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4篇 您的检索式:作者名="Torsten Graupner"
    题名 作者 年代 出处 被引量
1The Muruntau gold deposit(Uzbekistan)--A unique ancient hydrothermal system in the southern Tien Shan显示文摘The Muruntau gold deposit in the Central Kyzylkum,Uzbekistan is one of the largest single gold deposits worldwide.Data available from the literature are reviewed with the aim to(1) integrate the present knowledge on this unique deposit from Russian and English literature;(2) show the considerable progress made in the understanding of the genesis of the Muruntau deposit during the last decades;and(3) point to problems still open for future research.Deposit formation occurred through a multi-stage process involving sedimentation,regional metamorphism including thrusting,magmatism with formation of hornfels aureoles and several stages of hydrothermal activity.According to recent knowledge,synsedimentary or pure metamorphic formation of gold mineralization seems unlikely.The role of granite magmatism occurring roughly within the same time interval as the main hydrothermal gold precipitation remains uncertain.There are no signs of interaction of matter between the magma(s) and the hydrothermal system(s).On the other hand,there was an intense,high-temperature(above 400 ℃)fluid- wall rock interaction resulting in the formation of gold-bearing,cone-like stockworks with veins,veinlets and gold-bearing metasomatites.Several chemical and isotope indicators hint at an involvement of lower-crustal or mantle-related sources as well as of surface waters in ore formation.Deposit formation through brecciation involving explosion,hydrothermal or tectonic breccias might explain these data.Further investigations on breccia formation as well as on the exact timing of relevant sedimentary,metamorphic,magmatic and hydrothermal events are recommended.Ulf Kempe Torsten Graupner Reimar Seltmann Hugo de Boorder Alla Dolgopolova Maarten Zeylmans van Emmichoven 2016Geoscience Frontiers2016,7,3:7
2The impact of cemented layers and hardpans on oxygen diffusivity in mining waste heaps A field study of the Halsbrücke lead–zinc mine tailings (Germany)显示文摘Claus Kohfahl Torsten Graupner Christian Fetzer Asaf Pekdeger 2010Science of the Total Environment2010,,23:2
3Multiple sources for mineralizing fluids in the Charmitan gold(-tungsten) mineralization (Uzbekistan)显示文摘Torsten Graupner Samuel Niedermann Dieter Rhede Ulf Kempe Reimar Seltmann C. Terry Williams Reiner Klemd 2010Mineralium Deposita2010,,7:1
4Multiple sources for mineralizing fluids in the Charmitan gold(-tungsten) mineralization (Uzbekistan)显示文摘Torsten Graupner Samuel Niedermann Dieter Rhede Ulf Kempe Reimar Seltmann C. Terry Williams Reiner Klemd 2010Mineralium Deposita2010,,7:1
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