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  1. Watch me on Lost Gold of the Aztecs

    Not sure, I was on the Dillman property near Kanab, UT.
  2. What is really going on inside our detectors??

    You don't have to use an RTK GNSS receiver for your hobbyist projects. Many current archeological geophysical surveys still don't use RTK GNSS while surveying. They set out a system of grids, typically 20 to 30 m on a side, then they collect their data as a series of parallel lines in opposite...
  3. Classic Geology and Geophysics books for free

    Did you get rid of these yet? If not, I would take them and pay book rate shipping. I already have some of them, but I'm sure some of the students I teach at Colorado School of Mines would be interested.
  4. Evolution NTX?

    I have never seen a single legitimate geophysical instrument produced by OKM. I think they only exist to scam gullible hobbyist treasure hunters.
  5. Searching large mountainous area

    I fly magnetometers on drones all of the time. I use either a Geometrics MagArrow (~$38K) or QuSpin Total Field Magnetometers (QTFMv2). I fly either a DJI M210RTK or M300, or my custom build ArduCopter quad copter. My main application is abandoned well heads or pipelines. I have done terrain...
  6. What is really going on inside our detectors??

    The most frustrating part about hobbyist and military metal detectors for me as a geophysicist is that they are still essentially analog output devices where the operator is listening for the whee-whee sound. In geophysics as applied to landmine, unexploded ordnance (UXO), and improvised...
  7. Watch me on Lost Gold of the Aztecs

    If you are interested in this show, you can see me on S01E06 that aired this past Tuesday, May 10, 2022. I performed an electrical resistivity tomography (ERT) survey to locate a cave. A&E Television Networks, LLC The History Channel Lost Gold of the Aztecs A Hidden Chamber S1E6 Tuesday, May...
  8. Lost Gold of the Aztecs, A Hidden Chamber S1E6

    If any of you are interested you can watch me on TV from a few nights ago. A&E Television Networks, LLC The History Channel Lost Gold of the Aztecs A Hidden Chamber S1E6 Tuesday, May 10 at 10/9c https://play.history.com/shows/lost-gold-of-the-aztecs/season-1/episode-6 Produced by American...
  9. Deep target detection

    I am still active here, what is your question?
  10. Experts, fitter, engineers, scientist, hunter, prospector !

    There are many people who try to take advantage of hobbyist treasure hunters by selling them useless junk pretending that it is real geophysical equipment. If an instrument isn’t currently being used by professional geophysicists for there money making work, then be very skeptical.
  11. Electromagnetic methods

    If you are interested in any of these topics, please let me know. As a professional geophysicist, I do these types of surveys all over the world. I also do treasure hunting consulting. I am not interested in selling you a specific instrument or some snake oil “geophysical” instrument that is...
  12. Deep search companies/contractors?

    I am a professional geophysicist who has done treasure hunting consulting in the USA and overseas. I have significant experience in mapping large areas to detect potential treasures, land mines, UXO, and IEDs. I have no interest in your treasure as long as I get paid my fee on the front end. My...
  13. Mariposa Mineralization

    Whenever I hear someone mention mineralized soil, I am interested. My PhD research all focused on measuring the complex electromagnetic properties of soils both in the lab and in the field and determining how they affected our ability to detect small compact targets. I would be interested in...
  14. Deep target detection

    I am a PhD geophysicist with 20+ years of performing geophysical surveys all over the world. I know almost every legitimate geophysical instrument manufacturer by first name and have tested prototypes for a lot of them. I realize that many hobbyist treasure hunters are taken advantage by...
  15. Deep target detection

    I am purchasing a new geophysical instrument for my business that I will use for electrical conductivity profiling and mapping. This system can map the subsurface to a depth of over 25 m (~82 ft). I will be using this for professional work but I wondered if there are any treasure hunters who...
  16. Handheld GPS unit suggestions?

    Do you not own a smartphone? All Apple iPhones as well as Android devices have built-in GNSS. There are lots of apps that can do basics GIS by recording points, lines, and polygons. I think that ther is a program called Tect-o-Track that is specifically marketed for this purpose.
  17. Searching for a Buried Cannon in Pakistan

    Resistivity is not appropriate for searching large areas for compact targets. I wasn’t sure from your post how accessible the site is. If cost effective instrumentation that can scan a large area is your requirement, then I would probably use a real geophysical instrument such as an electrical...
  18. Underground water detection

    Geophysical methods for water well locating There are a number of geophysical methods that can be used for site a water well. The choice of methods depends on a number of factors: Local geology Topography Elevation Average depth to water table Average depth of nearby wells Electrical...
  19. NEW techniq for treasure tunnel and cavity detection (EMFADscan)

    Very low frequency (VLF) instruments have been used since the 1960s. The EM16 was the first instrument manufactured by Geonics, Ltd of Mississauga, Ontario, Canada. It was used for many geophysical surveys that found lots of big mining targets. For many years the Geonics EM16 and the ABEM Wadi...
  20. Differentiating between Galvanized Steel and Copper

    Yes this can be done, but probably not with hobbyist metal detector. The type of metal, depth, and diameter of the pipe will change the decay response measured with a high end digital metal detector. The current state of the art detectors developed for detection, discrimination, and...
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