滇西中奥陶世向阳组下部的腕足动物群  

LATE ARENIGIAN STRATA AND BRACHIOPODS FROM DALI,EASTERN WEST YUNNAN,SW CHINA

作　　者：许汉奎[1] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008

出　　处：《古生物学报》2012年第3期334-350,共17页Acta Palaeontologica Sinica

摘　　要：滇西东部中奥陶世地层分布不广,主要在大理和宁蒗地区。大理的中奥陶统为向阳组,向阳组下部含有大量双壳类、腕足类及少量三叶虫化石,在我国奥陶纪地层中甚为特别,其中腕足类迄今没有系统研究。文中详细描述向阳组的腕足类化石,不仅可以进一步确定其地层时代、分析其生态环境,也可从中了解它与滇西西部和滇东扬子区相关腕足动物群之间的关系,从而说明滇西东部应属于印支地体。West Yunnan was attributed to the Shan-Thai Terrane or to the Sibumasu Terrane by some geologists （Burrett et al. , 1990; Fortey and Cocks, 1998） （Text-fig. 2）. Alternatively by other geologists it has been divided into eastern and western parts along the Lanchangjiang Fault. assigned respectively to the Indo-China and Sibumasu terranes （Metcalfe, 1988; Zhou et al., 1998; Zhou et al.,2001; Fang et al. , 2004） （Text-fig. 3）.

关 键 词：腕足动物群 印支地体 向阳组下部 滇西东部 

分 类 号：Q915[天文地球—古生物学与地层学]