东北地区早泥盆世岩相古地理研究  

Lithofacies Palaeogeography of Early Denovian in Northeast China

作　　者：李守军[1] 黄彭彭 赵立伟 贺淼[1] 陈法彬[1] 马文昭[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 [2]赤峰工业职业技术学院电力冶金工程系,内蒙古赤峰024005

出　　处：《山东科技大学学报（自然科学版）》2014年第4期6-15,共10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)

摘　　要：利用野外实测剖面资料和区域地质资料,在地层划分、对比和构造格局研究的基础上,从点-线-面的沉积相分析入手,将早泥盆世分为洛霍考夫期-布拉格期、埃姆斯期两个编图单元进行岩相古地理编图,恢复了东北地区早泥盆世的岩相古地理面貌。研究表明,早泥盆世东北地区主要发育浅海陆棚、碳酸盐台地、无障壁海岸和海岛环境沉积体系;存在额尔古纳和松辽两个主要的古陆区,其余地区以浅海相沉积为主,仅在内蒙古东乌珠穆沁旗哈诺敖包一带为滨海沼泽相沉积;沿贺根山-扎兰屯一线为陆间洋盆俯冲形成的蛇绿混杂岩带;岩相带在南部地区的华北北缘台地相呈东西向展布,此带以北的大部地区多呈北东向展布。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 paleogeographic maps of Lochkovian-Pragian and Emsian of Early Devonian were mapped in the Northeast China. The study shows that the sedimentary systems include main- ly neritic shelf sedimentary system, carbonate platform sedimentary system, no barrier coast sedimentary system and island environment sedimentary system during the Early Devonian in Northeast China. The old lands are the Eergu＇na and Songliao,the other areas are the shallow sea facies,and only in Hanoch＇obo of East Ujimqin Banner are the littoral facies. Along the line of the Hegen Mountain-Zhalantun there is the ophiolitic melange belt caused by the subduction of the ocean basin between the old lands; the distribution of lithologic facies falls into two types,one is the plateform facies in the EW direction in the south part of the study area,the other is in the NE direction in the other areas of Northeast China.

关 键 词：沉积相 岩相古地理 早泥盆世 东北地区 

分 类 号：P531[天文地球—古生物学与地层学]