Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Petrochemical Study on Igneous Rocks in the Hamyang area, Kyongnam, Korea

경남(慶南) 함양지역(咸陽地域)에 분포(分布)하는 화성암류(化成岩類)에 대(對)한 암석화학적(巖石化學的) 연구(硏究)

  • Park, Jay-Bong (Dept. of Geol., College of Natural Science, Chonnam national Univ.) ;
  • Kim, Yong-Jun (Dept. of Geol., College of Natural Science, Chonnam national Univ.) ;
  • Kim, Cheong-Bin (Dept. of Geol., College of Natural Science, Chonnam national Univ.)
  • 박재봉 (전남대학교 자연대학 지질학과) ;
  • 김용준 (전남대학교 자연대학 지질학과) ;
  • 김정빈 (전남대학교 자연대학 지질학과)
  • Published : 1990.02.28
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Abstract

Igneolls rocks of the Hamyang area consist of Hamyang foliated granites and hornblende diorite. Hamyang foliated granites are classified into four rock types in terms of mineral composition and texture. The four rock types are foliated hornblende biotite granodiorite, foliated porphrytic granodiorite, foliated fine biotite granodiorite and foliated leuco granite. Petrochemical data of these rocks suggest that Hamyang foliated granites is calc-alkali rock series of differentiated products of cogenetic magma by fractional crystallization. Igneous rocks of studied area correspond to I-type, peraluminous and calc alkali rock series. Rb-Sr age and $Sr^{87}/Sr^{86}$ initial ratio for foliated prophrytic granodiorite is $200{\pm}Ma$and $0.711{\pm}0.0037$, respectively. K-Ar(hornblende) age of hornblende diorite is $179{\pm}9Ma$. These data come to an coincidence with Igneous activity of South Korea which were proposed by O.J. Kim(1975), that is, they correspond to Hamyang foliated granites of products of Songrim Disturbance, and to hornblende diorite of Daebo Orogeny.

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