A comparison of heavy mineral assemblage between the loess and the Red Clay sequences on the Chinese Loess Plateau

Peng, Wei; Wang, Zhao; Song, Yougui; Pfaff, Katharina; Luo, Zhi; Nie, Junsheng; Chen, Wenhan

doi:10.1016/j.aeolia.2016.02.004

Cited by 28 publications

(11 citation statements)

References 39 publications

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“…A recent zircon UePb study also suggests a subtle source change across this boundary (Nie et al, 2015). However, heavy mineral data from Peng et al (2016) and the lack of sediment source change shown here (Fig. 2) do not indicate a source change at the Plio-Pliestocene boundary.…”

Section: Loess Source Regionscontrasting

confidence: 44%

“…2) do not indicate a source change at the Plio-Pliestocene boundary. This means that either that the East Asian winter monsoon must also have been the main transport mechanism for the Red Clay (Peng et al, 2016), or that the westerlies transported material in the Pliocene from the same source, or a source with indistinguishable characteristics, such as that blown in by winter monsoon winds. This would be compatible with the evidence for a dominant NTP source for much of the CLP dust material (Fig.…”

Section: Loess Source Regionsmentioning

confidence: 99%

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A constant Chinese Loess Plateau dust source since the late Miocene

Bird

Millar

Rodenburg

et al. 2020

Quaternary Science Reviews

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The Pliocene-Pleistocene boundary marks a major change in global climate and East Asian monsoon dynamic. However, the role of the global atmospheric dust-cycle over this time is unclear; in particular the degree to which changes in the dust cycle influenced climate change, were driven by climate change, and how these processes interacted. Chinese loess records past dust-cycle history and the influences of aridification and monsoon circulation over the last 40 Ma. Previous work on the Chinese Loess Plateau argue over whether changes in dust source occur at the Pliocene-Pleistocene boundary, or at 1.2 Ma, despite these intervals marking major shifts in monsoon dynamics. We present Sr, Nd and Hf isotope data from multiple sites and show that dust source largely remains unchanged across these boundaries. Shifts in geochemistry are due to changes in grain-size and weathering. While the transport pathway (river, deserts, direct aeolian) is unclear, these tracer isotopes show that dust was dominantly sourced from the Northern Tibetan Plateau, with some input from the local bedrock. This shows that a major established and constant dust source on the Tibetan Plateau has been active and unchanged since late Miocene, despite dramatically changing climate conditions. Changes in loess accumulation are a function of climate change in Tibetan Plateau source regions rather than effects from increased aridification over the Pliocene-Pleistocene boundary.

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Section: Loess Source Regionscontrasting

confidence: 44%

Section: Loess Source Regionsmentioning

confidence: 99%

A constant Chinese Loess Plateau dust source since the late Miocene

Bird

Millar

Rodenburg

et al. 2020

Quaternary Science Reviews

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“…Some 19 different heavy minerals were identified, of which hornblende and pyroxene, unstable in fluvial bedload and post-depositional environments (e.g., Peng et al, 2016), and stable rutile, zircon, tourmaline, anatase, monazite, apatite, garnet, staurolite, ilmenite and magnetite appear in most of the samples. In contrast, pyroxene, anatase and pyrite were encountered in only a few samples.…”

Section: Heavy-mineral Analysis and Comparisonmentioning

confidence: 99%

Fluvial entrenchment and integration of the Sanmen Gorge, the Lower Yellow River

Dong

et al. 2019

Global and Planetary Change

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.

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“…From each sample, heavy minerals were separated using the dense liquid tribromomethane (density 2.89 g/cm3). Heavy-mineral separates were analyzed by QEMSCAN at Colorado School of Mines (Golden, CO, USA), following the procedure described in detail in [39][40][41]. From 290 to 398 heavy-mineral grains were counted in each sample.…”

Section: Sampling and Methodsmentioning

confidence: 99%

Evolution of the Upper Yellow River as Revealed by Changes in Heavy-Mineral and Geochemical (REE) Signatures of Fluvial Terraces (Lanzhou, China)

et al. 2019

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Despite decades of study, the factors that controlled the formation and evolution of theupper reaches of the Yellow River, including uplift of the northeastern Tibetan Plateau, Pliocene-Pleistocene climate change, and autogenetic processes are still poorly constrained. The stratigraphicrecord of such paleogeographic evolution is recorded in the sequence of nine terraces formed duringprogressive incision of the Yellow River in the last 1.7 Ma. This article investigates in detail forsediment provenance in terraces of the Lanzhou area, based on heavy-mineral and geochemical(REE) signatures. Two main provenance changes are identified, pointing each to a majorpaleogeographic reorganization coupled with expansion of the upper Yellow River catchment andenhanced sediment fluxes. The first change took place between the deposition of terrace T9 (formedaround 1.7 Ma) and terrace T8 (formed around 1.5 Ma), when rapid fluvial incision point to tectoniccontrol and active uplift of northeastern Tibetan Plateau. The second change took place betweendeposition of terrace T4 (formed around 0.86 Ma) and terrace T3 (formed around 0.14 Ma), duringa period of low incision rates and notably enhanced sediment fluxes as a response to enhanced EastAsian Summer Monsoon and consequently increased precipitations, pointing instead chiefly toclimatic control.

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A comparison of heavy mineral assemblage between the loess and the Red Clay sequences on the Chinese Loess Plateau

Cited by 28 publications

References 39 publications

A constant Chinese Loess Plateau dust source since the late Miocene

A constant Chinese Loess Plateau dust source since the late Miocene

Fluvial entrenchment and integration of the Sanmen Gorge, the Lower Yellow River

Evolution of the Upper Yellow River as Revealed by Changes in Heavy-Mineral and Geochemical (REE) Signatures of Fluvial Terraces (Lanzhou, China)

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