DOI: 10.1016/j.earscirev.2019.04.026
论文题名: Spatiotemporal patterns of the Late Quaternary deformation across the northern Chinese Tian Shan foreland
作者: Lu H. ; Li B. ; Wu D. ; Zhao J. ; Zheng X. ; Xiong J. ; Li Y.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 194 起始页码: 19
结束页码: 37
语种: 英语
中文关键词: Crustal shortening
; Foreland basin
; Late Quaternary
; Spatiotemporal pattern
; The Tian Shan
英文关键词: crustal deformation
; crustal shortening
; foreland basin
; Holocene
; paleoseismicity
; Pleistocene
; recurrence interval
; spatiotemporal analysis
; Tien Shan
英文摘要: The investigations of active deformation across a mountain foreland can provide important insights into the pattern and dynamics of deformation of an active orogenic belt. Here we focus on the spatiotemporal patterns of the Late Quaternary deformation along the north piedmont of the Chinese Tian Shan, a mountain range formed by the ongoing India-Asia collision. By using a terrace as the reference and applying the area-conservation method, the Holocene shortening rate of the Halaande anticline, a fold of the distal structure Belt III in the foreland, is estimated to 2.14 ± 0.24 mm/yr for the first time. Similarly, we re-calculate the Holocene shortening rates of the other anticlines of Belt II-III using the magnitude of shortening documented by river terraces and the terrace formation ages published previously. The summed Holocene (103-year timescale)shortening rates of individual anticlines along N–S transects are ~2–4 mm/yr, consistent with the Late Pleistocene (104-year timescale)shortening rate but about 2–6 times higher than the long-term (106-year timescale)average shortening rate of ~1 mm/yr during the past several million years. Together with the shortening rates of individual anticlines at the 103-year, 104-year, and 106-year scales, these observations imply that the deformation across the northern Chinese Tian Shan foreland has accelerated since at least Late Pleistocene. By summing the Late Quaternary rates of shortening in the southern Chinese Tian Shan foreland (4–5 mm/yr)and the intermontane basins in the hinterland of the Tian Shan (~2 mm/yr), the Late Quaternary rate of shortening across the Tian Shan range (between longitude 83°E and 87°E)amounts to ~9.0 ± 1.0 mm/yr, approximately matching the modern shortening rate of ~8 mm/yr derived from the GPS measurements. These results imply (i)that the deformation across the Tian Shan range and its foreland basins (between longitude 83°E and 87°E)could have not been changed significantly since at least Late Pleistocene; (ii)that, in the northern Chinese Tian Shan foreland, the recurrence interval of paleoseismic events during the past tens of thousands of years may be determined by a linear extrapolation of the Holocene or even geodetic rate of deformation. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165869
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory of Geographic Information Science of Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai, 200241, China; Institute of Eco-Chongming (IEC), East China Normal University, Shanghai, 200062, China; Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake Administration, Beijing, 100085, China; Institute of Geology, China Earthquake Administration, Beijing, 100029, China; Key Laboratory of Earth Surface Processes of Ministry of Education, Peking University, Beijing, 100871, China
Recommended Citation:
Lu H.,Li B.,Wu D.,et al. Spatiotemporal patterns of the Late Quaternary deformation across the northern Chinese Tian Shan foreland[J]. Earth Science Reviews,2019-01-01,194