Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1144/1467-7873/07-131 |
Vertical variations and dispersion of elements in arid desert regolith: a case study from the Jinwozi gold deposit, northwestern China | |
Wang, Xueqiu; Wen, Xueqin; Rong, Ye; Liu, Zhanyuan; Sun, Binbin; Zhao, Shanding; Shi, Shujuan; Wei, Hualing | |
通讯作者 | Wang, Xueqiu |
会议名称 | 22nd International Geochemical Exploration Symposium |
会议日期 | SEP, 2005 |
会议地点 | Perth, AUSTRALIA |
英文摘要 | Desert terrains in northern China are covered by widespread regolith sediments which mask geochemical signals from ore bodies and are major obstacles to mineral exploration. There is a critical need to study the vertical distribution of elements in the regolith, and to determine potential mechanisms for transferring elements from the ore body upwards through regolith cover to the surface, and to establish appropriate sampling media and analytical methods. The Jinwozi gold deposit, which is covered by four to several tens of metres of regolith sediment, was selected for this study. Samples were taken from different regolith horizons in two vertical profiles over the deposit. Gold and associated elements showed crescent-shaped distribution patterns in the vertical profile, i.e. elements tend to be enriched in lower and upper parts of the profile over the ore body. Enrichment of elements in weathered rocks is derived from the ore body, whereas enrichment at or near surface is due to adsorption by clays or oxide coatings. For gold, the greatest contrast between anomalous and background concentration is in the fine fraction of soils, and the An anomalies are located directly over the ore body. Gold appears to migrate vertically to the surface to be trapped in clays and oxide coatings to produce superimposed anomalies in the regolith near or at the surface. Fine fraction samples (-120 mesh; 125 tm) from clay-rich horizons or selective leaching of elements adsorbed on clays or oxide coatings are effective for locating buried deposits. |
英文关键词 | geochemical variations migration mechanism desert regolith partial leach Jinwozi gold deposit |
来源出版物 | GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS |
ISSN | 1467-7873 |
EISSN | 2041-4943 |
出版年 | 2007 |
卷号 | 7 |
页码 | 163-171 |
出版者 | GEOLOGICAL SOC PUBL HOUSE |
类型 | Article;Proceedings Paper |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E ; CPCI-S |
WOS记录号 | WOS:000246212300007 |
WOS关键词 | MOBILE FORMS ; OVERBURDEN ; METALS |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/296513 |
作者单位 | (1)Inst Geophys & Geochem Explorat, Langfang 065000, Hebei, Peoples R China;(2)CAGS, Key Lab Appl Geochem, Langfang 065000, Hebei, Peoples R China;(3)Changan Univ, Xian 710054, Shaanxi, Peoples R China;(4)China Univ Geosci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Xueqiu,Wen, Xueqin,Rong, Ye,et al. Vertical variations and dispersion of elements in arid desert regolith: a case study from the Jinwozi gold deposit, northwestern China[C]:GEOLOGICAL SOC PUBL HOUSE,2007:163-171. |
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