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

Table 17-6
Calculation Metal Values
Avalon Rare Metals Inc. – Nechalacho Deposit
gross value
% flt rec %hyd rec % payable%recoverable final nmr nmr can$
Nb2O5 $ 45.00 68.9% 80.0% 100% 55% $ 24.80 $ 27.53
ZrO2 $ 3.77 89.7% 90.0% 100% 81% $ 3.04 $ 3.38
Ta2O5 $ 130.00 63.0% 50.0% 100% 32% $ 40.95 $ 45.45
Ga2O3 $ - 10.0% 0.0% 0% 0% $ - $ -
HREO Y2O3 $ 23.22 79.5% 93.0% 70% 52% $ 12.02 $ 13.34
Eu2O3 $ 1,086.10 79.5% 93.0% 70% 52% $ 562.11 $ 623.94
Gd2O3 $ 13.39 79.5% 93.0% 70% 52% $ 6.93 $ 7.69
Tb2O3 $ 1,166.09 79.5% 93.0% 70% 52% $ 603.50 $ 669.89
Dy2O3 $ 254.59 79.5% 93.0% 70% 52% $ 131.76 $ 146.26
Ho2O3 $ 64.85 79.5% 93.0% 70% 52% $ 33.56 $ 37.25
Er2O3 $ 47.81 79.5% 93.0% 70% 52% $ 24.74 $ 27.47
Tm2O3 $ - 79.5% 93.0% 0% 0% $ - $ -
Yb2O3 $ - 79.5% 93.0% 0% 0% $ - $ -
Lu2O3 $ 510.97 79.5% 93.0% 70% 52% $ 264.45 $ 293.54
LREO La2O3 $ 4.06 79.5% 93.0% 50% 37% $ 1.50 $ 1.67
Ce2O3 $ 2.08 79.5% 93.0% 50% 37% $ 0.77 $ 0.85
Pr2O3 $ 43.87 79.5% 93.0% 50% 37% $ 16.22 $ 18.00
Nd2O3 $ 46.06 79.5% 93.0% 50% 37% $ 17.03 $ 18.90
Sm2O3 $ 5.58 79.5% 93.0% 50% 37% $ 2.06 $ 2.29
HfO2 $ - 0.0% 0.0% 0% 0% $ - $ -
ThO2 $ - 0.0% 0.0% 0% 0% $ - $ -
SPECIFIC GRAVITY
Specific gravity is measured on core samples taken at 5 m intervals within the hole; each
sample is approximately 10 cm long. Breaking the drill core (if necessary) only occurs after
other tests that require undisturbed core (such as photography and geo<strong>technical</strong> analysis) have
been completed. The density method is as follows:
• Weigh the sample in air.
• Weigh the sample suspended in water.
A Mettler Toledo PL3001-S electronic scale is used for weighing in air (Figure 17-1). This scale
has an accuracy of one decimal place.
A small metal can suspended beneath the balance, set up on a table with a hole for the
suspension of the basket, is used to weigh the sample in water (the Mettler balance has a hook
Technical Report 43-101 – March 13, 2011 Page 17-12
Prepared by Avalon Rare Metals Inc.