关键词: 地球化学, 元素共生组合, 主矿化元素, 定量组合求异, 空间分带性, 云南墨江

Abstract:

Because of the multi-phase and multi-sources of metallogenic process, the geochemical elements of metallogenic province were showed the symbiosis characteristic in space. For the sake of depicting the types and characters of symbiosis characteristic, the authors proposed a spatial quantitative combination seek-different method of the geochemistry elements, and the factor Pan-Kriging model, multiple sequences typical of the trend surface model and characteristics of combined model were built. By using these three models, the authors took the 1/200 000 geochemical exploration data of Mojiang area in Ailaoshan of Yunnan Province as for the processing example to improve the forecast accuracy and to depict the mineral anomaly from various aspects. The result shows that there existed four type of anomalies, and this reflected the characteristics of element association under different geological conditions and an internal coordinating mechanism and spatial relation during the diagenetic and metallogenetic processes. As conclusion, when the procedure of metallogenic prediction, the different types of the quantitative combination anomalies and its geological background would be considered.

Key words: geochemistry, element association, main mineralized elements, quantitative combination seek-different, spacial zonation, Mojiang,Yunnan Province