从疑源类化石看内蒙古中部阿牙登组和腮林忽洞组  

AGE OF THE AYADENG AND SAILINHUDONG FORMATIONS IN CENTRAL INNER MONGOLIA ON THE STUDY OF ACRITARCH

作　　者：张玉清[1] 郝俊峰[1] 孙雨霞[1] 贾和义[1] 

机构地区：[1]内蒙古自治区地质调查院,内蒙古呼和浩特010020

出　　处：《地层学杂志》2004年第3期235-239,243,i002,共7页Journal of Stratigraphy

基　　金：中国地质调查局区域地质调查项目 ( 2 0 0 0 13 0 0 0 0 80 5 1)资助

摘　　要：阿牙登组和腮林忽洞组是上世纪 70年代 1/ 2 0万区调建立的地层单位 ,当时将阿牙登组置于白云鄂博群 ,腮林忽洞组归于震旦系。通过对以上两个组中疑源类化石进行研究 ,认为阿牙登组应从白云鄂博群中分出 ,与腮林忽洞组一同划归早寒武世至早奥陶世的地层中 ,阿牙登组与腮林忽洞组为同一时期不同局限海盆的沉积 ,是早古生代华北地台最北部边缘的沉积产物。The Ayadeng and Sailinhudong Formations were established in the 1970's by the regional geological survey, and the former was considered to belong to the Proterozoic Baiyunebo Group and the later belonged to the Sinian System. Now it is thought that two formations were formed in the same period from Early Cambrian to Early Ordovician and were deposited in different parts of sea basin on the northern edge of the North China Platform, based on the acritarchs contained in these formations. This result provides new evidence for studying the crustal evolution of the North China Platform in the Early Paleozoic.

关 键 词：疑源类 阿牙登组 腮林忽洞组 早寒武世 早奥陶世 内蒙古 

分 类 号：P534.33[天文地球—古生物学与地层学]