The exploration of sedimentary bauxite deposits using the reflection seismic method: A case study from the Henan Province, China

Xue, Guangtao; Zhiyuan, LI; Guo, Wenbo; Fan, Jingsheng

doi:10.1016/j.oregeorev.2020.103832

Cited by 9 publications

(2 citation statements)

References 16 publications

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“…In recent years, geophysical exploration/monitoring methods, including seismic refraction, electromagnetic, electrical, resistivity, transient electromagnetic, and infrared detection methods, have been utilized to detect karst caves, faults, joint fissures, and water-bearing structures ahead of the tunnel face. Every method has its own advantages, disadvantages, and scopes of application [26][27][28][29][30][31]. Compared with other methods, the ground penetrating radar (GPR) method uses a mobile antenna to transmit electromagnetic waves to the researched object along the detection surface, then the received signals are displayed on the monitor in real time [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Quantitative Recognition of Filler Materials Ahead of a Tunnel Face via Time-Energy Density Analysis of Wavelet Transforms

Zhang

et al. 2022

Minerals

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Advanced geological prediction of tunnels has become an indispensable task to ensure the safety and effectiveness of tunnel construction before excavation in karst areas. Geological disasters caused by unfavorable geological conditions, such as karst caves, faults, and broken zones ahead of a tunnel face, are highly sudden and destructive. Determining how to predict the spatial location and geometric size of unfavorable geological bodies accurately is a challenging problem. In order to facilitate a three-dimensional quantitative analysis of the filler material ahead of the tunnel face, a biorthogonal wavelet with short support, linear phase, and highly matching waveform of ground penetrating radar (GPR) wavelet is constructed by lifting a simple and general initial filter on the basis of lifting wavelet theory. A method for a time–energy density analysis of wavelet transforms (TEDAWT) is proposed in accordance with the biorthogonal wavelet. Fifteen longitudinal and horizontal survey lines are used to detect void fillers of different heights. Then, static correction, DC bias, gain, band-pass filtering, and offset processing are performed in the original GPR profile to enhance reflected signals and converge diffraction signals. A slice map of GPR profile is generated in accordance with the relative position of longitudinal and horizontal survey lines in space. The wavelet transform analysis of a single-channel signal of each survey line is performed by adopting the TEDAWT method because of the similar rule of the single-channel signal of GPR on the waveform overlay and the ability of the constructed wavelet basis to highlight the time-frequency characteristics of GPR signals. The characteristic value points of the first and second interfaces of the void fillers can be clearly determined, and the three-dimensional spatial position and geometric sizes of different void fillers can be obtained. Therefore, the three-dimensional visualization of GPR data is realized. Results show that the TEDAWT method has a good practical application effect in the quantitative identification of void fillers, which provides a basis for the interpretation of advanced geological prediction data of tunnels and for the construction decision.

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Section: Introductionmentioning

confidence: 99%

Three-Dimensional Quantitative Recognition of Filler Materials Ahead of a Tunnel Face via Time-Energy Density Analysis of Wavelet Transforms

Zhang

et al. 2022

Minerals

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“…In particular, deep prospecting using geophysical-geological methods combined with geological methods has yet to be thoroughly studied. All of these have restricted the effective application of geophysical methods in deep prospecting and the development of geophysical techniques [6][7][8][9][10][11][12][13][14][15]. This paper analyzes the occurrence regularity of deep-seated gold deposits and the prerequisite of geophysical prospecting and proposes the geological-geophysical prospecting model for deep prospecting of the altered-rock-type gold deposits in fracture zones based on effective geophysical methods adopted in deep prospecting in the Jiaodong Peninsula.…”

Section: Introductionmentioning

confidence: 99%

A Geological-Geophysical Prospecting Model for Deep-Seated Gold Deposits in the Jiaodong Peninsula, China

et al. 2021

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The North China Craton is one of China’s major gold-producing areas. Breakthroughs have been continually made in deep prospecting at depths of 500–2000 m in the Jiaodong Peninsula, and geophysical methods have played an important role. Given that the geophysical signals of deep-seated gold deposits are difficult to detect, due to their thick overburden layers, conventional geophysical methods are not suitable for deep prospecting. Therefore, this study upgrades the geological-geophysical prospecting model, which is based on the deep metallogenic model and geophysical method of large exploration depths. Based on the analysis of the metallogenic geological factors of the altered-rock-type gold deposits in the fracture zones of the Jiaodong Peninsula, this study proposes that the gold deposits are controlled by large-scale faults, generally occur near the contact interfaces between the Early Precambrian metamorphic rock series and Mesozoic granitoids, and exhibit a stepped metallogenic model. This model then becomes the prerequisite and basic condition for deep prospecting by geophysical methods. For this reason, the traditional geophysical model, which focuses on the exploration of shallow mineralization anomalies, is transformed into a comprehensive multi-parameter geological-geophysical qualitative prospecting model highlighting the exploration of ore-controlling structural planes. The model adopts various frequency domain methods (e.g., CSAMT, AMT, WFEM), reflection seismology, and other methods to detect the deep geological structure. The characteristics of parameters such as gravity and magnetism, resistivity, polarizability, and the seismic reflection spectrum are applied to identify the ore-controlling fault location and dip angle change, and to estimate the ore-bearing location according to the stepped metallogenic model. The prospecting demonstration of deep-seated gold deposits in the Shuiwangzhuang mining area indicates the effectiveness of the comprehensive model. The comprehensive deep prospecting model effectively solves the problem of deep prospecting of gold deposits controlled by faults, promotes the great breakthrough of deep prospecting in the Jiaodong Peninsula, and provides an important technology demonstration for deep prospecting throughout China.

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Seismic Sequence and Source Analysis of Typical Sandstone Reservoirs

Chen,

Fan,

Wang

et al. 2024

Chem Technol Fuels Oils

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The exploration of sedimentary bauxite deposits using the reflection seismic method: A case study from the Henan Province, China

Cited by 9 publications

References 16 publications

Three-Dimensional Quantitative Recognition of Filler Materials Ahead of a Tunnel Face via Time-Energy Density Analysis of Wavelet Transforms

Three-Dimensional Quantitative Recognition of Filler Materials Ahead of a Tunnel Face via Time-Energy Density Analysis of Wavelet Transforms

A Geological-Geophysical Prospecting Model for Deep-Seated Gold Deposits in the Jiaodong Peninsula, China

Seismic Sequence and Source Analysis of Typical Sandstone Reservoirs

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