滇东地区奥陶系红石崖组的时代GRAPTOLITE FAUNA AND AGE OF THE HUNGSHIHYEN FORMATION ( ORDOVICIAN ) IN EASTERN YUNNAN,SOUTHWEST CHINA
张举,张元动,宋妍妍
摘要(Abstract)：
红石崖组是分布于滇东和川西南地区的一套红色的奥陶纪粗碎屑沉积地层,含笔石、几丁虫和疑源类等化石,过去通常认为其时代为阿仑尼格期(大致相当于当前国际划分的弗洛期和大坪期)。通过对云南禄劝桂花箐水库岸边、禄劝六江和昆明二村红石崖3条剖面的红石崖组进行了较为详细的化石采集,获得了大量笔石标本,鉴定出了2属15种。根据滇东地区红石崖组的笔石动物群,建立Corymbograptus varicosus笔石带,通过与国内外相关笔石动物群的对比分析,该带可与我国黔北地区的Acrograptus filiformis带、英国湖区的Corymbograptus varicosus带以及阿根廷西北部Acoite组的"Baltograptus deflexus带"进行较好对比,其时代应为早奥陶世弗洛期早中期。据此,红石崖组与其上的巧家组之间很可能缺失大坪期地层。
关键词(KeyWords)： 生物地层;笔石;红石崖组;奥陶系;滇东
基金项目(Foundation): 国家科技重点专项任务(2011ZX05008-001-10);; 国家自然科学基金(No.41172034)联合资助
作者(Author): 张举,张元动,宋妍妍
DOI: 10.19839/j.cnki.dcxzz.2013.01.002
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