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河南省济源县饮用地表浅水居民的胃癌发病率显著高于饮用山泉水或深层地下水的居民。但地表浅水中与胃癌发病有关的物质来源问题尚未涉及。本文报道了在济源县饮用新生代第三系地质出露区浅水或饮用该地质水系邻近下游区浅水的居民胃癌发病率显著高于饮用远离这一地质水系及其他地质水系的居民胃癌发病率。提示浅水中与胃癌发病有关的物质主要来源于出露地面的新生代第三系地层及该地层风化后流失的土壤层。现将调查结果报道如下。
The incidence of gastric cancer in shallow drinking water residents drinking in Jiyuan County, Henan Province was significantly higher than that of residents drinking spring water or deep groundwater. However, the source of matter related to the onset of gastric cancer in shallow surface water has not been involved. This paper reports that the incidence of gastric cancer in residents drinking shallow water in the Cenozoic Tertiary geological outcrop area of Jiyuan County or drinking shallow water in the nearby downstream areas of the geological system is significantly higher than that in residents drinking away from this geological water system and other geological water systems. It is suggested that the substances related to the onset of gastric cancer in shallow water mainly come from the Cenozoic Tertiary strata where exposed the ground and the soil layer that was lost after the stratum weathered. The survey results are reported below.