甘孜绒坝岔古冰川演化与黄土古土壤对比研究

冰川冻土 ›› 2003, Vol. 25 ›› Issue (5): 504-509.

甘孜绒坝岔古冰川演化与黄土古土壤对比研究

许刘兵¹, 周尚哲^1,2, 李昌爱³, 崔建新¹, 赵井东⁴, 业渝光⁵

1. 兰州大学, 资源环境学院, 甘肃, 兰州, 730000;
2. 华南师范大学, 地理系, 广东, 广州, 510631;
3. 安徽师范大学, 地理系, 安徽, 芜湖, 241000;
4. 徐州师范大学, 地理系, 江苏, 徐州, 221000;
5. 地质矿产部, 海洋地质研究所, 山东, 青岛, 266071

收稿日期:2002-10-08 修回日期:2003-01-08 出版日期:2003-10-25 发布日期:2012-04-26
作者简介:许刘兵(1976-), 男, 安徽安庆人, 2000年毕业于安徽师范大学, 现为兰州大学在读博士生, 主要从事冰川与全球变化研究.E-mail:xuliubing234@163.com
基金资助:
国家自然科学基金项目(49971080);国家重点基础研究发展规划项目(G1998040811)资助

The Quaternary Glaciation in Rongbacha and Correlation with the Loess-Paleosol in Garz?

XU Liu-bing¹, ZHOU Shang-zhe^1,2, LI Chang-ai³, CUI Jian-xin¹, ZHAO Jing-dong⁴, YE Yu-guang⁵

1. College of Resource and Environment, Lanzhou University, Lanzhou Gansu 730000, China;
2. Department of Geography, South China Normal University, Guangzhou Guangdong 510631, China;
3. Department of Geography, Anhui Normal University, Wuhu Anhui 241000, China;
4. Department of Geography, Xuzhou Normal University, Xuzhou Jiangsu 221000, China;
5. Institute of Marine Geology, MGMR, Qingdao Shandong 266071, China

Received:2002-10-08 Revised:2003-01-08 Online:2003-10-25 Published:2012-04-26

摘要/Abstract

摘要： 横断山脉绒坝岔,保留有从倒数第二次冰期到新冰期的较完整的冰川沉积序列.对冰碛物进行了ESR测年,其分别形成于5 6kaBP、新冰期与末次冰期之间、16.3kaBP、18.7kaBP、43.7kaBP以及倒数第二次冰期.TL测年结果显示,甘孜雅砻江江畔阶地黄土从末次冰期之初开始堆积,结合甘孜黄土古土壤序列代用指标的综合分析,发现绒坝岔冰碛物形成年代与甘孜剖面黄土、古土壤沉积年代有较好的对应关系.末次冰盛期(LGM),绒坝岔冰碛垄走向有一次接近90°的改变;末次冰期间冰段,对应于MIS3b,其冰川规模甚至超过了LGM时期.

关键词: 绒坝岔冰川, 横断山脉, ESR测年, 黄土沉积

Abstract: Rongbacha paleoglaciers of Garz? are located in the Hengduan Mountains, which lies in the eastern part of the Tibetan Plateau. They are the typical Quaternary glaciers in this region. Prof. Li Jijun ever named it as Rongbacha Ice Age. There is a relatively integrated glacier sequence from the Penultimate Glaciation to the Neoglaciation. Here, the technique of Electron Spin Resonance(ESR)is used to date the samples collected from this region. They formed at about 5.6 ka BP, the time between the Neoglaciation and the Last Glaciation Maximum, 16.3 ka BP, 18.7 ka BP, 43.7 ka BP and the Penultimate Glaciation, respectively. Thermoluminescent(TL)dating suggests the loess, which lies on the riverside terraces of the Yalong Rivre in Garz?, deposited from the early Last Glaciation. Besides, combining with the synthetical analysis on the proxies of the loess-paleosol sequence in Garz?, we can find that the glacier tills and the loess-paleosol in the Garz? almost deposited simultaneously. This indicates that they have been controlled by the same climate system since at least the last interglacial. At the Last Glaciation Maximum, the glacial tills in Rongbacha experienced a strike changing of nearly 90°, which was intimately related to the extremely arid and frigid climate at that time. In the interstadial of Last Glaciation, corresponding to MIS(marine isotope state)3b, the glacier scale in Rongbacha even exceeded that of the last Glaciation Maximum.

Key words: Rongbacha Glaciers, the Hengduan Mountains, ESR dating, loess deposition

中图分类号:

P534.63

许刘兵, 周尚哲, 李昌爱, 崔建新, 赵井东, 业渝光. 甘孜绒坝岔古冰川演化与黄土古土壤对比研究[J]. 冰川冻土, 2003, 25(5): 504-509.

XU Liu-bing, ZHOU Shang-zhe, LI Chang-ai, CUI Jian-xin, ZHAO Jing-dong, YE Yu-guang. The Quaternary Glaciation in Rongbacha and Correlation with the Loess-Paleosol in Garz?[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2003, 25(5): 504-509.

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