Field Exploration Geology Vol. IX
A sneak peek into the 9th year of our biggest field exercise ever... This time we went to the area of the Western Carpathians
Sulphide mineralization fieldtrip
On the April 4th the short one-day field trip took place, attended by our Chapter´s current and former members. The course was focused on sulphidic mineralization in the surroundings of Havlíčkův Brod. The first stop was geologically unique sulphide liquation deposit Staré Ransko, where massive pyrrhotite and sphalerite occurs partly in quartzites and partly in parent gabbros and other ultramafic rocks. The deposit was surveyed in past and underground mining took place here, too. Our guides at this site were Vojtěch Wertich (Czech Geological Survey, currently researching the deposit) and Karel D. Malý from the Aurum Global Exploration company (currently exploring the deposit). At the old mine dumps we found several pieces of massive pyrrhotite, chalcopyrite and sphalerite. Next we visited the Pohled quarry mined by Českomoravský štěrk (guides Kamila Botková, Pavel Klimeš and Martina Halatová – ČMŠ). The quarry is situated in gneisses and amphibolites hosting several genetic sulphide mineralization types (impregnated, massive, quartz vein-associated). Our findings were mainly massive pyrrhotite and sphalerite. The process of mining and processing of crushed macadam was also part of the excursion. The last stop was the surroundings of Stříbrné Hory, where members of Speleo Jihlava showed us the remainings of medieval sulphide mining.
We are grateful for the possibility to visit the sites to Česká Geologická Služba, Českomoravský beton, Aurum Global Exploration a Speleo Jihlava
