摘要
粤西-海南地区受金毒化植物中的金含量为丰度值的10—1961倍。叶绿素比变质岩区的低10％—30％,比花岗岩区的高10％—20％,类葫萝卜素比对照区的低10％—44％,叶体水含量比对照区的低10％—20％,叶面温度比对照区的低2—3℃。叶体细胞变形并破裂,叶面出现色斑、黄化和返青;叶面光谱反射率比对照区高5％—30％,波形发生5—15nm的蓝移;叶冠TM卫片和成象光谱航片的灰度值比对照区的高10％—100％,在TM和成象光谱假彩图上,受金毒化植物呈黄色与背景植物相区别;很据金生物地化效应的光谱和图象特征,建立了金矿信息系统和专家预测系统,快速、经济、准确地在粤西-海南广大植被地区发现了两个金矿靶区和两个金矿远景区。
The vegetation has been poisoned by gold in the western Guangdong-Hainan area. The gold conten to fleaves is|10％—1961 times as high as the abundance; chlorophpll is 10％—30％ lower than that of the vegetation of metamorphic rocks and 10％—20％ higher than that of the vegetation of granite; carotenoid is 10％—44％ lower than the background value; the water content of leaves is 10％—20％ lower than the background value; the temperature on the leave surface is 2—3℃ lower than the background value. The cells of leaves are deformed and broken. The leave surface shows colour spots and becomes yellow or dark green. The spectral reflectance of the leave surface is 5％—30％ higher than the background value; the spectral wave shape has shifted 5—15nm to the short wavelength. The image gray scales of Landsat TM and airborne imaging scanner (AIS) are 10％—100％ higher than the background value. On Landsat TM and AIS galse colour images, plants poisoned by gold display a yellow colour, which distinguishes them from background plants. According to the spectrum and image features of gold biogeochemical effects, the author has constructed a gold information system and expert prediction system, and thus two gold target areas and two gold prospect areas have been found rapidly, economically and accurately in the western Guangdong-Hainan area that is covered with vast vegetation.
出处
《地质学报》
EI
CAS
CSCD
北大核心
1992年第2期170-181,T001,共13页
Acta Geologica Sinica
基金
广东省自然科学基金
国家"七五"科技攻关项目
关键词
金矿
勘探
遥感
生物
地球化学
gold ore biogeochemical stressed, physiological and ecological characteristics of vegetation, characteristics of spectral reflectance, characteristics of remote sensing image, information and experts system for gold ore exploration.
