Mineral resource classification

Under Bauwürdigkeit or mineability is understood in the mining and economic geology of the result of the evaluation of a raw material deposit in terms of economic recoverability.

" Another point of view is carried into the carbon stock calculation by the concept of Bauwürdigkeit. Workable is a deposit when their degradation is economically possible, ie when the operating capital employed appropriate interest rate. "

If, during the assessment, the Bauwürdigkeit out, then a deposit from the deposit.

Evaluation criteria

Evaluation criteria include, without limitation:

• Quality of the deposit (minimum, average salary )
• Stock amount
• Ceilings for admixtures and intermediate means,
• Cost of development,
• Costs of depletion and promotion,
• Cost of treatment,
• Transport costs,
• Recoverable product price,
• Recoverable volumes.

Within a deposit, there may be bauwürdige and unbauwürdige subareas.

Change the Bauwürdigkeit

Change one or more criteria, then a deposit covered by the Bauwürdigkeitsgrenze or one occurrence convert to a deposit.

• For example, while coal for decades has been the basis of German heavy industry, their degradation was becoming uneconomical. Here, the parameters of product price and costs of degradation and the promotion have been impacted. As a result, the German hard coal is despite government subsidies currently not competitive, it is unbauwürdig.
• Due to price increases in the commodity markets, however, long known occurrences are workable. As an example, the copper shale deposit Spremberg / loop / gray stone called, which should start promoting 2016.