Spin-forbidden pyroxene absorptions, detected in the visible wavelength range of the spectral data acquired of asteroid 4Vesta by the Visible and Infrared (VIR) Spectrometer onboard the Dawn spacecraft [1,2], provide valuable complementary information of the asteroidal surface composition. They can be used to verify the link of Vesta's surface composition to the HED meteorites. Further, these absorptions are very sensitive to space weathering effects, especially the mixing of the pyroxenes on Vesta's surface with exogenic dark opaque material. Their distribution across the surface and association to specific surface features provide unique information about the ages/degradation of these surface features and the nature of space weathering processes on Vesta. However, these absorptions are usually very faint and thus often difficult to be identified in the individual spectra. Therefore a special approach is needed to enable the detection and mapping of these absorptions across Vesta's surface using the hyperspectral VIR data set.