Comparison of efficiency of techniques for delineating uni-element anomalies from stream sediment geochemical landscapes

Shahrestani, Shahed; Mokhtari, Ali; Carranza, Emmanuel John M.; Hosseini-Dinani, Hengameh

doi:10.1016/j.gexplo.2018.12.001

Cited by 13 publications

(3 citation statements)

References 56 publications

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“…The identification of geochemical anomalies from stream sediment geochemical data provides significant information for mineral exploration, especially in the preliminary stages (Carranza and Hale, 1997;Cheng, 1999Cheng, , 2007Carranza, 2004;Zuo et al, 2013Zuo et al, , 2015Zuo et al, , 2009Wang et al, 2014Wang et al, , 2018Ghezelbash et al, 2019). In the past few decades, a variety of new mapping techniques have been developed and applied for stream sediment geochemical anomaly mapping (Stanley and Sinclair, 1989;Cheng, 1999Cheng, , 2007Carranza, 2004Carranza, , 2010aYousefi et al, 2013;Mokhtari and Garousi Nezhad, 2015;Zuo et al, 2015;Kirkwood et al, 2016;Zuo, 2016Zuo, , 2017Zuo and Xiong, 2018;Parsa et al, 2018Parsa et al, , 2017Wang et al, 2018;Ghezelbash et al, 2019;Shahrestani et al, 2019;Ayari et al, 2022;Nforba et al, 2022;Ghasemzadeh et al, 2022). Anomalies in stream sediment geochemical data can be identified as either discrete or continuous fields (Carranza, 2008(Carranza, , 2010b, depending on whether or not the spatial representation of such data considers the geomorphological constraints of watersheds.…”

Section: Introductionmentioning

confidence: 99%

“…In this regard, many methods have been proposed for anomaly mapping in discrete field geochemical data. These methods include analyses by sample catchment basins (SCB) (Bonham-Carter and Goodfellow, 1984;Bonham-Carter et al, 1987;Carranza and Hale, 1997;Carranza 2008Carranza , 2010aAbdolmaleki et al, 2014;Ghezelbash et al, 2019;Shahrestani et al, 2019;Najafian et al, 2020), stream orders (Carranza, 2004), extended sample catchment basins (ESCB) (Spadoni, 2006) and weighted drainage catchment basins (WDCB) (Yousefi et al, 2013;Farahbakhsh et al, 2019). In these methods, the value within each discrete field that is linked to each sample is the same, thus precluding 'mathematical interference' between neighboring samples (Lancianese and Dinelli, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Single‐element Anomaly Mapping from Stream Sediment Geochemical Landscapes Aided by Digital Terrain Analysis

Xiang

Xia

Xiao

et al. 2023

Acta Geologica Sinica (Eng)

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The identification of anomalies within stream sediment geochemical data is one of the fastest developing areas in mineral exploration. The various means used to achieve this objective make use of either continuous or discrete field models of stream sediment geochemical data. To map anomalies in a discrete field model of such data, two corrections are required: background correction and downstream dilution correction. Topography and geomorphology are important factors in variations of element content in stream sediments. However, few studies have considered, through the use of digital terrain analysis, the influence of geomorphic features in downstream dilution correction of stream sediment geochemical data. This study proposes and demonstrates an improvement to the traditional downstream dilution correction equation, based on the use of digital terrain analysis to map single‐element anomalies in stream sediment geochemical landscapes. Moreover, this study compares the results of analyses using discrete and continuous field models of stream sediment geochemical data from the Xincang area, Tibet. The efficiency of the proposed methodology was validated against known mineral occurrences. The results indicate that catchment‐based analysis outperforms interpolation‐based analysis of stream sediment geochemical data for anomaly mapping. Meanwhile, the proposed modified downstream dilution correction equation proved more effective than the original equation. However, further testing of this modified downstream dilution correction is needed in other areas, in order to investigate its efficiency further.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Single‐element Anomaly Mapping from Stream Sediment Geochemical Landscapes Aided by Digital Terrain Analysis

Xiang

Xia

Xiao

et al. 2023

Acta Geologica Sinica (Eng)

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“…Books of foreign scientists translated into Russian are very popular [31,32]. Their early publications on the study of stream sediments for the purpose of ore deposit prospecting can be referred to, for example, in [33][34][35][36][37][38][39][40][41][42] and, more recently, in [43][44][45][46][47][48][49][50][51][52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Lithochemical Stream Sediments of the Dukat Gold–Silver Ore-Forming System (North–East of Russia)

2019

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The composition, structure and formation features of the exogenous anomalous geochemical fields (AGFs) identified by lithochemical stream sediments (LSSs) are considered using the examples of the Dukat gold–silver ore-forming system and the deposit with the same name. The research was carried out in the Balygychan–Sugoy trough (Magadan region, north–east of Russia). Areal geochemical surveys on the 1:200,000 and 1:50,000 scales were conducted. Exogenous AGFs of basic element indicators of all known mineralization types were studied. It is shown that the surveys on the 1:200,000 scale are characterized by simplicity, relative depth and the possibility to obtain information operatively about the metallogeny of the area as a whole. At the same time, the anomalies were revealed as a result of surveys often making a relatively poor component composition and low contrast compared with ores. The violation of quantitative and sometimes qualitative relationships can be seen between elements, especially those related to gold–silver mineralization. In this situation, the most informative are surveys of LSSs on the 1:50,000 scale. The AGFs were revealed as a result of their performance to have a richer component composition and high contrast, conforming to different ore types. It is shown that, while prospecting for gold–silver mineralization with LSSs in cryolithogenesis zone conditions, the binding forms study of mineralization element indicators is effective. In watercourse heads, where alluvium is practically absent, mosses are proposed for sampling, as they hold the sandy silt material firmly. The obtained results are recommended for use at all stages of prospecting, not only in the north–east of Russia but also in other similar climatic regions.

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Occurrence, behaviour and environmental risk assessment of trace metals in stream sediments from southwestern Burkina Faso, West Africa

Sako

Nimi²,

Sawadogo

et al. 2021

Environ Monit Assess

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Comparison of efficiency of techniques for delineating uni-element anomalies from stream sediment geochemical landscapes

Cited by 13 publications

References 56 publications

Single‐element Anomaly Mapping from Stream Sediment Geochemical Landscapes Aided by Digital Terrain Analysis

Single‐element Anomaly Mapping from Stream Sediment Geochemical Landscapes Aided by Digital Terrain Analysis

Lithochemical Stream Sediments of the Dukat Gold–Silver Ore-Forming System (North–East of Russia)

Occurrence, behaviour and environmental risk assessment of trace metals in stream sediments from southwestern Burkina Faso, West Africa

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