New minerals of the group of iron antimonides and arsenides from Seinäjoki deposits, Finland

This article gives pertinent data of two minerals, previously unknown in nature, seinäjokite ‒ (Fe0.8Ni0.2)(Sb1.7As0.3)2 and the antimony westerveldite ‒ Fe(As0.95Sb0.05); also described is the mineral association in which they occur

Associations of ore minerals in the deposits of the Seinäjoki district and the discussion on the ore formation

The mineral associations of the antimony deposits in the Seinäjoki region (Finland) are described on the basis of microprobe investigations. There are two ore associations: quartz-antimony and pyrrhotite- antimony. The latter is characterized by the presence of the new minerals seinäjokite and pääkkönenite first discovered in these deposits. The data obtained suggest that minerals were formed in the deposits under specific conditions: at relatively high temperatures for antimony deposition, and at extremely low sulphur fugacity for the hydrothermal process

Mercury in Mid-Ocean ridges (on the example of Mid-Atlantic ridge and East Pacific rise)

Data on mercury distribution within the rocks and ores of the Mid-Atlantic Ridge and East Pacific Rise are presented. The results are discussed from the standpoint of mercury degassing of the Earth. Materials on its modern manifestation in the Ocean are given. A comparison of mercury has been made for the present day rift and paleorift by the example of Mid-Atlantic Ridge and Ural province