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| 西宁地区第四纪晚期孢粉组合及古环境 | |
| 引用本文： | 赵淑君,王萍,苏旭,尹功明,程捷.西宁地区第四纪晚期孢粉组合及古环境[J].高原地震,2007,19(4):41-46. |
| 作者姓名： | 赵淑君 王萍 苏旭 尹功明 程捷 |
| 作者单位： | 1. 中国地震局地质研究所地震动力学国家重点实验室,北京,100029;中国地质大学(北京)北京,100083 2. 中国地震局地质研究所地震动力学国家重点实验室,北京,100029 3. 青海省地震局,青海,西宁,810000 4. 中国地质大学(北京)北京,100083 |
| 基金项目： | 《西宁市活断层探测与地震危险性评价项目》资助 |
| 摘 要： | 西宁地区位于黄土高原与青藏高原的接壤处,是环境和气候变迁的敏感地带。本文对西宁市北川河河谷地区黄土沉积的钻孔剖面进行了孢粉分析,获得了比较丰富的孢粉数据,结果呈现出以松、桦、蒿及藜等木本及草本植物花粉为主的孢粉组合。据各类植物花粉量在该剖面垂向上的明显变化,由下而上可划分为5个孢粉带。研究表明,该剖面的孢粉分析数据及资料不仅记录了75kaB.P以来大量的古地理及古环境的变迁,也揭示了西宁地区晚更新世以来古植被及古气候的演替及变化,其演变分别经历了5个阶段:第一阶段为森林型针叶林,反应了温爽轻湿的气候;第二阶段为针叶林,为温凉轻润的气候;第三阶段为针叶林夹稀树草原,属温和湿润夹温凉轻湿的气候;第四阶段为森林草原,反应了温凉轻爽的气候;第五阶段为针叶林,反应了温和湿润的气候。 |
| 关 键 词： | 西宁地区 第四纪晚期 孢粉组合 古环境 |
| 文章编号： | 1005-586X(2007)04-0041-06 |
| 修稿时间： | 2007年7月9日 |
PALYNOLOGICAL ASSEMBLAGES AND PALEOENVIRONMENT OF THE LATE QUATERNARY IN XINING AREA |
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| ZHAO Shu-jun,WANG Ping,SU Xu,YIN Gong-ming,CHENG Jie.PALYNOLOGICAL ASSEMBLAGES AND PALEOENVIRONMENT OF THE LATE QUATERNARY IN XINING AREA[J].Plateau Earthquake Research,2007,19(4):41-46. | |
| Authors: | ZHAO Shu-jun WANG Ping SU Xu YIN Gong-ming CHENG Jie |
| Abstract: | Xining is the capital of Qinghai province,and is located in the contiguous zone between the Qinghai-Xizang Plateau and the Loess Plateau,which is sensitive to the fluctuation of environment and climate.Through a bore section of loess sediment in the Beichuan valley of Xining city,the abundant sporo-pollen analysis data was obtained,which presents a palynological assemblage compounded mainly by the tree and herb pollens of Pinus,Betula,Artemisia and Chenopidiaceae,etc..And according to the palynological assemblage five sporo-pollen zones were distinguished from bottom to top.The study reveals that the evolvement of the paleoclimate and paleovegetation has experienced the following five stages: the first stage is coniferous forest,indicating a mild and a little wet climate;the second is coniferous forest,reflecting a slightly cool and a little moist climate;the third is coniferous forest within a period of few trees grassland ,reflecting a climate that is slightly wet within a period of slightly cool and a little moist;the forth is forest grassland,indicating a cool and a little moist climate;the last stage is coniferous forest,reflecting a mild and wet climate. |
| Keywords: | Xining area Late Quaternary Palynological assemblage Paleoenvironment |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |