Exploration Geochemistry

Cohen, David R.

doi:10.1016/b978-0-08-095975-7.01127-x

Cited by 15 publications

(4 citation statements)

References 71 publications

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“…The primary goal of geochemistry is to unravel the complex chemical interactions between Earth's materials, enabling geoscientists to decipher the past, present, and future of our planet. In the geological field, geochemistry serves as a fundamental tool for investigating a wide range of phenomena, from petrology and mineral exploration to environmental studies and geochronology [65]. Its utility extends to the identification of active buried faults, where it proves invaluable.…”

Section: Geochemistry: a Tool For Archaeoseismologymentioning

confidence: 99%

Unraveling the Seismic Source in Archaeoseismology: A Combined Approach on Local Site Effects and Geochemical Data Integration

Bottari,

Capizzi,

Sortino

2024

Heritage

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Archaeoseismological research often deals with two unresolved questions: the magnitude and level of damage caused by past earthquakes, and the precise location of the seismic source. We propose a comprehensive review of an integrated approach that combines site effects with the analysis of geochemical data in the field of archaeoseismology. This approach aims to identify active buried faults potentially related to the causative seismic source and provide insights into earthquake parameters. For each integrated method, we report the foundational principles, delineation of theoretical field procedures, and exemplification through two case studies. Site effects analysis in archaeoseismology assumes a pivotal role in unraveling historical seismic occurrences. It enables estimating the earthquake magnitude, assessing the seismotectonic patterns, and determining the resulting damage level. Valuable data related to earthquake parameters can be extracted by analyzing vibration frequencies and acceleration measurements from structures within archaeological sites. This information is instrumental in characterizing seismic events, evaluating their impact on ancient structures, and enhancing our understanding of earthquake hazards within the archaeological context. Geochemical investigations supply indispensable tools for identifying buried active faults. The analysis of fluids and gases vented in proximity to faults yields valuable insights into their nature, activity, and underlying mechanisms. Faults often manifest distinctive geochemical imprints, enabling the differentiation between tectonically active and volcanically related fault systems. The presence of specific gases can further serve as indicators of the environmental conditions surrounding these fault networks. Integrating site effects analysis and geochemical investigations within archaeoseismological research is crucial to improving our understanding of unknown past earthquakes. Moreover, it enhances the seismic hazard assessment of the region under study.

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Section: Geochemistry: a Tool For Archaeoseismologymentioning

confidence: 99%

Unraveling the Seismic Source in Archaeoseismology: A Combined Approach on Local Site Effects and Geochemical Data Integration

Bottari,

Capizzi,

Sortino

2024

Heritage

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“…As easy-to-exploit mineral resources are gradually exploited (Baudeta et al, 2018;Farahbakhsh et al, 2020), the prospecting work in covered areas draws increasing attention from the geoscience community (Arai et al, 2021;Li et al, 2021;Salama et al, 2021). In recent years, new techniques have been brought forth one after another for prospecting in covered areas, while lots of researchers have studied the path of element migration and its influencing factors using unconventional geochemical prospecting technology (Mohammadi et al, 2016;Schumacher, 2000;Cohen et al, 2014). Most of them adopt the deep-penetrating geochemical prospecting technology and make use of geochemical databased mathematical models and computer techniques to sort out, evaluate and predict relevant information, so as to reveal the migration process of elements and establish a quantitative model.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Simulation on the Vertical Migration of Ore-forming Elements in Soil Cover

Zhang¹,

F.²,

Xie³

et al. 2023

Preprint

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For deep-penetrating geochemistry, there is a frontier issue as to how to explore ore-bearing information deep in covered areas, while it is, too, important to investigate the geochemical migration of ore-forming elements for the development of exploration geochemistry. In this study, a 380-day migration column experiment was conducted with surface soil and pure Cu powder collected from the Yujiashan study area in Wuhan City, Hubei Province taken as the object of research to simulate the migration process of ore-forming elements under natural conditions. The results showed obvious vertical migration of the ore-forming elements and conversion of mobile metal forms in the process; further, according to 6 groups of simulation experiments that took 45 days to conduct on migration column samples and the surface oil and Cu powder collected from the Pulang mining area in Yunnan Province, the vertical migration of the ore-forming element was still visible, and the exogenous substance (pure Cu powder) could enhance the anomaly without changing the basic migration mechanism. This indicates that Cu might migrate in a stable manner in soil cover in the Pulang mining area, and its migration was mostly driven by the transformation of Fe-Mn oxide bound state and organic bound state; finally, a multifractal analysis was conducted, revealing that the ore-forming elements presented a nonlinear and complex structure during their upward migration, which caused anomalies in the covered area, and multiple parameters exerted a certain indicative effect on different source intensities and properties of soil. In this study, laboratory simulations were performed to summarize the active-state evolution pattern and migration mechanism of ore-forming elements with a view to providing technical support and theoretical guidance for geochemical prospecting in the covered region.

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“…Geochemical anomalies have become more significant in the process of regional mineral prediction in recent decades. Geochemical element distribution patterns at the surface are the result of several primary and secondary geological processes [13,14].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Au-Associated Minerals in Eastern Thailand Based on Stream Sediment Geochemical Data Analysis by S-A Multifractal Model

Yaisamut¹,

Xie²,

Charusiri³

et al. 2023

Preprint

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Conducted within the scope of geochemical exploration in Eastern Thailand, this study aims to detect geochemical anomalies and potential mineral deposits. The objective was to interpret intricate spatial dispersion patterns and concentration levels of deposit pathfinder elements, specifically arsenic (As), copper (Cu), and zinc (Zn), using a comprehensive array of stream sediment geochemistry data. Methodologies involved integrating multifractal properties and traditional statistics, facilitated by the GeoDAS and ArcGIS platforms as instrumental analytical tools. In total, 5,376 stream sediment samples were collected and evaluated, leading to the development of an in-depth geochemical map. The results indicated distinct geological units marked by substantially elevated average values of the aforementioned elements. Identification of geochemical anomalies was achieved through the spatial distribution method and the subsequent application of the Spectrum-Area (S-A) multifractal model. An intriguing link was found between high As concentrations and gold deposits in the area, suggesting As as a viable pathfinder element for gold mineralization. The anomaly maps, generated from the stream sediment data, spotlighted potential zones of interest, offering valuable guidance for future mineral exploration and geological inquiries. Nonetheless, it is vital to recognize that the increased values noted in these maps may be influenced by regional geological factors, emphasizing the necessity for a diverse set of analytical methods for accurate interpretation. The study's significance lies in its pioneering use of the S-A multifractal model in geochemical data analysis. This innovative approach has deepened our comprehension of geochemical dispersion patterns and improved the precision of mineral exploration.

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Exploration Geochemistry

Cited by 15 publications

References 71 publications

Unraveling the Seismic Source in Archaeoseismology: A Combined Approach on Local Site Effects and Geochemical Data Integration

Unraveling the Seismic Source in Archaeoseismology: A Combined Approach on Local Site Effects and Geochemical Data Integration

Mechanical Simulation on the Vertical Migration of Ore-forming Elements in Soil Cover

Prediction of Au-Associated Minerals in Eastern Thailand Based on Stream Sediment Geochemical Data Analysis by S-A Multifractal Model

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