Core samples

The repositories of the Czech Geological Survey house a singular collection of core samples, including unique rock samples or continuous drill cores from structural and other significant boreholes drilled in the Czech Republic since 1920. The samples from boreholes, drill cores or parts thereof, are permanently stored in specialized sample containers and linked to written documents, which are available in the CGS archive.

Access

Access to all stored samples is possible by prior arrangement with staff members in charge directly at the individual repositories located in Lužná, Kamenná, Stratov, Jeseník and Jílové. A documented material sample being viewed may be sampled only in the presence of an authorized employee of the Geofond Department. The sampling is documented in the sample registration forms, which also include a record of visitors to the sample repositories and of the purpose of their study. The conditions of access to the material samples are specified in the Loan and Study Room Policy for Collections, Drill Cores and Samples of the CGS (Geofond Department).

Core sample repositories

• Kamenná Sample Repository (drill cores from the entire Czech Republic)
• Stratov Sample Repository (drill cores from the entire Czech Republic)
• Lužná u Rakovníka Sample Repository (discarded CGS drill cores from the entire Czech Republic)
• Jeseník Office – sample repository (drill cores from the Zlaté Hory area)
• Jílové u Prahy Office – centre for gold deposit documentation

Services offered

• Study of core samples and possible sampling in CGS repositories.
• Search for documented boreholes with stored samples on a map in the Borehole Surveys application (Czech only).

When we are open

The core samples in the CGS repositories are accessible throughout the workweek from 15 April to 15 November by prior arrangement only (see contacts).

Handover of samples

In accordance with paragraphs 1 and 3 of section 16 of Decree No. 368/2004 on geological documentation, an organization shall provide the Czech Geological Survey, Geofond Department, with a written offer to hand over, for the purpose of permanent storage, samples collected from boreholes or mine workings deeper than 100 m as well as samples of geological significance or considerable scientific value no later than 14 days prior to their planned disposal. The Czech Geological Survey, Geofond Department, will then agree to accept the offered samples, specifically no later than at the time of their disposal (discarding).