Uranium mineralization is predominantly hosted within and spatially related to a grey-red-brown, crenulated garnetiferous biotite schist
unit with uranium mineralization occurring in the form of uraninite.
The dominant rocks are biotite schist, granitic gnesis, garnetiferous amphibolite and quartzite.
The Mbwemkuru Placer Deposit comprises a significant, but un-quantified accumulation of gold in alluvium hosted by: 1) reworked palaeo-placer by the Mbwemkuru River and its tributaries, and 2) an over 10m thick zone of palaeo-placer pebble beds non-conformably overlying biotite schist, gneiss, quartzite, garnet-amphibolite and granitoids.
The boreholes have intersected compositional and tectonised variations of granite, biotite schist
and quartz-feldspar porphyry.
U-mineralization occurs as fracture-filled veinlets within lenses of biotite schist
, or schlieren, and as 0.
Zone &uot;A&uot; is hosted by a biotite schist
that forms a zone tens of metres in thickness grading between 0.
26% U3O8 across 1 m, within a brecciated band of biotite schist
5 to 1 cm diameter occasional blebs of pitchblende hosted in lenses of biotite schist
within sheared and intensely foliated granodiorite.
15 gpt) is correlative with Chatanika Terrane eclogite and biotite schist
mapped in the Zeba trench to the north and suggests the Chatanika Terrane on the Tolovana prospect is structurally bounded and dips 25-35 degrees to the south.
foliated biotite schists
and paragneisses of the Precambrian Dete Inlier
The host country-rock comprises high-grade, strongly foliated biotite schists
and paragneisses of the Precambrian Dete Inlier belonging to the Tshontada Formation.
The Blake River section consists of 78 meters of highly sheared, actinolite chlorite-feldspar biotite schists
which have been interpreted as intermediate-mafic volcanics and volcanogenic metasediments.