Statistical Characterization of Groundwater Geochemistry in Vein-Type Gold Mines in Korea

Jong-Un Lee

doi:10.32390/ksmer.2022.59.4.321

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2022 Vol.59, Issue 4 Next Page

Research Paper

Statistical Characterization of Groundwater Geochemistry in Vein-Type Gold Mines in Korea 국내 맥상 금광산 내 지하수 지구화학의 통계학적 특징

31 August 2022. pp. 321-332

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Abstract

A dataset of chemical composition of groundwater in Korea including that in vein-type gold mines was compiled through literature review. Groundwaters were grouped, according to location, into ‘adit groundwater’ in the immediate vicinity of gold veins, ‘surrounding groundwater’ spatially separated from the veins in gold mines, ‘normal groundwater’ from non-mineralized granitic rocks, and ‘deep groundwater’ from a depth of 500 m or deeper. ANOVA indicated that adit groundwater showed statistically higher values of TDS, Ca, and SO₄ than the other groups. High SO₄ in the adit groundwater is likely due to sulfide minerals, and high Ca may be attributed to the occurrence of calcite as a fracture-filling mineral in the mines. Classification functions derived from discriminant analysis could distinguish between adit, surrounding, and normal groundwaters with a hit ratio > 92%. The classification functions may serve as an indicator for the exploration of unknown vein-type gold deposits through chemical analysis of the groundwater.

Keywords

Vein-type gold mines

groundwater

geochemistry

ANOVA

discriminant analysis

맥상 금광상 주변 지하수 등 다양한 지하수의 화학분석 결과를 국내 문헌들로부터 수집하였다. 각 시료를 채취 위치에 따라 금맥 주변의 ‘갱내수’, 광산 지역에 존재하나 금맥과 공간적으로 이격되어 있는 ‘주변수’, 비광화 화강암질암 지역의 ‘일반지하수’, 500 m 이하 심도의 ‘심부지하수’로 구분한 후, 화학분석 결과를 이용하여 일원분산분석, 군집분석, 판별분석을 수행하였다. ANOVA 분석 결과, 갱내수는 다른 그룹의 지하수에 비해 TDS, Ca, SO₄ 함량이 통계적으로 유의하게 높은 것으로 나타났다. 갱내수의 높은 SO₄ 함량은 금과 동반되어 산출되는 다양한 황화광물의 존재에 의해, Ca 함량은 광산 내 열극충진광물로 공통적으로 관찰되는 방해석에 기인한 것으로 보인다. 판별분석 결과 도출된 분류함수는 92% 이상의 적중률로 갱내수, 주변수, 일반지하수를 판별할 수 있었다. 통계학적 접근을 통해 도출된 이러한 분류함수는 지하수 화학분석을 통해 미지의 맥상 금광상을 탐사하는데 지표가 될 수 있을 것이다.

키워드

맥상 금광산

지하수

지구화학

일원분산분석

판별분석

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Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 59
No :4
Pages :321-332
Received Date : 2022-06-22
Revised Date : 2022-07-16
Accepted Date : 2022-08-29
DOI :https://doi.org/10.32390/ksmer.2022.59.4.321

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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