| 理县黄土地层与环境记录 |
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| 引用本文： | 王书兵,蒋复初,田国强.理县黄土地层与环境记录[J].海洋地质与第四纪地质,2006,26(3):115-119. |
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| 作者姓名： | 王书兵 蒋复初 田国强 |
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| 作者单位： | 1. 中国地质科学院,地质力学研究所,北京,100081
2. 中国地质科学院,地质力学研究所,北京,100081;中国科学院,湖泊沉积与环境开放实验室,南京,210008 |
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| 基金项目： | 国家自然科学基金重点项目(90211019)，国土资源部基础研究项目(20010202、991005)，中国地质调查局地质调查项目(200312300034) |
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| 摘 要： | 理县黄土堆积厚度为7.30 m,可分为S0、S1古土壤层和L1黄土层。光释光结果显示,理县黄土沉积始于末次间冰期,约130 kaBP。磁化率、粒度、碳酸盐含量等经典气候替代指标分析表明,它们可以反映青藏高原东部气候环境变迁。环境记录显示,末次冰期间冰阶(即氧同位素3阶段)期间该区呈现出极端冷湿的气候环境。理县地区气候演化更接近于印度季风强度记录的变化,而与格陵兰冰心和深海氧同位素记录相似性稍差。
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| 关 键 词： | 环境记录 黄土地层 理县 川西高原 |
| 文章编号： | 0256-1492(2006)03-0115-05 |
| 修稿时间： | 2005年10月29 |
LOESS STRATIGRAPHY AND ENVIRONMENT RECORDS IN LIXIAN COUNTY,SICHUAN PROVINCE |
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| WANG Shu-bing,JIANG Fu-chu,TIAN Guo-qiang.LOESS STRATIGRAPHY AND ENVIRONMENT RECORDS IN LIXIAN COUNTY,SICHUAN PROVINCE[J].Marine Geology & Quaternary Geology,2006,26(3):115-119. |
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| Authors: | WANG Shu-bing JIANG Fu-chu TIAN Guo-qiang |
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| Abstract: | The loess accumulation consists of paleosol S0 and S1 and loess L1 in Lixian County,Sichuan Province,whose thickness is 7.30 m.According to OSL dating results,geological survey and magnetic susceptibility characters,the loess accumulation originated from the last glaciation since 130 kaBP.Through some analyses of classical climatic substitute indexes such as magnetic susceptibility,grain size and CaCO_3 content,it is revealed that they can still reflect the environmental and climatic changes in the east of Qinghai-Tibet Plateau.Environmental records show that in that area the environment was extremely cold and wet during the interstage of the last glaciation(deep sea oxygen isotope stage 3).The environmental variations in Lixian County are close to Indian monsoon records in intensity changes,but its similarity to the Greenland Ice Core and deepsea oxygen isotope records is slightly lower. |
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| Keywords: | environmental records loess stratigraphy Lixian County west Sichuan Plateau |
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