宋慈安;雷良奇;杨仲平;文宗振;

• 1:桂林理工大学广西有色金属隐伏矿床成矿与预测重点实验室
• 2:桂林理工大学地球科学学院
• 3:桂林矿产地质研究院
• 4:广西大学生命科学与技术学院

摘要(Abstract)：

采用光谱仪及透射电子显微镜对广西几个金属矿床的生物地球化学异常和植物细胞微观特征进行了研究,结果发现:生物地球化学异常对土壤地球化学异常有明显的物质性继承关系;生物地球化学异常的物质以金属聚集体(电子致高密度体物质)的形式沉淀在植物液胞中或细胞壁及膜边缘,其对植物的伤害可能只达到细胞或组织的水平。生物地球化学异常的形成是金属元素胁迫植物吸收过程产生屏障效应的结果;屏障效应是植物避性屏障和耐性屏障的综合反映。避性较大的植物,其在矿区的吸收率相对于背景区降低幅度较大;耐性较大的植物,其异常衬度系数较大。生物地球化学找矿的有效指示植物应选择避性较小而耐性较大的植物。

关键词(KeyWords)： 屏障效应;避性;耐性;生物地球化学异常;找矿有效指示植物;金属矿床

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(40873030;40972220)

作者(Author): 宋慈安;雷良奇;杨仲平;文宗振;

Email:

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