Abstract
Mt Todd lies towards the south end of the Pine Creek Geosyncline, sandwiched between the Cullen Batholith and the Edith Falls Basin, in an area of regionally metamorphosed sandstones, siltstones and shales. The Batman deposit, some 3 km west of Mt Todd is a sheeted quartz vein system hosted within greywackes of the Palaeoproterozoic Burrell Creek Formation (Finniss River Group). The gold-bearing quartz veins, trending 010-020 and dipping 60-70E, are commonly 0.5 to 5 cm wide and occur at intervals which are from 10 cm to 1 m apart. Gold tends to be restricted to the quartz veinlets and immediately adjacent country rock. Grade Control utilises two 4 m 'collar' samples which are collected from each 8 m production blasthole. The irregular distribution of the quartz veins and erratic gold mineralisation has resulted in a disseminated 'salt and pepper' type of gold occurrence, with only a poorly defined footwall. Delineation of ore and waste blocks for mining uses an approach which combines the smoothing effect of kriging with a pragmatic view of the raw data. Large ore blocks with simple geometry help to minimise mining dilution, reduce block variance and give good reconciliations to interpreted ore tonnes and grade. Daily mine face advance is reported against truck counts and provides continual comparison with budgeted production. All data processing uses Gemcom software, together with Lotus spreadsheets.
Original language | English |
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Title of host publication | Proceedings of the 1994 AusIMM Annual Conference, Darwin, August 1994 |
Subtitle of host publication | Australian Mining Looks North - the Challenges and Choices |
Editors | C.P. Hallenstein |
Place of Publication | Melbourne |
Publisher | Australasian Institute of Mining and Metallurgy |
Pages | 109-115 |
ISBN (Print) | 0949106976 |
Publication status | Published - 1994 |
Externally published | Yes |
Event | 1994 AusIMM Annual Conference: Australian Mining Looks North - the Challenges and Choices - Darwin, Australia Duration: 5 Aug 1994 → 9 Aug 1994 https://www.ausimm.com/publications/conference-proceedings/1994-auslmm-annual-conference-darwin-august-1994/ |
Publication series
Name | Publication Series |
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Publisher | Australasian Institute of Mining and Metallurgy |
Number | 5/94 |
Conference
Conference | 1994 AusIMM Annual Conference |
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Country/Territory | Australia |
City | Darwin |
Period | 5/08/94 → 9/08/94 |
Internet address |