$150 What frequency can detect 1/4 inch nuggets at 1000+ feet down in the earth?

I need an engineer that works with radio waves. Let me know your skills and why you would be able to complete my project. What frequency can detect 1/4 inch nuggets at 1000+ feet down in the earth? I will not be drilling any holes. I need a device designed that will send out a frequency or multifrequency that can travel deep into the earth and then detect the signal reflections to determine the metal/mineral it is. The signal must be able to go deep into the ground and receive signal reflections. I will need input/output information so I can have a program made that will 3D graph the signal reflections and identify the different metal/minerals. Unles you are able to also make the program. You will provide a list of all parts needed from usa based suppliers, and write the program for the pic controller The device will need to be able to use multiple receiving antennas. Must be safe for the user to use and operate. If interested in my project contact me for further discussions. NDA will need to be signed for full project details.