The Geoservices Division is the geological survey section of the Commission. Within this division are:
The mineral property administration, which handles all applications for medium and large scale mineral properties.
The cartographic section, which stores geological maps and diagrams for work done by the survey during the last 120 years, and manages maps recording the positions of Prospecting Permits, Licences and Permissions for Geological and Geophysical Surveys.
The field section, which performs geological fieldwork throughout Guyana to investigate the geology and mineral deposits and compiles relevant geological reports. Work done as part of many of the recent field projects has included regional geochemical sampling. Sampling and analytical methods used are the same for each project, eventually allowing data to be combined in the first geochemical atlas of Guyana. Samples of available data is available below as Adobe Acrobat files. Geochemical sampling techniques employed are those commonly used in wet tropical areas, with bulk -30# sediment samples taken using a flocculent, and a -80# fraction separated in the laboratory. All sample processing and analysis is currently being done by Actlabs in Canada. There a 2kg -30# split is analysed for Au, Ag, Cu, Pd and Pt using a cyanide leach method (BLEG), and the -80# fraction is analysed for "Au plus 48" using INAA and ICP.
Eight reports on geology, geochemistry and structure covering a total area of approximately 6000km2 in northern Guyana are available both as paper copies and as CD's. Assay results have been received for another eight project areas (Kaburi, Barama Logging Roads, Kuyuwini, Pashanamu, Kurupukari, Mara Mara, Demerara Headwaters, West Auroraand Demerara Bend), and reports are under preparation. Fieldwork has been done in the Kaburi Gap and Omai areas (assays awaited). Details of recent reports are listed below.
A chemical and sample preparation laboratory, with AAS and Fire Assay capability.
A petrology laboratory with facilities for making thin and polished sections, a variety of microscopes, and over 250,000 historical thin sections.
A GIS / Computer section with facilities to both scan and plot A0 maps. All of the recent work in this division has been recorded in an integrated GIS database, and all new maps and reports are available on CD. Digital basemaps are being prepared from scanned original 1:50,000 topographic maps. All historical maps are being scanned, and stored on CD, on a project basis. An accurate digital map of mining licences is being compiled, as is a new mineral occurrence and a new geological map of Guyana. These geological and mineral occurrence maps are being updated at the end of each project. Maps are available as 1:1,000,000 scale plots, and on CD as an ArcView Project / MapInfo workspace and associated files.
A drilling section with equipment for Diamond and Bangka drilling.
Please ask for information on services available to the public.
This Project Summary Map (166Kb) in Adobe Acrobat format illustrates the location and status of recent Geoservices Division Projects
A number of regional maps summarising the geology, mineral resource potential, geochemistry and licence status are available or will be available soon as paper prints, and/or on CD as GIS data and Adobe Acrobat pdf files. These include:
Geological Map of Guyana (1,112kb).
Mineral Exploration Map of Guyana (1,866kb).
Licence Status Map of Guyana (389kb).Draft Geochemical Atlas of Guyana : Au. As. Cu. Sb. Ta. (Files approx 1mb each)