technical report on the nechalacho deposit, thor lake project ...

was equal to 60 m by 60 m by 30 m and the second pass was 240 m by 240 m by 120 m. The
shorter range is perpendicular to the plane of the mineralized zone and interpolation was
performed on the un-wrinkled/flattened zones. The details and comparison to previous resource
calculations are listed in Table 17-10.
Table 17-10 Calculation Metal Values
Avalon Rare Metals Inc. – Nechalacho Deposit
Comparison of Methods Wardrop SWRPA Avalon
Capping no no no
Calculation Type kriged IDW 2 IDW 2
Composite Length 2.5 m 2.0 m 2.0 m
Flattening of Holes yes yes no
Search Ellipsoid 1 60x60x30 60x60x10 60x60x30*
Minimum composites/hole 4 4 4
Total composites/hole 15 15 8
Max composites/hole 3 15 3
Search Ellipsoid 2
120x120x60 120x120x20 60x60x30**
Minimum composites/hole 3 4 4
Total composites/hole 15 15 8
Max composites/hole 15 15 8
Search Ellipsoid 3
240x240x120 240x240x30 240x240x120
Minimum composites/hole 3 4 3
Total composites/hole 15 15 15
Max composites/hole 15 15 15
total composites 7,164 10,574 19,393
number of holes used 91 206 291
*= upper
**=basal
RESOURCE CLASSIFICATION
A distance model was created by Avalon and subsequently further delineated using a manual
clipping routine to regionally define three regions or domains of contiguous or near-contiguous
mineralization at a cut-off value of C$260/tonne. MineSight was used to define “ore types”
based on distance to a diamond drill hole and in the case of Upper Zone mineralization whether
it met a two hole minimum for “measured and indicated”. All measured (as defined as 25m
distance to a drill hole) was then downgraded to indicated. Indicated was limited to a maximum
of 60 meters to a drill hole (and more than 25 meters). The deposit was broken into three
domains as shown in Fig.17-6. All mineralization within the Thor Lake boundary was also
Technical Report 43-101 – March 13, 2011 Page 17-17
Prepared by Avalon Rare Metals Inc.