|
|
|
| THE AUTOMATIC METHOD FOR ANOMALY NUMBERING AND ANOMALY EVALUATION |
| ZHANG Mao-zhong, YANG Le-chao, CHEN Qi-wei, YANG Zhen-hong |
| Chongqing Bureau of Geology and Mineral Resources Exploration & Development, Chongqing 400038, China |
|
|
|
|
Abstract The anomaly numbering and anomaly evaluation classification reguire heavy workload and high technique. The Visual Basic program can realize full automation of anomaly numbering and anomaly evaluation. This method is rapid, accurate and flexible in that it can process geochemical data of 3 600 km2 on the scale of 1：50 000 within one hour. Firstly, the Visual Basic collects the background value of different geological units. According to the working scale, it chooses suitable parameters such as search radius and point controls area during its operation. By using temporary memory, the program searches for independent anomaly of each element, automatically numbers the anomaly and works out the abnormal parameters, and finally finds out each composite anomaly. The output includes such items as the coordinate origin of the anomaly of each element, the maximum value of anomaly, the average value of anomaly, the coefficient of variation, the enrichment coefficient, the superimposing strength, the anomaly area, the areal productivity, the element sequence of each composite anomaly, the contact ratio of anomaly, and the composite index of anomaly evaluation. The output provides more complete information about anomaly for choosing and creating new indexes of anomaly evaluation classification.
|
|
Received: 15 November 2013
Published: 10 April 2014
|
|
|
|
|
|
| [1] |
WANG Bin, LUO Yan-Jun, MENG Guang-Lu, ZHANG Jing, ZHANG Hai-Di, CHEN Bo, HE Zi-Xin. Potential assessment of gold, copper, lead, zinc, tungsten, and tin deposits in Kyrgyzstan based on 1∶1 000 000 scale geochemical data[J]. Geophysical and Geochemical Exploration, 2022, 46(1): 58-69. |
| [2] |
ZHAO Ze-Lin, LI Jun-Jian, ZHANG Tong, NI Zhen-Ping, PENG Yi, SONG Li-Jun. Geological characteristics and prospecting direction of rare earth element deposits in North China[J]. Geophysical and Geochemical Exploration, 2022, 46(1): 46-57. |
|
|
|
|
