Radium Geochemistry in Sediments Responds to Uranium Mineralization at Bancroft
	Geochemical contour map from 1968 samples 95 sediment samples from streams and lakes. Clastic and organic sediment. 38 locations have both types, clearly separate and distinct. When both types present radium is higher in organic type. Radium values in the two types rationalized on a curve and plotted and contoured on the same map (shown). Uranium mineralization is concentrated along the belt of syenitic rocks and nepheline gneiss which occupies the contact between plutonic rocks to the northwest and metasedimentary to the southeast. Note the high values associated with the mineralization and contact Samples downstream from Faraday Mine also high but left off the map because possibly contaminated. Published in Canadian Mining Journal, May 1969, p. 75-76
Drainage point map from 1968 and 1969 samples 258 sediment samples. See notes above. From Ph.D. thesis, Queen's University, 1970 Click here for more on radon in exploration	Analytical Technique for Radium in Sediment You need 20 grams of sample. Cover the sample with water, let the radon grow it to equilibrium, and measure radon in the water in the normal way. Half-life to reach eqilibrium is 3.8 days. Fine sediments collected wet and kept under water might remain in equilibrium. In the same way you can also measure radium in plant parts, soil, crushed rock etc. No need for crushing or chemical attack. INSTRUMENTS 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 health physics, earthquake prediction, and evaluation of hydrocarbon and NAPL contamination. In the radon business since 1968, our latest major instrument update was 2011. Modern, low-power, field-rugged electronics. Some earlier versions still working after 35 years. Winter and summer, from the Sahara Desert to the Canadian Shield, our instruments have faced up to severe field conditions. 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. Click here for pictures of instruments. Click here for or other instruments, components and assessories we provide For instruments contact R.H. Morse & Associates Ltd. 1-416-269-9979 morse@finderschoice.com skype: robert.morse.toronto Multilingual consulting and training (if required). Robert H. Morse, Ph.D., P.Eng. June 29, 2007