Late Pleistocene and Holocene loess sedimentation in central and western Qilian Shan (China) revealed by OSL dating

Zhang, Jingran; Nottebaum, Veit; Tsukamoto, Sumiko; Lehmkuhl, Frank; Frechen, Manfred

doi:10.1016/j.quaint.2014.12.054

Cited by 35 publications

(24 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recent studies of loess deposits near the Yumu Shan Zhang et al, 2015) also show that loess deposits are usually thinner than 3 m, and OSL dating on the loess sections mostly yields Holocene ages. Based on this evidence, it is argued that the loess accumulation in the western and central Qilian Shan was initiated ca.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Folded fluvial terraces in a young, actively deforming intramontane basin between the Yumu Shan and the Qilian Shan mountains, NE Tibet

Pan

Fan

et al. 2017

Lithosphere

View full text Add to dashboard Cite

Intramontane basins in actively deforming regions contain significant information about the evolution of orogenic belts. We explored the tectonic characteristics and evolution of an intramontane basin between the Qilian Shan and Yumu Shan mountains on the NE Tibetan Plateau. We utilized the deformation of fluvial terraces along the Dahe River to constrain the rate and pattern of Quaternary deformation across the basin. Fluvial landforms include a widespread Mid-Pleistocene alluvial-fluvial fan surface and five terrace levels inset below this surface. We dated deposits associated with these landforms by optically stimulated luminescence (OSL) analyses on eolian loess and fluvial sediments. Our results yield ages of 142.8 ± 11.3 ka (Fs), 103-125 ka (T5), 96-115 ka (T4), 87-104 ka (T3), and 13-15 ka (T2), which we interpret to reflect the abandonment of fluvial terrace surfaces. Elevation surveys indicate that the terrace surfaces are folded along the Dahe anticline and are gently tilted northward across the basin. Analysis of terrace deformation suggests that the Dahe anticline grew by limb rotation and accommodated upper-crustal shortening at a rate of 0.14 +0.14/−0.03 mm/a. We determined the onset of deformation to have occurred between 0.3 and 0.9 Ma, based on the rotation rate of the southern limb of the anticline. This age is significantly younger than the onset ages of the thrust faults along the Qilian Shan (ca. 10 Ma) and the Yumu Shan (ca. 3.7 Ma). The character of the terrace deformation suggests that the Dahe anticline was growing from a south-dipping décollement, which also induced surface tilting across the entire basin. The Late Quaternary activation of the Dahe anticline folding and the detachment slipping provide evidence that the deformation of the intramontane basin occurred much later than that of the surrounding mountain ranges and accommodated part of the crustal shortening through basin narrowing.

show abstract

Section: Methodsmentioning

confidence: 99%

“…4). According to the relatively thick loess accumulation on the Dahe terraces and the previous loess studies in the Qilian Shan (Pan et al, 2013a;Zhang et al, 2015), we choose the method of OSL dating of the loess and fluvial deposits to constrain the age of the fluvial terrace.…”

Section: Methodsmentioning

confidence: 99%

Folded fluvial terraces in a young, actively deforming intramontane basin between the Yumu Shan and the Qilian Shan mountains, NE Tibet

Pan

Fan

et al. 2017

Lithosphere

View full text Add to dashboard Cite

show abstract

“…Synchronously, the climatic switch favored incision of alluvial fans, forming terraces (Shirahama et al, 2015) and decoupled large alluvial fan areas from fluvial geomorphic activity. On the one hand, this supported the virtually continuous accumulation of loess on the relatively stable terrace surfaces Zhang et al, 2015). On the other hand, it restricted fluvial activity to the incising channels and provided large sediment amounts to the lower areas.…”

Section: Sedimentological Record In the Central Hexi Corridormentioning

confidence: 83%

“…However, it may not represent a regional humid environmental pulse as it might also be caused by a shift in the Hei River course, occupying the area as its alluvial plain. The discrepancy between inferred stable conditions from loess and the dynamic character found in eastern Hexi Corridor's sand sections may be explained by considering the respective geomorphologic situations: the accumulation of loess on the Qilian Shan piedmont terraces started during the transition from the late glacial to Holocene (Küster et al, 2006;Zhang et al, 2015). It is attributed to the establishment of a vegetation cover supported by ameliorated climate conditions after the last glacial (Küster et al, 2006).…”

Section: Sedimentological Record In the Central Hexi Corridormentioning

confidence: 94%

Late Quaternary aeolian sand deposition sustained by fluvial reworking and sediment supply in the Hexi Corridor — An example from northern Chinese drylands

et al. 2015

Self Cite

View full text Add to dashboard Cite

“…For example, the Xining loess on the northeast TP (NETP), a stretch of the Chinese Loess Plateau (CLP), has a basal age of c. 2.0 Ma at an elevation of 2300 m a.s.l. 13-14 ka Kaiser et al 2010;Lu et al 2011;Liu et al 2012;Stauch et al 2012;Qiang et al 2013;Yu & Lai 2014;Zhang et al 2015a). and the loess-like Chendu clay, have a basal age of 0.8 Ma (Fang et al 1996;Yang et al 2010).…”

mentioning

confidence: 99%

Hebei loess section in the Anyemaqen Mountains, northeast Tibetan Plateau: a high‐resolution luminescence chronology

Chongyi

Sohbati

Murray

et al. 2018

Boreas

View full text Add to dashboard Cite

The extensive aeolian deposits of the Tibetan Plateau (TP) represent important environmental archives, recording information about the past interplay between the Asian monsoon and Westerlies and the link between dust accumulation and Quaternary glaciations. In the northeast TP, mantles of sandy loess form a distinct belt lying between 3500 and 4500 m a.s.l. on the east-facing slopes of the Anyemaqen Mountains. However, there is little chronological information about the loess deposits in this region. This study provides a detailed chronology for loess formation in the region using luminescence dating. A total of 29 samples were collected from an 8-m-thick homogeneous loess section at Hebei (HB) in order to date sand-sized (63-90 lm) quartz and K-feldspar fractions using optically stimulated luminescence (OSL) and infrared stimulated luminescence (IRSL and pIRIR) signals, respectively. The resulting quartz and feldspar ages are in good agreement over the last 40 ka; beyond this (i.e. D e >120 Gy), the quartz age is underestimated, and the pIRIR 170 feldspar ages are considered more reliable. The HB loess section records continuous environmental information from c. 50 to c. 30 ka, i.e. throughout Marine Isotope Stage (MIS) 3. Mass accumulation rates (MARs) varied considerably over this period with increased dust accumulation around c. 38 ka and afterc. 32 ka; in between, and at the beginning of MIS 3 (50-40 ka), the dust accumulation rate was 50% lower. Finally, the HB section also records a MIS 2 hiatus of c. 17 ka duration, probably resulting from deflation. This study implies that loess deposition on the TP is predominantly an interglacial/interstadial phenomenon and the TP may be deflating at the same time as the Chinese Loess Plateau is accumulating, at least during MIS 2.

show abstract

Late Pleistocene and Holocene loess sedimentation in central and western Qilian Shan (China) revealed by OSL dating

Cited by 35 publications

References 72 publications

Folded fluvial terraces in a young, actively deforming intramontane basin between the Yumu Shan and the Qilian Shan mountains, NE Tibet

Folded fluvial terraces in a young, actively deforming intramontane basin between the Yumu Shan and the Qilian Shan mountains, NE Tibet

Late Quaternary aeolian sand deposition sustained by fluvial reworking and sediment supply in the Hexi Corridor — An example from northern Chinese drylands

Hebei loess section in the Anyemaqen Mountains, northeast Tibetan Plateau: a high‐resolution luminescence chronology

Contact Info

Product

Resources

About