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对福建海坛岛青峰老红砂进行了系统的光释光测年研究,结合已发表的相关测年数据,在统一的时间标尺上探讨了老红砂发育过程及其与海平面变化和东亚季风变化之间的关系。结果表明:1 QFS剖面沉积年龄为110~33 ka,起始发育年龄延伸到了末次间冰期。主要涵盖了MIS5c~MIS3阶段,其中存在4个快速堆积期。结合已发表的年代学数据进行综合分析,认为前人得出的老红砂发育在末次冰期以来的结论需要得到修正。2华南老红砂发育过程与区域海平面变化密切相关。在末次间冰期和末次冰期均有发育,高海面(>-50 m)或较高海面(-50~-70 m)时期是老红砂普遍发育期。区域地壳运动叠加海平面变化造成闽南和闽东北老红砂的沉积差异:海退过程中的较高海面时期北部先发生快速堆积;海侵过程中的较高海面时期南部先发生快速堆积。LGM(海平面<-70 m)期,老红砂不发育。3老红砂在冰期-间冰期尺度上的沉积速率体现了源区气候和海平面变化对老红砂物源输送的双重制约。
The photosynthetic light dating of Qingshan old red sand in Haitan, Fujian Province was systematically studied. Based on the published relevant dating data, the developmental process of the old red sand and its relationship with the sea level change and East Asia The relationship between monsoon changes. The results show that the sedimentary age of the QFS profile is 110-33 ka, and the initial developmental age extends to the last interglacial. Mainly covers MIS5c ~ MIS3 stage, in which there are 4 rapid accumulation period. Combined with the published chronological data to conduct a comprehensive analysis, the conclusion drawn by the predecessors that the development of the old red sand had been refined in the last glacial period needs to be revised. 2 The developmental process of red sand in South China is closely related to the regional sea level change. It developed in the last interglacial and last glacial periods. The period of high red sea (> -50 m) or higher sea level (-50 ~ -70 m) was the common development period of red sandstone. The regional crustal movement superimposes the sea level change and causes the difference of sediment of the early red sandstone between the southern Fujian and northeastern Fujian: the rapid accumulation in the northern part of the sea during the high sea level retreat; the rapid accumulation in the southern part of the high sea level during the transgression. LGM (sea level <-70 m) period, the old red sand is not developed. 3 Sediment rate of the older red sand in the glacial-interglacial periods reflects the dual constraints on the source transport of the older red sand by source climate and sea level changes.