The AEG carbonatite showing is located northeast of Blue River, at kilometre 14.2 on Redsand logging road (Exploration 1979). It is the southernmost of seven known carbonatite occurrences in the Blue River area.

The AEG showing is below treeline, thus outcrop exposure is limited. Of the three types of carbonatites in the Blue River area, the AEG showing is a buff weathering dolomitic (rauhaugite) with 5 to 15 per cent amphibole, 2 to 10 per cent apatite, magnetite and minor phlogopite within folded amphibolite-biotite-feldspar schist of the Semipelite Amphibolite division of the Hadrynian Horsethief Creek Group. For a detailed regional geological description for this and other carbonatite occurrences in the Blue River area refer to the Verity showing (083D 005).

The major outcrop at the AEG occurrence has been traced for over 150 metres along strike and has a maximum thickness of greater than 4 metres. Calcite, dolomite, apatite, ilmenite, forsterite, tremolite-actinolite, chlorite, antigorite, vermiculite, talc, mica, pyrrhotite and lesser amounts of phlogopite, chondrodite, pyroxene, magnetite and limonite comprise the detailed mineralogy of the AEG showing (Fieldwork 1981). Pyrochlore, columbite and zircon may be present in trace amounts. Amphibole and apatite define a contact, and external schistosity parallels foliation. Vertical zoning was noted in weathered outcrop (Fieldwork 1984) but no segregations were found (Open File 1987-17).

In many places fenite can be seen enveloping carbonatite and replacing schists (Fieldwork 1979). Ferro-augite-albite-biotite fenitization may extend up to one metre into adjacent quartz-albite- biotite or biotite-sillimanite-garnet schists. Often a 5 centimetre band of ferro-augite-rich rocks with interstitial albite separates fenite from rauhaugite. Contacts between rauhaugite and fenite are sharp with rauhaugite showing embayed relations with fenite. Schist-fenite contacts are gradational (Fieldwork 1979).

A sample collected from the middle of the claim group at the highest reading from a ground scintillometer survey, returned 0.0116 per cent uranium from a semi quantitative spectrographic analysis (Assessment Report 7783). Analysis of a samples collected from the showing in 1987, indicated 0.278 per cent strontium, 0.002 per cent zirconium, 0.02 per cent lanthanum, 0.0415 per cent cerium, 0.0165 per cent neodymium, 0.0038 per cent scandium, 0.0097 per cent tantalum and 3.44 per cent phosphate (Open File 1987-17). Analytical results of a sample of rauhaugite collected in 1978 are 0.35 per cent strontium, 0.4 per cent niobium, 2 per cent phosphorus and 0.0254 per cent thorium (Fieldwork 1979).