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Advanced Processing of Airborne FDEM Data for Improved Imaging of Karst Conduit Networks in the Region of Tulum, Mexico
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, First European Airborne Electromagnetics Conference, Sep 2015, Volume 2015, p.1 - 5
Abstract
Summary
The presented study is part of a series of international research cooperations, started in the year 2007 and still ongoing. The study area is located at the east coast of the Yucatan Peninsula, Mexico, and comprises part of the Sian Ka’an biosphere reserve and the town of Tulum, Quintana Roo. Three airborne surveys, conducted in 2007, 2008, and 2015 by the Geological Survey of Austria, covered an area of some 300 square kilometres including cave systems already mapped by exploration divers. First processing of airborne electromagnetic data revealed a clear signature from known caves but furthermore the picture of a vast unexplored hidden conduit network. However, lateral and depth resolution was limited due to measurement drift and noise as well as due to specific behaviour of the applied inversion technique. Newly developed algorithms for careful post processing of the AEM data and inversion results improve the signal to noise ratio significantly and enable the imaging of well defined structures in the underground. So, the AEM-method is proved its ability to quickly deliver crucial structural information of karst water regimes over a difficult accessible area and with unique depth information compared with previous results.
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