Intensified tectonic deformation and uplift of the Altyn Tagh range recorded by rock magnetism and growth strata studies of the western Qaidam Basin, NE Tibetan Plateau

Zuyi, Tao; Han, Wenxia; Fang, Xiaomin; Zhang, Weilin; Song, Chunhui; Yan, Maodu

doi:10.1016/j.gloplacha.2015.12.017

Cited by 41 publications

(26 citation statements)

References 93 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This suggests that these two anticlines were initiated and grew rapidly and continuously since ~10 Ma. Previous studies also indicated that the QB and the surrounding region, and even the northeastern TP, experienced intensive tectonic uplift at ~10 Ma (e.g., Duvall et al, ; Fang et al, ; Ji et al, ; Jolivet et al, ; Molnar et al, ; Zhang et al, ). The growth strata also indicate that the main formation time of the Nanyishan anticline was coeval with the QGQ Fm.…”

Section: Discussionmentioning

confidence: 96%

“…The Qaidam Basin (QB), in the northeastern Tibetan Plateau (NE TP), is well suited to such a study for the following reasons: (1) It is in the transitional zone between the arid Asian interior and the East Asian Monsoon region, and it experienced four high‐amplitude climatic regimes during the Cenozoic: warm‐humid, cold‐dry, warm‐humid, and colder‐drier during 53.5–40.5, 40.5–22, 22–18, and 18 Ma to present, respectively (Bao et al, ; Jian et al, ; Li et al, ; Miao et al, , ; Song et al, ; Wang et al, ; Zhuang et al, , and references within; Guo et al, ). (2) It experienced major deformation during the Cenozoic, accompanied by the uplift of the surrounding mountains to the current average elevation of over ~4,000 m (e.g., Chang et al, ; Cheng et al, ; Fang et al, ; Ji et al, ; Lu & Xiong, ; Mao et al, ; Wu et al, ; Yin et al, ; Yin, Dang, Wang, et al, ; Yin, Dang, Zhang, et al, ; Zhang et al, ; Zhou et al, ). (3) It was completely enclosed from the Eocene to the Oligocene and has accumulated more than 6 km of Cenozoic nonmarine sediments (Gu et al, ; Hanson et al, ; Métivier et al, ; Wang et al, ; Xia et al, ) which are an archive of information on the tectonic setting of the potential provenance and source rock lithology, local, and regional climate change and the evolution of the depositional environment in the QB.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tectonic Control of a Change in Sedimentary Environment at ~10 Ma in the Northeastern Tibetan Plateau

Zuyi

Han

Fang

et al. 2018

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

Tectonic uplift and climate change play a key role in the evolution of sedimentary systems in terrestrial basins. The Qaidam Basin in the northeastern Tibetan Plateau is well suited for studying these processes because of its location and its thick, continuous sequence of Cenozoic sediments. Unfortunately, however, there is a lack of continuous, well‐dated sedimentary records from the region. In the present study, we combined grain‐size analyses of sediment cores and outcrop samples with structural analysis of seismostratigraphic data from the western Qaidam Basin. The results reveal dramatic shifts in the depositional environment at ~11.5–10 Ma, coeval with the topographic development of the area. Together with paleoclimatic analysis and a conceptual model, we conclude that tectonic movements, rather than climatic changes, were the dominant forcing factor.

show abstract

Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Tectonic Control of a Change in Sedimentary Environment at ~10 Ma in the Northeastern Tibetan Plateau

Zuyi

Han

Fang

et al. 2018

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…More paleomagnetic results from the other parts of the AK anticline will be helpful in testing the mechanisms. However, few Neogene sediments are exposed in the other part of the AK anticline due to its rapid uplift [ Jolivet et al ., , ; Wang et al ., ; Chen et al ., ; Zhang et al ., ]. Additionally, the well‐exposed Middle Jurassic sediments in the interior of the AK anticline have not provided any helpful paleomagnetic directions [ Chen et al ., ; this study].…”

Section: Discussionmentioning

confidence: 99%

New paleomagnetic constraints on middle Miocene strike‐slip faulting along the middle Altyn Tagh Fault

Yan

Zhang

et al. 2017

JGR Solid Earth

Self Cite

View full text Add to dashboard Cite

Knowledge of the evolution of the Altyn Tagh Fault (ATF) has significant implications for our understanding of the tectonic deformation of the Tibetan Plateau. Controversy exists regarding the formation of the orocline‐like arcuate structures or curved thrust faults south of the ATF. In this paper, we conducted a paleomagnetic rotation study of the Akatengnengshan (AK) and Youshashan (YSS) anticlines to determine whether the changes in the anticlines' axes were caused by frictional drag associated with sinistral strike‐slip faulting along the ATF. No significant paleomagnetic rotations during the last 20 Ma were observed at the Xichagou and Laomangai localities, which are situated along the YSS anticline, whereas significant counterclockwise (CCW) rotations of ~50° that occurred between ~16.2 and 11.1 Ma were noted at the Yitunbulake locality, which lies along the western edge of the AK anticline. This amount of CCW rotation is consistent with the difference in axes between the AK and YSS anticlines. Combined with other geological evidence, we believe that the middle ATF was active between ~16 and 11 Ma. Frictional drag associated with sinistral strike‐slip motion likely resulted in the ~50° CCW rotation of the AK anticline, which was originally straight or parallel to the YSS anticline. There was concentrated or insignificant strike‐slip faulting along the middle ATF before ~16 Ma, but rapid and distributed (< 40 km) strike‐slip faulting occurred between ~16 and 11 Ma at a rate of ≥10 mm/yr, and the minimum displacement was ~50 km.

show abstract

“…Many studies have been conducted on the magnetic properties of Neogene fluvial‐lacustrine sediments in the NE TP (Fang et al, , ; Fu et al, ; Jiang et al, ; Xiao et al, ; Zan, Fang, Yan, et al, ; T. Zhang et al, ). The results demonstrate that the magnetic susceptibility of fluvial‐lacustrine sediments from the main sedimentary basins generally shows a rapid increase since the late Miocene.…”

Section: Introductionmentioning

confidence: 99%

“…For example, a rock magnetic investigation of late Cenozoic fluvial‐lacustrine sediments (spanning 17–5 Ma) from the western Qaidam Basin indicated that the rapid increase in magnetic susceptibility after ~11 Ma was caused by the increased influx of coarser‐grained clastic sediments associated with the intensified tectonic deformation and uplift of the Altyn Tagh range (T. Zhang et al, ). A change of source materials caused by the deformation and uplift of the NE TP was also presumed responsible for the magnetic enhancement (~8.6 Ma) of late Miocene eolian Red Clay and intercalated fluviolacustrine deposits in the Jianzha Basin (Fu et al, ).…”

Section: Introductionmentioning

confidence: 99%

A Pedogenic Model for the Magnetic Enhancement of Late Miocene Fluvial‐Lacustrine Sediments From the Xining Basin, NE Tibetan Plateau

et al. 2018

Self Cite

View full text Add to dashboard Cite

Continuous sequences of Cenozoic fluvial‐lacustrine sediments are well preserved in the northeastern edge of the Tibetan Plateau (TP), and they provide a good opportunity to improve our understanding of the tectonic uplift and paleoenvironmental evolution of the NE TP. To date, however, the factors controlling the variations in the magnetic properties of these fluvial‐lacustrine sediments remain complex and ambiguous. Here we systematically assess the contribution of pedogenesis to the magnetic enhancement of late Miocene fluvial‐lacustrine sediments in the Xining Basin, using a combination of rock magnetic, diffuse reflectance spectroscopy, and geochemical methods. Our results demonstrate that the magnetic concentration parameters show a long‐term increasing trend since the late Miocene, with two dramatic increases at ~11 and 9 Ma. Based on the examination of several factors that may affect the magnetic properties of fluvial‐lacustrine sediments in the NE TP, we argue that an accelerated drying process in waterlogged environments, induced by late Miocene global cooling or/and tectonic uplift, may have caused the changes from anaerobic to aerobic conditions and resulted in the observed stepwise increases in pedogenic intensity. The two dramatic increases in magnetic parameters are closely related to intensified aridification and tectonic activity in the NE TP at ~11 and 9 Ma, respectively. These observations suggest that the pedogenic magnetic enhancement model, caused by the disappearance of a waterlogged and reducing pedogenic environment since the late Miocene, should be reconsidered as a possible factor explaining the magnetic properties of fluvial‐lacustrine sediments in the NE TP.

show abstract

Intensified tectonic deformation and uplift of the Altyn Tagh range recorded by rock magnetism and growth strata studies of the western Qaidam Basin, NE Tibetan Plateau

Cited by 41 publications

References 93 publications

Tectonic Control of a Change in Sedimentary Environment at ~10 Ma in the Northeastern Tibetan Plateau

Tectonic Control of a Change in Sedimentary Environment at ~10 Ma in the Northeastern Tibetan Plateau

New paleomagnetic constraints on middle Miocene strike‐slip faulting along the middle Altyn Tagh Fault

A Pedogenic Model for the Magnetic Enhancement of Late Miocene Fluvial‐Lacustrine Sediments From the Xining Basin, NE Tibetan Plateau

Contact Info

Product

Resources

About