贵州及邻区奥陶纪红花园期岩相古地理特征

笔者于1986至1988年期间,对贵州及邻区早奥陶世岩相古地理进行了大量的野外及室内研究。在前人工作的基础上,综合自己的观察研究,对贵州及邻区红花园期岩相古地理特征获得较系统的认识。一、地层概况贵州及邻区早奥陶世红花园期的地层主要为: 在三都一带的同高组下部,湖南吉首为桃花石组或马刀堉组,向西至四川南部及贵州大部称红花园组。靠近古陆边缘的滇东及川西南为红石崖组下部。

Ordovician Honghuayuanian Sedimentary Facies and Palaeogeography in Guizhou and Its Adjacent Area

On the basis of spatial evolution of rock and fossil associations and their environmental significance, in combination with the previous results and comprehensive field and indoor investigation, three depositional systems and seven facies zones have been recognized for the Honghuayuanian sedimentary facies and palaeogeography in Guizhou and its adjacent area.
1. The terrigenous clastic depositional system
1)nearshore facies
2)offshore facies
2. The carbonate platform depositional system
1)open-sea platform facies
2)carbonate platform-beach facies
3)carbonate platform-margin reef facies
3. The shelf-basin depositional system
1)shelf facies
2)basin facies