Macro appearance and micro evidence of geochemical anomalies using geogas prospecting for concealed gold deposit

PreviousNext No Access15th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 31 July-3 August 2017Macro appearance and micro evidence of geochemical anomalies using geogas prospecting for concealed gold depositAuthors: Rong YeMei LuRong YeSchool of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, ChinaSearch for more papers by this author and Mei LuSchool of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, ChinaSearch for more papers by this authorhttps://doi.org/10.1190/sbgf2017-315 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Shenjiayao altered crushed belt gold deposit is located in the outside of the Xiaoqinling gold orefield--the second productive area following the Jiaodong gold orefield in China. Most of the ore district is coverd by Quaternary sediments. Observations and analyses using polarization microscope and scanning electronic microscope(TEM) and electronic probe micro analyse(EPMA) of ores indicate that the primary gold-bearing minerals in this deposit are natural gold and electrum. Chemical analyse of five typical ores shows that Au is 12,451ng/g on average and Ag is 330,424ng/g on average. We use geogas prospecting, one mothod of explorational geochemistry, on the known Shenjiaoyao gold deposit for studing its mechanism. In ores samples, Au,W and Sn are significant correlation, and Ag, Pb and Sb show significant correlation. In geogas simples, there are significant correlations between Au and W, Ag and Hg, respectively. Spatial distributions of element like Au, W, etc. show clear geochemical anomalies over the concealed gold orebodies. It can be indicated that these geochemaical anomalies are related with deep orebodies. What is more, Au-bearing nanoparticles and other metallic nanoparticles in the geogas have been observaed, practically supporting the theory that nanoparticle is a stable form of transporting and expressing the geochemical anonalies in geogas prospecting, even in deep-penetrating geochemistry. Keywords: geogas, geochemistryPermalink: https://doi.org/10.1190/sbgf2017-315FiguresReferencesRelatedDetails 15th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 31 July-3 August 2017ISSN (online):2159-6832Copyright: 2017 Pages: 1876 publication data© 2017 Published in electronic format with permission by the Brazilian Geophysical SocietyPublisher:Society of Exploration Geophysicists HistoryPublished Online: 03 Aug 2017 CITATION INFORMATION Rong Ye and Mei Lu, (2017), "Macro appearance and micro evidence of geochemical anomalies using geogas prospecting for concealed gold deposit," SEG Global Meeting Abstracts : 1620-1623. https://doi.org/10.1190/sbgf2017-315 Plain-Language Summary KeywordsgeogasgeochemistryPDF DownloadLoading ...