摘要
延边地区地处吉林省的东部。研究区南部为渤海地块，北部为兴凯地块，东部与朝鲜和俄罗斯相毗邻，西部与吉中地区以敦化—密山断裂为界。本文着重介绍延边地区渤海地块北缘及兴凯地块南缘的大陆增生历史和这两个古板块之间的古板块缝合带的地质特征，并据此对上述两板块之间的古板块缝合带的地理位置和形成时代进行探讨。
Based on three sheets,i.e.Baishan sheet,etc.(1∶50 000)in the Hunjiang area,southern Jilin province,and through trying to apply the theory of the sequence stratigraphy,the surface of unconformity(sequence interface)with different characteristics and recongnition guide of the condensed section were preliminarily summed up;mineral distributive characteristics in the stratigraphic sequence were analysed;and a method on the stratigraphic sequence analysis with rocks(lithology,fabric)of the section,mutually conversed interface as a base was discussed.There by,the Neoproterozoic early Paleozoic strata are divided into three Ⅱ sedimentary sequences,and seven Ⅲ sedimentary sequences in the Hunjiang area.
出处
《吉林地质》
1997年第2期30-37,共8页
Jilin Geology
基金
国家计委三十届国际地质大会科技项目
关键词
缝合带
渤海地块
兴凯地块
地块
延边地区
Hunjiang area Sequence stratigraphy Surface of unconformity Condensed section
