地质科技情报2011，Vol.30Issue(2)：41-44,51,5.
早-中奥陶世之交笔石动物群全球分布及其控制作用
Global Distribution of Graptolite Fauna and Its Controlling Factor During the Lower-Middle Ordovician Transitional Period
摘要
Abstract
In order to study the controlling factors on the global distribution of graptolite fauna during the Lower-Middle Ordovician transitional period, the authors analyze the following data: (1)the distribution characteristics of the graptolite fauna trans-Yangtze platform, i.e. from basin facies to carbonate platform facies, and the transitional belt in between; (2) the influence of water depth on the distribution of graptolite fauna based on the morphological function analysis of the graptolite rhabdosome; (3) the global oceanic currents distribution model based on the paleogeography during that period and the oceanic currents model nowadays. Consequently, the authors doubted the hypothesis that the control factor for the distribution of graptolite fauna during this period is the water depth proposed and accepted by most predecessors. It is concluded that the graptolite distribution of the Lower-Middle Ordovician transitional period is controlled by oceanic currents. The formation of the oceanic currents is close related to the geographical changes.Therefore, it is reasonable to consider that the paleogeography and the oceanic currents together controlled the graptolite distribution.关键词
早-中奥陶世之交/笔石动物群分布/洋流/古地理Key words
Lower-Middle Ordovician transitional period/ distribution of graptolite fauna/ oceanic currents/ paleogeography分类
生物科学引用本文复制引用
王传尚,汪啸风..早-中奥陶世之交笔石动物群全球分布及其控制作用[J].地质科技情报,2011,30(2):41-44,51,5.基金项目
国家自然科学基金项目(40742008 （）
40272020) （）
中国地质调查局项目(1212010782005) （1212010782005）
