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| The application of the data management system of MT results to the study of electrical structure of the lighosphere: a case study in Northeast China |
| PEI Fa-Gen1,2, FANG Hui1,2, YUAN Yong-Zhen1,2, QIU Gen-Gen1,2, BAI Da-Wei1,2, DU Bing-Rui1,2, LI Li1,2 |
1. Institute of Geophysical and Geochemical Exploration, Langfang 065000, China;
2. Electromagnetic Detection Technology Key Laboratory of Ministry of Land and Resources, Langfang 065000, China |
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Abstract Northeast China is located in the overlapping parts of Ancient Asia tectonic domain and Pacific tectonic domain, and the region has experienced multiperiodic tectonic activities and strong magmatism. Plate collage and orogenesis occurred in pre-Mesozoic, and interplate tectonic transformation took place in Mesozoic-Cenozoic; in addition, there are some complex geological structures. To detect the lithosphere electrical structure of the region, the authors conducted the crust-mantle electrical structure study by a data management system of MT results. The crust-mantle electrical information of Northeast China was extracted by use of the query function and the searching function of the management system. The crust low-resistivity layer distribution and the lithosphere's thickness distribution of the study area were obtained by processing the information obtained. Some conclusions have been reached: ① The lithosphere thickness change is characterized by the relative thinness in the east and comparative thickness in the west. ②Different basins and mountains show different uplift-depression lithosphere characteristics. ③ The asthenosphere uplift in Jingbo Lake volcanic area and the uplifting might have been related to magma upwelling. This information could provide support for the study of regional tectonic evolution and dynamics.
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Received: 20 February 2014
Published: 10 August 2014
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