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The complex network research based on geochemical field in Nanling region

Author: WangJunYao
Tutor: PengNian
School: Capital Normal University
Course: Physical Geography
Keywords: Nanling range The geochemistry field Correlation analysis Convergentcorrelations Complex networks
CLC: P596
Type: Master's thesis
Year: 2013
Downloads: 23
Quote: 0
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Abstract


Nanling range is the important metallogenic prospective areas of non-ferrous metals, rare, rare earth and radioactive minerals in China. On the one hand, this area has advantage of mineralization intensity, mining foundation and geological work degree. On the other hand, the geological prospecting in Nanling range faces the metallogenic model dispute and a series of prospecting technology probloms. Therefore, the application of new mineralization theory and technology metallogenic prediction is of great significance for the further development of the mineral resources of the region, revealing the Nanling metallogenic mechanism.Based on of Nanling region1:200,000stream sediment data, we has carried on the correlation analysis (correlation analysis, cluster analysis, partial correlation) by SPSS and ARCGIS, and described the spatial heterogeneity analysis of Y, Be, Zr, Na, K, B by spatial variability analysis and univariate factor kriging. The results is:The Nanling region as a whole showed a weak correlation, chalcophile and siderophile elements, main ore-forming elements show a strong correlation and aggregation; high correlation between the main ore-forming elements in the spatial distribution is relatively concentrated, population distribution of high value area in the related coefficient figure of the three groups of W-Sn、Pb-Zn、Sb-Hg is compared to elements combination anomalies distribution of three groups; the anomalous total distribution direction is more for east-west or north to the east. It is quite similar to the conclusion of the predecessors that the tectonic belt of the north-east and the east-west is the biggest in Nanling range.we carried out the study of complex network of the geochemical field in Nanling range on the basis above.30kinds of chemical elements of the geochemistry field in this area were as the nodes of complex network, the nodes connected through33222stream sediment sampling points, we defined the connection strength between nodes in the network by related coefficient of30geochemical element value, further weak correlation gradually converge into a strong correlation through iterative method, then the complex network of the geochemistry field in Nanling range was constructed. Using Ucinet the Nanling region geochemical field structure of the complex network characteristics drawn from the analysis:Based on the complex network of elements has a smaller average shortest distance and large clustering coefficient with the characteristics of small-world networks; Most of element nodes have larger degree, point centrality and closeness centrality in the groups dominated by the elements with abnormal distribution, ore-forming elements, the nodes have smaller degree, point centrality and closeness centrality in the groups dominated by diagenetic elements. As the connected elements of network structure, Sr and Be have smaller gathered coefficient and larger betweenness centrality, that shows the two elements have a great influence to the connectivity of two groups. In addition, all the differences between descriptive statistics of point centrality and closeness centrality are small, this indicates there is no real core of the network and the relationship between all the elements are implemented through two groups.

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CLC: > Astronomy,Earth Sciences > Geology > Geochemistry > Regional geochemical landscape geochemistry
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