A 2-Myr seismite record (3.6-1.6 Ma) from the western Qaidam Basin, NE Tibet

doi:doi:10.1594/PANGAEA.922852

A 2-Myr seismite record (3.6-1.6 Ma) from the western Qaidam Basin, NE Tibet

As part of a joint Sino‐German (SG) project, the 723‐m‐deep core SG‐1b (38°21′9.46″N, 92°16′24.72″E) has been drilled from the crest of the Jianshan Anticline, western Qaidam Basin, NE Tibet during 2011. In this study, we focus on the core interval between ~260 and 0 m, which was dated at ~3.6-1.6 Ma. We identify the micro-faults, soft-sediment deformation, slump, and detachment surface in the core as paleoearthquake/tectonics indicators. The core records 164 seismites and five seismite clusters which occurred at 3.61-3.49 Ma, 3.39-3.19 Ma, 3.16-3.09 Ma, 3.00-2.91 Ma, and 2.81-2.75 Ma, suggesting the rate to tectonic strain release by the folds and thrusts in the western Qaidam Basin vary between 3.6 and 2.7 Ma and thus revealing episodic regional deformation.

BibTex:

@dataset{Lu_Yin_and_Marco_Shmuel_and_Wetzler_Nadav_and_Fang_Xiaomin_and_Alsop_Ian_G_and_Hubert-Ferrari_Aurélia_2020,
    abstract = {As part of a joint Sino‐German (SG) project, the 723‐m‐deep core SG‐1b (38°21′9.46″N, 92°16′24.72″E) has been drilled from the crest of the Jianshan Anticline, western Qaidam Basin, NE Tibet during 2011. In this study, we focus on the core interval between ~260 and 0 m, which was dated at ~3.6-1.6 Ma. We identify the micro-faults, soft-sediment deformation, slump, and detachment surface in the core as paleoearthquake/tectonics indicators. The core records 164 seismites and five seismite clusters which occurred at 3.61-3.49 Ma, 3.39-3.19 Ma, 3.16-3.09 Ma, 3.00-2.91 Ma, and 2.81-2.75 Ma, suggesting the rate to tectonic strain release by the folds and thrusts in the western Qaidam Basin vary between 3.6 and 2.7 Ma and thus revealing episodic regional deformation.},
    author = {Lu, Yin and Marco, Shmuel and Wetzler, Nadav and Fang, Xiaomin and Alsop, Ian G and Hubert-Ferrari, Aurélia},
    doi = {10.1594/PANGAEA.922852},
    institution = {PANGAEA (Lithosphere)},
    keyword = {'Late Pliocene', 'NE Tibet', 'Qaidam Basin', 'detachment surface', 'faults', 'folds', 'micro', 'paleoseismology', 'regional deformation', 'sediment deformation', 'seismites', 'slump', 'soft', 'thrusts'},
    title = {A 2-Myr seismite record (3.6-1.6 Ma) from the western Qaidam Basin, NE Tibet},
    url = {https://service.tib.eu/ldmservice/vdataset/png-doi-10-1594-pangaea-922852},
    year = {2020}
}