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Geological Society, London, Special Publications; 1994; v. 79; p. 233-239;
DOI: 10.1144/GSL.SP.1994.079.01.20
© 1994 Geological Society of London

Case histories

Database management at the Lisheen deposit, Co. Tipperary, Ireland

J. Barry1, J. Guard1 & G. Walton2

1 Crowe, Schaffalitzky & Associates, Newstead, Clonskeagh, Dublin 14, Ireland
2 Chevron Mineral Corporation of Ireland, Newstead, Clonskeagh, Dublin 14, Ireland

The Lisheen Zn-Pb-Ag deposit was discovered by the Chevron Mineral Corporation of Ireland/Ivernia West Plc Joint Venture in 1990. The mineral resource estimate is 20.5 Mt grading 13.3% Zn, 2.3% Pb and 35 g/t Ag. Massive sphalerite-galena-pyrite mineralization occurs at the base of the dolomitized, lower Carboniferous Waulsortian limestones and is bounded to the south by a shallow-dipping normal fault. The deposit is subdivided into three areas: the Main, North and Derryville Zones.

Lisheen diamond drill hole data are stored in a relational database management system called TECHBASE with graphical output to AutoCad. Coding and in particular ‘nested’ coding facilitates data filtering and efficient editing and interrogation of data. The coding system has the flexibility to evolve as the multi-disciplined and multi-sourced data at Lisheen become more complex. Routine tasks which require frequently-used sequences of commands such as the generation of stick sections and data reports are automated by the use of macros (runlogs). Faster processing and editing of data considerably increases the generating speed of sections, maps and data reports which results in faster, and more accurate calculation of mineral resource estimations. ‘Technicn’ is a facility withing TECHBASE which permits parameter substitution within macros through a simple memo-driven user interface.