NI 43-101 Preliminary Economic Assessment - Verde Potash

Verde Potash Plc 8-5
Cerrado Verde Project
NI 43-101 Preliminary Economic Assessment
in electric oven with temperature of approximately 90°C for 24 hours. Using half of the drill
cores assures that all internal humidity is removed from the drill core.
After cooling, each sample is wrapped in Boreda ® tinfoil transparent PVC film (vinyl
polychloride resin) and weighed in air by a OHAUS Adventurer ® digital balance, approved by
Inmetro (the National Institute of Metrology, Normalization and Industrial Quality), with a
precision of at least 2 hundredths of a gram.
The sample is then completely immersed in water through a suspended steel hook attached to the
central beam of the balance. The immersed weight is then recorded. Thereafter, the sample is
returned to its respective place in the drill core box. The dry density calculation is made using
the Archimedes Principle.
Density determinations were made at the sample preparation section at VERDE in 7 samples of
weathered Verdete, obtaining an average density of 1.49g/cm 3 ; and in 65 samples of fresh
Verdete, with an average density of 2.11g/cm 3 .
Density determinations were also made at SGS Geosol Laboratories Ltda, located at km 24.5 of
Highway MG 10, Vespasiano, Minas Gerais. Measurements were made in 2 samples of
weathered Verdete, obtaining an average density of 1.85g/cm 3 ; and 22 samples of fresh Verdete,
with an average density of 2.09g/cm 3 . The measurements are made using the same methodology
than VERDE, spending the Archimedes Principle. The weigh is determinate by a SARTORIUS
TE2145 ® digital balance, with includes calibration with NIST traceable certification and a
precision of at least 4 hundredths of a gram.
SRK Consulting (U.S.), Inc. September 16, 2011
Cerrado Verde_NI 43-101 PEA_343500.020_007_KG