滇西保山地区石炭纪、二叠纪古动物地理演化

探讨滇西保山地块晚古生代Ｔｉｎｇ类、有孔虫、珊瑚、牙形刺、腕足类等动物群的古生物地理属性，根据牙形刺和Ｔｉｎｇ类化石，确定长期争论的丁家寨组的时代为Ａｒｔｉｎｓｋｉａｎ期，小型单体珊瑚Ｃｙａｔｈａｘｏｎｉａ动物群可出现在从早石炭世到二叠纪的多种沉积环境中，不一定指示冷水冈瓦纳型。根据沉积特征及对环境特别敏感的珊瑚和Ｔｉｎｇ类动物群的分布特点，结合全球构造事件，恢复保山地块的古地理演化模式。早石炭世

CARBONIFEROUS AND PERMIAN ZOOGEOGRAPHICAL CHANGE OF THE BAOSHAN BLOCK,SOUTHWEST CHINA

The Carboniferous and Permian of the Baoshan block consist of three major depositional sequences: the Lower Carboniferous carbonate sequence, the Lower Permian siliciclastic sequence, and the Middle Permian carbonate sequence. These three sequences were interrupted by two major regressive events: the Namurian Uplift ranging in age from Serpukovian to Gzhelian and the Post Sakmarian Regression occurring after Artinskian in Baoshan block but its precise time interval is still unclear. Baoshan block was characterized by warm water, highly diverse, and abundant faunas during the Early Carboniferous, by cold water and low diverse faunas during the Early Permian, and by warm water but low diverse faunas during the Middle Permian. The conodont Sweetognathus bucaramangus fauna provides age constrain to the top boundary of the siliciclastic deposits, which contain glacio marine origin diamictites, to be Sakmarian to Early Artinskian. Paleozoogeographically, affiliation of the faunas in Baoshan block experienced apparent changes from the Eurasian in the Early Carboniferous, the Peri Gondwanan in the Early Permian to the Marginal Cathaysian/Cimmerian in the Middle Permian. Cimmerian blocks are more or less comparable one another in the Carboniferous and Permian. During the Middle Permian, the eastern Cimmerian blocks such as Sibumasu (s.s), Baoshan, and Tengchong are not far from the tropical palaeoequator, but further than the western Cimmerian blocks in light of the presence or absence of the index taxa such as fusulinids Eopolydiexodina and Neoschwagerina , corals Thomasiphyllum and Wentzellophyllum persicum.