摘要
由于成矿过程的多期性与多源性,成矿区地球化学元素在空间上表现出共生组合特征。为刻画组合特征的类型与特点,提出一种地球化学元素空间定量组合求异方法,构建了因子泛克里格模型、多元序列典型趋势面模型及特征分析组合模型。将上述3种空间定量组合求异模型应用于云南哀牢山墨江地区1∶20万化探数据进行处理分析,目的在于从多元角度刻画元素异常,提高矿异常预测精度。计算结果表明:该区存在4种异常类型,反映了不同地质条件下元素共生组合及其在成岩成矿过程中的内在组配机制和空间关系。由此得出结论:在成矿预测过程中应按不同的定量组合异常类型及其相应地质背景进行预测。
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.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2010年第2期461-468,共8页
Journal of Jilin University：Earth Science Edition
基金
国家'十一.五'科技支撑项目(2006BAB01B10)
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
geochemistry
element association
main mineralized elements
quantitative combination seek-different
spacial zonation
Mojiang
Yunnan Province
