Micromotion is the daily tiny vibration of the earth</span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;">s surface. Micromotional exploratio...Micromotion is the daily tiny vibration of the earth</span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;">s surface. Micromotional exploration can use the surface wave information of micro motion to study the shallow structure of underground media. In this study, we collected microtremor data at 68 stations in the Middle-Lower Yangtze Metallogenic Belt (MLYMB) and determined the resonant frequency and obtained the distribution of sedimentary thickness in this area by using H/V spectral ratio. According to the results of H/V, the sedimentary layer in the basin is thick, and the predominant frequency of the basin is 0.05</span><span style="font-family:""> </span><span style="font-family:Verdana;">-</span><span style="font-family:""> </span><span style="font-family:Verdana;">0.1</span><span style="font-family:""> </span><span style="font-family:Verdana;">Hz. There are no obvious lateral changes in the impedance interface between bedrock and sedimentary layer in this area. The basement of Tongling, Anqing and Luzhou mining areas and their adjacent areas is Kongling-Dongling type basement, which is composed of a set of metamorphic core complex. The predominant frequency is 0.05</span><span style="font-family:""> </span><span style="font-family:Verdana;">-</span><span style="font-family:""> </span><span style="font-family:Verdana;">0.1</span><span style="font-family:""> </span><span style="font-family:Verdana;">Hz. The sedimentary thickness gradually thinned from 3800</span><span style="font-family:""> </span><span style="font-family:Verdana;">m in the west to 2100</span><span style="font-family:""> </span><span style="font-family:Verdana;">m in the East. Moreover, this article used SPAC (spatial autocorrelation) method to obtain the S-wave velocity structure of the mining area near Luzong. The SPAC method reveals that the depth of the interface between the loose sediments and the volcanic rocks is about 600 m in the study area near the Luzhou mining area in the Middle-Lower Yangtze Met展开更多
文摘Micromotion is the daily tiny vibration of the earth</span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;">s surface. Micromotional exploration can use the surface wave information of micro motion to study the shallow structure of underground media. In this study, we collected microtremor data at 68 stations in the Middle-Lower Yangtze Metallogenic Belt (MLYMB) and determined the resonant frequency and obtained the distribution of sedimentary thickness in this area by using H/V spectral ratio. According to the results of H/V, the sedimentary layer in the basin is thick, and the predominant frequency of the basin is 0.05</span><span style="font-family:""> </span><span style="font-family:Verdana;">-</span><span style="font-family:""> </span><span style="font-family:Verdana;">0.1</span><span style="font-family:""> </span><span style="font-family:Verdana;">Hz. There are no obvious lateral changes in the impedance interface between bedrock and sedimentary layer in this area. The basement of Tongling, Anqing and Luzhou mining areas and their adjacent areas is Kongling-Dongling type basement, which is composed of a set of metamorphic core complex. The predominant frequency is 0.05</span><span style="font-family:""> </span><span style="font-family:Verdana;">-</span><span style="font-family:""> </span><span style="font-family:Verdana;">0.1</span><span style="font-family:""> </span><span style="font-family:Verdana;">Hz. The sedimentary thickness gradually thinned from 3800</span><span style="font-family:""> </span><span style="font-family:Verdana;">m in the west to 2100</span><span style="font-family:""> </span><span style="font-family:Verdana;">m in the East. Moreover, this article used SPAC (spatial autocorrelation) method to obtain the S-wave velocity structure of the mining area near Luzong. The SPAC method reveals that the depth of the interface between the loose sediments and the volcanic rocks is about 600 m in the study area near the Luzhou mining area in the Middle-Lower Yangtze Met
