동원광산의 금-은 광화작용

• 영문명: Gold and silver mineralization in the Dongweon mine
• 발행기관: 대한자원환경지질학회
• 저자명: Hee In Park(朴喜寅) Young Rok Park(朴泳祿)
• 간행물 정보: 『자원환경지질』23권 2호, 183~199쪽, 전체 17쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1990.04.30

영문 초록

Ore deposits of Dongwon mine are composed of numerous gold and silver veins emplaced in sedimentary rocks of Cambrian Choseon Supergroup and granitoids of Cretaceous age. Ore veins of the mine can be divided into gold and silver veins on the base of vein structure, mineral assemblage and vein trends Mutual relationships between gold and silver veins are uncertain. Gold veins are simple veins which are composed of base-metal sulfides, and electrum with quartz and ankerite. On the other hand silver veins are complex veins which reveal three distinct stages of mineral deposition based on vein structure ; stage Ⅰ, deposition of small amounts of oxides and pyrite with quartz; stage Ⅱ, deposition of base-metal sulfides small amounts of Ag-bearing minerals, calcite and quartz; stage Ⅲ, deposition of base metal sulfides, electrum, Ag-sulfosalts, native silver, carbonates and quartz. Homogenization temperature and salinity of fluid inclusion from quartz of gold vein are as follows ; 229° to 283℃, 4.7 to 6.4 wt.% equivalent NaCl. The ore mineralogy suggests that temperature(T) and sulfur fugacity(fs₂) of the formation of the gold vein and stage Ⅲ of silver vein are estimated as T ; 294° to 318℃, fs₂ 10-9.4 to 10-10.1 atm. and T ; 240° to 279℃, fs₂ ; 10-11.1 to 10-17.3 atm. respectively. pressure condition during gold vein formation estimated from data of ore mineralogy and fluid inclusion range 500 to 750 bar.

목차

Abstract

序言

一般地質

花崗岩類

鑛床

鑛石

流體包有物

考察

結言

參考文獻