南韓의 新期花崗巖類의 貫入時期와 地殼變動

• 영문명: Study on the intrusion epochs of younger granites and their bearing to orogenies in South Korea
• 발행기관: 대한자원환경지질학회
• 저자명: Ok Joon Kim(金玉準)
• 간행물 정보: 『자원환경지질』4권 1호, 1~9쪽, 전체 9쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1971.03.30

영문 초록

The “Younger Granites” in Korea were being believed to be late Cretaceous in age and named “Bulkuksa granites” by all previous works until the writer had discovered Jurassic granite in 1963. The present paper is to prove its validity by age dating on these granites which was carried out by Professor Y. Ueda, Tohoku University, Japan. The age of 37 granites samples from various localities ranges from 68 my to 181 my. Of these 10 samples belonged to early Jurassic, 6 samples to mid-Jurassic, 4 samples to late Jurassic, 5 samples to early Cretaccous, and 12 samples to late Cretaccous in age. It is of the writer’s opinion that the granites intruded in from early Jurassic to early Cretaceous age belong to Daebo granites and are syntectonic plutons associated with Daebo orogeny, and only those of late Cretaceous age belong to Bulkuksa granites that were associated with Bulkuksa disturbance. Daebo granites are aligned along NE-SW Sinian direction in the middle parts of Korea and crop out in the cores of folded mountains which were formed by Daebo Orogeny, such as Charyong, Noryong, Sobaek, and Dukyu Ranges. On the contrary Bulkuksa granites are restricted in Kyongsang basin and adjacent few localities in distribution and show no alignment. Granites supposedly associated with other disturbances of post-precambrian have not been found so far in S. Korea. Age dating of granites has revealed that Daebo orogeny might be continuous from Songrim distur bance of late Triassic age. From this viewpoint, it could be assumed that Daedong system of Jurassic age were deposited in separate intermontain basins while Daebo orogeny was active, so that Daedong system in separate localities in Korea could not been correlated in their lithology as well as stratig raphy.

목차

Ⅰ. 序言

Ⅱ. 過去의 硏究

Ⅲ. 쥬라紀 花崗岩類로 同定되는 野外調査資料의 몇가지 例

Ⅳ. 花崗岩類의 絶對年齡 測定結果

Ⅴ. 花崗岩類의 貫入時期와 地殼變動

Ⅵ. 結論

參考文獻

Abstract