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学科主题: 地球科学::地质学
题名: Miocene high-elevation landscape of the eastern Tibetan Plateau
作者: Xu, Q (Xu, Qiang)1, 2; Liu, XH (Liu, Xiaohui)1, 2, 3; Ding, L (Ding, Lin)1, 2
通讯作者: Xu, Q
关键词: LOWER CRUSTAL FLOW ; LONGMEN SHAN ; ASIAN MONSOON ; WENCHUAN EARTHQUAKE ; PALEOSOL CARBONATE ; QIANGTANG TERRANE ; SOUTHWEST CHINA ; STABLE-ISOTOPES ; SICHUAN BASIN ; MARGIN
刊名: GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
发表日期: 2016
DOI: 10.1002/2016GC006437
卷: 17, 期:10, 页:4254-4267
收录类别: SCI
合作性质: 国内
文章类型: Article
部门归属: 碰撞与隆升
英文摘要: The high topography of central Asia is the most distinctive expression of the India-Asia collision, yet a broad understanding of the timing and processes involved in the development of the Tibetan Plateau remains elusive. Here we investigate the Neogene Songpan Basin located on the eastern margin of the plateau using oxygen isotope paleoaltimetry to determine when the steep Longmen Shan margin obtained its present elevations. Hydrologically open lacustrine and fluvial-alluvial authigenic carbonates from the basin record the paleoelevations of the eastern Tibetan Plateau and suggest that the area has attained near-present elevations of similar to 3000 m by the late Miocene. This reconstruction is consistent with the results from the comparison of pollen fossils to their nearest living relatives in this area (2750-3050 m). We propose that the eastern Tibetan Plateau may have attained significant elevations prior to the late Miocene through an uplift scenario involving eastward growth of the plateau between the Eocene and the Miocene. Two tectonic processes, either crustal shortening in the Oligocene-Miocene or eastward propagation of weakened lower crust starting in the Eocene, most likely thickened the crust and raised the surface of the eastern Tibetan Plateau to its present elevation by the late Miocene.
语种: 英语
WOS记录号: WOS:000388694600025
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7539
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China

Recommended Citation:
Xu, Q ,Liu, XH ,Ding, L . Miocene high-elevation landscape of the eastern Tibetan Plateau[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2016,17(10):4254-4267.
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