Genesis of Carbonate Breccia Containing Invisible Gold in Taebaeksan Basin, South Korea
| Autor: | Sang-Gun No, Seung-han Lee, Bong-Chul Yoo, Maeng-Eon Park |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:QE351-399.2
0211 other engineering and technologies Geochemistry hydrothermal fluid 02 engineering and technology Yemi breccia invisible gold engineering.material 010502 geochemistry & geophysics 01 natural sciences chemistry.chemical_compound matrix materials Breccia 021108 energy isolated gold particles Chlorite 0105 earth and related environmental sciences Calcite Mineral lcsh:Mineralogy Geology Epidote Geotechnical Engineering and Engineering Geology pyrite chemistry karstification engineering Carbonate rock Carbonate Pyrite |
| Zdroj: | Minerals Volume 10 Issue 12 Minerals, Vol 10, Iss 1087, p 1087 (2020) |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min10121087 |
| Popis: | The Yemi breccia developed and is distributed within the Paleozoic carbonate rock (Maggol Formation) in the central part of the Taebaeksan Basin, South Korea. Explanation for the genesis of the Yemi breccia has been controversial. We investigated the petrological and mineralogical properties of the breccia and the matrix materials at 60 outcrops. The Yemi breccia is divided into crackle, mosaic, and chaotic breccias based on morphology. In addition, these are divided into blackish, reddish, grayish, and white to pinkish matrix breccias according to the materials of the matrix. Quartz, calcite, pyrite, hematite (after pyrite), and minor epidote, chlorite, and opaque materials mainly comprise the matrix materials. The pyrite grains from the Yemi breccia can be divided into two types based on the mineral texture: diagenetic and hydrothermal. We analyzed the chemistry of pyrite and hematite (after pyrite) from the Yemi breccia with an electron probe X-ray microanalyzer (EPMA). Invisible gold was detected within the pyrite grains by EPMA and disseminated micron-sized isolated gold particles were discovered by backscattered electron (BSE) images. The texture of Au-bearing pyrite and gold particles in the Yemi breccia is especially well matched with pyrite and gold from the Shuiyindong Carlin-type hydrothermal gold deposits, China. Therefore, we suggest an important role of hydrothermal fluid in karstification within the Paleozoic carbonate rock. |
| Databáze: | OpenAIRE |
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