广东鼎湖山斑岩钼矿区生物地球化学特征

本文对从钼矿区和对照区采集的岩石、土壤和植物样品的研究表明,矿区岩石与土壤中钼含量的相关系数为0.74,土壤与马尾松、桃金娘、鼠刺和芒箕叶片中钼含量的相关系数分别为0.9,0.87,0.98和0.99。在马尾松、桃金娘、鼠刺、芒箕和藤黄檀的叶片中,矿区相对于对照区,前者的最高钼含量是后者的18倍、53倍、12倍、46倍和35倍。钼含量高的土壤中生长的藤黄檀的细胞,在电子显微镜下其结构发生明显变化,主要表现为核膜界限消失,核仁解体,叶绿体结构受到破坏,细胞中有颗粒物存在。钼还会抑制植物叶片对镁的吸收。因此利用生物地球化学特征可以找出隐伏在植被下的矿床。

BIOGEOCHEMICAL CHARACTERISTICS OF MO DEPOSIT IN DINGHUSHAN, GUANGDONG

Research on rock,soil and botanic samples from the Dinghushan Mo field and the background area shows that the coefficient correlation of Mo between rock and soil is 0.74;and the coefficient correlation of Mo between Pinus massoniana,Rhodomyetus tomentosa,D.linearis.Var.dichotoma,Dalbergia hancei and soil are 0.90,0.87,0.98,and 0.99,respectively.The Mo contents of Pinus massoniana,Rhodomyetus tomentosa,D.linearis.Var.dichotoma and Dalbergia hancei leaves in the Mo field are 18,53,12,46 and 35 times as much as those in the background area,respectively.By the electron microscope observation,the aberrance effect of cell structure of Dalbergia hancei growing in Mo-rich soil is obvious.The kernel membrane demarcation line disappears,the kernel disintegrates,the chloroplast structure is destroyed yet and there is particulate matter in the cell.Additionally,Mo in leaves can suppress the absorption of magnesium.