According to the variation characteristics of the geochemical background in this basin, the authors determined the techniques for data processing and anomaly appraisal.
According to the variation characteristics of the geochemical background in this basin, the authors determined the techniques for data processing and anomaly appraisal.
背景场具有自东南（固原凹陷）向西北（海原凹陷）由高变低的趋势。