Chromium (Cr) geochemical mapping based on fixed-values' method: Case studies in China

An, Yong-long; Yan, Taotao; Gong, Qingjie; Wang, Xueqiu; Huang, Yong; Zhang, Bimin; Yin, Zhiqiang; Zhao, Xia; Liu, Ningqiang

doi:10.1016/j.apgeochem.2021.105168

Cited by 7 publications

(9 citation statements)

References 33 publications

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Section: Geochemical Map Of LI On Fixed-value Methodsmentioning

confidence: 99%

“…To contour the geochemical map objectively, An et al [20] and Xu et al [21] proposed the fixed-value method for Cr and Sn, respectively. According to the construction of the fixed-value method [20,21], a fixed-value method on Li is proposed here on 19 levels according to the method presented by Xu et al [21] and listed in Table 2 along with the values of the fixed-value method on Sn. In the fixed-value method on Li, to contour the geochemical map, Li concentrations are divided into 19 levels on 18 fixed values which range from 5 µg/g (corresponding to the detection limit) to 1858 µg/g (corresponding to the cut-off grade of Li deposit in hard-rock type).…”

Section: Geochemical Map Of LI On Fixed-value Methodsmentioning

confidence: 99%

“…Geochemical maps and geochemical anomaly maps drawn from these data have been basic maps in the geochemical exploration of mineral resources and basic geological surveys [16][17][18][19]. With respect to the geochemical map, a new mapping technique called the fixed-value method was presented and illustrated on Cr and Sn, which can overcome the flaw of dependence on the amount of data [20,21]. The fixed values fully consider the current domestic and international classification, or statistical parameters of element concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Regional Geochemical Characteristics of Lithium in the Mufushan Area, South China

Li,

Gong,

Chen

et al. 2024

Applied Sciences

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With the explosive growth in demand for lithium (Li) resources, the Mufushan area has been a hotspot for Li deposit exploration in China in recent years. Geochemical maps and geochemical anomaly maps are basic maps in the geochemical exploration of mineral resources. A fixed-value method to contour a Li geochemical map is presented here, in which Li concentrations are divided into 19 levels on 18 fixed values, ranging from 5 μg/g (corresponding to the detection limit) to 1858 μg/g (corresponding to the cut-off grade of Li deposit in hard-rock type) and illustrated in six color tones corresponding to Li areas of low background, high background, low anomaly, high anomaly, mineralization in clay-type, and mineralization in hard-rock type. The geochemical map of Li in the Mufushan area using the new fixed-value method indicates that the study area belongs to the high background area, and the known Li deposits are located in the high anomaly areas. In addition, the geochemical anomaly map of the Mufushan area is drawn using the method of seven levels of classification, and indicates that the known Li deposits are all in the anomaly areas, with anomaly levels not lower than the second level. Furthermore, four other areas are recognized for Li resource potential based on the geochemical map and geochemical anomaly map in the Mufushan area.

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Section: Geochemical Map Of LI On Fixed-value Methodsmentioning

confidence: 99%

Section: Geochemical Map Of LI On Fixed-value Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Regional Geochemical Characteristics of Lithium in the Mufushan Area, South China

Li,

Gong,

Chen

et al. 2024

Applied Sciences

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“…However, with the increasing scope of the study area and cumulative data, the limitations of traditional methods, which depend on the amount of data, are exposed. To overcome these flaws in traditional methods, An et al [14] proposed a fixed-value method to contour the geochemical map of Cr.…”

Section: Introductionmentioning

confidence: 99%

“…In the fixed-value method for the Cr geochemical map [14], Cr concentrations were divided into 26 levels on 25 fixed values ranging from 5 µg/g (corresponding to the detection limit) to 171,000 µg/g (corresponding to the cutoff grade of 25% for Cr 2 O 3 in ores). The 26 levels were mapped in six color tones.…”

Section: Introductionmentioning

confidence: 99%

Tin (Sn) Geochemical Mapping Based on a Fixed-Value Method: A Case Illustration in Gejiu Area, Southwest China

Xu,

Li,

Zhang

et al. 2024

Applied Sciences

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Geochemical maps play an important role in mineral resource exploration. There are three traditional methods for creating geochemical maps: the cumulative frequency method, the logarithmic interval method, and the Avg±k∗Std (where Avg and Std are the abbreviations of average and standard deviation, and k is a multiple of Std) method. However, with the increasing scope of the study area and cumulative data, the limitations of traditional methods, which depend on the amount of data, are exposed. A fixed-value method for Sn geological mapping is proposed to overcome the limitations of traditional methods. In the fixed-value method, Sn concentrations are divided into 19 levels on 18 fixed values ranging from 1 μg/g (corresponding to the detection limit) to 1000 μg/g (corresponding to the cut-off grade of Sn in hard rocks). The 19 levels are mapped in six color tones. The first to fifth levels are the lowest background areas in blue tones, which correspond to Sn concentrations ranging from the minimum to 3.4 μg/g. The sixth to ninth levels are high background areas in yellow tones corresponding to concentrations less than 10 μg/g, the 10th to 12th are low anomaly areas in pink tones less than 28 μg/g, the 13th to 15th are high anomaly areas in red tones less than 200 μg/g (corresponding to the placer cut-off grade), the 16th to 18th in gray tones less than 1000 μg/g, and the 19th level is in black corresponding to Sn ores with Sn concentration not less than 1000 μg/g. The fixed-value method along with three traditional methods was used to contour the Sn geochemical maps in the Gejiu area in Southwest China. The illustration results of the presented fixed-value method and three traditional methods for geochemical mapping of Sn are all feasible for Sn deposit exploration in the Gejiu area, Southwest China. Compared to traditional methods, the presented fixed-value method overcomes the flaws of traditional methods and is also more meaningful in geochemistry.

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Concentrations and spatial distribution of chlorine in the pedosphere in China: Based on the China Geochemical Baselines Project

Wang¹,

Wang²,

Zhang³

et al. 2022

Journal of Geochemical Exploration

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Chromium (Cr) geochemical mapping based on fixed-values' method: Case studies in China

Cited by 7 publications

References 33 publications

Regional Geochemical Characteristics of Lithium in the Mufushan Area, South China

Regional Geochemical Characteristics of Lithium in the Mufushan Area, South China

Tin (Sn) Geochemical Mapping Based on a Fixed-Value Method: A Case Illustration in Gejiu Area, Southwest China

Concentrations and spatial distribution of chlorine in the pedosphere in China: Based on the China Geochemical Baselines Project

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