Drill-cores

Linked data and services:

Drill-core Database (in Estonian)

After boring the drill-core is kept in wooden boxes that host 4 to 10 meters of core depending on the diameter. There are about 30 000 drill-core boxes preserved in Estonia. Material owned by the state are stored at four different locations (see Figures 2-7). By the order of the state, Geological Survey of Estonia fixes up about 1000 boxes every year (meaning re-labelling, fixing and photographing). Information and photos of the drill-cores are saved in the database. This database contains also data used for compiling the Geological Base Map of Estonia. At the beginning of 2011, about 2600 drill-core boxes were in the ordering list.

Figure 1. Locations (yellow squares) and amount of drill-core boxes in January, 2005. Red dots indicate locations of the drill-holes the cores of which were checked for their condition in 2004.

Figure 2. Locations (squares) and amount of drill-core boxes in January, 2006. The dots indicate locations of the drill-holes the cores of which were checked for their condition in 2005. Color of the dot indicates the location where the appropriate drill-core box is stored.

Figure 3. Locations (squares) and amount of drill-core boxes in January, 2007. The dots indicate locations of the drill-holes the cores of which were checked for their condition in 2006. Color of the dot indicates the location where the appropriate drill-core box is stored.

Figure 4. Locations (squares) and amount of drill-core boxes in January, 2008. The dots indicate locations of the drill-holes the cores of which were checked for their condition in 2007. Color of the dot indicates the location where the appropriate drill-core box is stored.

Figure 5. Locations (squares) and amount of drill-core boxes in January, 2009. The dots indicate locations of the drill-holes the cores of which were checked for their condition in 2008. Color of the dot indicates the location where the appropriate drill-core box is stored.

Figure 6. Locations (squares) and amount of drill-core boxes in January, 2010. The dots indicate locations of the drill-holes the cores of which were checked for their condition in 2009. Color of the dot indicates the location where the appropriate drill-core box is stored.

Figure 7. Small rings indicate locations of the drill-holes the cores of which were checked for their condition in 2010. Big red dots mark repositories where the drill-core boxes are stored (with total amount of boxes written in brackets). All drill-core boxes (918) fixed up in 2010 are situated in Tuula repository.

Photo. An example of a drill-core box (drill-core no F259; from interval 136,8...141,0 m).

Contact person: Reet Roosalu