caa a22 4500 445301279 CHVBK 20180317142558.0 cr unu---uuuuu 170323e20101101xx s 000 0 eng 10.1007/s11430-010-4115-8 doi (NATIONALLICENCE)springer-10.1007/s11430-010-4115-8 Particles carried by ascending gas flow at the Tongchanghe copper mine, Guizhou Province, China [Elektronische Daten] [JianJin Cao, Chang Liu, ZhiHua Xiong, TingRong Qin] We collected and analyzed, using transmission electron microscopy, the particles carried by ascending gas flow in soil above the concealed orebody of the Tongchanghe copper mine, Guizhou Province. Particles of native copper, native copper-iron alloy, and native chromium-iron-copper alloy particles in the ascending gas flow were first discovered. Commonly, they were aggregations of relatively small particles. Individual particles within aggregations were subcircular, elliptical, regularly polygonal, or elongate and from 5 to 40 nm in size. The aggregations were subcircular or elliptical and 20-150 nm in size. Chloride, oxide, sulfate, and hydroxide particles containing ore-forming metals in the ascending gas flow were also discovered. The elements of the particles were commonly in a high valence state, suggesting that they were formed in a near-surface oxidizing environment. Discovery of the particles extracted from the ascending gas flow above the Tongchanghe copper mine provided a powerful tool for exploration for deep concealed orebodies. Our study also showed that native copper, native copper-iron alloys, native chromium-iron-copper alloys, as well as chloride, oxide, sulfate, and hydroxide compounds containing ore-forming metals can be transported in particle form by ascending gas flow below the Earth's surface. Science China Press and Springer-Verlag Berlin Heidelberg, 2010 Tongchanghe copper mine nationallicence ascending gas flow nationallicence particles nationallicence prospecting nationallicence migration nationallicence Cao JianJin Department of Earth Science, Sun Yat-sen University, 510275, Guangzhou, China aut Liu Chang Department of Earth Science, Sun Yat-sen University, 510275, Guangzhou, China aut Xiong ZhiHua Department of Earth Science, Sun Yat-sen University, 510275, Guangzhou, China aut Qin TingRong Second General Team, Guizhou Nonferrous Metal Geological Exploration Bureau, 553004, Liupanshui, China aut Science China Earth Sciences SP Science China Press 53/11(2010-11-01), 1647-1654 1674-7313 53:11<1647 2010 53 11430 https://doi.org/10.1007/s11430-010-4115-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-4115-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cao JianJin Department of Earth Science, Sun Yat-sen University, 510275, Guangzhou, China aut NATIONALLICENCE 700 1- Liu Chang Department of Earth Science, Sun Yat-sen University, 510275, Guangzhou, China aut NATIONALLICENCE 700 1- Xiong ZhiHua Department of Earth Science, Sun Yat-sen University, 510275, Guangzhou, China aut NATIONALLICENCE 700 1- Qin TingRong Second General Team, Guizhou Nonferrous Metal Geological Exploration Bureau, 553004, Liupanshui, China aut NATIONALLICENCE 773 0- Science China Earth Sciences SP Science China Press 53/11(2010-11-01), 1647-1654 1674-7313 53:11<1647 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer