Geochemical Profile through an Ore-Bearing

摘要: A tin-tungsten-bearing granite cupola in the Krunhory Mrs. area (Czechoslovakia) was studied petrologically and geochemically. Investigation of core Cinovec drilling (1,596 m deep) determined downward vertical changes K, Na, Li, Rb Cs. Variation alkali content can be related to later alkalinization, which strongly influenced upper part cupola. The extent lithium albite is a depth 730 m. sodium curve reflects argillic alteration. No regular ore element found. Increased amounts tin tungsten are associated with greisens, quartz veins or altered parts lower granites. Also zinc shows relation epigenetic processes. Metalliferous solutions were introduced after complete consolidation massif. Alkalization greisenization took place especially apical portions Krun hory Mts. pluton. authors favor hypothesis supporting introduction ore-bearing constituents following wave alkalinization from deeper Earth's crust not exposed by mine workings.