干旱区生态环境知识资源中心(Arid): 青藏高原腹地温泉地区新生代生态环境演化与高原表面隆升过程分析

Arid

	青藏高原腹地温泉地区新生代生态环境演化与高原表面隆升过程分析
其他题名	Analysis of the evolution of the Cenozoic ecological environment and process of plateau surface uplift in the Wenquan area in the interior of the Qinghai-Tibet Plateau
	段志明 1; 李勇 2; 沈战武 1; 祝向平 1; 钟成全 3
ISSN	1000-3657
出版年	2007
卷号	34 期号:4 页码:688-696
中文摘要	采自青藏高原腹地温泉地区新生代地层中的孢粉组合资料表明：从古新世到早中新世．古植被由早期的针阔叶混交林-森林草原植被向晚期的疏林草原植被演化。古气候也由亚热带暖湿气候向温凉气候演化：从上新世到早更新世，阔叶树种明显减少，而草本植物显著增多，反映气候开始向干冷方向演化；而中更新世晚期以来，出现稀疏草原植被向荒漠草原植被的演化，最终塑造了现代以藜、蒿为主的荒漠草原植被环境。高原腹地生态环境变化揭示了青藏高原自古新世以来至少经历了3次具有生态环境意义的表面隆升事件：古新世一早渐新世沱沱河组冲积扇砾岩沉积以及孢粉组合分析表明，青藏高原在白垩纪末一古新世初已隆升至1000～1500m．高原地形可能是高原（高山）与盆地相间的地貌格局；早中新世五道梁组植被中亚热带成分的显著增高．可能与高原表面隆升诱发高原季风而导致气候湿润有关，推测高原已隆升至2000-2500m；而中更新世晚期以草本植物为主．反映高原植被已经发生了转型，高原已隆升至3000m以上。
英文摘要	The data of sporopollen assemblages collected from Cenozoic strata in the Wenquan area in the interior of the Qinghai-Tibet Plateau indicate that： from the Paleocene to early Miocene, paleovegetation evolved from mixed needleleaf and broadleaf forests-forest grassland vegetation in the early stage to veld vegetation in the late stage and the paleoclimate also evolved from the warm-wet subtropical climate to warm-cool one; from Pliocene to early Pleistocene, broadleaf trees were obviously reduced, while herbaceous plants increased markedly, reflecting that the climate began to evolve towards the dry-cold climate; and since the late part of the middle Pleistocene, the evolution from veld vegetation to desert grassland vegetation appeared, which finally molded an environment of modem desert grassland vegetation represented mainly by Chenopodiaceae and Artemisia. The change of the ecological environment in the interior of the Qinghai-Tibet Plateau reveals that the Qinghai-Tibet Plateau has undergone at least three uplift events with ecological-environmental significance since the Paleocene. Fanglomerate sediments and sporopollen assemblages in the Paleocene-early Oligocene Tuotuo River Formation indicate that： the Qinghai-Tibet Plateau had been uplifted to the altitudes of 1000-1500 m above sea level by the terminal Cretaceous-early Paleocene and the plateau landform might bave a framework of alternating high mountains and basins; the noticeable increase in subtropical components in the vegetation of the early Miocene Wudaoliang Formation might be related to the climatic wetness caused by plateau monsoons induced by the plateau surface uplift and it is inferred that the plateau had uplifted to 2000-2500 m above sea level. In the late part of the middle Pleistocene, herbaceous plants predominated, indicating that the type of plateau vegetation had changed and that the plateau has been uplifted to an altitude of more than 3000 m above sea level.
中文关键词	孢粉组合 ; 生态环境 ; 表面隆升 ; 新生代 ; 温泉地区
英文关键词	sporopollen assemblages ecological environment surface uplift Cenozoic Wenquan area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:2974519
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221752
作者单位	1.成都地质矿产研究所, 成都, 四川 610082, 中国; 2.成都理工大学, 成都, 四川 610059, 中国; 3.四川蜀西地质工程勘测院, 成都, 四川 611730, 中国
推荐引用方式 GB/T 7714	段志明,李勇,沈战武,等. 青藏高原腹地温泉地区新生代生态环境演化与高原表面隆升过程分析[J],2007,34(4):688-696.
APA	段志明,李勇,沈战武,祝向平,&钟成全.(2007).青藏高原腹地温泉地区新生代生态环境演化与高原表面隆升过程分析.,34(4),688-696.
MLA	段志明,et al."青藏高原腹地温泉地区新生代生态环境演化与高原表面隆升过程分析".34.4(2007):688-696.