| Autor: |
Karinen, Tuomo, Lahti, Ilkka, Konnunaho, Jukka |
| Předmět: |
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| Zdroj: |
Special Paper of the Geological Survey of Finland; 2015, Issue 57/58, p121-134, 14p |
| Abstrakt: |
In this article, we present 3D geological models of the Hietakero and Vähäkurkkio areas in northern Finland and discuss their geological evolution. The models were reconstructed using 3D potential field inversion. It is generally required that a model is in harmony with existing data, but we recognize that during model reconstruction it is also important to consider the geological evolution of the study area. This type of modelling, which considers the 3D history of a certain area, is referred to as 4D modelling. It is likely that the geological evolution of Hietakero began with the sedimentation of quartzites and eruption of volcanic rocks. This was followed by a tilting episode during which a gabbroic intrusion comagmatic with volcanic rocks was emplaced. Subsequent folding episodes resulted in the fold interference pattern of the area. The geological evolution of the Vähäkurkkio area is envisaged as folding of a volcano-sedimentary sequence that deposited during transgression. The vergence of folding is due to later thrusting from the east. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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