福建省胃癌高发区环境地质、地球化学特征分析

Analysis of environmental geology and geochemistry features of high stomach cancer rate areas,Fujian Province

采用多元统计方法，从福建省１４个市、县的５２个乡、镇、市区调查结果表明，胃癌死亡率以４０／１０万为界，分为胃癌高发区和中低发区，两者间地理分布差异明显。胃癌高发区位于中部沿海平原，地质背景以第四纪海积层为主，四周为中生代酸性－中酸性火山岩及花岗岩类侵入体。区内断裂构造发育。环境地球化学以缺乏铁、钴、镍、钒与异常富集的汞、金、钡为特征，其中，铁、钴的协同抑制胃癌高发区有明显的作用，金、汞协同诱发胃癌的作用值得进一步研究。

According to results of survey on 52 villages，towns and districts of 14 cities and counties in Fujian Province,there is significant geological difference of stomach cancer rate, with the rate 40/100,000 as the boundary between the high stomach cancer rate area and the low rate area. The former is largely located in the coastal plain area in the middle eastern part of Fujian Province,where the geological background is quaternary marine deposits surrounded by invader of mesozoic acidic and intermediate-acidic volcanic rock and granite with deep and large faults well-developed. Its environmental geochemistry feature is deficiency in Fe, Co,Ni,V,and extraordinary accumulation of Hg, Au and Ba. The results of survey show that there is syncrgistic action of Fe and Co on inhibiting occurance of stomach cancer and of Au and Hg on promoting occurance of stomach cancer. The mechanisms are needed for further study.