Geostokos Limited
Specialists in Mineral Resource and Reserve Estimation

Experience by commodity


Consultancy and client information (1990->):
Mine planning and valuation

Statistics and geostatistics

Software advice
and development

Environmental issues

For current consultancy
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Isobel Clark pre-Geostokos

Geostokos pre-1990


Geostokos Limited
was floated on 1st January 1983 as an independent consultancy company serving the Minerals Industry worldwide. The Company is currently owned by two shareholders and the main principal consultant is Dr Isobel Clark.

We offer expert and independent services in the evaluation of resources and reserves using the facilities of statistics, geostatistics and computer applications. We operate with the minimum of permanent staff, drawing on the services of free-lance specialists when the need arises.

Our consultancy work is largely in the field of mineral resource and reserve estimation. Most often, our involvement is at feasibility or even pre-feasibility stage. However, we cover the whole spectrum of mineral resource and reserve estimation, from bankable statement of feasibility study through to working at the grade control stage in a producing mine.

Within this narrow field of specialisation, we have experience in a wide variety of minerals and mining methods. Whilst the earliest of our activities was concentrated on base and low-concentration metals, more recent experience has been gained in the evaluation of precious metals. Our first contact with coal applications dates back to 1979, before the formal incorporation of Geostokos Limited. Mineralisation types range from stockwork through hydrothermal veins to massive sulphides. Mining methods included in various feasibility studies include back-stoping, cut and fill, open stoping, room and pillar and (of course) open pit block-by-block evaluation.

Since setting up Geostokos Limited, our field of activities has widened a little to include hydrogeology, environmental pollution and soil science parameters. In particular, we were involved for four years in the study of a proposed site for a high level nuclear waste repository in the USA. This included detailed study of hydrological characteristics of aquifers in the Texas Panhandle. Since then 'alternate' activities have ranged from the protection of off-shore sea-birds from wind farm development to assessing bug infestions in Florida orange groves.