Open AccessAudiomagnetotelluric measurements across the Lake Ladoga–Bothnian Bay zone in Central Finland
Author(s) -
Kaikkonen P.,
Pajunpää K.
Publication year - 1984
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1984.tb01959.x
Subject(s) - geology , schist , bay , basement , residual , seismology , geomorphology , geochemistry , geodesy , mineralogy , metamorphic rock , oceanography , archaeology , geography , algorithm , computer science
Summary. A group of 64 stations among 140 AMT measurement sites in Central Finland forms a profile about 220 km long. The profile starts from the Svecokarelidic orogenic belt (1800–1900 Ma) and traverses the Karelidic schist belt to the Presvecokarelidic basement (2600‐2800 Ma). The data obtained are analysed and are presented as apparent resistivity profiles, pseudosections and residual profiles at discrete frequencies between 8 and 3700 Hz. The distribution of the measured apparent resistivities in the research area shows that there are observable differences between different geological units. A 1‐D interpretation is carried out at every station, after which a 2‐D model is constructed for the whole profile and its AMT response is calculated numerically with the finite element technique.