A seven-million-year hornblende mineral record from the central Chinese Loess Plateau

Abstract Previous studies of the late Cenozoic erosion rate have yielded different views—long-term stable rates or a significant increase at climate transitions—leading to uncertainty concerning the hypothesized global erosion rate controlled by either tectonic uplift or climatic changes. Here, we p...

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Autores principales:	Tong He, Lianwen Liu, Yang Chen, Xuefen Sheng, Junfeng Ji
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b14bd93b3b8e47b598ad6c02776d8a78
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spelling	oai:doaj.org-article:b14bd93b3b8e47b598ad6c02776d8a782021-12-02T16:06:21ZA seven-million-year hornblende mineral record from the central Chinese Loess Plateau10.1038/s41598-017-02400-02045-2322https://doaj.org/article/b14bd93b3b8e47b598ad6c02776d8a782017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02400-0https://doaj.org/toc/2045-2322Abstract Previous studies of the late Cenozoic erosion rate have yielded different views—long-term stable rates or a significant increase at climate transitions—leading to uncertainty concerning the hypothesized global erosion rate controlled by either tectonic uplift or climatic changes. Here, we present a seven-million-year hornblende mineral record along the Lingtai section of the Chinese Loess Plateau. By examining the spatial distribution of hornblende minerals in seven desert basins, which are potential loess source areas, we constructed a ratio of hornblende versus total heavy minerals to reflect past changes in physical/chemical weathering strength. Our results demonstrate that the ratio has generally increased since 7 Ma, with three significant shifts recorded at 2.6 Ma, 1.4 Ma and 0.5 Ma linked to the onset, continuation and expansion of the Northern Hemisphere glaciation, respectively. Given that chemical weathering during the diagenetic history produces a trend of smoothly increasing hornblende migrating upwards, the three shifts at these boundaries can be interpreted as changes in the bedrock erosion rate on the northern Tibetan Plateau, which may be related to tectonic uplift events and incision of the Yellow River. Evidence presented here supports the idea of coupling between climate change, tectonic uplift and regional erosion.Tong HeLianwen LiuYang ChenXuefen ShengJunfeng JiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tong He Lianwen Liu Yang Chen Xuefen Sheng Junfeng Ji A seven-million-year hornblende mineral record from the central Chinese Loess Plateau
description	Abstract Previous studies of the late Cenozoic erosion rate have yielded different views—long-term stable rates or a significant increase at climate transitions—leading to uncertainty concerning the hypothesized global erosion rate controlled by either tectonic uplift or climatic changes. Here, we present a seven-million-year hornblende mineral record along the Lingtai section of the Chinese Loess Plateau. By examining the spatial distribution of hornblende minerals in seven desert basins, which are potential loess source areas, we constructed a ratio of hornblende versus total heavy minerals to reflect past changes in physical/chemical weathering strength. Our results demonstrate that the ratio has generally increased since 7 Ma, with three significant shifts recorded at 2.6 Ma, 1.4 Ma and 0.5 Ma linked to the onset, continuation and expansion of the Northern Hemisphere glaciation, respectively. Given that chemical weathering during the diagenetic history produces a trend of smoothly increasing hornblende migrating upwards, the three shifts at these boundaries can be interpreted as changes in the bedrock erosion rate on the northern Tibetan Plateau, which may be related to tectonic uplift events and incision of the Yellow River. Evidence presented here supports the idea of coupling between climate change, tectonic uplift and regional erosion.
format	article
author	Tong He Lianwen Liu Yang Chen Xuefen Sheng Junfeng Ji
author_facet	Tong He Lianwen Liu Yang Chen Xuefen Sheng Junfeng Ji
author_sort	Tong He
title	A seven-million-year hornblende mineral record from the central Chinese Loess Plateau
title_short	A seven-million-year hornblende mineral record from the central Chinese Loess Plateau
title_full	A seven-million-year hornblende mineral record from the central Chinese Loess Plateau
title_fullStr	A seven-million-year hornblende mineral record from the central Chinese Loess Plateau
title_full_unstemmed	A seven-million-year hornblende mineral record from the central Chinese Loess Plateau
title_sort	seven-million-year hornblende mineral record from the central chinese loess plateau
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b14bd93b3b8e47b598ad6c02776d8a78
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A seven-million-year hornblende mineral record from the central Chinese Loess Plateau

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