黑龙江三江地区晚古生代沉积环境演化  

Evolution of Late Paleozoic sedimentary environment in Sanjiang area of Heilongjiang

作　　者：程泽恩 程日辉[1] 周洋 孔锦涛 周建波[1] CHENG Ze-en;CHENG Ri-hui;ZHOU Yang;KONG Jin-tao;ZHOU Jian-bo(College of Earth Sciences,Jilin University,Changchun 130061,China)

机构地区：[1]吉林大学地球科学学院

出　　处：《世界地质》2019年第3期814-828,共15页World Geology

基　　金：国家自然科学基金重大项目(41790453--4)

摘　　要：为深刻理解三江地区前白垩纪地层序列、岩相古地理面貌以及原型盆地构造运动与沉积演化的关联问题,笔者将研究区分为佳木斯地块与那丹哈达地体两部分,建立了佳木斯地块的地层序列。利用岩性、粒度和沉积构造等特征识别出中泥盆统黑台组、上石炭统珍子山组和下二叠统二龙山组的浅海相、三角洲相-湖泊相和火山相等主要沉积类型,恢复对应的岩相古地理面貌。佳木斯地块晚古生代经历了被动大陆边缘-主动大陆边缘的构造演化,发育弧后盆地;那丹哈达地体曾有浅海-深海盆地,现为增生或杂岩体,那丹哈达地体与佳木斯地块的相对运动控制了晚古生代沉积环境和盆地演化。In order to have a in-depth understanding of the pre-Cretaceous stratigraphic sequence,lithofacies and paleogeography in Sanjiang area,and the correlation between the tectonic movement and sedimentary evolution of the prototype basin,the authors divided the studied area into two parts:Jiamusi block and Nadanhada terrane,and established the stratigraphic sequence of Jiamusi block.According to the lithology,granularity and sedimentary structure,it is indicated that the Middle Devonian Heitai Formation comprises neritic facies,the Late Carboniferous Zhenzishan Formation comprises deltaic-lacustrine facies and the Early Permian Erlongshan Formation consists of volcanic facies,and the corresponding lithofacies paleogeographic features are recovered.Jiamusi block experienced the tectonic evolution from passive continental margin to active continental margin during Late Paleozoic,with back-arc basin developed.The Nadanhada terrane was once in shallow marine to deep marine but now occurred as accreting complex.Relative movement of the Nadanhada terrane and the Jiamusi block controlled the Late Paleozoic sedimentary environment and basin evolution.

关 键 词：岩相古地理 佳木斯地块 构造演化 沉积相 晚古生代 

分 类 号：X141[环境科学与工程—环境科学]