Three dimensional finite element modeling of inloop transient electromagnetic measurements on a lake
Lake sediments are mainly archives on paleoclimatic fluctuations, geomagnetic field variations and volcanic activities.Therefore, the thickness of them is very important for paleoclimatic studies. To determine the thickness of sediments beneath the lakes a floating TEM field-setup with a transmitter size of 18x18m2 was developed which enables inloop TEM measurements on the surface of lakes. Due to its modular design it can be handled by two operators and is easy to transport.Lake Holzmaar in Eifel/Germany is a maar lake and its lacustrine sediments provide paleoclimatic proxy data. An extensive inloop TEM survey was carried out on the surface of this lake to determine the thickness of its sediments. The TEM data collected can be explained well by means of three dimensional Finite Element Modeling, resulting 55m sediment thickness beneath the 20m water of the lake.
vulcanic maar TEM on lake sediment thickness
B Tezkan L Mollidor R Bergers J Loehken
Institute for Geophysics and Meteorology, University Cologne, Germany
国际会议
The 19th International Workshop on Electromagnetic Induction in the Earth(第十九届国际地球电磁感应学术研讨会)
北京
英文
41-45
2008-10-23（万方平台首次上网日期，不代表论文的发表时间）