application of seismic reflection method

Seismic reflection is generally applicable to depths greater than 80 to 100 feet, and is widely used on land to map a variety of deep features (e.g., stratigraphy, faults). This technique does, however, have other applications on a smaller scale, such as for civil engineering project site investigation. 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. Among these is the ENE-trending fault, F1, which traverses the whole area and has played an important role in the formation and development of the mineralization. First, study of the metallogenic and geological conditions is important. [1] [4] Recent work [10] has mathematically demonstrated applications of crosscorrelation for reconstructing Green's function using wave field reciprocity theorem in a lossless, 3D heterogeneous medium. The displacement of the fault is about 0.4–0.5 km (unpublished data from Northwest Jiangxi Geological Team, 1985). In the ore area, fault F1 is not only an ore-conducting structure but also the ore-hosting site, together with the surrounding secondary en échelon plumose fractures. The new shallow seismic exploration method can be used for solid-ore exploration only if the seismic data resolve the solid mineral resources. Pilot seismic reflection profile - measurement, processing, interpretation The shallow seismic reflection method (especially its CDP variation) was introduced into practical work in solving engineering assignments only a few years ago. ApplicationAdvance in seismic reflection profiling for UScoal exploration bFigure 1a is a seismic section obtained usinga linear sweep, figure 1b the same intervalwas made with a nonlinear sweep and figure cConoco prototype vibrator being used as ahigh-frequency source in coal exploration 12/8/16 Figure1 Shallow seismic profile above -600 m altitude for line RJ and the interpreted image (exploration line 10). For instance, all ore-bearing drill holes are located to the north of fault F1, indicating a directional tectono-metallogeneic migration. Typical applications of seismic reflection include: For more information, please contact our Ground Survey Team. In the following, various applications of the shallow seismic methods are demonstrated by a number of examples. 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. Seismic Reflection Methods 1. This paper describes a case study in which the shallow seismic exploration method was used to investigate the subsurface structure of the Yangji-Shan gold deposit in Jiangxi Province, south China. Multiple-well techniques. The depth scale is in metres and the horizontal axis shows the CDP number at intervals of 2.5 m. Shallow seismic section interpretation images of exploration line JB in the Yangji-Shan gold deposit (exploration line 14). Containment of the air-blast is essential in shallow reflection work. This is possibly a contact zone between cryptoexplosive breccias (or quartz dioritic porphyrites) and sedimentary strata. The width of the intrusion increases gradually downwards and is also sack-like; it clearly intrudes into the structural crush zone. 21, Application of Modern Optimization Algorithm in Management Science, pp. The seismic profiles indicate the possible existence of other cryptoexplosive breccias (or quartz dioritic porphyrites) at -600 m, where the contact region between the inferred igneous rocks and the wall rocks clearly contains a crush zone. The seismic reflection method is 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. 3. It is reasonable to infer that such a crush zone associated with cryptoexplosive breccias might be a favourable site for gold deposition. 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). The results of two seismic exploration profiles (RJ and JB) are illustrated in figures 3 and 4, respectively. Upper Devonian (D3); 4. The drilling data can be used to divide the bedrock lithology and confirm the geophysical results. Seismic attribute analysis can extract information from seismic data that is, otherwise, hidden in the data and have been used to identify prospects, ascertain depositional environments. The seismic reflection method usually gives better resolution (i.e., makes it possible to see smaller features) than other methods, with the exception of measurements made in close proximity, as with borehole logs (see below). Originally used solely as a resource exploration tool, the seismic method now routinely contributes to coal-mine design and development. In some cases, seismic patterns can be identified with depositional systems, unconformities, channels, and other features. for seismic reflector characterisation: method and application N. Maercklin, A. Zollo RISSC, Italy Abstract: Elastic parameters derived from seismic reflection data provide information on the lithological contrast at an interface and support the geolo-gical interpretation. 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. In combination with the study of regional metallogenic characteristics, the shallow seismic exploration method has potential for the discovery and exploration of solid mineral resources. 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