兴蒙—新疆北部及邻区早石炭世古生物地理区系

中国兴蒙—新疆北部及邻区早石炭世地层十分发育，动植物化石丰富。根据生物群综合分析，将该研究区归入哈萨克斯坦—西伯利亚域和特提斯域，并进一步划分为３个省，８个亚省。西伯利业省以管孔贝大量发育为特征，缺少大长身贝类，珊瑚不甚发育，植物少见，为安加拉植物群；哈萨克斯坦—蒙古—兴安省以管孔贝类和大长身贝类共同发育为突出特征，珊瑚较发育，但分区特征不明显，并有大量异珊瑚类，植物为安加拉植物群；塔里木北缘—西秦岭省以南方型生物群大量发育为主要特征，大长身贝类最为发育，缺少管孔贝类，珊瑚数量十分丰富，并有假乌拉珊瑚大量发育，植物以华夏植物群为主。早石炭世古生物地理分区与板块关系密切，晚泥盆世末，西伯利亚板块南移，与哈萨克斯坦板块汇聚，到早石炭世早、中期，两大板块基本上处于相近似的古生物地理环境，与此同时，塔里木板块逐渐北移，与哈萨克斯坦板块海水相通，致使哈萨克斯坦板块广大海域出现南、北动物群混生现象。早石炭世末，三大板块海域相连，除各地沉积和构造古地理环境尚有差异外，中石炭世开始，腕足类，类及珊瑚等动物群均显示出明显的一致性。

EARLY CARBONIFEROUS PALAEOBIOGEOGRAPHICAL PROVINCES IN XINGMENG-NORTHERN XINJIANG AND NEIGHBORING AREA

Early Carboniferous in the study area has well-developed sediments and rich fossils. By analysis of fauna and flora,the study area is subordinate to Kazakhstan-Siberia domain and Tethys drirnain which include three provinces and eight subprovinces. The Siberia province is characterized by great development of Syringothwts, but lack of Gigantoproductus and less development of corals and plants, belonging to Angara flora. Kazakhstan-Mongolia-Xingan province is characterized by well development of Syringothyris and Gigantoproductus, relative development of corals, and large amount of Heterophyllia plants, belonging to Angara plants. Tarim northern margin-West Qingling province is mainly characterized by South-type fauna and flora which contain well-developed Gigantoproductus,but few Syringothyris, large amount of corals and great development of Pseudouralinia, and Cathynian flora.Early Carboniferous palaeobiogeographic divisions are closely related with plates. At the end of Late Devonian, Siberia plate migrated southward and collided witll Kazakhstan plate. UP to early-middle stage of Early Carboniferous, the two plats were located at the same palaeobiogeographic environment. Meanwhile Tarim plate migrated northward, and connected with Kazakhstan plate by seawater, resulting in mixture of South and North flora in the wide sea of Kazakhstan plate. At the end of Early Carboniferous, three plates were connected together by seawater. Brachiopoda, fusunilidea and corals etc. show obvious consistence except the sediments and palaeogeographic environment since Middle Carboniferous.