Aline
Not a specific recommendation or otherwise but a general observation.
The choice will depend on what you want to do with it and who is going
to be using it.
If it is to be used by a relatively well educated geophysicist or
geologist then the choices are open and the KT series are a fine choice
but if it is to be used by field assistants, particularly in non-English
speaking countries or in countries with relatively low levels of
education, then I have found that the KT series, after the KT-9, are a
poor choice and ultimately lead to rubbish data. The problem is that the
modern Kappameters correct for sample size internally and have a core
sample mode which obviously needs to know the size of the core. This
defaults to 1" and resets on shutdown. Most of my clients use field
assistants to acquire mag sus data on core in third world countries
because the geologists in those places, in general, do not value the
information. I have had three using KT-9 and KT-10 series meters and on
checking the meters all were set to 1" (~AQ) core size despite all the
core being either NQ or HQ. One had 25km of core measured this way and I
could not be sure that they had always done it wrong or whether at some
point(s) they had set the size correctly. For clients with Kappameters
I encourage them to not read in core mode and not allow the meter to do
the correction and just keep it as simple as possible. Measure apparent
susceptibility and note the core or sample size in the field sheet and
then do the correction back in the database - at least then it can be
uncorrected if wrong. I use the correction factors for the KT5 as a
replacement. I also encourage them to make a standard and read that each
time they start reading core so that they know they have the right
settings. You can buy good standards or go down to the creek and find a
fine grained boulder of andesite or other magnetic basalt and cut some
nice flat faces on it, ensuring that it does not get smaller that 10cm x
10cm x 10cm.
I'd also note that if the main use of the meter is to be used in field
work then the smaller MS-30 is the size of a Sunto compass, fits in your
pocket and saves digging into a back pack or carrying loose objects on
your belt. It doesn't offer conductivity though.
Cheers
Kim
On 15/09/18 03:35, Aline T. Melo via SEGMIN wrote:
Hello,
Does anyone has experience with KT-20
susceptibility/conductivity/ip-resistivity meter (
http://www.terraplus.ca/products/pdf/KT-20.pdf)?
Any pros and cons?
I am looking for recommendations to buy a susceptibility meter, and
appreciate any help.
Thanks!
Aline
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Kim Frankcombe
Senior Consulting Geophysicist
/ExploreGeo/
PO Box 1191, Wangara, WA 6947 AUSTRALIA
Unit 6,10 O’Connor Way, Wangara, WA 6065, Australia
Phone+61 (0)8 62017719- if your call goes to voice mail, leave a
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