| Li Peiying,Liu Baozhu,Liu Lejun,Zhou Moqing. 1996. Magnetostratigraphy of coastal loess of Dalian, China and its paleoclimatic significance. Acta Oceanologica Sinica, (4):493－513 |
| Magnetostratigraphy of coastal loess of Dalian, China and its paleoclimatic significance |
| Magnetostratigraphy of coastal loess of Dalian, China and its paleoclimatic significance |
| Received:May 01, 1996 Revised:July 02, 1996 |
| DOI： |
| Key words:Dalian coastal loess magnetostratrigraphy paleoclimatic |
| 中文关键词: Dalian coastal loess magnetostratrigraphy paleoclimatic |
| 基金项目: |
| Author Name | Affiliation | | Li Peiying | First Institute of Oceanography, State Oceanic Administration, Qingdao 266003, China | | Liu Baozhu | College of Marine Geosciences, Ocean University of Qingdao, Qingdao 266003, China | | Liu Lejun | First Institute of Oceanography, State Oceanic Administration, Qingdao 266003, China | | Zhou Moqing | Institute of Marine Geology, MGMR, Qingdao 266071, China |
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| Abstract: |
| The section of Yujiawaizi Loess in Dalian, one of the typical sections of China's coastal loess, revealed three reliable polarity reversal events, i.e.,Mungo Event (27.5-23.7 ka BP), Laschamp Event (43.5-37.3 ka BP) and Blake Event (125. 4-110.5 ka BP);while reliability of the fourth one, Gothenburg Event, retrains to be confirmed. Based on TL datings, polarity events and magnetic susceptibility, the authors have tentatively established the time series of coastal loess accumulation since 140 000 a BP, and estimated the accumulation rate of Lt. Meanwhile, the high-resolution magnetic susceptibility curve since 140 000 a BP can be correlated with that of the inland loess in northwest China and δ 18O curves of polar ice core and deep sea cores, but there are still some differences, representing the particular characteristics of coastal environmental evolution. At last, integrating the polarity strata, magnetic susceptibility and other relative data, the authors have probed into the paleoenvironmental changes since 140 ka BP and climate oscillation cycle of different scale, polarity events and glacial-postglacial climate transition, differences in climate and environment between the early and late stages of last glacial period, and the continuance of coastal loess accumulation. |
| 中文摘要: |
| The section of Yujiawaizi Loess in Dalian, one of the typical sections of China's coastal loess, revealed three reliable polarity reversal events, i.e.,Mungo Event (27.5-23.7 ka BP), Laschamp Event (43.5-37.3 ka BP) and Blake Event (125. 4-110.5 ka BP);while reliability of the fourth one, Gothenburg Event, retrains to be confirmed. Based on TL datings, polarity events and magnetic susceptibility, the authors have tentatively established the time series of coastal loess accumulation since 140 000 a BP, and estimated the accumulation rate of Lt. Meanwhile, the high-resolution magnetic susceptibility curve since 140 000 a BP can be correlated with that of the inland loess in northwest China and δ 18O curves of polar ice core and deep sea cores, but there are still some differences, representing the particular characteristics of coastal environmental evolution. At last, integrating the polarity strata, magnetic susceptibility and other relative data, the authors have probed into the paleoenvironmental changes since 140 ka BP and climate oscillation cycle of different scale, polarity events and glacial-postglacial climate transition, differences in climate and environment between the early and late stages of last glacial period, and the continuance of coastal loess accumulation. |
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