| 南雄盆地武台岗白垩系与古近系界线剖面研究进展 |
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| 关键词:E/K boundary Wutaigang section Nanxiong Basin Guangdong |
| 基金项目:国土资源部地质调查项目“新一轮全国地下水资源评价”(编号:0299209078) |
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| New Advances in the Study of Cretaceous and Paleogene Boundary on the Wutaigang Section of the Nanxiong Basin, Guangdong Province |
| Shanghudong and Wutaigang are typical areas responsible for the name Shanghu Formation, where abundant mammal fossils occur. Although the Early and Middle Paleocene mammal fauna was studied in detail long ago, the microfossils in this area have not been reported till now. In recent years, a lot of ostracods, gastropodas and charophytes were found from the Upper Member of Zhenshui Formation to the Lower Member of Shanghu Formation within the Wutaigang section. These ostracods belong to the Porpocypris assemblage and can be subdivided into the Porpocypris orbiculata zone and the P. sphaeroidalis zone. The first occurrence of the P. sphaeroidalis zone almost coincides with that of the Bemalambda zone. The authors suggest that the first occurrence of P. sphaeroidalis limits the bottom boundary of Paleocene, and hence the E/K boundary should lie between the P. sphaeroidalis zone and the P. orbiculata zone. |
| ZHANG Xian-qiu,ZHANG Zhi-jun,LI Hong-bo,FANG Xiao-si.2007.New Advances in the Study of Cretaceous and Paleogene Boundary on the Wutaigang Section of the Nanxiong Basin, Guangdong Province[J].Acta Geoscientica Sinica,28(3):299-308. |
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