Radium in dry stream sediments
  • Radium can be determined in sediments in dry stream beds, and anomalous values point to uranium exploration targets upstream.

  • - Place about 40 grams of sediment in an 8-ounce jar.
    - Fill the jar with radon-free water.
    - Let it sit a week or two for the radon to grow in.
    - Stir it up, decant the water into the degassing system and count the radon in the normal way.
    - Grain size of the sediment is not too important. You can use much coarser than 80 mesh. You don't need to grind the sediment, or use any chemical attack.

  • You can set up the radon/radium lab in the field. It is battery operated. But you have to wait for the radon to grow in. See the growth curve.

  • Radium is less soluble than uranium, and it would not be surprising to find that these dry sediments have been leached of much of their uranium, leaving behind a detectable radium anomaly.

  • Most of the gamma radiation used in uranium exploration comes from radium daughters, particularly bismuth-214. However, the radium anomalies we found can only be found with our geochemical technique: the gamma radiation is not sufficient to be detected by gamma-ray scintillometer or spectrometer.

  • We found radium anomalies in dry sediments downstrem from uranium deposits at Mount Painter, Radium Hill, and Mary Kathleen.

  • We measure: radon - radium - thoron - radon daughters - alpha radiation.
  • The Lucas cell is recognized as the most sensitive and reliable method for these elements.
  • 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.
  • In the radon business since 1968, our latest major instrument update was 2015.
  • Modern, low-power, field-rugged electronics. Some earlier versions still working after 35 years.
  • Continuous real-time monitoring and data recording.
  • Winter and summer, from the Sahara Desert to the Canadian Shield, our instruments have faced up to severe field conditions.
  • Intrinsically safe functions.
  • Sensitive to geochemical trace levels necessary for radon in lake water and for radon-thoron isotope ratios.
  • Can work in a tent without electricity or be carried from point to point in the field.
  • 50 readings per day. Results available immediately.
  • Rechargeable battery pack good for a long day in the field and recharges in a few hours.
  • Can be operated by junior personnel if carefully supervised.
  • 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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  • Technical specification sheets and pictures of our instruments provided on request.
  • Multilingual consulting and training (if required).
For instruments contact
R.H. Morse & Associates Ltd.
skype: robert.morse.toronto

Robert H. Morse, Ph.D., P.Eng.
October 15, 2008
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