Barama Roads Project
In September 2001 a geological and geochemical investigation
was made of an area with abundant roads built by the Barama Logging Company
in north-west Guyana.. The area has a long history of gold mining, and
includes many known mineral occurrences such as Arakaka, the Perseverence-Monosse
Goldfield, Anson Ck and Hyma Ck. The “Eyelash area” where
there has recently been a great deal of small scale mining activity is
located just south of the project area. Some of the Barama Roads Project
area has previously been explored by BHP and/or Golden Star, but the southern
part of the area investigated has not been subjected to
modern exploration.
Geochemical results show that compared to the rest of
Guyana much of the area is highly anomalous for gold, with generally a
good correlation between anomalous areas, and areas with known gold occurrences.
Thirty one –80# stream sediment samples assay 0.1-0.5ppm Au, while
another 26 samples contain 0.5-5.1ppm Au. The whole area is also highly
anomalous for As in stream sediments. Seven stream sediments contain over
100ppm As possibly related to a N-S structure.
A distinct zone in the southern part of the project is
anomalous for copper in stream sediments and BLEG samples, with 8 SS samples
with 125-220ppm Cu in one area. The same areas also has a very consistent
low level Pd anomaly, with associated Sb & Cd. Modest Ni, Co &
Cr anomalies are probably related to the geology. The geological map of
this area is still being refined, but radar images suggest that this is
an area of meta-volcanics (including meta-basic rocks) with E-W banding,
possibly a fold core, just north of a granite intrusion.
Much of the area is covered by valid medium or large
scale licences, but there are some gaps where drainage geochemistry suggests
there is good potential for alluvial or primary mineralisation. By coincidence
all areas not already claimed have reasonable to very good gold drainage
geochemistry. Some of these areas are already known as historical mineral
occurrences, but some have no history of mining in the literature. These
areas are now being offered to the public through public auction. The
following maps summarise available data.
Gold Geochemistry Summary Map.(253KB)
Copper Geochemistry Summary Map.(236 KB
Arsenic Geochemistry Summary Map.(232KB)
JERS (Japanese Earth Resources Satellite Radar)Map.(754KB)
Block Summary Map.(238Kb)