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Project Highlights
- occurrences have been traced intermittently along strike for at least 1.3km
- 34 grab samples collected with maximum of 4.57 % U3O8
- structurally-controlled / shear zone "Michelin" style mineralization
Exploration Work
Madsen Lake property is located 16 km southwest of the C Zone, within the Lonestar Division. It is in the vicinity of Madsen Lake, Falby Lake and Rice Lake, and approximately 2 km south of Camel Lake. Between 1976 and 1978, Shell focused most of their attention to Zones 2 and 4 and carried out detailed geological mapping, trenching and chip sampling, and drilling. In 2005, Crosshair Exploration and Mining Corp. optioned the property from Triassic Properties Ltd.
Madsen Lake is underlain by felsic volcanics and sandstones of the Sylvia Lake Formation. Crosscutting diabase dikes are typically sheared along the contact with the felsic volcanic. Shear zones are usually less than 2 m wide, but are found over an area approximately 100m wide with a strike length of 1.8km. Mineralized fractures parallel to and crosscutting the sheared zones are mineralized. The felsic volcanics typically have high background radiometric values, ranging from 150-250 cps, and rarely as high as 350 cps. The localization of uranium mineralization at Madsen Lake is structurally controlled.
In 2005, Fugro Airborne Surveys conducted a high resolution magnetic and radiometric survey for Crosshair. In the summer of 2006, prospectors and geologists performed reconnaissance and detailed field investigations, as well as grab sampling. A total of 34 grab samples (27 from outcrop, 7 from float) were collected, of which 24 samples gave U3O8 greater than 0.05%, and up to 4.570%. In addition, Crosshair completed a small drill program at Madsen Lake. The 956 m in 9 holes program tested areas of high radioactivity along discontinuous outcrop. Ground exploration continued into 2007 and included prospecting and geologic mapping followed by another 2 holes drilled in 2008 bringing the total metres drilled up to 1,161.
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