130 ka B.P.前后黄土高原东部地区的气候侵蚀事件
文献类型：期刊论文
| 作者 | 周杰1,4; 张信宝1,2 ; 陈惠忠1,3; 孙东怀1; 薛祥煦4
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| 刊名 | 中国沙漠
 |
| 出版日期 | 1998 |
| 卷号 | 18期号:2页码:105-110 |
| 关键词 | 黄土高原 季风 气候过渡期 侵蚀事件 |
| ISSN号 | 1000-694X |
| 其他题名 | CLIMATIC EROSION EVENT OCCURRED IN THE EASTERN LOESS PLATEAU AT ABOUT 130 ka B.P. |
| 通讯作者 | 周杰 |
| 合作状况 | 国内 |
| 中文摘要 | 通过黄土高原塬区、梁峁区和断陷谷区典型沟谷的阶地堆积、侵蚀面及其与之相邻的黄土—古土壤地层序列研究，并结合古气候特征分析，提出倒数第二次冰期冬季风向末次间冰期夏季风过渡期黄土高原东部地区发生了强烈的气候侵蚀事件。沉积物特征研究和古气候复原结果表明，此次侵蚀是一次以暴雨为主要动力的快速侵蚀事件。 |
| 英文摘要 | By the study on the terrace depo sit s, ero sional su rface and the neighbou ring loess2paleo so l sequences f rom differen t ero sion p rof iles located in f lat2land and h ill2land as w ell as valley rigion s of Loess P lateau, and link ing to the analysis of p roxy indices of paleo2 climate, th ree resu lt s are concluded: (1) Thew ell developed T 3 terraces of the gu llies in f lat2land, h ill2land and valley rigion s of eastern Loess P lateau, and their iden t ical depo sit featu resw h ich include sand2gravel, sub2 clay and f luvial loess layers indicate that they are obviou sly the relevan t sedimen t s du ring the st rong ero sion period. Comparing st rat igraphy w ith TL dat ing resu lt s, it can be determ ined that S1 paleo so ls fo rmed in the in terglacial period draped over the above gu lly terraces. Th is imp lied that the ero sion even t occu rred at abou t 130 ka B. P. befo re the S1 paleo so ls devel2 oped. (2) The analysis of climat ic p roxy indices such asmagnet ic2su scep t ib ility, D13C and vari2 ab ility of magnet ic2su scep t ib ility revealled a greater climat ic gradien t o r greater p recip itat ion variab ility at abou t 130 ka B. P. , w h ich show ed, on one hand, the p recip itat ion increased sharp ly, on the o ther hand, the p recip itat ion con t ribu t ion w ith t ime w as rather uneven. These p rovided a favou rab le driving condit ion fo r large scale land su rface ero sion. The D13C value increasing smoo th ly, and magnet ic2su scep t ib ility rising sharp ly indicated that, even though p recip itat ion sudden ly increased, the vegetat ion w as no t recovered comp letely yet. These p rovided p rof itab le land su rface environmen tal condit ion fo r the large scale ero sion. Due to the above two facto rs, the eastern Loess P lateau occu rred a vio len t climat ic ero sion even t at abou t 130 ka B. P. befo re the S1 paleo so ls developed. (3) The depo sit s of T3 terraces w ere sand m ixed w ith gravel. The too bad so rt ing im2 p lied that th is ero sion even t w as p robab ly drived by h igh in ten sity rain sto rm s. |
| 学科主题 | P512 |
| 分类号 | P512 |
| 收录类别 | 北大中文核心 |
| 资助信息 | 中国科学院“九五”重大项目 |
| 语种 | 中文 |
| 公开日期 | 2011-03-30 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/2884]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.中国科学院黄土与第四纪地质国家重点实验室 2.中国科学院水利部成都山地灾害与环境研究所 3.中国科学院兰州沙漠研究所 4.西北大学地质系 |
| 推荐引用方式 GB/T 7714 | 周杰,张信宝,陈惠忠,等. 130 ka B.P.前后黄土高原东部地区的气候侵蚀事件[J]. 中国沙漠,1998,18(2):105-110. |
| APA | 周杰,张信宝,陈惠忠,孙东怀,&薛祥煦.(1998).130 ka B.P.前后黄土高原东部地区的气候侵蚀事件.中国沙漠,18(2),105-110. |
| MLA | 周杰,et al."130 ka B.P.前后黄土高原东部地区的气候侵蚀事件".中国沙漠 18.2(1998):105-110. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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