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tin in the form of quartz-cassiterite
veinlets. As with other hydrothermal
tin deposits, leakage of tin occurs
beyond the envelopes as country rock
disseminations;
Quartz-cassiterite veinlets are not
ubiquitous in tourmaline envelopes.
There are parts of the envelopes that are
not mineralised with tin. The current
geological interpretation does not
include any constraint on the location of
tin within these envelopes; and
The quartz-cassiterite veinlets are steeply
dipping, while the mineralised envelopes
are moderate to steeply dipping.
Resource BRPM estimate
In 2002, BRPM (subsequently ONHYM)
evaluated a resource for Achmmach by
completing a programme of 29 diamond
drill holes and bulk sampling from an
underground exploration adit on the
890mRL level.
Using this data, ONHYM produced an
unclassified resource estimate of 9.57Mt
www.africanmining.co.za
A view over the land that hosts the Achmmach tin deposit in Morocco.
containing 1.09% Sn at a cut-off grade
of 0.50%. This estimate does not comply
with the JORC guidelines and therefore
was not classified as mineral resources
under this code. As a result, additional
resource definition work was undertaken
by KAS with the aim of defining a
JORC-compliant resources. The latest
JORC 2012 compliant resource upgrade
was revised by QG in November 2014.
It is based on the completion of 270
diamond drill holes totaling 102 905m.
The resource estimate is based on a cut-off
grade of 0.50% Sn. b
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