Particles carried by ascending gas flow at the Tongchanghe copper mine, Guizhou Province, China
Particles carried by ascending gas flow at the Tongchanghe copper mine, Guizhou Province, China
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DOI：
10.1007/s11430-010-4115-8
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
Jianjin Cao;Chang Liu;Zhihua Xiong;Tingrong Qin
中科院分区：
文献类型：
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作者：
Jianjin Cao;Chang Liu;Zhihua Xiong;Tingrong Qin
利用透射电镜对贵州铜厂河铜矿隐伏矿体上方土壤中上升气流携带的颗粒物进行了采集和分析。在上升气流中首次发现了自然铜、自然铜铁合金和自然铬铁铜合金颗粒。通常，它们是相对较小颗粒的聚集体。聚集体内的单个颗粒呈亚圆形、椭圆形、规则多边形或细长形，大小为5至40 nm。聚集体呈近圆形或椭圆形，大小为20-150 nm。在上升气流中还发现了含有成矿金属的氯化物、氧化物、硫酸盐和氢氧化物颗粒。颗粒的元素通常处于高价态，表明它们是在近表面氧化环境中形成的。铜厂河铜矿上方上升气流提取物的发现，为深部隐伏矿体的勘查提供了有力的工具。我们的研究还表明，自然铜，自然铜铁合金，自然铬铁铜合金，以及氯化物，氧化物，硫酸盐和氢氧化物的化合物，含有成矿金属，可以在地球表面以下的上升气流的颗粒形式进行运输。
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.