Informatics Publishing Limited

Yang Wu ¹, Mao Kainan ¹

Affiliations
1 Resources and Environment Engineering Institute, Guizhou Institute of Technology, Guizhou, Guiyang, CN

Abstract

The distribution of skarn type gold deposit, ore-controlling tectonic setting, ore deposit classification, mineralization alteration zoning and some research methods of ore deposit geochemical are reviewed. Most of skarn type gold deposits located in the Pacific rim, The main ore-controlling tectonic setting are high Angle convergent subduction plate on island arc orogenic belt and craton activation area associated with deep fracture zone. As a major magmatic hydrothermal deposit, Skarn type gold deposits, have the typical phenomenon of ore deposit scale mineralized alteration zoning and the band structure of a single mineral scale. The former has the important instruction significance to guide the prospecting exploration and the latter, which is to understand the evolution of ore-forming fluid and deposit genesis, has great significance. Now, the research for the geochemical characteristic of skarn type deposit gold deposit focuses on mineral phase equilibrium, fluid inclusions, stable isotope and trace element research. The purpose of this paper is to through the analysis of these developments, sets up a study framework of skarn type gold ore deposit.

Keywords

Skarn Type Gold Deposits, Metallogenic Tectonic Background, Deposit Classification, Mineralized Alteration Zonation, Geochemistry.

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Qiu Luo ¹, Dai Tagen ¹, Yang Wu ¹

Affiliations
1 School of Geosciences and Info-Physics, Central South University, Hunan Changsha, CN

Abstract

Soil samples were collected from commercial, residential, agricultural and industrial zones in Zhuzhou city, Hunan Province. The concentrations of heavy metals in soils were determined using plasma emission spectrometer and double channel atomic fluorescence spectrometer. And the distribution characteristics of heavy metals in soils were studied in different functional zones. Based on the soil background values, the soil environmental quality and ecological risk were assessed using the single factor index evaluation method, pollution comprehensive index method and inside plum index evaluation method. The results show that the concentrations of heavy metals in soils of Zhuzhou increased with time, which was consistent with the characteristics of industrial and agricultural production in Zhuzhou. It was obvious that the concentrations of heavy metals differed in different functional zones. The concentration of industrial zone was the highest, while agricultural zone was the lowest. Industrial zone was polluted seriously, where As, Cd, Cu, Hg, Zn all exceed the National Soil Environmental Quality Standard. Commercial and residential zones were polluted moderately, where Cd also exceed standard. In the same place of Zhuzhou, the concentration of heavy metals in the upper soil is higher than that in the subsoil. It can be concluded that human activities, especially industrial production are the main reasons for the enrichment of heavy metal elements, thus should strengthen scientific control and governance.

Keywords

Soil Heavy Metals, Pollution, Distribution Characteristic, Different Functional Zones, Zhuzhou.

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Yang Wu ¹, Dai Tagen ¹, Zhang Menglong ¹

Affiliations
1 School of Geosciences and Info-Physics, Central South University, Hunan Changsha, CN

Abstract

Based on the detailed field work, geochronology, geochemistry and oxygen fugacity characteristics, accompanied with tracing the regional faults and their framework, this article makes an attempt to identify and reveal the evolution trend, material source and geological background of igneous rocks; analyze magmatic oxygen fugacity characteristics of the Yanshanian igneous rocks;discusses the characteristics of magma oxygen fugacity. This paper provides evidence for ascertaining the genetic relationship between magmatic rocks and tectonic setting of the study area; The content of trace elements in zircon showed that igneous rocks formed early generally have higher Ce⁴⁺/Ce³⁺ value, high oxygen fugacity; whereas igneous rocks formed later generally have lower Ce⁴⁺/Ce³⁺ value, indicating the magma with low oxygen fugacity.

Keywords

Oxygen Fugacity, Tectonic Evolution, Xintianling.

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Yang Wu ¹, Zhang Min ¹, Mao Kainan ¹

Affiliations
1 School of Resources and Environmental Engineering, Guizhou Institute of Technology, CN

Abstract

The Ereen deposit lies within the North Khentei gold belt which is bounded by the north-west by the Bayangol fault system and by the south-east by the Yeroogol (or Sujigtei) fault system. Both fault systems have a similar south-west-north-east trend (generally NE45°). Faults are of east-west, north-south and north-western direction. Regional scale is north-easterly trending. Sujigtei fault controls position of the large-scale Gatsuurt gold deposit. Ereen occurs inside regional magnetic anomaly. The average size of visible Au is reported to be 1mm. Results of combined IP (induced polarization), magnetic surveys and gold in soil anomalies and l48 diamond drillholes in the Ereen area show an anomaly to the south-east of the drilled area and remains to be tested as it did a similar anomaly on the Baavgait license. Ereen gold deposit shows the potential at depth of mineralization using the elevation of Gatsuurt as a guide to possible depth extent of mineralization.

Keywords

Ereen Deposit, Induced Polarization, Gold, Prospecting.

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Yang Wu ¹, Zhang Min ¹, Mao Kainan ¹

Affiliations
1 School of Resources and Environmental Engineering, Guizhou Institute of Technology, China. 1st Caiguan Road, Yunyan District, Guiyang City, Guizhou, CN

Abstract

The Ereen deposit lies within the North Khentei gold belt, which is bounded by the north-west by the Bayangol fault system and to the south-east by the Yeroogol (or Sujigtei) fault system. The preliminary exploration has just been conducted at the deposit, where the resource estimation achieved indicates a possible médium-scale mine, cut-off grade has not been finalized and therefore the mining boundary cannot be defined. The cut-off grade will be achieved by thorough economic and technical study. The findings from the site visit and the current exploration are favourable for open pit mining; however, the parameters for the pit development will need to be included in the project feasibility study and mine design in the future. The current engineering geology and hydrogeology study are still very basic and cannot satisfy the mine design requirements in the future. For the future mining operation, the company needs to engage in a contract with the local electricity supply. The site visit found that water supply seems sufficient.

Keywords

Ereen Deposit, Mining Assessment, Gold, Prospecting.

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Zhang Min ¹, Yang Wu ¹, Mao Kainan ¹

Affiliations
1 School of Resources and Environmental engineering ,Guizhou Institute of Technology, China, 1st Caiguan Road, Yunyan District, Guiyang City, Guizhou, CN

Abstract

Using plasma emission spectrometer and atom atomic fluorescence spectrometry analysis and the heavy metals of the soil samples, which are scientifically collected in business zone, living zone, agricultural zone and industrial zone of Ereen. The results show that different functional zones of Ereen present different distribution characteristics of heavy metals in soil, As, Cd, Cu, Hg , Zn of industrial zone and Cd in business zone, living zone and agricultural zone are all exceed the national soil environmental quality standards. The content of heavy metals in upper soil is higher than in the subsoil in the study area, which shows that artificial external pollution input potential influence on the soil of Ereen. Agricultural zone of Ereen is less pollution, industrial zone is polluted seriously, commercial and residential both achieve the moderate pollution, thus should strengthen scientific control and governance.

Keywords

Ereen, Different Functional Zones, Heavy Metals, Distribution Characteristics.

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Yang Wu ¹, Zhang Min ¹, Mao Kainan ¹

Affiliations
1 School of Resources and Environmental Engineering, Guizhou Institute of Technology, China. 1st Caiguan Road, Yunyan District, Guiyang City, Guizhou, CN

Abstract

The Ereen deposit lies within the North Khentei gold belt, which is bounded to the north-west by the Bayangol fault system and to the south-east by the Yeroogol (or Sujigtei) fault system. Both fault systems have a similar south-west-north-east trend (generally NE45°) faults of east-west, north-south and north-western direction; regional scale north-easterly trending Sujigtei fault controls position of the large-scale Gatsuurt gold deposit. The gold mineralization in Ereen deposit is confined spatially with hydrothermal alteration of rhyolite, Ereen deposit area was affected by three tectonic and consecutively, three hydrothermal alteration cycles.The Ereen southern mineralized zone is characterized by extensive quartz veining and a series of ore bodies with similar east-north-easterly striking and south-east dip direction, but the northern zone is different.

Keywords

Ereen Deposit, Alteration, Weathering, Gold.

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Yang Wu ¹, Zhang Min ¹, Mao Kainan ¹

Affiliations
1 School of Resources and Environmental Engineering, Guizhou Institute of Technology, China. 1st Caiguan Road, Yunyan District, Guiyang City, Guizhou province, CN

Abstract

The Mineral Mathematical Model Software and Micromine Software from abroad for digitization analysis were used to study some of the mines in Ereen gold mine in Mandal Soum, Selenge province, Mongolia. This study dealt with: primitive database construction, sample statistical analysis, lithology modelling, variation function, grade modelling, etc. Finally,a three-dimensional space model of ore bodies was established, on the basis of this mineral mathematical model.These results of digitization research enormously make the mine production management become more convenient, and have provided the scientific basis for mine prospecting project design, mining engineering design and economic evaluation.

Keywords

Ereen Deposit, Digitization, Three-dimensional Model.

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Zhang Min ¹, Yang Wu ¹, Mao Kainan ¹

Affiliations
1 School of Resources and Environmental Engineering, Guizhou Institute of Technology, China, 1st Caiguan Road, Yunyan District, Guiyang City, Guizhou province, CN

Abstract

The objective of this environmental due diligence review is to identify and or verify the existing and potential environmental liabilities and risks, and assess any associated proposed remediation measures for the Ereen gold mine. The results show that area of soil and water conservation measure was produced prior to 5 measures mentioned above, belong to a positive design process, closing hillside of which has been decided lately, other 4 measures were produced between these two factors. The four measures were not been decided simultaneously, have the trend of building soil and water conservation forest and building economic forest prior to terracing and conservation tillage, but they are independent to each other, belong to parallel coupled design. Conservation tillage, terracing, building economic forest, building soil and water conservation forest account for 31%,12%,21%,24% of area of soil and water conservation measure, which has some change extent.

Keywords

Ereen Deposit, Digitization, Three-Dimensional Model.

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Yang Wu ¹, Zhang Min ¹, Mao Kainan ¹

Affiliations
1 School of Resources and Environmental Engineering, Guizhou Institute of Technology, China. 1st Caiguan Road, Yunyan District, Guiyang City, Guizhou province, CN

Abstract

The Ereen deposit lies within the North Khentei gold belt. The exploration works undertaken at Ereen have shown significant mineralization in and around the existing known vein gold mineralization. Work to date has delineated a mesothermal quartz vein system with volcanic-hosted disseminated mineralization associated with quartz-sericite carbonate and intensive silicification alteration zones. The area has approximate dimensions of 750 650m and assay results indicate gold mineralization averaging 1.7g/t. Geophysical and geochemical data appear coincident, though drilling has shown that it is the gradient areas of the IP anomalies which appear most prospective. This has meant that some early holes did not intersect mineralization, but the more recent holes have been better targeted.

Keywords

Ereen Deposit, Prospecting Prediction, Gold, Drillings.

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