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。
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 Pz05 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, elements shows Ba, Sr etc. and Pb content reaches to 1 446× 10-6. The distribution characteristic of trace that the formation of phosphorite is closely related to bacteria and algae.
出处
《地质找矿论丛》
CAS
CSCD
2013年第1期101-105,共5页
Contributions to Geology and Mineral Resources Research
关键词
陡山沱组
磷块岩
地球化学
瓮安磷矿
贵州省
Doushantuo Formation
phosphorite
geochemistry
Wong＇an phosphorite deposit
Guizhouprovince
