Super-enrichment of dispersed elements and associated ore deposits
Dispersed elements do not always occur as associated elements in the ore deposits of other elements. Instead, they can constitute independent ore deposits. The focus of this paper is placed on the mechanism of super-enrichment of the four dispersed elements Tl, Ge, Se, and Te under favorable geological conditions, where their enrichment coefficients are so high that their abundances can reach n x 103-n × 104, sometimes even up to n X 106 times (e. g. Te) those of the crust. As a result, they can form their independent ore deposits. Studies have shown that such independent ore deposits are mostly distributed in the southwestern part of China, most of which belong to low-temperature ore deposits, ranging in age from Yanshanian to Himalayan (Cretaceous to Cenozoic), with a significant time gap with the host strata. Moreover, this paper also deals with the existing forms (as independent minerals, occurring isomorphously and being adsorbed) of the dispersed elements in those independent ore deposits. The discovery of independent ore deposits of dispersed elements is a great breakthrough in the study of dispersed element metallogenesis.
Key wordsdispersed element super-enrichment independent ore deposit existing form
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- Cao Zhimin and Luo Yaonan, 1993, Geological features and ore composition of the Te (Bi) deposit in Sichuan Province, in Abstract collections of the 5th China National Symposium on Mineral Deposits [Z]: Beijing, Geological Publishing House, p. 476–478 (in Chinese).Google Scholar
- Chen Daiyan, 1989, Discovery of rich-thallium ore body in paregenesis ore deposit of mercury and thallium and research on its mineralization mechanism [J]: Journal of Guizhou Institute of Technology, v. 18, n. 2, p. 1–20 (in Chinese with English abstract).Google Scholar
- Encyclopedia (the volume of geology) [Z]: 1993, p. 197 (in Chinese).Google Scholar
- Hu Ruizhong, Bi Xianwu, Su Wenchao et al., 1997, On the problems of Ge mineralization in coals as exemplified by the Lincang Ge deposit [J]: Acta Mineralogiea Sinica, v. 17, n. 4, p. 364–367 (in Chinese with English abstract).Google Scholar
- Liu Jiajun, Zheng Minghua, and Liu Jianming, 1997, Selenium enrichment in Cambrian strata-bound gold deposits in western Qinling Mountains; Characteristics, origin and prospects [J]: Acta Geologica Sinica, v. 71, n. 3, p. 266–273 (in Chinese with English abstract).Google Scholar
- Luo Yaonan and Cao Zhimin, 1996, Dashuigou independent tellurium deposit [M]: Chengdu, Southwest Jiaotong University Publishing House, 160p. (in Chinese)Google Scholar
- The Office of China National Mineral Resource Reserves Committee, 1987, Reference handbook of industrial demands on mineral resources [M]: Beijing, Geological Publishing House, p. 193–209 (in Chinese).Google Scholar
- Tu Guangchi, 1994, Dispersed elements can form independent ore deposits-A new field pertaining to mineral resources which is awaiting for exploration, in New advances in mineralogy, petrology and geochemistry in China [M]: Lanzhou University Publishing House, p.234 (in Chinese).Google Scholar
- Yao Linbo and Gao Zhenmin, 2001, Electron microprobe analyses of the existing forms of Se in the Yutangba independent Se deposit [J]: Acta Mineralogica Sinica, v. 21, n. 1, p. 49–52 (in Chinese with English abstract).Google Scholar
- Zhang Zhong, Zhang Xingmao, and Zhang Baogui, 1998, Elemental geochemistry and metallogenic model of Nanhua As-Tl deposit in Yunnan Province, China [J]: Geochimica, v. 27, n. 3, p. 269–275 (in Chinese with English abstract).Google Scholar
- Zhuang Hanping and Lu Jialan, 1998, Germanium occurrence in Lincang superlarge deposit in Yunnan, China [J]: Science in China (Series D), v. 41 (supp.), p. 21–27.Google Scholar