https://repository.kopri.re.kr/handle/201206/5223 Sat, 18 Apr 2026 22:24:18 GMT 2026-04-18T22:24:18Z https://repository.kopri.re.kr/handle/201206/6646 Title: K-Ar age of the plutonic rock fragments discovered from the Deception Island and its geologic implication Authors: 박주언; Park, Byoung-Kwon; Lee, Jong Ik; Park, Kye-Hun Abstract: Many plutonic rock fragments of granitic composition were collected from the Deception Island. We obtained K-Ar ages of 62.5±1.2 Ma and 140.7±2.7 Ma from the two samples. Such result contradicts the general belief that most of the volcanic rocks of Deception Island are products of very recent activities and their maximum age does not exceed 200 ka. On the other hand, Mesozoic to Cenozoic rocks produced by subduction-related active magmatism have been reported from both South Shetland Islands and Antartic Peninsula, located to the north and south of the Deception Island respectively. Also, various kinds of plutonic rocks with granitic composition are distributed widely. Therefore, plutonic rock fragments with granitic composition discovered from the Deception Island seem to indicate their derivation by capturing granitic crustal material underlying volcanic edifice during the volcanic activities, instead of differentiation from magmas related with recent volcanism. Ages and rock types of the plutonic rock fragments suggest arc-related origin just as adjacent South Shetland Islands and Antarctic Peninasula. Tue, 01 Jan 2008 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/6646 2008-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/7808 Title: Geochemistry of volcanics in Deception island Authors: Lee, Jong Ik; 박한나라; Park, Kye-Hun Abstract: 디셉션섬은 남극반도와 남아메리카대륙 사이의 남셰틀란드군도의 아래에 위치한 브랜스피르해협의 서쪽 끝에 위치하고 있다. 섭입대의 영향으로 배호분지가 발달하고 여기에서 새로운 해양지각이 형성되기 시작했다. 본 연구에서는 주원소, 미량원소, Sr-Nd-Pb 동위원소분석을 통하여 디셉션섬의 화산암의 지구조 환경과 기원물질에 대해 논의한다. Tue, 01 Jan 2008 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/7808 2008-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/7619 Title: Analysis of trace element in lichen reference material(IAEA lichen 336) by Inductively Coupled Plasma Mass Authors: Choo, Mikyung; Kim, Kyu Han; Lee, Jong Ik; Chung, Kyung Ho; Hur, Soon Do Abstract: 유도결합플라즈마 질량분석기(ICP-MS)를 이용한 지의류 표준물질(IAEA lichen 336) 미량원소 분석 Sun, 01 Jan 2006 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/7619 2006-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/5953 Title: New Approach on the Extinction of Spreading at the Phoenix Ridge, Antarctica Authors: Choe, Won Hie; Lee, Jong Ik; Jin, Young Keun; Hur, Soon Do; Lee, Mi Jung Abstract: K-Ar ages have been determined for the submarine basalts dredged from the P2 and P3 segments of the Phoenix Ridge, Drake Passage, Antarctica, for better understanding on the extinction of seafloor spreading. At the P3 segment, the K-Ar ages of the rifted ridge basalts are 3.5-6.4 Ma, and those for the axial seamount basalts are 1.5-3.1 Ma. The K-Ar ages for the basalts at the rifted ridge and axial central high in the P2 segment are 2.1 and 1.4-1.9 Ma, respectively. We suggest that the extinction of seafloor spreading at the P3 and P2 segments occurred at 3.3 and 2.0 Ma, respectively, on the basis of ridge structure and formation time of basalts. This result favors the a stepwise extinction model rather than a simultaneous one on the extinction of the Phoenix Ridge. Sat, 01 Jan 2005 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/5953 2005-01-01T00:00:00Z