대장광상(大藏鑛床)의 지화학(地化學) 및 생성환경(生成環境) 연구(硏究)

신홍자,김문영,소칠섭,Shin, Hong-Ja,Kim, Moon-Young,So, Chil-Sup 대한자원환경지질학회 1987 자원환경지질 Vol.20 No.1

The Daejang mine is one of the representatives of Cu-Pb-Zn-(Ag) vein deposit related genetically to late Cretaceous granitoid in Korea. Sericite from an alteration halo of the mine yielded a K-Ar date of $95{\pm}3.5Ma$. Based on macrostructures of vein filling, three major mineralization stages (I, II and III) are distinguished by tectonic breaks. Major ore constituents are arsenopyrite, pyrite, pyrrhotite, sphalerite, chalcopyrite, galena, boulangerite, with small amounts of Ag-bearing tetrahedrite, pyrargyrite, native bismuth, marcasite, siderite, ankerite, gudmundite and calcite. Characteristic feature of each mineralization stage and compositional variation of sphalerite and arsenopyrite are discussed in relation to the genetic environments. The FeS contents of sphalerites are 20.5~14.9 mole % in stage I, 17.9~11.9 mole % in stage IIA, 17.0~9.2 mole % in stage IIB, and 6.9~4.7 mole % in stage III. Their results are indicative of decreasing FeS contents during mineralization process in sphalerite coexisting with sulfur-rich sulfide assemblages, such as monoclinic pyrrhotite and pyrite, and is agreement with the conclusions shown by Scott and Kissin(1973). The composition of arsenopyrite decrease also in As content from stage I to stage III, and the compositional variation correlate with position of the associated minerals in the paragenesis. Temperature and pressure of the mineralization are determined as $250{\sim}430^{\circ}C$ and 4.0~0.3kb respectively, based on the chemistry of the minerals.

常隱鑛山의 Au-Ag 鑛脈의 鑛物 共生 및 化學組成

Moon Young Kim(金炆,榮),Hong Ja Shin(申虹子),Jong Hwan Kim(金鍾煥) 대한자원환경지질학회 1991 자원환경지질 Vol.24 No.4

The Sangeun ore deposit is located in a volcanic belt within the Gyeongsang Basin in south western Korea. The ore deposit is of representative epithermal Au-Ag quartz vein type developed in lapilli tuff. This paper presents the mineralization with special emphasis on mineral zoning of the deposits. Principal points are summarized as follows: (1) Four stages of mineralization are recognized based on macrostructures. From ealier to later they are stage Ⅰ(arsenopyrite-pyrite-quartz), stage Ⅱ(Au-Ag bearing Pb-Zn-quartz), stage Ⅲ(barren quartz), and stage Ⅳ(dickite-quartz). (2) Electrum principally occurs with arsenopyrite and galena in stage Ⅱ, and has chemical compositions of 72.9-67.1 Ag atom %, and has Ag/Au ratio of 2.69-2.04. (3) Sphalerite varies in its FeS content according to the mineralization stages; 22.03-18.60 mole % FeS and 1.33-0.23 mole % MnS in stage IB, 16.11-8.64 mole % FeS and 1.33-0.23 mole % MnS in stage Ⅱ. (4) Alteration zones of mineral assemblage, from the vein to the wall-rock, consist of sericite-quartz-pyrite, sericite-quartz-dickite, sericite-chlorite plagioclase respectively.

水熱 溫度差法에 의한 水晶의 育成

김문영(Moon Young Kim),장영남(Young Nam Jang),신홍자(Hong Ja Shin),배인국(In Kuk Bae) 대한자원환경지질학회 1991 자원환경지질 Vol.24 No.3

High quality quartz crystals are grown in 0.5N NaOH+LiOH solution on the seed crystal at 370-395℃ and 1200-1300 kg/㎠ condition. Growth rates are determined by the crystal thickness grown on the seed crystals with Z(0001) and X(1120) direction. Relatively high growth rate of Z(0001) direction gradually changes as the temperaure difference (ΔTi) between growth and dissolution zones from 25 to 10℃. The X axis direction is affeced by ΔTi, and +X(1120) direction shows a high growth rate than -X(1120) direction. According to the variation with kinds of solutions used, the crystal growth that in NaOH solution is found to be slower than that in Na₂CO₃ solution. However, for the case in the NaOH solution mixed with LiOH, it shows a favorable growth rate in terms of grown crystal quality.

統營鑛山産 閃亞鉛石의 化學組成

Moon Young Kim(金炆,榮),Hong Ja Shin(申虹子) 대한자원환경지질학회 1989 자원환경지질 Vol.22 No.2

The Tongyoung deposits are epithermal gold and silver bearing quartz-rhodochrosite vein type deposits of late Cretaceous. They occurs in the andesite and tuff breccia member called Gyeongsang basin. Four mineralizations can be distinguished at the mine based on macrostructures. From earlist stage to lastest stage they are: stage I, base-metal quartz vein; stage II, rhodochrosite vein (IIA) and Pb-Zn vein (IIB); stage III, barren quartz vein; stage IV, calcite-ankeritic rhodochrosite veins. Gold and silver mineralizations occur predominantly in the stage I and IIB. Electrum is closely associated with galena, sphalerite and pyrite, and has chemical compositions of 50.98-64.05 atom % Ag. Sphalerite contains 2.09-5.05 mol % FeS and 0.34-2.01 mol % MnS in the stage I, and 2.01-3.41 mol % FeS and 0.21-2.80 mol % MnS in the stage IIB. The FeS and MnS contents are in general correlated, and shows a characteristic zonal arrangement of electrum. It reveals rhat FeS contents of sphalerite which precipitated before electrum, gradually decreases in a grain during its deposition ranging from about 3.3 to 2 mol %. It may be considered from the above data that an increase of fs₂ caused by the oxidation of ore forming fluid is more important that the decrease of temperature.

천연산 자류철석의 (磁硫鐵石) 화학조성 및 열적성질

김문영,신홍자 ( Moon Young Kim,Hong Ja Shin ) 한국광물학회 1990 광물과 암석 (J.Miner.Soc.Korea) Vol.3 No.2

통영광산산(統營鑛山産) 섬아연석(閃亞鉛石)의 화학조성(化學組成)

김문영,신홍자,Kim, Moon Young,Shin, Hong Ja 대한자원환경지질학회 1989 자원환경지질 Vol.22 No.2

The Tongyoung deposits are epithermal gold and silver bearing quartz-rhodochrosite vein type deposits of late Cretaceous. They occurs in the andesite and tuff breccia member called Gyeongsang basin. Four mineralizations can be distinguished at the mine based on macrostructures. From earlist stage to lastest stage they are: stage I, base-metal quartz vein; stage II, rhodochrosite vein (IIA) and Pb-Zn vein (IIB); stage III, barren quartz vein; stage IV, calcite-ankeritic rhodochrosite veins. Gold and silver mineralizations occur predominantly in the stage I and IIB. Electrum is closely associated with galena, sphalerite and pyrite, and has chemical compositions of 50.98-64.05 atom % Ag. Sphalerite contains 2.09-5.05 mol % FeS and 0.34-2.01 mol % MnS in the stage I, and 2.01-3.41 mol % FeS and 0.21-2.80 mol % MnS in the stage IIB. The FeS and MnS contents are in general correlated, and shows a characteristic zonal arrangement of electrum. It reveals rhat FeS contents of sphalerite which precipitated before electrum, gradually decreases in a grain during its deposition ranging from about 3.3 to 2 mol %. It may be considered from the above data that an increase of $fs_2$ caused by the oxidation of ore forming fluid is more important that the decrease of temperature.

상은광산(常隱鑛山)의 Au-Ag 광맥(鑛脈)의 광물(鑛物) 공생(共生) 및 화학조성(化學組成)

김문영,신홍자,김종환,Kim, Moon Young,Shin, Hong Ja,Kim, Jong Hwan 대한자원환경지질학회 1991 자원환경지질 Vol.24 No.4

The Sangeun ore deposit is located in a volcanic belt within the Gyeongsang Basin in south western Korea. The ore deposit is of representative epithermal Au-Ag quartz vein type developed in lapilli tuff. This paper presents the mineralization with special emphasis on mineral zoning of the deposits. Principal points are summarized as follows: (1) Four stages of mineralization are recognized based on macrostructures. From ealier to later they are stage I(arsenopyrite-pyrite-quartz), stage II(Au-Ag bearing Pb-Zn-quartz), stage III(barren quartz), and stage IV(dickite-quartz). (2) Electrum principally occurs with arsenopyrite and galena in stage II, and has chemical compositions of 72.9-67.1 Ag atom %, and has Ag/Au ratio of 2.69-2.04. (3) Sphalerite varies in its FeS content according to the mineralization stages; 22.03-18.60 mole % FeS and 1.33-0.23 mole % MnS in stage IB, 16.11-8.64 mole % FeS and 1.33-0.23 mole % MnS in stage II. (4) Alteration zones of mineral assemblage, from the vein to the wall-rock, consist of sericite - quartz - pyrite, sericite - quartz - dickite, sericite - chlorite plagioclase respectively.

大藏鑛床의 地化學 및 生成環境 硏究

Hong Ja Shin(申虹子),Moon Young Kim(金炆榮),Chil Sup So(蘇七燮) 대한자원환경지질학회 1987 자원환경지질 Vol.20 No.1

The Daejang mine is one of the representatives of Cu-Pb-Zn-(Ag) vein deposit related genetically to late Cretaceous granitoid in Korea. Sericite from an alteration halo of the mine yielded a K-Ar date of 95±3.5Ma. Based on macrostructures of vein filling, three major mineralization stages(Ⅰ, Ⅱ and Ⅲ) are distinguished by tectonic breaks. Major ore constituents are arsenopyrite, pyrite, pyrrhotite, sphalerite, chalcopyrite, galena, boulangerite, with small amounts of Ag-bearing tetrahedrite, pyrargyrite, native bismuth, marcasite, siderite, ankerite, gudmundite and calcite. Characteristic feature of each mineralization stage and compositional variation of sphalerite and arsenopyrite are discussed in relation to the genetic environments. The FeS contents of sphalerites are 20.5~14.9 mole % in stage Ⅰ, 17.9~11.9 mole % in stage ⅡA, 17.0~9.2 mole % in stage ⅡB, and 6.9~4.7 mole % in stage Ⅲ. Their results are indicative of decreasing FeS contents during mineralization process in sphalerite coexisting with sulfur-rich sulfide assemblages, such as monoclinic pyrrhotite and pyrite, and is agreement with the conclusions shown by Scott and Kissin(1973). The composition of arsenopyrite decrease also in As content from stage Ⅰ to stage Ⅲ, and the compositional variation correlate with position of the associated minerals in the paragenesis. Temperature and pressure of the mineralization are determined as 250~430℃ and 4.0~0.3kb respectively, based on the chemistry of the minerals.