| title: | Processes of decay of the Ordovician carbonate rocks and assessment of conditions of the historical objects in Tallinn |
|---|---|
| reg no: | ETF5017 |
| project type: | Estonian Science Foundation research grant |
| subject: |
1.10. Geology |
| status: | completed |
| institution: | Institute of Geology at Tallinn Technical University |
| head of project: | Liidia Bitjukova |
| duration: | 01.01.2002 - 31.12.2004 |
| description: | This project purposes to add new aspects into the traditional geological study of carbonate rocks in Estonia. This project's aim is to study the processes of weathering and decay of Ordovician carbonate rocks used for building of historical and culture objects in Tallinn. Damage of building stones is widely observed in Europe where the pollution situation has been for many years, and still is, quite serious. The problems of preservation of stone engaged the attention of many scientific institutions in Europe and a such kind of investigations is very actual for Tallinn as an industrial center too. Our comprehensive study will include besides the well-known lithological, geochemical, mineralogical methods also a new computerised X-ray tomography investigation of building stone. Complex analysis and careful selection of the historical objects for the study will permit to determine the conditions and assess the intensity of degradation processes what are controlled by natural and anthropogenic factors. We are going to estimate the trends in variation of chemical composition and its influence on physical properties of the rocks during the time, to study the relationship between chemical and physical parameters. Previous detail studies of the composition and physical properties of the numerous samples (more than thousand) of unaltered Ordovician carbonate rocks collected from main outcrops and boreholes in Estonia by the participants of the project created the base for the interpretation of main natural geological factors that cause alteration and decay of the rocks. On the base of the obtained data the database for the future monitoring will be completed and the recommendations for selection of the optimal technique for the diagnosis and conservation of the historical objects will be suggested. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Liidia Bitjukova | Institute of Geology at Tallinn Technical University | Senior scientist | |
| 2. | Merike Limberg | EAA | magistrant | |
| 3. | Jaak Nõlvak | IG TTU | scientist | |
| 4. | Aada Teedumäe | IG TTU | scientist | |