巨道鑛山 Fe-Cu 및 Au-Bi-Cu 鑛床에 對한 鑛物學的 및 成因的 硏究

• 영문명: Mineralogy and genesis of Fe-Cu and Au-Bi-Cu deposits in the Geodo mine, Korea
• 발행기관: 대한자원환경지질학회
• 저자명: Jai Dong Ko(高在東) Soo Jin Kim(金洙鎭)
• 간행물 정보: 『자원환경지질』15권 4호, 189~204쪽, 전체 16쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1982.12.30

영문 초록

The Geodo mine is located in the southern limb of the Hambaeg syncline. Geology of the area consists of Paleozoic-Mesozoic sedimentary Rocks and Cretaceous igneous rocks. The important igneous rocks presumably related to skarnization and ore mineralization in the area, are the early granodiorite and the late porphyritic granodiorite. Two mineralogical types of ore deposits are recognized in the area. They are the Fe-Cu deposits in the Myobong formation and the Au-Bi-Cu deposits in the Hwajeol formation. Contact metamorphism due to granodiorite intrusion includes hornfelsization, exoskarnization and endoskarnization. Wall-rock alterations related to the Fe mineralization are grouped into the hydrothermal replacement skarnization and the hydrothermal filling skarnization. Another hydrothermal alteration is associated with the Cu mineralization. Various mineralogical analyses have been applied for the identification of minerals. They include optical microscopy, chemical analysis, etching test, X-ray diffraction, and infrared absorption spectroscopic analyses. The ore minerals in these ore deposits are classified into two groups ; hypogene and supergene minerals. Hypogene minerals consist of magnetite, pyrite, chalcopyrite, and chalcocite. Supergene minerals consist of chalcocite, bornite, and geothite. Ore minerals show various kinds of ore texture: open-space filling, exsolution, replacement, and cementation texture. The gangue minerals consist of quartz, diopside, epidote, garnet and plagioclase in the hornfelsic zone, garnet, diopside, scapolite, actinolite, sericite, chlorite, quartz, and calcite in the skarn zone, and, epidote, chlorite, sericite, quartz, and calcite in the late hydrothermal alteration zone. This study shows that the Fe-Cu deposits are of metasomatic pipe type with the later hydrothermal fillings, and the Au-Bi-Cu deposits are of hydrothermal fissure-filling type. The mineralization is probably related to the intrusion of porphyritic granite.

목차

Abstract

1. 서언

2. 연구방법

3. 지질 개요

4. 접촉 변성대

5. 광상개요

6. 산출광물

7. 광물학적 특성

8. 광석의 구조 및 조직

9. 광물의 생성

10. 광상의 형성

11. 결론

참고문헌