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| Electrical property of Mohe basin in Northeast China and its geological significance |
| LIU Chang-Wang1, 2, 3, HE Mei-Xing1, 2, 3, DU Bing-Rui1, 2, 3 |
1. Key Laboratory of Geophysical electromagnetic Detection Technology, Ministry of Land and Resources, Langfang 065000, China;
2. National Modern Geological Exploration Technology Research Center, Langfang 065000, China;
3. Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China |
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Abstract For the purpose of supporting gas hydrate resources exploration, audio frequency magnetotelluric sounding was carried out in the northern part of Mohe basin in Northeast China. Through a comparative analysis of two-dimensional geoelectrical section interpretation result of audio frequency magnetotelluric sounding and planar resistivity characteristics, the authors conducted division of electrical property units and faults, and perfected "one uplift and one depression" structural framework in northwestern littoral uplift area of Mohe basis, thus forming geological-structural framework of "two uplifts and two depressions, alternate uplift and depression". Spatial distribution characteristics of regional faulted structure were preliminarily found out; F2, F4 and F8 faults somewhat control the secondary structural framework. In combination with physical character of strata and thickness of permafrost distribution, the authors made an analysis of the favorable conditions for the formation of gas hydrate reservoirs and pointed out that the area to the south of Beihongcun, i.e., electrical property unit ③ is favorable for the formation of gas hydrate reservoirs.
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Received: 08 September 2017
Published: 20 December 2017
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