The application of anomaly contrast to extracting geochemical anomaly information: A study of Duobaoshan area in Heilongjiang Province
Liang CHEN1,2, Hui-Yan WANG1,2, Cheng-Ye SUN1,2
1. Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China 2. State Research Center of Modern Geological Exploration Engineering Technology, Langfang 065000, China
In large-area soil geochemical survey, different geological units have different geochemical backgrounds, forming multiple backgrounds. Geochemical data from different map sheets exhibit deviation caused by sampling methods or analytical methods. This paper aims at leveling the geochemical data from Duobaoshan area of Heilongjiang Province, dividing different geological units into subareas, making normalization processing for data of different subarea, then calculating anomaly contrast based on sampling sites and acquiring element anomalies. In addition,, specification processing can be made for anomaly contrast, and comprehensive anomaly information can be extracted. The above method can effectively reduce background differences and avoid false anomaly. Finally, many gold orebodies were found in the later exploration by the anomaly inspection of certain comprehensive anomalies, which can prove the effectiveness of this method in extracting abnormal information.
陈亮, 王惠艳, 孙诚业. 多背景下异常衬值法在地球化学异常信息提取中的应用——以黑龙江多宝山地区为例[J]. 物探与化探, 2018, 42(6): 1150-1155.
Liang CHEN, Hui-Yan WANG, Cheng-Ye SUN. The application of anomaly contrast to extracting geochemical anomaly information: A study of Duobaoshan area in Heilongjiang Province. Geophysical and Geochemical Exploration, 2018, 42(6): 1150-1155.
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