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Geochemical Atlas – Erzgebirge and Vogtland
Cadmium in stream sediments
Seiten
2019
Beak Consultants (Verlag)
978-3-948423-08-7 (ISBN)
Beak Consultants (Verlag)
978-3-948423-08-7 (ISBN)
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The distribution of Cadmium (Cd) in stream sediments is log normal with a slight tendency to left skewness.
The median is 0.9 mg/kg and the arithmetic average is 1.7 mg/kg. The minimum concentrations are close to the detection limit of 0.005 mg/kg, the maximum values are to 84 mg/kg. Areas with gneiss hosted polymetallic vein deposits show significantly higher average Cd contents than granite massifs and Ordovician to Devonian metasedimentary rocks.
Areas of Cd > 5 mg/kg are related to the Freiberg mining district and to an ESE adjacent area of approximately 10 km E-W extension that partially hosts Pb-Zn-Ag bearing veins. Other areas of similar concentration occur in the vicinity of stratiform Fe-Zn-Sn mineralisation of the Westerzgebirge Complex deposit, extending beyond the study area´s south-eastern tip at the Czech border.
Areas with Cd > 3 mg/kg occur in Ordovician to Devonian metapelites and metabasites SW of Oelsnitz, e.g. in the vein districts of the central Erzgebirge (Annaberg-Buchholz, Ehrenfriedersdorf, and Marienberg-Wolkenstein), in the surrounding of the Sn-greisen deposits of Altenberg and Zinnwald-Cinovec, and near to the carbonate hosted stratiform Pb-Zn deposit of Rehefeld-Hermsdorf. Also, the polymetallic mineralisation of Mohorn-Grund with its remnants of mining activity coincides with elevated Cd levels. Furthermore, Ordovician metapelites of the northern Erzgebirge rim generally contain around or less than 1 mg/kg Cd. The lowest contents (Cd < 0.1 mg/kg) are related to the western part of the Eibenstock granite, whereas the neighbouring Kirchberg and Bergen granites do not contrast with their metasedimentary envelope.
The median is 0.9 mg/kg and the arithmetic average is 1.7 mg/kg. The minimum concentrations are close to the detection limit of 0.005 mg/kg, the maximum values are to 84 mg/kg. Areas with gneiss hosted polymetallic vein deposits show significantly higher average Cd contents than granite massifs and Ordovician to Devonian metasedimentary rocks.
Areas of Cd > 5 mg/kg are related to the Freiberg mining district and to an ESE adjacent area of approximately 10 km E-W extension that partially hosts Pb-Zn-Ag bearing veins. Other areas of similar concentration occur in the vicinity of stratiform Fe-Zn-Sn mineralisation of the Westerzgebirge Complex deposit, extending beyond the study area´s south-eastern tip at the Czech border.
Areas with Cd > 3 mg/kg occur in Ordovician to Devonian metapelites and metabasites SW of Oelsnitz, e.g. in the vein districts of the central Erzgebirge (Annaberg-Buchholz, Ehrenfriedersdorf, and Marienberg-Wolkenstein), in the surrounding of the Sn-greisen deposits of Altenberg and Zinnwald-Cinovec, and near to the carbonate hosted stratiform Pb-Zn deposit of Rehefeld-Hermsdorf. Also, the polymetallic mineralisation of Mohorn-Grund with its remnants of mining activity coincides with elevated Cd levels. Furthermore, Ordovician metapelites of the northern Erzgebirge rim generally contain around or less than 1 mg/kg Cd. The lowest contents (Cd < 0.1 mg/kg) are related to the western part of the Eibenstock granite, whereas the neighbouring Kirchberg and Bergen granites do not contrast with their metasedimentary envelope.
Reihe/Serie | Geochemical Atlas - Erzgebirge and Vogtland ; 7 |
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Verlagsort | Freiberg |
Sprache | englisch |
Maße | 420 x 297 mm |
Themenwelt | Naturwissenschaften ► Geowissenschaften |
Schlagworte | Bachsedimente • Cadmium • Erzgebirge • Geochemie • Geochemistry • Stream Sediments • WISTAMERZ |
ISBN-10 | 3-948423-08-3 / 3948423083 |
ISBN-13 | 978-3-948423-08-7 / 9783948423087 |
Zustand | Neuware |
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