, ▁with ▁the ▁remainder ▁used ▁in ▁the ▁manufact ure ▁of ▁roof ing ▁sheet . ▁ ▁History ▁On ▁ 1 0 ▁December ▁ 1 9 2 4 , ▁a ▁sens ational ▁ore ▁depos it ▁was ▁discovered ▁at ▁F å gel my ran , ▁just ▁over ▁ 3 0   km ▁north west ▁of ▁Sk elle fte å . ▁Test ▁dr illing ▁revealed ▁what ▁was ▁then ▁Europe ' s ▁rich est ▁ore . ▁The ▁first ▁Bol iden ▁ore ▁was ▁extracted ▁in ▁the ▁spring ▁of ▁ 1 9 2 6 ▁at ▁what ▁would ▁become ▁the ▁Bol iden ▁mine ▁– ▁a ▁mine ▁that ▁would ▁prove , ▁over ▁the ▁course ▁of ▁several ▁dec ades , ▁to ▁be ▁Europe ' s ▁biggest ▁and ▁rich est ▁gold ▁mine . ▁The ▁depos it ▁also ▁included ▁co pper ▁and ▁large ▁amounts ▁of ▁silver . ▁The ▁town ▁of ▁Bol iden ▁quickly ▁grew ▁up ▁around ▁the ▁mine . ▁The ▁leading ▁light ▁in ▁the ▁development ▁of ▁the ▁Bol iden ▁company ▁was ▁Oscar ▁F alk man ▁( 1 8 7 7 – 1 9 6 1 ), ▁who ▁was ▁the ▁driving ▁force ▁behind ▁the ▁expl oration ▁work ▁that ▁began ▁in ▁the ▁second ▁de cade ▁of ▁the ▁ 2 0 th ▁century , ▁and ▁which ▁was ▁acceler ated ▁due ▁to ▁the ▁metal ▁short age ▁that ▁arose ▁in ▁the ▁w ake ▁of ▁World ▁War ▁I . ▁F alk man ▁continued ▁in ▁the ▁role ▁of ▁Bol iden ' s ▁President ▁until ▁ 1 9 4 1 . ▁Bol iden ▁AB ▁was ▁also ▁part ▁of ▁the ▁financi er ▁I var