Radon surveys are effective for uranium exploration in the winter.
SOIL COVERED BY SNOW
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Use the same portable radon detector as for radon in soil gas.
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Use the same formula to resolve thoron and recognize false anomalies due to soil permeability.
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Radon does not migrate through solid, impermeable rock;
therefore, it is no surprise to find no radon in the snow overlying bare radioactive outcrops.
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On the other hand, weakly anomalous soils can be readily detected by radon in the overlying snow.
See www.finderschoice.com/radon/faraday.php
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This migration of radon from soil into overlying snow is observed even in the case of
deeply frozen clay soils as in Northern Saskatchewan in March.
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The discovery hole at McClean Lake North was located at a strong radon-in-snow anomaly.
Click here for McClean Lake details.
FROZEN LAKES
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Radon measured in lake water collected by drilling through the ice played a key roll in the
discovery of the Patterson Lake South deposit.
Click here for details.
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Water and/or sediment samples can be collected from frozen lakes by drilling the ice with an
ice auger. Probes can be lowered for bottom samples.
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Detailed surveys are carried out on a grid pattern. For reconnaissance, one or a few samples
are collected from each lake.
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Samples are analysed for radon and radium using the same equipment as above.
For immediate results our instrument can be set up in a tent,
or pulled from point to point in an ice fishing hut.
Or the samples can be sent back to a central location. For radon the samples must be analysed within a week. Samples can also be analysed for uranium and other elements.
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For details of other lake surveys, click
Kiggavik or
Midwest Lake.
ARCHIVED SAMPLES
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Samples of soil, sediment, crushed rock, water or vegetation archived from earlier surveys can also be analysed for radium.
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We can use pulps or coarser fractions. Sometimes as little as a gram or two will suffice.
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INSTRUMENTS
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We measure: radon - radium - thoron - radon daughters - alpha radiation.
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The
Lucas cell
is recognized as the most sensitive and reliable method for these elements.
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Our instruments are used around the world in exploration for uranium, oil & gas, groundwater and hydrothermal,
and in environmental protection, health physics, earthquake prediction, and evaluation of hydrocarbon and NAPL contamination.
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In the radon business since 1968, our latest major instrument update was 2015.
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Modern, low-power, field-rugged electronics. Some earlier versions still working after 35 years.
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Continuous real-time monitoring and data recording.
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Winter and summer, from the Sahara Desert to the Canadian Shield, our instruments have faced up to severe field conditions.
- Intrinsically safe functions.
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Sensitive to geochemical trace levels necessary for radon in lake water and for radon-thoron isotope ratios.
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Can work in a tent without electricity or be carried from point to point in the field.
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50 readings per day. Results available immediately.
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Rechargeable battery pack good for a long day in the field and recharges in a few hours.
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Can be operated by junior personnel if carefully supervised.
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Same instruments used for radon and radium in soil, sediment,
plant parts, rocks, water, soil gas, air, and snow, and for radon daughters in air.
- EPA compliant.
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Click here for more details of instruments.
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Click here for or other instruments, components and
accessories we provide
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Technical specification sheets and pictures of our instruments provided on request.
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Multilingual consulting and training (if required).
For instruments contact
R.H. Morse & Associates Ltd.
1-416-269-9979
morse@finderschoice.com
skype: robert.morse.toronto |
Robert H. Morse, Ph.D., P.Eng.
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