고흥 마복산 부근에 분포하는 심성암류의 암석지구화학과 금함량

• 발행기관: 대한자원환경지질학회
• 저자명: 윤정한 김정빈 오근창
• 간행물 정보: 『자원환경지질』32권 6호, 585~597쪽, 전체 13쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 1999.12.30

영문 초록

Plutomic rocks of the Mabogsan, located in the southestern part of the Koheung Eup are composed of granite gneiss, diorite, biotite grantie and granophyre. On the basis of Rb-Ba-Sr diagram, the diorires are plotted from granodiorite to quartz diortie, the biotite granites from granodiortie to anomalous granite and the granophyres in normal granite filed. The plutonic rocks tend to show the I-type characteristics in terns of ACF diagram, K2O-Na2O diagram and Al2O3+Na2O+K2O+CaO diafram, while have values of ilmenite series in magnetic subseptibility. The plutons could have formed in the tectonic environment of VAG+COLG+ORG based on the silica vs. trace element diagrams. Gold contents with major and trace elements have been determined for 21 granophyres, 13 biotite granites and 4 diorites are; (1) for the diorite, the rangs is 0.508∼1.73 ppb with an average of 0.5ppb;(2) for the biotite granites, the range is 0.449∼13.5ppb with an average of 3 ppb;(3)for the granphyres, the range is 0.508∼23.1ppb with an average of 4.5ppb. The gold content of the studied plutons tends to increase from mafic to felsic rocks. Gold contents tend to show positive correlations with those of Ag and Zn, negative correlations with those of As, Ba and Rb. The copper contents of the plutons are comparatively high. Average copper contents of diorite, biotite granite and granophyre are 710ppm, 587ppm and 484ppm, respectively. The copper contents of the plutons tend to have good correlations with those of Ag, Bi and Pb.

키워드

고흥 지역 영남 육괴 심성암류 화성암류에 대한 기재와 화산구조적 연구