山东省聊城市“聊茌东”都市区地球化学背景值研究

Study on Geochemical Background Values of Liaochidong Metropolital Area in Liaocheng City in Shandong Province

摘要:

基于大比例尺土地质量地球化学调查获取的海量数据对于区县级地球化学背景值研究具有重要意义。通过对聊城市东昌府区、茌平区和东阿县调查获取的表层土壤分析数据进行统计，得出了基于调查区、地质单元、土壤类型单元和行政区单元等表层土壤各指标的地球化学背景值，并与聊城市和山东省进行对比。结果表明：调查区绝大部分指标总体分布均匀，Hg、S、Se、I、Cd、P含量变化相对较大；背景值与聊城市和山东省相比大致相当或偏高，分别有14项和16项指标的地球化学背景值高于全市和全省，仅Al2O3略低于全省背景值。调查区的主要地质单元第四纪单县组、巨野组和鱼台组各指标地球化学背景值均与全区一致；黑土湖组和黄河组均有7项指标低于全区，仅黄河组CaO略高于全区。调查区土壤类型单元中潮土、脱潮土、盐化潮土、草甸盐土和碱化潮土中绝大部分指标地球化学背景值与全区一致；I元素在脱潮土中略高于全区，在草甸盐土和盐化潮土中略低于全区；S元素在草甸盐土中略高于全区；草甸风沙土和冲积土分别有21项和8项指标低于全区，仅CaO在冲积土中略高于全区。行政区划单元背景值中东昌府区和茌平区与全区背景值一致，东阿县仅P和I略低于全区，CaO略高于全区。

Abstract:

The massive data obtained based on the largescale land quality geochemical survey is of great significance for the study of geochemical background value at the district and county level. Based on the statistics of surface soil analysis data obtained from Dongchangfu district, Chiping district and Dong'e county in Liaocheng city, geochemical background values of surface soil indexes based on geological units, soil type units, and administrative area units have been obtained and compared with Liaocheng city and Shandong province. It is showed that the distribution of most indexes in the survey area is generally uniform, whereas the contents of Hg, S, Se, I, Cd and P have relatively large changes. Comparing with background values of Liaocheng city and Shandong province, background values of the whole area are mainly roughly equivalent or higher. There are 14 and 16 indicators higher than those of the whole city and the whole province respectively. Only Al2O3 is slightly lower than that of the whole province. The geochemical background values of Quaternary Shanxian formation, Juye formation and Yutai formation in the survey area are consistent with the whole area. Heituhu formation and the Huanghe formation have 7 indexes lower than the whole survey area, and only CaO of Huanghe group is slightly higher than the whole area. The geochemical background values of most indexes in fluvoaquic soil, detidal soil, salinized fluvoaquic soil, meadow saline soil and alkaline fluvoaquic soil type units in the survey area are consistent with those of the whole area. The element I is slightly higher in detidal soil，and slightly lower in meadow saline soil and salinization tidal soil than that in the whole region. The element S is slightly higher in meadow saline soil than in the whole area. There are 21 and 8 indexes in meadow aeolian sandy soil and alluvial soil respectively, which are lower than those in the whole region, and only CaO is slightly higher than that in alluvial soil. The background values of administrative division units in Dongchangfu district and Chiping district are consistent with the background values of the whole area，whereas in Dong'e county，only elements P and I are slightly lower than the whole area, and CaO is slightly higher than the whole area.