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一、导言阿尔滕贝格(Altenberg)锡矿床是一个大型云英岩矿床。它的标志是1620年发生的一次漏斗状崩落。该崩落矿带被一个洋葱状的稳固矿带所包围,后者约占总储量的
I. INTRODUCTION The Altenberg tin deposit is a large dolomitic deposit. It is marked by a funnel-like collapse that took place in 1620. The caving zone is surrounded by an onion-like, stable ore belt that accounts for about the total reserves