| Mode of Occurrence of Gold in Micro-Disseminated Strata-Bound Sb-Au Deposits,Qinling Region,China |
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| 摘 要： | Optical studies,backscattered electron images,secondary ion spectrometry and highprecision transmission electron imaging demonstrate that gold is strongly correlated with arsenic on a microscopic scale in the sediment-hosted micro-disseminated gold deposits.The positive correlation between Au and As,despite varying Au/As ratio,is persistent in arsenian pyrite overgrowths and arsenopyrite,It is found that gold occurs in native state as submicro beads in association with arsenic-bearing sulfides,The extremely small grain size of gold may indicate a very rapid process of deposition.
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| 关 键 词： | 金矿床 秦岭地区 地层 微粒金 锑矿床 |
Mode of occurrence of gold in micro-disseminated strata-bound Sb-Au deposits, Qinling region, China |
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| Authors: | Fuxin Zhang |
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| Institution: | (1) Department of Geology, Northwest University, Xi’an, 710069 |
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| Abstract: | Optical studies, backscattered electron images, secondary ion spectrometry and high-precision transmission electron imaging
demonstrate that gold is strongly correlated with arsenic on a microscopic scale in the sediment-hosted micro-disseminated
gold deposits. The positive correlation between Au and As, despite varying Au/As ratio, is persistent in arsenian pyrite overgrowths
and arsenopyrite. It is found that gold occurs in native state as submicro beads in association with arsenic-bearing sulfides.
The extremely small grain size of gold may indicate a very rapid process of deposition. |
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| Keywords: | micro-disseminated antimony-gold deposit arsenic-bearing sulfide overgrowth zoning structure submicro gold |
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