东秦岭古生代古生物区与古地理变迁

本文根据对东秦岭古生代各纪古生物区的分析，指出在北美岭褶皱带，二郎坪海槽寒武纪放射虫和微浮游植物属华南区，奥陶纪头足类，腹足类、珊瑚为华北区，早志留世珊瑚为华南区，柿树园海槽中泥盆世至二叠纪孢子主要见于华南区，干江河海槽泥盆纪珊瑚，海百合为华南区。在南秦岭褶皱带，浙川陆棚寒武纪三叶虫有华北区和华南区的分子，奥陶纪牙形石、头足类由华南区变为华北区，晚奥陶世腕足类、三叶虫、珊瑚为华北区，而早志留世笔石，晚泥盆世珊瑚，腕足类和Ting、古植物以及早石炭世珊瑚和Ting均为华南区，南湾海槽泥盆纪孢子为华南区。在此基础上探讨了东秦岭古生代古地理变迁过程。

Paleozoic Paleobiogeographic Provinces and Paleogeographic Changes in the Eastern Qinling

According to the analysis of the Paleozoic paleobiogeographic provinces of the eastern Qinling, this paper points out that in the Erlangping trough of the northern Qinling folded belt the Cambrian radiolaria and microphytoplankton belong to the South China province, the Ordovican cephalopods, gastropods and coral belong to the North China province and the Silurian coral to the South China province; spores of the Middle Devonian to Permian in the Shishuyuan trough are mainly discovered in the South China province; and the coral and crinoids in the Ganjianghe trough belong to the South China province. In the Xichuan shelf of the southern Qinling folded belt, Cambrian trilobites belong to the North and South China provinces, Ordovician conodonts, cephalopods evolved from the South China province to the North China province, and the Late Ordovician brachiopods, trilobites and coral are from the North China province, while the Early Silurian graptolite and the Middle Devonian coral, brachiopods and plant as well as the Early Carboniferous coral and fusulinids are all from the South China province, and the spores in the Nanwan trough belong to the South China province. On this basis the paleogeographical changing process during the Paleozoic in the eastern Qinling is discussed.