摘要
本文以广东省河台金矿区为研究对象 ,探讨了金元素的生物地球化学特征。研究结果表明 ,在金矿区上生长的马尾松和芒箕等植物对金、铜等重金属元素有较强的吸收和聚积作用 ,植物明显受到金及伴生元素的毒化效应 ,金、铜等金属元素的过量吸收 ,使植叶内的叶绿素、类葫萝卜素含量、水含量和叶面温度相应降低 ;金矿区与背景区相比 ,马尾松叶片的反射光谱特征明显变化 ,叶绿素的反射峰和近红外肩的反射率值呈上升趋势 ,红界发生了 5～ 1 0nm的“蓝移” ;这些金矿区的生物地球化学特征为遥感在植被地区找矿提供了理论依据 ,利用遥感 (TM)资料可以提取由生物地球化学效应引起的植被光谱异常信息。从而指导探查植被覆盖下的隐伏金属矿藏。
This paper takes the Hetai gold deposit in Guangdong as the research target, and discusses its biogeochemical characteristics. The results have proved that Au, Cu were intensely absorbed and accumulated by Pinus massoniana and D. Linearis Var. Dichotoma in the gold mining area. The plants in the area have been evidently poisoned by gold and associated elements. Excessive absorption of Au, Cu and other metals makes that the contents of chlorophyll, carotenoid and water, and leaf surface temperature of vegetation in the gold mining area are lower than the background values. By contrasting the gold mining area with the background, the spectral characteristics of leaves of Pinus massoniana are obviously different, chlorophyll absorption peak and infrared shoulder reflectance all tend to go up, and the blue shift of red edge of Pinus massoniana reaches 5～15nm. These can provide the theoretical basis for exploration using remote sensing technology in the vegetation area. The abnormal information on spectra was extracted by remote sensing (TM) data. The biogeochemical characteristics and remote sensing spectral characteristics can be used as guide lines for concealed metallic ore deposits in the vegetation area.
出处
《矿物学报》
CAS
CSCD
北大核心
2000年第1期80-86,共7页
Acta Mineralogica Sinica
基金
中国科学院"八五"重点项目!(批准号 :KY85 12 0 8 3 )中的部分研究结果
关键词
金矿
生物地球化学
遥感
找矿
光谱特征
gold deposit
biogeochemistry
remote sensing
exploration
spectral characteristics
