What is consider highly mineralized soil?

[Enimor]

Sorry if this has been covered but as I axiously await for my CTX to arrive I had a question on what is considered high mineralization. For example, when the suggested sensitivity is 16 or below?

Thanks

 

[TheMarshall]

Sorry if this has been covered but as I axiously await for my CTX to arrive I had a question on what is considered high mineralization. For example, when the suggested sensitivity is 16 or below?

Thanks

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Hello Enimore.

I can give you a couple of figures for my E-Trac and Fisher F75.

These numbers are taken from my own constructed 'Harsh mineralized test site' established these past 20 years, in my garden.

For the Fisher F75, on the ground, using its Fe graph, reads____ One. The equivalent effect on E-Trac reading is____ THREE

For the Fisher F75 raised about 3 inches____Nought-point-three. The E-Trac_____FIVE

The test site was modeled to replicate the worst conditions I've personally experienced here in the UK areas of Norfolk, and in some North Wales fields which were also littered with iron ore rocks.

I'm sure the lads there in the USA will be able to donate readings from your VA hot spots that Andy and Daniel mentioned in other posts.

I used the word relative, to warn you that any sort of numbering assigned to Fe mineralisation measured by detectors are not absolute, but rather a rough indicator.

It take a laboratory process to measure soil samples for serious quantification, but even then only using specific frequencies...far lower than normal detectors use.

As detectorists, we can only compare either the effects,.... or similar machine readings.....even so...different heads, sizes, and frequencies used, only add more variability to any results.

In other words...its a quagmire or quicksand of a subject when trying to be too specific regarding measurements....

TheMarshall....p.s. Best wishes and 'Good hunting' with your new CTX 3030.

P.P.S.

If you have been following the other related post regarding Mineralization and PI detectors, you may be interested to read Bruce Candy's defenition of the class of unit you are buying which employs his FBS technology....

I give you Bruce Candy's words...

Basic operation.
Written by Bruce Candy.

V
V
V
V
V

Different technologies.
Metal detectors transmit a variety of different waveforms all with different advantages and disadvantages. The most common waveform is


VLF which is basically a single frequency sine-wave.


The next most common is PI, the basics of which are given in section 1.2.1. Minelab​

 

[GpSnoopy]

Need to include the rest of that paragraph to get the full context. He is describing "3" basic technologies and not including BBS and FBS as PI's. The sentence on P.I. ends at "section 1.2.1." The sentence I bolded is completely separate.

Metal detectors transmit a variety of different waveforms all with different advantages and disadvantages. The most common waveform is
VLF which is basically a single frequency sine-wave. The next most common is PI, the basics of which are given in section 1.2.1. Minelab

 

[Enimor]

-- moved topic --

 

[Jeff Harris]

Downtown Phoenix Arizona. Fact. Reading 89-93 on my F75