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.
  • Intrinsically safe functions.
  • Sensitive to geochemical trace levels necessary for radon in lake water and for radon-thoron isotope ratios.
  • immune to beta and gamma radiation.
  • one monitor works with a number of (less expensive) detectors.
  • 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 etc.
  • Same instruments used for radon and radium in soil, sediment, plant parts, rocks, water, soil gas, air, snow, food, and for radon and thoron daughters in air.
  • Winter and summer, from the Sahara Desert to the Canadian Shield, our instruments have faced up to severe field conditions.
  • In the radon business since 1968, our instruments are updated regularly with the most recent major re-design in 2015. Modern, low-power, field-rugged electronics. Some earlier versions still working after 40 years.
  • Continuous real-time monitoring and data recording.
  • RS232 port/pc software.
  • User programmable measurement intervals, sample and count periods and alarm level settings.
  • Can work in a tent without electricity or be carried from point to point in the field.
  • 50 readings per day. Results available immediately.
  • Portable. 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.
  • EPA and CE Mark compliant.
  • Click here (www.finderschoice.com/rn) for more details of our radon instruments, and for other instruments, components and accessories we provide.
  • Technical specification sheets and pictures of our instruments provided on request.
  • Multilingual consulting and training (if required).
For instruments contact

Robert H. Morse, Ph.D., P.Eng.
October 15, 2008
Click here for technical details and other applications of our radon instruments.

Copyright 1968 - 2018, R.H. Morse & Associates Ltd., all rights reserved.