广西运动的进程:来自生物相和岩相带的证据

来源 :中国科学:地球科学 | 被引量 : 0次 | 上传用户:jinr0op3
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广西运动的启动时间在华南不同地点可能存在差异,需要在多个地区开展精细的地层学研究,以精确再现此次运动的进程.笔者重新采集并研究了广东境内若干地点的奥陶系始兴组和龙头寨组(与赣南的陇溪组相当)的笔石,认为广东境内笔石黑色页岩相转为近岸浅水碎屑岩相略早于贑南,因此可能指示广西运动还有一个由南而北的过程.笔者还根据多年来积累的关于珠江盆地西部和江南斜坡带(包括闽西、粤东、桂北、湖南、赣东北、皖南和浙西等地)的奥陶系地层与古生物资料,论证了珠江盆地和江南斜坡带从晚奥陶世桑比期至凯迪晚期生物相、岩相带的横向展布格局及其演替过程,从而进一步印证了广西运动进程中的不同阶段特征,并探讨了该运动对扬子地台的影响. The start-up time of Guangxi movement may be different in different locations in South China, and fine stratigraphic studies need to be carried out in many areas to accurately reproduce the process of this movement.The author re-collected and studied the Ordovician Shixing Group and the Longtouzhai Formation (equivalent to the Longxi Formation in southern Jiangxi Province) believe that the penolith black shales in Guangdong were converted to near-shore shallow-water clastic rocks slightly earlier than Taonan and may therefore indicate that there are still A process from south to north.The author also based on the accumulation of years on the Pearl River Basin in western and southern slope belt (including Western Fujian, eastern Guangdong, Guangxi, Hunan, Jiangxi northeast, southern Anhui and western Zhejiang and other places of Ordovician Stratigraphic and palaeontological data to demonstrate the horizontal distribution pattern and its succession process of the late Bioclase and lithofacies in the Late Ordovician Sambi Period and Kaidi from the Pearl River Basin and the Jiangnan Slope, which further confirms the different stages in the movement process of Guangxi Characteristics, and explored the impact of the campaign on the Yangtze platform.
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