| 密文天,李德亮,冯志强,武新春,牛显.贵州瓮安陡山沱组磷块岩的地球化学特征[J].地质找矿论丛,2013,28(1):101-105 |
| 贵州瓮安陡山沱组磷块岩的地球化学特征 |
| Research on the geochemical characteristics of phosphorites of Doushantuo Formation in Wong'an county, Guizhou |
| 投稿时间：2012-03-02 |
| DOI：10.6053/j.issn.1001-1412.2013.01.014 |
| 中文关键词: 陡山沱组 磷块岩 地球化学 瓮安磷矿 贵州省 |
| 英文关键词:Doushantuo Formation phosphorite geochemistry Wong'an phosphorite deposit Guizhou province |
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| 中文摘要: |
| 贵州瓮安地区是震旦纪陡山沱期的一个磷块岩沉积区,生物作用是磷矿形成的重要因素。通过对贵州瓮安含磷岩系剖面地球化学特征的研究,认为磷块岩富集层是以P2O5与CaO构成的磷酸盐矿物为主,可分为白云质砂屑磷块岩和碳质磷块岩2个亚类;生物作用导致了磷块岩中Pb,As,Ba及Sr等微量元素的富集,其中亲硫元素Pb的含量最高达到1 446×10-6,反映了贵州瓮安震旦系陡山沱组磷块岩的成因与菌藻类生物作用密切相关。 |
| 英文摘要: |
| Doushantuo stage of Sinian period in Wong'an region is an important horizon of phosphorite in China. Biological congregation is an important factor for forming phosphorite deposits. Profile geochemical research of phosphorite sequence shows that the enriched layer of phophorite is dominated by phosphate minerals of P2O5 and CaO. The phosphorite is divided into two sub-types, i.e. dolomitic debris phosphorite and carbonaceous phophorite. The biological factors affected the trace element's enrichment, such as Pb, As,Ba, Sr etc.and Pb content reaches to 1 446×10-6. The distribution characteristic of trace elements shows that the formation of phosphorite is closely related to bacteria and algae. |
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