摘要
基于滇中大姚、姚安、南华、双柏四县土地质量地球化学调查数据,研究姚安县土壤地球化学特征及富锌成因.结果表明:姚安县表层土壤富锌(含量大于等于84×10^(-6))面积713.68 km^(2),占比41.94%.受地质背景、成土母质、酸碱度等因素的影响,锌高值区主要分布于太平镇-栋川镇-光禄镇沿线平坝区内,呈近南北向面状展布.以姚安平坝区为例,研究土壤富锌成因,认为锌主要来源于区内富碱斑岩区的含锌岩石矿物风化,受河流搬运作用,由于黏土的吸附作用,于第四系中坝区形成次生富集.
Based on the geochemical survey data of land quality of four counties(Dayao,Yao’an,Nanhua and Shuangbai)in central Yunnan Province,this paper studies the soil geochemical characteristics and Zn enrichment genesis in Yao’an County.The results show that the Zn-rich surface soil(with Zn content greater than or equal to 84×10^(-6))covers an area of 713.68 km^(2),accounting for 41.94%of the total area.Influenced by factors such as geological background,soil parent materials,and pH levels,the high-Zn zones are primarily distributed in the flatland areas along Taiping Town-Dongchuan Town-Guanglu Town,exhibiting a nearly north-south belt.Taking the Yao’an flatland as an example,the study on Zn enrichment genesis reveals that Zn primarily originates from the weathering of minerals in Zn-bearing rocks in alkali-rich porphyry areas.Through river transportation and subsequent clay adsorption processes,secondary Zn enrichment is completed in the Quaternary central flatland areas.
作者
黄加忠
白平雁
吴志超
张龙
王虎
王长如
阮剑
HUANG Jia-zhong;BAI Ping-yan;WU Zhi-chao;ZHANG Long;WANG Hu;WANG Chang-ru;RUAN Jian(Kunming Natural Resources Comprehensive Survey Center,CGS,Kunming 650000,China;Technology Innovation Center for Natural Ecosystem Carbon Sink,Ministry of Natural Resources,Kunming 650000,China)
出处
《地质与资源》
2025年第3期352-360,共9页
Geology and Resources
基金
中国地质调查局“滇中大姚、姚安、南华、双柏四县土地质量地球化学调查”(ZD20220211)
“西部地区战略性矿产靶区查证技术支撑”(DD20243018).
关键词
富锌土壤
地球化学
成因分析
云南省
Zn-rich soil
geochemistry
genesis
Yao’an County
Yunnan Province
