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Yuan B.-Q.,Xi'an Shiyou University | Yang G.-Y.,Xian West Approaches Geophysical Technology Development Co. | Liu J.-L.,Geophysical and Geochemical Exploration Team | Zhang C.-G.,Xi'an Shiyou University
Geological Bulletin of China | Year: 2014

In order to improve the effectiveness and practicability of sub-domain filtering method for identifying geological boundaries, the authors, based on the 1:50000 high precision data of gravity in EQ block of the Yin-E Basin, used small sub-domain filtering method, a total horizontal derivative method, and an improved small sub-domain filtering method combined with a total horizontal derivative method to process the gravity anomalies. The results of each method were discussed in this paper. Then the fault structures were inferred on the basis of the results obtained by the combined method. Compared with the interpretation results of the seismic and electrical profile, the combined method can prove the fault structures, which shows the significance and effectiveness of this combined method. Theoretical model test and practical application results show that the combined processing method sharpens the field source boundary, enhances the lateral identification capability, highlights the geological boundary features, and even makes the fault structural framework clearer. ©, 2014, Geological Bulletin of China. All right reserved.


Zhang C.-G.,Xi'an Shiyou University | Yang G.-Y.,Xian West Approaches Geophysical Technology Development Co. | Yan Y.-K.,Northwest University, China | Yuan B.-Q.,Xi'an Shiyou University
Geological Bulletin of China | Year: 2012

On the basis of analyzing features of magnetic characteristics of exposed rock and aeromagnetic anomalies, in combination with the information of local gravity anomalies and previous research achievements in the aspect of regional geology, the authors dis cussed the relationship between the aeromagnetic anomalies and igneous rocks, interpreted a gravity and magnetic section quantitatively, and then probed into the distribution regularity of the igneous rocks in Yingen-Ejin Banner basin. The results show that magnetic properties of all kinds of rocks are unevenly distributed in Yingen-Ejin Banner basin, and the magnetic properties of the intermediate rocks on the southeast side of Shaomaying and the intermediate rocks and acid rocks near Yingen are stronger, the magnetic properties of the exposed rocks in other areas are weak or close to zero, and the magnetic properties of the basic rocks are weak. Regional aeromagnetic anomalies reflect the features of the magnetic basement in Yingen-Ejin Banner basin, and the highs correspond to the Lower Proterozoic hypometamorphic rocks in western Ejin Banner and Suhaitu-Wuliji-Suhongtu area, while the lows correspond to the pre-Permian mid-epimetamorphic rocks in Ejinaqi-Lüyuan-Teluoxitan-Yingejing area and Yingen-Chagandelesu area; the local magnetic highs are caused by the intermediate-acid rocks in Ejin Banner, Shaomayingbei-Teluoxitan and Suhaituxi-Yingejing-Wuliji-Chagandelesu areas as well as the intermediate rocks in Shaomaying-Taolete-Teluoxitandong area, and magnetic substance in the sedimentary cover mainly results in local magnetic highs in Lüyuan-Wutaohai-Yingejing area; the regional faults control the distribution of magnetic intrusive rocks in Yingen-Ejin Banner basin.


Yang G.-Y.,Xian West Approaches Geophysical Technology Development Co. | Xiao T.-X.,Xian West Approaches Geophysical Technology Development Co.
Geological Bulletin of China | Year: 2010

In order to understand the distribution of Carboniferous-Permian in Ejina Banner and its vicinities, and provide evidence for oil and gas resources investigation and evaluation, through fine processing and interpretation of previous data and newly finished integrated geophysical survey sections, by using joint inversion of gravity, magnetic and electronic data under restriction of seismic and well data, this paper preliminarily presented the distribution and burial situation of Carboniferous-Permian residues in the region. Thus it is concluded that the Carboniferous-Permian strata show the characteristics of thicker residual and suitable depth. The method has solved the technical problem of Carboniferous-Permian distribution interpretation and provides evidence for Carboniferous-Permian research within the internal part of the basin.


Yan Y.-K.,Northwest University, China | Yuan B.-Q.,Xi'an Shiyou University | Yang G.-Y.,Xian West Approaches Geophysical Technology Development Co. | Zhang C.-G.,Xi'an Shiyou University | Shen A.-B.,Bureau of Mineral Resources
Geological Bulletin of China | Year: 2011

In order to study the structural features of Yingen-Ejinaqi basin and provide foundations for further oil and gas resources investigation and evaluation, the characteristics and causes of gravity field have been discussed and analyzed, and the fault systems have been speculated through collecting, processing and studying the existing gravity survey data in the area. Regional gravity anomalies in study area are mainly aroused by the undulation of Moho surface. On the one hand, gravity high and gravity low of residual gravity anomaly with alternative distribution reflect the distribution range and through-going features of the sag and uplift; on the other hand, maybe reflect the asymmetric faults which develop between the sag and the uplift in study area. Two mainly groups of fault, which play an important control role in the structure and properties of the basement, framework of uplift and depression and distribution of Mesozoic basin, with NEE (NE) and NWW trend respectively developed in the study area. The basement faults divide the study area into multiple blocks, which made the Basin with the features of alternate sag and uplift.

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