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Late Cenozoic Stratigraphy and Paleomagnetic Chronology of the Zanda Basin, Tibet, and Records of the Uplift of the Qinghai‐Tibet Plateau
Author(s) -
Xiangang MENG,
Dagang ZHU,
Zhaogang SHAO,
Chaobin YANG,
Jianen HAN,
Jia YU,
Qingwei MENG,
Rongping LU
Publication year - 2008
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2008.tb00325.x
Subject(s) - geology , cenozoic , plateau (mathematics) , paleontology , magnetostratigraphy , structural basin , tectonic uplift , glacial period , quaternary , chronology , paleomagnetism , stratigraphy , sedimentary rock , pleistocene , tectonics , early pleistocene , geomorphology , mathematical analysis , mathematics
Abstract: The characteristics of Late Cenozoic tectonic uplift of the southern margin of the Qinghai‐Tibet Plateau may be inferred from fluvio‐lacustrine strata in the Zanda basin, Ngari, Tibet. Magnetostratigraphic study shows that the very thick fluvio‐lacustrine strata in the basin are 5.89–0.78 Ma old and that their deposition persisted for 5.11 Ma, i.e. starting at the end of the Miocene and ending at the end of the early Pleistocene, with the Quaternary glacial stage starting in the area no later than 1.58 Ma. Analysis of the sedimentary environment indicates that the Zanda basin on the southern Qinghai‐Tibet Plateau began uplift at ∼5.89 Ma, later than the northern Qinghai‐Tibet Plateau. Presence of gravel beds in the Guge and Qangzê Formations reflects that strong uplift took place at ∼5.15 and ∼2.71 Ma, with the uplift peaking at ∼2.71 Ma.