The data set consists of a series of 11 hyperspectral images of hydrothermally altered rock samples from the footwall of the Kangaroo Caves volcanogenic massive sulfide deposit in the East Pilbara Granite Greenstone Terrane in Western Australia. The rock samples were collected along a transect that crosscut several alteration zones, one chlorite-quartz and two quartz-sericite alteration zones. Samples were acquired during a field visit in 2003. Ancillary rock sample data and descriptions are available from the opnline archive https://phys-techsciences.datastations.nl/dataset.xhtml?persistentId=doi:10.17026/dans-2zz-a4td. with doi: 10.17026/dans-2zz-a4td.

The image data set consists of laboratory-acquired hyperspectral images from slabs of the 11 rock samples with a Specim SWIR camera (model SWIR 3, Serial number SN430024, date 12.11.2015) and OLES Macro lens mounted in a Sisuchema instrument setup (Specim, Spectral Imaging Ltd, Oulu, Finland) from 894 to 2511 nm in 288 bands at 26 µm pixel size. Image sizes were 384 by approximately 1200 pixels, resulting in images of a width of 11 mm and a length of approximately 4 cm.

The images are provided in reflectance. The raw images were converted to reflectance using dark current and white reference measurements acquired during the recording of the images. The images are noise reduced by i) checking for bad pixels that produced anomalous pixel-values, ii) the identification and removal of bad bands near the lower (1000 nm) and higher (2500 nm) margins of the measured wavelength range, and iii) application of a spatial-spectral smoothing filter that averaged five spatial and two spectral neighboring pixel values.

The images are provided in ENVI file format and can be opened/viewed in Hyperspectral Python.