This technique does, however, have other applications on a smaller scale, such as for civil engineering project site investigation. The interpretation is based on Heiland (1946). Vertical seismic profiling (commonly abbreviated to the name VSP) is a major technique in geophysical exploration, which involves measuring downgoing and upgoing seismic wavefields through a stratigraphic sequence. Application of seismic reflection wave method in high water content sand-layered dike detection. This article presents a description of the lithology and weathered features of the subsurface under Qiaozhuang Town through a 2-D interpretation based on a shallow seismic reflection geophysical survey. In combination with the study of regional metallogeneic characteristics, shallow seismic exploration can provide a potential approach to locating and exploring solid mineral resources. This fault is considered as an ore-hosting conduit of the Yangji-Shan gold deposit. In this article, we derive an approximate equation and propose a dominant and central frequency shift (DCFS) method by combining the quality factor Q , the travel time, and dominant and central frequencies of two successive seismic signals along the … The width of the intrusion increases gradually downwards and is also sack-like; it clearly intrudes into the structural crush zone. Using basic geological observations, we attempt to interpret geologically the seismic profiles obtained, which show various lithological interfaces. Shallow reflection surveys The shallow reflection method is by far the most effective geophysical technique for detailed and reliable imaging of the subsurface structure. FA is still active in the Tertiary and along the fracture zone where the Tertiary basaltic magmas erupted. This section focuses on the tectono-metallogenic process, i.e. First, study of the metallogenic and geological conditions is important. Common-Offset Seismic Reflection Method A technique for obtaining one-fold reflection data is called the common-offset method or common-offset gather (COG). 3. FA is now a tensile-shear fault and was active prior to diagenesis, which led to a non-sequence in the strata on the south side. Originally used solely as a resource exploration tool, the seismic method now routinely contributes to coal-mine design and development. Fractures (F); 10. The shallow seismic exploration method has been used extensively in petroleum exploration and geological engineering, but whether or not it is suitable for solid-ore exploration is still uncertain since solid ore deposits are usually irregularly shaped. In some cases, seismic patterns can be identified with depositional systems, unconformities, channels, and other features. Search for other works by this author on: Chinese Academy of Sciences, Institute of Geology and Geophysics, Beijing 100037, China, Preliminary research on the tectono-metallogeny in the Yangji-Shan gold deposit and its prospecting, Ore-controlling structure of the Yangji-Shan gold deposit in Jiangxi and ore-searching indicator, Model of copper and gold metallogenic series in Jiujiang-Ruichang area, Jiangxi, Iron-Copper(Gold) Metallogenic Laws in the Middle-Lower Reaches of the Yangtze River, Enrichment laws of gold in the Yangji-Shan cryptoexplosive breccia-type gold deposit, Jiangxi, © 2004 Nanjing Institute of Geophysical Prospecting, The effects of tool eccentricity on individual P and S head waves in monopole acoustic LWD, Upper Cretaceous paleoenvironmental changes and petrophysical responses in lacustrine record (Songliao Basin, NE China) and marine sedimentary deposit (Goban Spur Basin, NW Europe), Data-driven method for an improved linearised AVO inversion, Evaluating the effect of EPBM operational parameters on surface settlement in soft ground, Estimation of weak anisotropy parameters and fracture density of asymmetric fractures in monoclinic medium, About Journal of Geophysics and Engineering, About Sinopec Geophysical Research Institute, 2 Geological and metallogenic conditions of the Yangji-Shan gold deposit, https://doi.org/10.1088/1742-2132/1/1/002, Receive exclusive offers and updates from Oxford Academic, Copyright © 2021 Sinopec Geophysical Research Institute. Based on the general characteristics of tectono-metallogenesis of the Yangji-Shan gold deposit, we now describe in detail the shallow seismic profiles of -430 m. Both the crush zones and magmatic channel are potential sites for gold mineralization. Seismic Reflection and Refraction Methods A. K. Chaubey National Institute of Oceanography, Dona Paula, Goa-403 004. email@example.com Introduction Seismic reflection and refraction is the principal seismic method by which the petroleum industry explores hydrocarbon-trapping structures in sedimentary basins. We have applied the shallow seismic exploration method in this area with the aim of locating and investigating new mineral resources and potential gold ores. A magmatic channel is present above the pluton. Crush zone (Sb); 8. seismic reflection). search for low velocity zones using reflection seismic, so that the vulnerable locations causing earthquakes in the area are obtained. The theory is identical, but the acquisition and processing parameters are adjusted to provide a higher resolution at shallow depths. In most cases a 12-channel system was used. 4. Seismic survey is the geophysical method, which is most closely related to rock and soil mass properties, since seismic wave velocity varies with the main mechanical properties, such as Poisson’s ratios and others modules. The structural deformation and gold mineralization have migrated in a common NNE direction. The displacement of the fault is about 0.4–0.5 km (unpublished data from Northwest Jiangxi Geological Team, 1985). Seismic method is one of the main tools of assessing fault activity. The major characteristics of tectono-metallogenesis of the Yangji-Shan gold deposit are summarized as follows. Cryptoexplosive breccias (NQδμ); 7. 2. Application of seismic reflection techniques for imaging sedimentary hosted massive sulphide is relatively new and the few experiment carried out have are at local scale  In this report, we extend the work of  by applying seismic reflection surveys for detecting massive sulphide deposits in sediment hosted environment at larger scale were the deposit may be located within 5km or more. Application of an undulatory method of reflection seismics to the biomedical field September 2020 : Physical Review Applied publishes the article "Seismic Imaging Method for Medical Ultrasound Systems" where the CRS4 Imaging and Numerical Geophysics group successfully validates the idea of applying an undulatory method of reflection seismics to the biomedical field . Based on the geological results presented above, we point out the possibility that gold orebodies may occur between lines 14 and 16 in the Yangji-Shan site. Variations in field techniques are required depending on depth. Geological sketch of the Yangji-Shan gold deposit. Below -600 m, Silurian sandstones occur in this region. Guanghao Chen, Guanghe Liang, Deru Xu, Qiaosong Zeng, Shouhui Fu, Xiangrong Wei, Zhuanli He, Gonggu Fu, Application of a shallow seismic reflection method to the exploration of a gold deposit, Journal of Geophysics and Engineering, Volume 1, Issue 1, March 2004, Pages 12–16, https://doi.org/10.1088/1742-2132/1/1/002. This means that gold has migrated and concentrated either along one flank of the fracture or from the centre to the periphery under the tectono-thermal dynamic conditions that prevailed in the Yangji-Shan area at the time of deposition (Zhang 1992, Cui 1995, Chen et al 1998). This method of seismic refraction is common and provides a depth to bedrock under each shot location. Application of the technique to data from a deep seis-mic reﬂection experiment enhanced the visibility of all reﬂectors considerably. Typical applications of seismic reflection include: For more information, please contact our Ground Survey Team. Since it is possible to distinguish between the seismic velocities of different objects, the seismic velocity structures for different lithologic layers are discontinuous and they all converge towards the location of current mining activity. In general, the fraction of an orebody that is revealed at different depths is strictly controlled by the regional structure (Zhai and Yao 1992, Chen et al 1999). Seismic reflection is ideal for mapping geology at depths exceeding 50 m. Deep seismic reflection surveying is the most advanced technique in geophysics today, thanks to its application on a huge scale for oil and gas exploration. The weak zone in the subsurface structure can be modeled by using seismic reflection method based on the wave propagation properties that can reflect in a certain A concealed magmatic channel adjacent to lines 8–12 also exists. - Coal investigation with 2D-3D modelling. If our conclusion is correct, this locality might be another favourable site for gold mineralization. To prevent stack degeneration, any … 95% of the water used for human production and living comes from groundwater. When we create sound at or near the surface of the earth, some energy will be re ected back (bounced back). The use of seismic reflection surveys for targets shallower than 30 m has not been widespread until the 1980’s, however. Additionally, since the 1980’s, significant strides have been made in both near-surface seismic reflection surveying and in the development of shallow-seismic refraction methods. The upper right-hand figure shows the section after improving the resolution. This velocity is di erent for di erent rocks and it is this di erence which is exploited in the seismic method. It is separated from the Niaoshijie-Saihu faulting basin by ENE-trending faults. The shallow seismic exploration method has been used extensively in petroleum exploration and geological engineering, particularly in karst regions. Application of the three-component shallow seismic reflection method to probing buried active faults: LIU Bao-Jin 1, ZHAO Cheng-Bin 1, FENG Shao-Ying 1, YANG Xiao-Ping 2, HE Yin-Juan 1, LI Wen 1, ZUO Ying 1, KOU Kun-Peng 1: 1. Seismic reflection data have been acquired for coal mining operations in Australian coal basins for over 30 years. For a more rigorous discussion of refraction and reflection seismology, visit An Introduction to Geophysical Exploration Check out equipment and seismic refraction applications in industry at Geosphere Inc. Lithoprobe is a Canadian program to study North American continental crust using refraction seismology as one of many exploration methods. Seismic interferometry provides for the possibility of reconstructing the subsurface reflection response using the crosscorrelations of two seismic traces. 1.1.3 This guide will focus on the seismic-reflection method as it is applied to the near surface. Below -450 m, a soft band extends downwards to -600 m. This is interpreted as an ore-bearing magmatic channel probably composed of ore-bearing cryptoexplosive breccias. The sedimentary rocks experienced strong later silicification in the ore area, either as a result of the gold mineralization process or the emplacement of quartz dioritic porphyrites. Data resolve the solid mineral resources data, it is applied to the near surface the! Along fault F1 resulted in the following three stages: data acquisition, processing and interpretation, E. Takacs I.. 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