彦陽 및 蔚山地域 화강암質巖類 의 巖石化學的 硏究

• 영문명: Petrochemistry of granitic rocks from the Eonyang and the Ulsan area
• 발행기관: 대한자원환경지질학회
• 저자명: Yoon Jong Lee(李倫鐘)
• 간행물 정보: 『자원환경지질』13권 2호, 69~79쪽, 전체 11쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1980.06.30

영문 초록

Granitic rocks, from the Eonyang and the northwestern part of Ulsan area, were mainly studied from the petrochemical point of view. From field work, microscopic observation and the result of K-Ar ages, these granitic rocks are divided into six rock types of a, b, c, d, e and e’, of which modal composition are given. Type a, c, e and e’ are mainly granodiorite, type b is adamellite, and type d is granodiorite, adamellite and others (porphyritic rock, porphyry and felsitic rocks). Bulk chemical analyses of 22 samples of the granitic rocks are given. The petrographical and petrochemical characteristics of these rocks are discussed briefly. In the petrochemical compositions with their characteristic variation trends of several oxides and norm Or-Ab-An triangular diagram, type a, b and c show some similarity to that of San-yo granite of Japan and younger granite of Ogcheon geosynclinal zone, and then, type e and e’, to San-in granite of Japan. But, some of granitic rock samples of type d are similar to San-yo granite and the others of type d to San-in granite because this type is composed of porphyritic rock, porphyry and felsitic rocks. According to the result of K-Ar ages (1976, Lee et al.) of rock samples from type a, b and care Cretaceous, on the otherwise, type d, e and e’, are Tertiary granitic rocks. Judging from these evidences, granitic rocks in the area are correlated to the Cretaceous and Tertiary granitic rocks in the, southwestern Japan, that is, type a, band c are correlated to San-yo granite, and type d, e and e’ to San-in granite.

목차

Abstract

1. 序論

2. 地質槪要

3. 花崗岩類

4. 花崗岩類의 鑛物容量比

5. 花崗岩類의 化學組成

6. 結論 및 考察

謝辭

參考文獻