Exploration on SML 564 has consisted of a continuation of deep rotary mud open hole, plug and core drilling plus washing-out of existing, older Petromin "P...w" series drillholes to allow new generation downhole geophysical logging, aimed at...
Exploration on SML 564 has consisted of a continuation of deep rotary mud open hole, plug and core drilling plus washing-out of existing, older Petromin "P...w" series drillholes to allow new generation downhole geophysical logging, aimed at further extending and proving the recently discovered Early Tertiary fluviatile sedimentary uranium orebodies in an area lying between the northern Flinders Ranges and Lake Frome. Licence operator Petromin also used sidewall and conventional coring to sample logged radioactive intervals within targeted, U-bearing characteristically silty to very fine grained Lower Tertiary sands, and to gain reliable information about stratigraphic and lithological controls on the distribution of concealed uranium mineralisation. 436 appraisal drillholes including 75 partially or wholly cored holes, were put down into the U-bearing sand sequence, and gamma ray logged and sidewall sampled for laboratory assaying, on step-out grid spacings as close as 100 feet apart at the so-called Beverley prospect centred on core hole 412-39A, which had the thickest mineralised intersection, to delineate the 3 previously found uranium ore zones and to explore for other similar zones. In so doing this latest drilling has identified another, considerably larger ore lens lying slightly to the east (the 106 zone), plus another 10 much lesser ore occurrences. The calculated potentially economic and mineable uraninite reserves contained in the 3 largest known zones of the Beverley deposit (37, 39 and 106 zones) now aggregate an indicated 27.6 million pounds of U3O8, with some rich peripheral radioactive zones still remaining open along strike to the north-east and south-west.
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