Soft-sediment deformation structures from the Diexi paleo-dammed lakes in the upper reaches of the Minjiang River, east Tibet

Wang, Ping; Zhang, Bin; Qiu, Wei-Li; Jian-cun, Wang

doi:10.1016/j.jseaes.2010.04.006

Cited by 61 publications

(40 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Diaolin paleolake was formed by a landslide associated with a strong regional earthquake, which blocked the Minjiang River, as inferred from the presence of poorly sorted, weathered phyllite at the bottom of the lacustrine sequence, the onset of deposition, and the historical record of regional earthquakes (Sun et al 2010;Wang et al 2011;Jiang et al 2014;Xu et al 2015). A depositional hiatus and/ or condensed section occurred in the Diaolin paleolake between 917 and 1004 C.E.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Decadal- to centennial-scale East Asian summer monsoon variability during the Medieval Climate Anomaly reconstructed from an eastern Tibet lacustrine sequence

Jiang

Shevenell

et al. 2015

J Paleolimnol

View full text Add to dashboard Cite

Instrumental data suggest changes in the intensity of the East Asian Monsoon system over the past century, possibly in response to anthropogenic climate change. To understand modern observations and explore past variations in East Asian summer monsoon (EASM) strength, we conducted grain size, geochemical, and pollen assemblage studies on a lacustrine sediment sequence from an earthquakedammed paleolake on the eastern Tibetan Plateau. The chronology, generated from eight optically stimulated luminescence and two pollen concentrate radiocarbon dates, indicates deposition of the lacustrine sequence between 600 and 1250 C.E. Fine grain sizes and low arboreal pollen percentages are associated with regional aridity (790-916, 1020-1080, 1125-1150 C.E.) and a weak EASM, whereas coarser grain sizes and higher arboreal pollen percentages are associated with increased precipitation and a stronger EASM (1090-1125, 1160-1230 C.E.). Although observed variations in our paleodata are predominantly driven by climate, the sequence is also influenced by regional tectonics, as evident from seismites, a *90-year hiatus (917-1004 C.E.) during a period of regional seismicity, and an abrupt increase in regional sedimentation rates. Human disturbance is also observed to increase during weak EASM intervals. On decadal to millennial scales, our paleodata are highly correlated with reconstructions of EASM strength from northeastern China and sea surface temperature reconstructions from the tropical Pacific Ocean, indicating that the Medieval Climate Anomaly was associated with a strong EASM and prolonged La Niña-like state. Our data also suggest decadal-scale EASM variability associated with solar intensity, but an inconsistent response suggests additional complexity in EASM forcing. The inverse relationship between modern EASM weakening with anthropogenic warming, and a strong EASM during the warm Medieval Climate Anomaly, suggests that the complexity of the decadal to centennial-scale EASM response may be related to changes in the mean state of the tropical Pacific Ocean.

show abstract

Section: Discussionmentioning

confidence: 99%

“…There is strong regional vegetation zonation with altitude, characterized by broadleaf and subalpine coniferous forests, arid valley shrubs, and subalpine meadows (Zhang et al 2007). Earthquake-induced landslides often destroy regional vegetation (Dai et al 2011;Wang et al 2011;Xu et al 2014). …”

Section: Study Sitementioning

confidence: 99%

Decadal- to centennial-scale East Asian summer monsoon variability during the Medieval Climate Anomaly reconstructed from an eastern Tibet lacustrine sequence

Jiang

Shevenell

et al. 2015

J Paleolimnol

View full text Add to dashboard Cite

show abstract

“…The seismically-induced soft-sediment deformation structures provide new substantial evidence for the existence of active tectonics and paleo-earthquakes in this area during the Holocene [52][53][54].…”

Section: Discussionmentioning

confidence: 99%

Origins of Soft-Sediment Deformation Structures from the Batang Paleodammed Lakes in the Upper Jinsha River, SE Tibetan Plateau

Teng¹,

Chen²,

Cui³

et al. 2017

J Geol Geophys

View full text Add to dashboard Cite

Multiple levels of preserved soft-sediment deformation structures occur in sediments deposited in the paleodammed lakes in the Batang-Zhongza reaches of the upper Jinsha River Valley, southeast Tibetan Plateau. These deformation structures include folded layers, convoluted layers, ball-and-pillow structures, recumbent lamination, waterescape structures, and small-scale landslide. Combining the assessments of depositional facies, potential triggers, paleoenvironmental context, we conclude that the probable trigger agents of this deformation were earthquakes, slides, and debris flows. The seismically-induced soft-sediment deformation structures provide new substantial evidence for the existence of active tectonics and paleo-earthquakes in the Batang area since the Holocene.

show abstract

“…For example, the 1933 Diexi earthquake (whose epicentre was located less than 10 km far from Xinmo) has caused about 6800 fatalities directly from the earthquake-triggered landslides and 8000 fatalities from the associated formation of 12 landslide dams (Chang 1934;Dai et al 2005;Huang 2009). Eight landslide dams remain today and analyses on the preserved soft-sediment deformation structures reveal that their potential causes are earthquakes and the derived landslides (Wang et al 2011). In addition, the landslides triggered by the 2008 Wenchuan earthquake have brought about 20,000 deaths from 15,000 events and left more than 10,000 potential hazardous sites and 256 landslide dams in this area (Cui et al 2009;Wang et al 2013;Xu et al 2009;Yin et al 2009).…”

Section: Description Of the Maoxian Landslidementioning

confidence: 99%

The Maoxian landslide as seen from space: detecting precursors of failure with Sentinel-1 data

Intrieri

Raspini

Fumagalli³

et al. 2017

Landslides

322

158

View full text Add to dashboard Cite

show abstract

Soft-sediment deformation structures from the Diexi paleo-dammed lakes in the upper reaches of the Minjiang River, east Tibet

Cited by 61 publications

References 15 publications

Decadal- to centennial-scale East Asian summer monsoon variability during the Medieval Climate Anomaly reconstructed from an eastern Tibet lacustrine sequence

Decadal- to centennial-scale East Asian summer monsoon variability during the Medieval Climate Anomaly reconstructed from an eastern Tibet lacustrine sequence

Origins of Soft-Sediment Deformation Structures from the Batang Paleodammed Lakes in the Upper Jinsha River, SE Tibetan Plateau

The Maoxian landslide as seen from space: detecting precursors of failure with Sentinel-1 data

Contact Info

Product

Resources

About