Statistical analysis of tectonic patterns in areal volcanism: The bunyaruguru volcanic field in West Uganda |
| |
| Authors: | Keith J Tinkler |
| |
| Institution: | (1) Department of Geography, Makerere University, Uganda |
| |
| Abstract: | A quantitative analysis was made of the spatial arrangement of 149explosion craters in the western rift of Uganda. A variety of methods demonstrate that the spatial pattern of the craters reveals significant structural patterns that have guided volcanism to the surface. It is shown that the east-west elements in the field affected location, and the main rift fault is resolved into two main components. Tentatively, a possible dextral transform fault is identified that affected the relative location of the two main zones of activity. Grouping techniques demonstrate that crater groups obey an exponential rank-size rule and allow a mapping of the craters into energy classes that reveals a concentric pattern of energy in the field. The effect of the topography on energy levels and crater size show that only topography greater than 11,000ft could have prevented all eruptive activity, but the smaller energies and craters are sensitive to height differences on the order of the height of the rift wall, about 1000ft. Total energy in each crater class size is roughly constant, and the field energy could create one or two single craters comparable in size to small central volcanoes. |
| |
| Keywords: | nearest neighbor analysis regression analysis statistics trend analysis structure |
| 本文献已被 SpringerLink 等数据库收录！ |
|
