摘要
在矿化带上,植物群落中灯心草蚤缀(Arenaria juncea)密集生长,表明与铅、锌矿化有密切关系。34种植物(或植物部分)7种元素含量特征:含量水平铁>锰>锌>铅>铜>镍>钴;同种植物在不同地点的铅、锌含量变化范围大于种间的铅、锌含量变化范围;不同植物种类或同种植物在不同地点的钻、镍含量差异最小。例如,灯心草蚤缀的铅、锌含量最高,分别为1145ppm和3087ppm;不同地点的黄榆(Ulmus macrocarpa)枝、叶,灯心草蚤缀、萎陵菜(Potentillachinensis)的铅含量相差10倍多。植物和土壤之间元素含量的相关分析结果表明:黄榆枝、叶,山杏(Prungs sibirica)枝,盐蒿(Artemisia halodendron)地上部分的铅、锌含量与土壤中的铅、锌等相关系数显著或极显著相关水平(|r|≤α0.05,或≤α0.01)。黄榆枝等的铅、锌地球化学异常与矿体有密切关系。此外,本文还进行了矿化带上与非矿化带上植物中元素之间的主成分分析。
The types of plant communities in Mengentaoligai mine area are disscussed. Arenaria juncea, densely grown in the phytocommunities of the mineralized zone, is found closely related to the presence of Pb and Zn mineral deposits. Analytical results of seven element contents (in ash) for 34 species (or part of plant) show that: levels of element contents in sequence in the plants are Fe>Mn>Zn>Pb>Cu>Ni>Co; variable ranges of element contents in the plants are Pb, Zn>Fe,Mn>Cu>Co>Ni; and variable ranges of Pb, Zn contents in the same species at different sites are respectively larger than that among species, For example,Pb and Zn contents of Arenaria juncea, 1145ppm and 3087ppm respectively, are the highest;the difference among Pb contents of Ulmus macrocarpa, Arenaria juncea and Potentilla chinensis at different sites are more than 10 folds. The difference of Co and Ni contents in the species is less than two to one Striking correlation is found between elements in plants and in soils, such as the Pb and Zn contents between leaves and twigs of Ulmus macrocarpa, twigs of Prunus sibirica, Artemisia halodendron and soils (|r|≤α 0.05 or≤α 0.01). It is found that Pb and Zn phytogeochemical anomalies.correlate closely with Pb and Zn mining deposits. In addition, analysis of principal component was conducted among seven elements contents of 14 species (or part of plant) in the mineralized zone and 12 species in the unmineralized zone.
关键词
银
铅
锌
植物群落
元素含量
Ag, Pb and Zn mine area
Phytocommunity
Element content
Phytogeochemistry
