摘要
我国东北森林沼泽景观区主要分布在内蒙、黑龙江、吉林三省区的大、小兴安岭、长白山和张广才岭地区,面积70多万km2。研究发现:①水系沉积物中有机质干扰的临界值大约在有机碳含量1.5%左右。有机碳含量<1.5%时,对元素含量的影响很小;当有机碳含量>1.5%时,对许多元素都有比较明显的富集作用。②选择-10～+60目粒级段水系沉积物作为采样介质基本上可以消除有机质的影响,得到比较客观反映测区地质实际的地球化学资料。
The forest-swamp landscape in the Northeast of China is mainly distributed over the Greater Xing'an Mountain, the Lesser Xing'an Mountain, the Changbai Mountain and the Zhangguangcai Mountain in the Inner Mongolia Autonomous Region, the Jilin Province and the Heilongjiang Province, totaling over 700,000 km2. It has been found through research: ① the critical of interference of organic materials in stream sediments is about 1.5% of the content of organic-carbon,, little influence on the contents of elements could be seen when the content of organic-carbon is < 1.5 %; whereas the obvious enrichment for many elements would occur when the content of organic-carbon is > 1.5 %; ② the above influence could basically be eliminated when the sampling stream sediments of - 10 ～ + 60 mesh are selected, so as to obtain the geochemical data objectively reflecting the geological situation in the surveyed area.
出处
《地质与勘探》
CAS
CSCD
北大核心
2003年第6期94-98,共5页
Geology and Exploration
基金
地质调查项目<我国东北部森林沼泽景观区域化探工作方法技术研究>的部分研究成果。
关键词
森林沼泽景观
区域化探
中国东北
水系沉积物
the Northeast of China, forest-swamp landscape, regional geochemical exploration, methods
