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三水盆地位于珠江三角洲西北部,东起黄埔港,西到高要广利,北至清远县城,南至南海九江,呈不规则的菱形,面积约2500km~2,盆地中心沉积了近4000m 厚的白垩—第三纪地层。正确鉴定和划分这套地层,不仅对三水盆地及南海等地的油气勘探,而且对华南白垩纪地层的划分与对比都有着实际意义。本文通过对大塱山组孢粉组合特征的分析,重点探讨该组的时代归属,沉积时古气候及植物区系等问题。
Sanshui Basin is located in the northwestern Pearl River Delta, east of Huangpu Port, west to Gaoyou Guangli, north to Qingyuan County, south to the South China Sea Jiujiang, irregular diamond, an area of about 2500km ~ 2, the basin center deposition of nearly 4000m thick Chalk - Tertiary formation. Proper identification and demarcation of this set of strata have practical significance not only for oil and gas exploration in Sanshui Basin and South China Sea, but also for the division and comparison of the Cretaceous strata in South China. Based on the analysis of the characteristics of sporopollen assemblages in Dadushan Formation, this paper mainly discusses the age-affiliation, paleoclimate and sedimentary floristic of this group.