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Paleoclimate reconstruction of Middle Permian in Hami Basin, Xinjiang: evidence from the fossil wood growth rings

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doi: 10.3799/dqkx.2016.525
Authors:Wei Xinxiang; Zhang Xionghua; Huang Xing; Luan Tengfei
Author Affiliations:Primary:
China University of Geosciences, Faculty of Earth Sciences, Wuhan, China
Volume Title:Earth Science. Journal of China University of Geoscience
Source:Earth Science. Journal of China University of Geoscience, 41(10), p.1771-1780. Publisher: China University of Geoscience, Wuhan, China. ISSN: 1000-2383
Publication Date:2016
Note:In Chinese with English summary. 37 refs.; illus., incl. sects., 1 table, sketch map
Summary:The collection of fossil wood growth ring data is helpful for reconstructing the paleoclimate. Based on the statistical analysis of fossil wood growth rings from the Middle Permian Taerlang Formation in the northeast edge of the Hami Basin, the paleoclimate evolution of the Middle Permian is reconstructed for the first time. An analysis of fossil wood growth rings shows that this area was under a northern subtropical climate with obvious seasonal variations during the Middle Permian. The paleoclimate was relatively warm, but intermittent hot climates did occur. The low percentage of latewood and the abrupt transition between earlywood and latewood in some growth rings indicate that seasonal variations were very obvious during the trees' growth period. The paleoclimate was prevailed by a subtropical monsoon climate with hot humid summers and dry cold winters. The relatively high mean sensitivity (MSaverage of 0.4) of fossil woods indicates that trees were influenced by a monsoon climate during the growth period, and the environment was very unstable with uneven annual precipitation. The change in the consecutive growth ring width and the existence of false rings implies that the climate changed frequently and was generally humid with arid and semi-arid fluctuations.
Subjects:Fossil wood; Humid environment; Middle Permian; Paleoclimatology; Paleoecology; Paleozoic; Permian; Reconstruction; Subtropical environment; Terrestrial environment; Tree rings; Asia; China; Far East; Hami Basin; Xinjiang China; Taerlang Formation
Coordinates:N420000 N430000 E0950000 E0930000
Record ID:821860-12
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute.
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