贵州东南部晚泥盆世至早石炭世孢子带和泥盆—石炭系界线

LATE DEVONIAN AND EARLY CARBONIFEROUS MIOSPORE ZONES FROM SOUTHEASTERN GUIZHOU AND THE BOUNDARY OF THE DEVONIAN AND CARBONIFEROUS

贵州东南部上泥盆统和下石炭统地层广泛分布,主要为浅水碳酸盐相沉积,下石炭统上部由海相和非海相砂岩和煤组成。根据孢子花粉研究,可以建立6个孢子带,即Vallatisporites pusillites-Verrucosisporites nitidus(PN)带;Vallatisporites verrucosus-Retusotriletes incohatus(VI)带;Crassispora trychera-Aurorasporamacra(TM)带;Lycospora pusilla(PU)带;Tripartites vetustus-Murospora aurita(VA)带和Convolutisporamallita-Murospora kosankei(MK)带。贵州东南部晚泥盆世和早石炭世孢子带可与华南和西南(西藏)同期孢子带比较.贵州东南部晚泥盆世和早石炭世孢子带基本上可与西欧、苏联和北美同时期孢子带比较.根据孢粉学资料,泥盆—石炭纪界线和古地理进行了讨论.

The Upper Devonian and Lower Carboniferous are widely developed in Southeast Guizhou and consists mainly of limestone of shallow marine facies; its upper part of the Lower Carboniferous is composed of alternating marine and non-marine sandstone and coals. A palynological zonation based on six successive assemblage zones, such as Vallatisporites pusillites-Verrucosis-porites mtiius (PN ) zone, Vallatisporites verrucosus-Retusotriletes inoohatus (Ⅵ) zone, Crassispora trychera-Auroras-para macra (TM) zone, Lycospora pusilla (PU) zone, Tripartites vetustus-Murospora aurita (VA) zone, and Convolutispora mallita-Murospora kosankei (MK) zone. The southeastern Guizhou miospore zonation of Devonian-Carboniferous transitional beds allows accurate correlations between assemblages originating from south and southwestern China. The spore zonations of Late Devonian and Early Carboniferous of southeastern Guizhou may be correlated basically with west Europe, U. S. S. A and North America. Based on palynological data, the boundary of the Devonian-Carboniferous, the palaeogeography are discussed.