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이준동 한국지구과학회 1991 韓國地球科學會誌 Vol.12 No.3
Many granitic masses are distributed in southeastern part of Gyeongsang basin in Korean peninsula by plutonism. The granitoids in Gyeongsang basin can be classified ~s Cretaceous Chindong granitoid, upper Cretaceous Bulgugsa granitoid, and upper Cretaceous to early Tertiary Masanite. Chindong granitold consists of quartz diorite, tonalite, and granodiorite. Bulgugsa granitoid is classified as hornblendegranite, biotite,granite and porphyritic granite. Masaaite consists of hornblende granite type and biotite granite type in the studied area. Field occurrence never showy any clear relationship between Chindong granitoid and Masanite in Chindong area, but Masanite intuded into Bulgugsa granitoid in Masan area. Relationship between Chindong granitoid and Bulgugsa granitoid is ambiguous, but Chindong granitoid is thought to be early in view of the trend of chemical composition and higher content of hornblende in Chindong granitoid. Masanite is the latest intrusive granitoid in this area. The studied granitoids are discordant plutons intruding Cretaceous sediments, epizonal masses, and emplaced by stoping. Fractional crystallization of calr-alkalis magma, which is granodioritic or andesitic in composition and formed by melting of the subductyd Kula-Pacific crust under the continental crust along the boundary between compressional Eurasian plate and Kula-Pacific plate, yielded the granitic rock facies in the range of quartz diorite of Chindong granitoid to granite of Masanite.