This image shows apparent resistivity derived from the 7200 Hz HEM data. The deep blue and red areas are electrically conductive (low resistivity) and the light green to white areas are electrically resistive (high resistivity). Note the deep blue at the water margins: this is a typical response to the highly conductive seawater. Note also, however, certain conductors northwest of Niblack -- these are NOT caused by seawater, but by something buried that is highly conductive. Massive sulfides? Altered rock?
Note the conductive sea water. Also note the broad areas in the northwest portion of the survey that are more conductive. Part of the focus of this past summers field work was to explain some of these anomalies.
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