[关键词]
[摘要]
聂拉木是西藏南部志留纪含笔石地层(石器坡组)的主要产地。近期在该地亚来村新发现一批笔石标本, 包括Normalograptus sp.、Glyptograptus sp.、Campograptus lobiferus、C. cf. lobiferus、C. cf. obtusus、C.? circularis、 Lituigraptus cf. convolutus、Rastrites cf. perfectus、Stimulograptus sedgwickii、Streptograptus sp.和Torquigraptus decipiens。该组合面貌确定其属于志留系兰多维列统埃隆阶上部Lituigraptus convolutus带至Stimulograptus sedgwickii带。这一新材料的发现, 使西藏南部的志留纪地层得以作全球对比。
[Key word]
[Abstract]
Silurian graptolite-bearing strata in Nyalam County are one of the few known sources of Silurian graptolites in southern Xizang (Tibet). Recent graptolite collections from the Shiqipo Formation at Yalai Village, Nyalam County, contain Normalograptus sp., Glyptograptus sp., Campograptus lobiferus, C. cf. lobiferus, C. cf. obtusus, C.? circularis, Lituigraptus cf. convolutus, Rastrites cf. perfectus, Stimulograptus sedgwickii, Streptograptus sp. and Torquigraptus decipiens. This assemblage indicates a late Aeronian (Llandovery) age (Lituigraptus convolutus to Stimu- lograptus sedgwickii biozones). This new finding provides the potential for the correlation of Silurian strata between Xizang (Tibet) and other parts of the world.
[中图分类号]
[基金项目]
第二次青藏高原科学考察研究(2019QZKK0706)、中国科学院战略性先导科技专项(B 类) (XDB26000000)、国家自然科学基金(42102013)和中国地质科学院地质调查项目(DD20221829)联合资助
