CAJ | 학술논문

依莎克群由上、中、下3个断片构成,并非连续性沉积地层.区域上依莎克群上部碎屑岩段(晚泥盆—早石炭世)和下部基性火山岩段(震旦—寒武纪)地层年龄差别大,呈断层接触,依沙克群作为一个统一岩石地层单元已不合适.将依莎克群下部基性火山岩单独划分出来,命名为库地岩组.库地岩组火山岩属大洋拉斑玄武岩浆产物,成分特征接近洋中脊玄武岩,岩浆源于上地幔分熔,具蛇绿岩性质,时代为早青白口世至早寒武世.
의사극군유상、중、하3개단편구성,병비련속성침적지층.구역상의사극군상부쇄설암단(만니분—조석탄세)화하부기성화산암단(진단—한무기)지층년령차별대,정단층접촉,의사극군작위일개통일암석지층단원이불합괄.장의사극군하부기성화산암단독화분출래,명명위고지암조.고지암조화산암속대양랍반현무암장산물,성분특정접근양중척현무암,암장원우상지만분용,구사록암성질,시대위조청백구세지조한무세.
@@@@The Yishake group consists of three fragments,the upper、the middle and the lower,which is not continuouse sedimentary strata.The clastic rock member (from late devonian to early carboniferous) in the upper part of the yishake group and the basic volcanic rock member (the age focus on Sinian to Cambrian) in the lower part of the yishake group, of which strata age has obvious difference and it is in fault contact.As a unified element of rock strata, the yishake group is no longer appropriate.Being divided from the yishake group,the basic volcanic rock in the lower part is named kudi ophiolite,and its age is early Qingbaikou epoch to Early Cambrian (Qb1-∈1) in this paper.