东北地区晚泥盆世岩相古地理研究  

Lithofacies Palaeogeography of Late Devonian in Northeast China

作　　者：马文昭[1] 李守军[1] 黄彭彭 陈法彬[1] 高丽华[1] 陈茹[1] 

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590

出　　处：《山东科技大学学报（自然科学版）》2014年第5期15-21,共7页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：中国石化先导研究项目(YPH08054;YPH08059);国家自然科学基金项目(41372134)

摘　　要：利用野外实测剖面和区域地质资料,在地层划分和对比、构造格局研究以及早中泥盆世研究基础上,从点—线—面的沉积相分析入手,将晚泥盆世的弗拉斯期和法门期作为一个编图单元进行岩相古地理编图,恢复了东北地区晚泥盆世的岩相古地理面貌。研究表明,晚泥盆世东北地区主要发育浅海陆棚沉积体系(浅海陆棚相)、无障壁海岸沉积体系(滨海相)、三角洲沉积体系(三角洲相)、碳酸盐台地沉积体系(局限台地、开阔台地相、台缘斜坡相)和障壁海岸沉积体系(潟湖、潮坪相);存在额尔古纳和松辽两个主要古陆区,其余地区以滨、浅海相沉积为主。黑龙江小河里河、内蒙古卧都河地区发育三角洲相沉积;苏尼特左旗西南部受到海侵影响,海侵方向由西向东,发育滨海相沉积;沿贺根山-扎兰屯一线仍为陆间洋盆俯冲形成的蛇绿混杂岩带。On the basis of stratigraphic division, correlation, and the study of structural pattern, the field data of the measurement strata sections and the existing regional geological data were used to do the sedimentary facies analysis from the sections to the whole study area. The lithofacies Palaeogeographic maps of Frasnian and Famennian of I.ate Devonian were mapped in the Northeast China. The study shows that the late Devonian Northeast mainly develops shallow shelf depositional systems,coastal depositional system,deltaic depositional systems and barrier coast deposi- tional systems;Ergun and Songliao are the two major ancient land area while the rest to shore shallow facies bit host. In small river in Heilongjiang River, River region of Inner Mongolia develop lying delta facies; southwest Sunitezuo banner are affected by the transgression in west-to-east direction, producing coastal facies. Along Hegens- han-Zhalantun line are land between the ocean basin subduction ophiolite belt.

关 键 词：沉积相 岩相古地理 晚泥盆世 东北地区 

分 类 号：P531[天文地球—古生物学与地层学]