| title: | Neoproterozoic and Paleozoic geodynamic events on the Fennoscandian Shield in the light of the origin and ages of the magnetic remanence components |
|---|---|
| reg no: | ETF6613 |
| project type: | Estonian Science Foundation research grant |
| subject: |
1.10. Geology |
| status: | accepted |
| institution: | TU Faculty of Biology and Geography |
| head of project: | Jüri Plado |
| duration: | 01.01.2006 - 31.12.2009 |
| description: | The southern part of the FS has experienced several geological processes during Neoproterozoic and Paleozoic. These include sedimentation and reactivation processes of the Precambrian basement, such as rifting, shearing, and deformation caused by impact cratering. However, the scale, nature, and timing of these geologically young events are poorly known. In order to add new knowledge on the geological history of the Fennoscandian Shield, palaeomagnetic studies will be carried out on reactivated Precambrian basement and on Vendian to Devonian sedimentary rocks, which, so far, have been explored appropriately only in few stratigraphic intervals. The objectives of the project are: (i) to obtain reliable palaeomagnetic data for the time interval from Vendian to Devonian in order to revise the Apparent Polar Wander Path (APWP) of the Fennoscandian Shield. The main goal of this object is to isolate reliable data on the primary remanent magnetizations from well-dated sedimentary and igneous rocks in the Fennoscandian Shield and adjacent areas on the East European platform by using modern equipments and analysing methods. The data will be used in global paleogeographic reconstructions, especially in studies of the supercontinent Pangaea, (ii) to investigate palaeomagnetic, rock magnetic, and mineralogical properties of rocks, which have undergone reactivation processes on the Fennoscandian Shield. One of the main goals of this object is to obtain more knowledge on the processes in which secondary magnetizations are acquired. It will be done by combining paleomagnetic results to rock magnetic, petrophysical, and petrological studies. The results have potential in exploration of econamically important minerals and ores if secondary remanent magnetizations are formed coevally with the mineralizations, typically due to fluid migration, and (iii) to correlate the nature and age of remagnetization processes with tectono-magmatic and geodynamic events on the Fennoscandian Shield. The main aim of this object is to recognize and date remagnetizations related either to global scale Paleozoic geodynamic processes or to local scale reheating events, originating from sedimentary, magmatic, and tectonic processes. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Mare Konsa | |||
| 2. | Jüri Plado | Tartu Ülikool | ||
| 3. | Väino Puura | |||