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Multiple fluid sources of Au-mineralisation: the Jílové district, Bohemian Massif, Czech Republic
Published in Adam Piestrzyński, Mineral Deposits at the Beginning of the 21st Century, 2001
J. Zachariáš, M. Pudilová, K. Žák, V. Janoušek
Gold of variable fineness (830-990/1000, mostly >900/1000) is accompanied by Bi-Te-S minerals in changing proportions. Au-Bi-Te-S mineral paragenesis is predominantly related to microcracks in quartz, carbonates or sulphides in the vein type of mineralisation or to subisometric inclusions in sulphides in stockwork mineralisation type. Morávek (1971) and Litochleb & Srein (1995) presented typical sequence of the gold-bearing stage: native Bi ± bismuthinite (oldest) ➪ tetradymite ➪ tellurobismuthite ➪ altaite, petzite, hessite and/or galena ➪ calaverite ➪ native gold (youngest).
Properties of the Elements and Inorganic Compounds
Published in W. M. Haynes, David R. Lide, Thomas J. Bruno, CRC Handbook of Chemistry and Physics, 2016
W. M. Haynes, David R. Lide, Thomas J. Bruno
Sulfur (orthorhombic) Sylvite Syngenite Synthetic anorthite (hexagonal) Synthetic anorthite (orthorhombic) Talc Tantalum Teallite Tellurite Tellurium Tellurobismuthite Tennantite Tenorite Tetrahedrite Thorianite Thorite Tiemannite Tin (white) Titanium Titanium(III) oxide Topaz Tremolite Trevorite Tridymite Trogtalite Troilite Tschermakite Tungsten Tungstenite Turquois Umangite Uraninite Ureyite Uvarovite Uvite Vaesite Valentinite Vanthoffite Vaterite Villiaumite Violarite Wolframite Wollastonite Wulfenite Wurtzite Wustite Xenotime Zinc Zincite Zinc telluride Zircon Zoisite
The soil-plant transfer of risk elements within the area of an abandoned gold mine in Libčice, Czech Republic
Published in Journal of Environmental Science and Health, Part A, 2018
Martina Umlaufová, Jiřina Száková, Jana Najmanová, Jiřina Sysalová, Pavel Tlustoš
The abandoned gold mine in Libčice is situated in the Central Bohemian region (Czech Republic), ca. 2.5 km south-west from the village of Libčice (GPS coordinates of the location are displayed in Supplementary Table S1). The indirect historical information about mining activities in this area originate from the thirteenth to fifteenth century, but the most intensive mining took place from the seventeenth to nineteenth century, although mining activity declined during the nineteenth century. However, after 1911, the mining was renewed and the amalgamation plant and smelter were built. During the period from 1913 to 1923, 8,661 tonnes of ore were extracted from the mine-producing about 25 kg of gold-and after 1923 the mining activities were minimized. The next phase of mining was the period during World War II (1941–1945), when more than 51 kg of gold was produced. At present, only the ruins of the buildings, which are gradually disintegrating, are visible in the area, and findings of macroscopic gold are very rare.[18] Among the ore minerals (in addition to macroscopic gold) pyrite, pyrrhotine, chalcopyrite, molybdenite, and minerals from the Bi-Te group, such as tellurobismuthite, joséite-B, pilsenite, etc., were found. Detailed results of the mineralogical composition have been published by Langrová et al.[19] The As-bearing minerals comprise arsenopyrite and löllingite.[20] The majority of the area is covered by mixed (mostly deciduous) forest, and dense cover of herbaceous plants. The surface-air transport of Hg can be substantially affected by the density of the vegetation cover.[21] Thus, the presence of enhanced risk element contents (especially As and Hg) in soils within the area of the mine may be expected. However, neither soil element contents and mobility, nor the plant-availability of the elements was investigated in this area. Because of the close proximity of the village Libčice, where the meadow between the mine area and the village is used for livestock grazing, an assessment of the potential risk posed by the enhanced element contents in the soil-plant system is required. The objectives of this study were (i) to assess the potential hazard of the element contents and mobility in soils, and their uptake by the herbaceous vegetation cover, and (ii) to estimate the potential necessity of a remediation measures for minimizing the environmental risks due to the abandoned mine.