In ref. to my prior post,probably best to start a new thread.
This is the best summary of Madagascar's geomorpholy:
www.smedg.org.au/Premoli.htm
and quoting from this
"The Graphite system:
Rocks assigned to this system form the greatest part of Madagascar's Basement - and they are also
the most consistently mineralised in gold. The system is characterised by the presence of
graphite in greater or lesser abundance. The intensity of metamorphism varies according to
location; the different regional groups are still defined by their metamorphic grade rather than
their stratigraphic relationship."
Bass's holdings sit in the drainage area from Madagascar's known gold area
"
7.2.6. AMBOSITRA-ANTANANARIVO GOLD DISTRICT
Location and history
The Ambositra-Antananarivo gold district is particularly developed in the province of Antsirabe
and officially produced 1,489 kg (48,000 oz.) between 1901 and 1921. The largest part of this
production came from the region south of the Onive River (sketch 7/8). Some deposits occurred
around Ambatolampy and in the Faratsilho sector.
Gold production was particularly important from 1890, when the exploitation was carried out by
administrative corve‚s. Around 1900 these corve‚s employed more than 2,000 workers in the
Sarobaratra River alone. The inevitable exhaustion of the alluvial resources took place
immediately afterwards and was a powerful incentive to the first exploitation of primary gold,
particularly where their contacts with the overlying laterites formed zones of strong enrichment.
This gave the district a new lease of life with a high production between 1904 and 1911. At that
time numerous exploitation of graphite were developed and attracted labour away from the less
lucrative gold workings. Production has been totally artisanal ever since.
It would be futile to list all the deposits that occur in the Ambositra-Antananarivo goldfield.
In any case records are very scarce, and they are mainly known by traces on ancient workings
(Besairie, 1966, p 276).
The heart of this goldfield can easily be reached by 100-180 km of excellent surfaced road from
Tananarive (sketch 7/15); most individual deposits can be reached only by 4WD vehicles,
particularly during the rainy season. The town of Antsirabe offers very good and pleasant
accommodation."
........I leave the bagger estimation to the DOC if gold were part of the equation
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In ref. to my prior post,probably best to start a new thread....
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