It is generally believed that the high momentum components (HMC) of the angular correlation of annihilation radiation or Doppler broadening spectra predominately map the positron annihilation with core electrons, containing only a small fraction coming from localized df-type valence electrons. In the present work we study how far the contribution of valence electrons to the HMCs of the electron-positron (e-p) momentum density can be neglected. Calculations are performed for gold within both the independent particles model (IPM) and including the e-p correlation effects nonlocally, using the weighted density approximation (WDA). In particular, the HMC results for s+p-type electrons are compared with their core and d+f-type valence counterparts.