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June and July 2012, Data Consultation

  • Santa Monica

GMT interpreted subbottom profiler data for Fugro Geosciences to produce thickness contours of Holocene sediments and profiles along the centerlines of two proposed cable routes within Santa Monica Bay, California.

  • KLU2 – Alaska

GMT performed a site survey interpretation for Watson Company in Anchorage, Alaska of the Kitchen Lights Unit #2 drill location in advance of a rig move for Furie.  This project involved processing and interpreting side scan sonar, subbottom profiler, and minisparker data to determine seabed characteristics and the depth from the seabed to the top of the Sterling Formation.  The extreme tides in the Cook Inlet have produced some very interesting bedforms there.

  • Fugro Atlantic

We interpreted ultra-high resolution (1600 kHz) side scan sonar and magnetometer data for a survey by Fugro Atlantic in the Hampton Roads area of Virginia.  The survey area is part of a port expansion for the Corps of Engineers.  The side scan survey data were remarkable in that resolution was on the order of 1 centimeter, and objects as small as tires (with diameters of 16 inches) were clearly resolved.  For this project, we logged 440 sonar contacts, and 470 magnetic anomalies with intensities greater than 50 gammas.  We also did a grid of magnetometer values corrected for local total field as recorded with a magnetometer base station set up by Fugro.  Detected objects included cables, tires, shipwrecks, wooden poles, pipes and various debris.  The positioning was such that detected objects tied to better than 2 meters.  Used in conjunction, ultra-high resolution sonar systems and precision cesium beam magnetometers are ideal tools for surveys of this kind.