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전남 노화도에 분포하는 백악기 안산암질암의 암석 지구화학적 연구

Lithogeochemistry of Cretaceous Andesitic Rocks from the Nohwado, Chonnam

김석우|윤정한
한국자원공학회 (The Korean Society of Mineral and Energy Resources Engineers)|2004.12|한국자원공학회지 (Journal of the Korean Society of Mineral and Energy Resources Engineers)|제41권 제6호|pp. 466-475

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키워드

hydrothermal alteration화학성분안산암질암chemical compositions열수변질산소 및 수소 동위원소금 함량andesitic rocksoxygen and hydrogen isotopesgold contents.
주제분류자원공학

초록

연구지역의 지질은 백악기 안산암질암, 유문암질암, 세립질 흑운모 화강질암 및 충적층으로 구성되어 있다. 본 연구 대상인 안산암질암은 연구지역의 서편에 광범위하게 분포되어 있고, 지표 및 갱내에서는 유문암질암을 관입한 암맥상태로 산출된다. 화학성분 및 산소동위원소에 의하면 안산암질암은 현무암에서 데사이트질암으로 구분되고 비알칼리암의 칼크 알칼리암 및 I-type 계열에 도시된다. SiO2, Na2O 및 K2O 등의 화학성분, 산소 ( 18O: +1. ~ +4.1 ) 및 수소동위원소 ( D: -88.9∼-101.1 ) 그리고 금 함량변화 (4ppb∼24ppb)에 의하면 안산암질암은 약한 열수변질을 받은것으로 사료된다. 이상의 결과는 경상 분지에서 산출되는 안산암질암과 유사한 분화 및 산출 경향을 나타낸다. 안산암질암의 금 함량은 4ppb에서 24ppb (평균: 8.7ppb)로 SiO2함량 (55.9∼69.5%)이 높을수록 금 함량도 증가하는 경향을 보여주며 Au함량은 S, Sb, Pb 및 Se함량과 정의 상관관계를 나타낸다.

Abstract

The geology of the study area consists of Cretaceous andesitic and rhyolitic rocks, fine grained biotite granite and alluvium. The andesitic rocks are broadly distributed in the western side of the study area, and often occur as dykes in the surface and underground. The andesitic rocks are plotted in the field of basalt to dacite, calc-alkaline and I-type series based on the chemical compositions and oxygen isotopic compositions of the andesitic rocks. Andesitc rocks were suffered a weak hydrothermal alteration on the basis of chemical compositions such as SiO2, Na2O and K2O contents, gold content variation (4ppb∼24ppb), and oxygen isotopes( 18O: +1.3 to +4.1 ) and hydrogen isotopes ( D: -88.9 to -101.1 ). These results show a similar trend in the differentiation and occurrence of the Gyeongsang basin andesitic rocks. Gold contents of the andesitic rocks range from 4ppb to 24ppb (av.: 8.7 ppb), and they show a tendency to increase as SiO2 contents (55.9 to 69.5%) increase. Gold contents have positive correlations with S, Sb, Pb and Se contents.

참고문헌 (26)

  1. "Rare earth element mobility during granite alteration evidence from southwest England", 49, pp.149~165 (1980)
  2. "Nature and origin of A-type granites with particular reference to south-western Australia . Contribution to Mineralogy and Petrology", 80 (1982)
  3. "A guide to the chemical classification of the common volcanic rocks . Canadian Journal of Earth Science", 8, pp.523~548 (1971)
  4. "Report on pyrophyllite deposits. Geological Survey of Korea. Geology and Ore Deposits. Vol. 11", pp.163~169 (1969)
  5. "Oxygen isotopic compositions of Mesozoic granitic rocks in south Korea", 42, pp.311~322 (1992)
  6. "Petrochemical studies of the Cretaceous volcanic rocks from the Kyeongsang sedimentary basin . Jour. Geol. Soc. Korea. Vol. 29", pp.84~96 (1993)
  7. "Geochemical study of hydrothermal alteration zone and gold abundance of the Nowhado pyrophyllite deposit", pp.56~ (2004)
  8. "A chemical classification of volcanic rocks based on the total alkali-silica diagram Journal of Petrology", 27, pp.745~750 (1986)
  9. "Tectonic discrimination of granitoids . Geological society of America Bulletin", 101, pp.635~643 (1989)
  10. "A simple classification of volcanic rocks . Bulletin of Volcanology", 36. pp. 382-397. (1972)
  11. "Vocanic rock series in island arcs and active continental margins . American Journal of Science", 274, pp.321~355 (1974)
  12. "K-Ar age of alunite and sericite in altered rocks and volcanic rocks around the Haenam area", 23, pp.135~141 (1990)
  13. "Gold content of eastern Manus Basin Volcanic Rocks; Implications for enrichment in associated hydrothermal precipitates", 96, pp.91~107 (2001)
  14. "the characteristic mineral of felsic spillites . Contributions to Mineralogy and Petrology.", 75, pp.15~19 (1980)
  15. "a minor element discriminant for basaltic rocks of ocean enviroments and its implications for petrogenesis . Earth planet. Sci. Lett. Vol. 62", m(, pp.tio2 (1983), p2o5)[DOI]
  16. "Geology and alteration zoning of the Nohwa prophyllite deposit, southwest Korea(1) - On the No.1 deposit of the Nohwa mine", 49, pp.165~173 (1999)
  17. "1993. Geochemical dispersion of elements in volcanic wallrocks of pyrophyllite deposits in Milyang Area.", pp.337~347
  18. "Oxygen and hydrogen isotope compositions as indicators of granite gneiss in the New England Batholith Australia . Contribution to Mineralogy and Petrology", 62, pp.313~328 (1977)
  19. "Rb-Sr isochron ages, Sr and Nd isotopic compositions of granophyre in the Haenam-Wando areas", 29(2), pp.151~158
  20. "A geochemical study on the alunite zone of the Nohwa pyrophyllite deposits . Jour. Korean Inst. Mining Geol.", 25, pp.373~378 (1992)
  21. "The application of Oxygen and hydrogen isotope studies to problems of hydrothermal alteration and ore deposition . Econ. Geol.", 69, pp.843~883 (1974)
  22. "Gold content in the basalt of the Jeju Island", pp.129~140 (1997)
  23. "Gold abundance in Acid-sulfate alteration zone of the Nohwa pyrophyllite deposits in the Wando, Korea", 40(2), pp.110~118 (2003)
  24. "Gold content of volcanic rocks distributed in Korea .", 1, pp.106~109 (1997)
  25. "Distribution charateristics of gold in the volcanic rocks", 29, pp.257~267 (1996)
  26. "Gold content of Jurassic and Cretaceous granitic rocks in Korea . Mining Geol.", 41, pp.151~158 (1991)

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