塔里木板块二叠纪构造演化的古植物群（大植物、孢粉）响应

摘要

The Tarim plate drifted constantly northward and collided with the Kazakhstan Plate during Permo-Carboniferous. In Carboniferous, the Tarim Plate was pieced together with the Yili Terrane of the Kazakhstan Plate. Then the Tarim-Yili Plate collided with the Kazakhstan Plate, and the Junggar Ocean finished subduction during Late Carboniferous and Early Permian. At last, the two plates were united into the southern part of the Angaran Land of the Pangea. The plate drifting resulted in the disappearance of the ocean between the Tarim Plate, the Kazakhstan Plate and the Junggar Plate. The plant distribution is mainly controlled by the climatic condition, and the geographic barriers also have an effect on the plant migration. The northward drift of the Tarim Plate led to the elevation of the plate and the cooling of climate there. As a result, the Euramerican flora of the plate was replaced by the exotic flora during the Permian. The northward drift of theTarim Plate is thought to be the principal impetus to the floral provincial succession of the plate. The Permian dry climate inthe northern hemisphere and the plant migration might have played positive roles in this succession. The whole floral succession of the Tarim Plate from the Euramerican stage to the Angara stage as described in this paper was recorded in the Permian deposits. The Permian floral succession of the Tarim Plate was controlled by the tectonic setting then and reflected the corresponding history of the plate drift. Three developing stages of the floral succession of the Tarim Plate have been recognized, viz.,①the Euramerican flora stage (Asselian-Roadian);②the Euramerican and Angara mixed flora stage (Wordian-Early Wuchiapingian);③the Angara flora stage (Middle-Late Wuchiapingian-Changhsingian).%塔里木板块二叠纪的构造演化导致板块古地理位置、古地貌和古环境的演变（包括气候条件的改变），相应地塔里木板块的植物群在区系性质方面发生了重要变更。该板块二叠纪植物群演替历史分为3个演化阶段：①欧美植物群阶段(阿赛尔期-罗德期)；②欧美-安加拉混生植物群阶段(沃德期-吴家坪期）早期；③安加拉植物群阶段(吴家坪期中晚期-长兴期）。