黄土剖面古土壤和生物化石<sup>14</sup>C测年对比

杨明生; 张虎才; 丁虎; 雷国良; 樊红芳; 常凤琴; 李斌; 张文翔; 牛洁; 陈玥

Volume 30 Issue 5

Sep. 2005

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Article Navigation > Earth Science > 2005 > 30(5): 589-596

YANG Ming-sheng, ZHANG Hu-cai, DING Hu, LEI Guo-liang, FAN Hong-fang, CHANG Feng-qin, LI Bin, ZHANG Wen-xiang, NIU Jie, CHEN Yue, 2005. 14C Dating of Paleosol and Animal Remains in Loess Deposit: A Comparative Study. Earth Science, 30(5): 589-596.

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YANG Ming-sheng, ZHANG Hu-cai, DING Hu, LEI Guo-liang, FAN Hong-fang, CHANG Feng-qin, LI Bin, ZHANG Wen-xiang, NIU Jie, CHEN Yue, 2005. ¹⁴C Dating of Paleosol and Animal Remains in Loess Deposit: A Comparative Study. Earth Science, 30(5): 589-596.

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¹⁴C Dating of Paleosol and Animal Remains in Loess Deposit: A Comparative Study

1.
National Laboratory of Western China'S Environmental Systems, MOE; College of Earth Sciences and Environments, Lanzhou University, Lanzhou 730000, China
2.
Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences(CAS), Nanjing 210008, China
3.
Graduate School, Chinese Academy of Sciences, BeOing 100039, China

Received Date: 2005-05-17
Publish Date: 2005-09-25

Abstract

Abstract

Dating paleosol and animal remains accurately and reliably is of crucial importance in reconstructing environmental change processes and researching the relationship between natural environments and human evolution. Dating different components in the same specimen and differentiating their ages is also important for tackling problems such as carbon storage state and soil carbon sources. Conventional ¹⁴C and AMS dating on animal remains (fossil bone and teeth) and inorganic and organic soil matter from a typical loess section at Xinglong Mountain, Yuzhong County, Gansu Province reveal that three different substances in the specimen from the same sampling position possess different ¹⁴C ages: the age of inorganic matter is 2 624 years older than that of organic matter, which is dated at (3 682±70) a. According to the reliability analysis of these ¹⁴C ages, laboratory error is negligible, but the ¹⁴C resources, the component of ¹⁴C and the proportion of "dead carbon" are the main factors influencing ¹⁴C dating results. It is only possible to date the geological events correctly and reliably by analyzing the reasons generating these differences and the age comparison of different substances may provide information on paleoclimate and paleoenvironment. A 2 000 year difference between the ¹⁴C ages of fossil and organic soil matter might indicate that a sediment gap exists, which is very important when reconstructing paleoclimate by loess section.
- loess and paleaosol,
- animal remains,
- organic matter,
- inorganic matter,
- conventional ¹⁴C and AMS dating

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References(45)

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¹⁴C Dating of Paleosol and Animal Remains in Loess Deposit: A Comparative Study