论文部分内容阅读
根据大地电磁测深结果，东秦岭河南叶县—湖北南漳地区的岩石层由4个电性单元组成，其中华北地块南缘为相对高温的低阻区；秦岭北部为低温的高阻异常区；南秦岭为高温的低阻区，岩石层平均厚度仅80km，南秦岭的南部推覆到扬子地块之上达40—50km；扬子地块为相对低温的中等电阻率区，岩石层厚度150—200km．利用秦岭地区地壳上地幔岩石样品高温高压条件下电阻率的测定结果推断了各单元岩石层内电性层可能的岩石组成类型，并建立了剖面通过地区岩石层的地电模型．
According to the result of MTF, the rock layers in Yexian-Nanzhang area of East Qinling are composed of four electrical units, of which the southern margin of North China block is relatively high-temperature low-resistivity zone and the northern part of Qinling Mountains is low-temperature high-resistivity anomaly Area. The South Qinling is a high-temperature low-resistivity area with an average thickness of only 80km in the rock mass. The southern part of the South Qinling Mountains is pushed up to 40-50km above the Yangtze block. The Yangtze block is a relatively low-temperature medium resistivity area. The rock layer thickness 150-200km. Based on the results of resistivity measurements of crust and upper mantle rock samples in Qinling area under high temperature and high pressure, the possible rock composition types of the lithofacies in each unit are deduced and the geoelectric model of the lithosphere through the area is established.