The vegetation and climate change during Neocene and Early Quaternary in Jiuxi Basin, China

被引:77
作者
Ma, YZ [1 ]
Fang, XM
Li, JJ
Wu, FL
Zhang, J
机构
[1] Lanzhou Univ, Key Lab Wester Chinas Environm Syst, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Coll Resources & Environm, Lanzhou 730000, Peoples R China
[3] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
来源
SCIENCE IN CHINA SERIES D-EARTH SCIENCES | 2005年 / 48卷 / 05期
基金
中国国家自然科学基金;
关键词
Tibetan Plateau; Hexi Corridor; sporopollen record; ecological environment; vegetation evolution; aridification;
D O I
10.1360/03yd0110
中图分类号
P [天文学、地球科学];
学科分类号
07 [理学];
摘要
Sporopollen record in the Laojunmiao Section at Yumen in the Hexi Corridor foreland depression at the northern margin of the Tibetan Plateau revealed that during the period of 13.0-11.15 Ma the ecological environment of the Jiuxi Basin is characterized by steppe vegetation and a semi-moist climate. During 11.16-8.60 Ma prevailed forests of cypress and a still warmer, moister climate; steppe vegetation and dry climate began probably at about 8.6 Ma. Although aridification had been relaxed time and again during 8.40-6.93 Ma (forest-steppe, warm-semi-moist), 6.64-5.67 Ma (open-forest and steppe, warmer-semi-moist) and 5.42-4.96 Ma (steppe, semi-arid), the climate in the region became drier and drier in response to the frequent occurrence of aridity during 6.93-6.64 Ma (steppe, semi-arid), 5.67-5.42 Ma (desert-steppe, arid), 3.66-3.30 Ma (desert-steppe, arid) and 2.56-2.21 Ma (desert, arid). Perhaps the important findings of our study are the notable expansion of drought-enduring plants during 3.66-3.30 Ma and about 2.56 Ma and the replacement of vegetation by vast and desert.
引用
收藏
页码:676 / 688
页数:13
相关论文
共 41 条
[1]
Evolution of Asian monsoons and phased uplift of the Himalayan Tibetan plateau since Late Miocene times [J].
An, ZS ;
Kutzbach, JE ;
Prell, WL ;
Porter, SC .
NATURE, 2001, 411 (6833) :62-66
[2]
[Anonymous], EARLY TERTIARY SPORE
[3]
[Anonymous], 1999, QUATERNARY SCI
[4]
REVISED CALIBRATION OF THE GEOMAGNETIC POLARITY TIMESCALE FOR THE LATE CRETACEOUS AND CENOZOIC [J].
CANDE, SC ;
KENT, DV .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 1995, 100 (B4) :6093-6095
[5]
ECOLOGICAL SIGNIFICANCE OF COMMON NONARBOREAL POLLEN - EXAMPLES FROM DRYLANDS OF THE MIDDLE-EAST [J].
ELMOSLIMANY, AP .
REVIEW OF PALAEOBOTANY AND PALYNOLOGY, 1990, 64 (1-4) :343-350
[6]
ERDTMAN G, 1954, INTRO POLLEN ANAL, P129
[7]
Onset of Asian desertification by 22 Myr ago inferred from loess deposits in China [J].
Guo, ZT ;
Ruddiman, WF ;
Hao, QZ ;
Wu, HB ;
Qiao, YS ;
Zhu, RX ;
Peng, SZ ;
Wei, JJ ;
Yuan, BY ;
Liu, TS .
NATURE, 2002, 416 (6877) :159-163
[8]
Huang C. X., 1993, Arid Land Geography, V16, P75
[9]
JIN XC, 1995, OCEAN DRILLING PROGR
[10]
Li J.J., 1979, SCI CHINA, V6, P608