During the June 2009 quarter Thundelarra announced a new uranium discovery at the Corkscrew Prospect within el23509.
Surface rock samples from the Corkscrew Prospect returned the highest uranium grades received by Thundelarra from the project area to date. Sample TK650719 assayed 1.37% U3O8 while sample TK650720 assayed 2.30% U3O8.
The results are considered highly significant as Corkscrew occurs in a similar geological and structural setting to the Thunderball Prospect, 3.5 kilometres to the north east.
The Corkscrew samples were taken during streamline traversing along surface drainages. Two oxidised limonitic rocks containing significant amounts of visible secondary uranium minerals were discovered in separate locations 270 metres apart. A detailed (20 metre line spacing) ground radiometric survey located a north striking radiometrically anomalous zone on the edge of a deeply incised stream in the vicinity of the two rock samples. The precise source of the highly mineralised boulders was not located, but is expected to be nearby and probably masked by shallow scree cover.
Thundelarra has now identified three prospects, Thunderball, Corkscrew and Bella Rose that all occur on the western limbs of north plunging antiforms in close proximity to the Hayes Creek Fault Zone (see attached plan). To date only Thunderball has been tested at depth by drilling, with very positive results.
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