The East Kemptville deposit is a greisen-hosted Sn-Cu-Zn-Ag-In deposit with the alteration and mineralization predominantly affecting the East Kemptville leucogranite (EKL). Three major lithologies (besides overburden) are recognized for the East Kemptville deposit. They are:
1. Leucogranite (EKL) intrusive which is primary host of the mineralization.
2. Within the Baby Zone, a contact zone which is a mineralized igneous breccia containing both metasediment and granite clasts.
3. Metasedimentary rock consisting of interbedded psammites and pelites.

Tin and base metal (Zn-Cu-Ag-W) mineralization within the deposit is primarily fine to medium-grained and is associated with northeast-trending, sub-vertical and zoned, quartztopaz, sulphide-bearing greisens, veins, and stockworks that occur primarily in the sericitesilica-topaz altered portions of the leucogranite meet the roof zone in contact with surrounding metasediments.

In many respects, the geometry of the mineralization over the areal extent of the deposit appears akin to a series of closely spaced jellyfish where the bodies represent wider zones of 51 intense fracturing and coalescing greisens near the top of the intrusion and where the tentacles represent narrower, higher-grade feeders or root zones. A structural control on the emplacement of the mineralization may help explain why some thicker (20-40 m) portions of the deposit occur at greater depths and why some thinner zones (2 ........

Avalon plans to engage a locally (Eastern Canada) based mining contractor to mine material from the Rio Algom Ltd. (RAL) legacy stockpile, the Baby Zone pit and the Main Zone pit. This contractor will be responsible for supplying, operating and maintaining all mining equipment, trucks and mining related infrastructure. Avalon’s cost estimate has only budgeted for emptying the pits of both water and any sludge that may have settled on the bottom.

The mining will re-start as a continuation of the historic open pit operation using a conventional drill and blast process and conventional truck and shovel methods for material movement. Mill feed will be hauled to a small (24 h) stockpile and then reclaimed into the crusher rock box by a front-end loader. The mill treatment rate is set at 2,208 t/d (806,000 t/y) starting initially using only stockpiled material, which will then be supplemented by new feed mined from the Baby Zone Pit during production Years 2 and 3. Thereafter, mining will take place from the southern portion of the Main Zone Pit in Years 3 through 7, followed by production from two pits located in the northern portion of the Main Pit Zone in Years 7 through 14, after which the operation will be fed with the remainder of the legacy stockpile through Years 15 to 19. During Years 2 through 14 when the majority of mill feed is sourced from the pits, approximately 6 weeks’ worth of material will be scheduled from the legacy pile in order to (a) incrementally ........

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