|
| | Abstract | | Airborne electromagnetics(AEM) is a method to survey underground by means of electrical resistivity. It has a merit to survey both land and sea simultaneously. While conventional AEM can reveal resistivity only to a depth of 300 m on land, we succeeded to increase the survey depth to 1000 m by employing grounded electrical source airborne transient electromagnetics, or GREATEM. Here, we applied GREATEM to a coastal area for the first time. The Kujyukuri coastal plain, Boso Peninsula, was selected for our study. This area is suitable because shallow seawater develops and enough resistivity data are available by grounded electromagnetic survey on land, electrical resistivity measurements at sea, and borehole logging. As a result, it was found that GREATEM can reveal resistivity structure in the coastal area to a depth of 300-350 m within 1 km offshore. |
|
|
|
| |
|