  We present the imaging and spectroscopic analysis of the combined Chandra
ACIS-S observations of the Compton-thick Seyfert 2 galaxy NGC 4945. We
performed a spatially-resolved spectroscopy of the circumnuclear environment of
the source, picturing the innermost 200 parsecs around the highly absorbed
nucleus. The additional 200 ks ACIS-S data with respect to the previous
campaign allowed us to map with even greater detail the central structure of
this source and to discover an enhanced iron emission in the innermost nuclear
region, with respect to the associated Compton reflection continuum. We
revealed that the Equivalent Width of the iron K$\alpha$ line is spatially
variable (ranging from 0.5 to 3 keV), on scales of tens of parsecs, likely due
to the ionization state and orientation effects of the reprocessing material,
with respect to the central X-ray illuminating source. A clump of highly
ionized Fe XXV He-$\alpha$ is also detected, 40 parsecs east to the nucleus.
When observations taken years apart are considered, the central unresolved
reflected emission is found to remain constant.
