loading it into a GIS, and writing the band-ratio expressions before you can even look. NextMaps does that work for you and puts the result on the same map as your tenure, geology and Tenement Intelligence.
These layers are pathfinders, not truth. A gossan ratio flags an iron-oxide spectral response, not a confirmed gossan, and vegetation and water are masked so they cannot masquerade as signal. Used the way a geologist actually works, regional ASTER to narrow the search, EnMAP hyperspectral to resolve the mineral species, and dated Sentinel-2 to zoom in, they point you at the ground worth a closer look, then a Prospectivity Data Room reads the WAMEX history behind it.
Credit where it is due: Grant Boxer's excellent QGIS resource (grantboxer.github.io/QGIS.html) first introduced us to these ASTER and Sentinel-2 band-ratio methods. All we have done is bring them into NextMaps so you can run them in a couple of clicks instead of building the workflow yourself.