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Holocene environmental changes in central Inner Mongolia revealed by luminescence dating of sediments from the Sala Us River valley

Journal Article


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Abstract


  • Luminescence dating of the fluvial and lacustrine sediments from the Sala Us River valley at the south edge of the Mu Us Desert, central Inner Mongolia, is reported. The study region lies in the northwestern marginal zone of the east Asian summer monsoon and is sensitive to climate change. The dating results combined with environmental proxies indicate that the Holocene Climate Optimum period, took place from 8.5 to 5 ka ago and was marked by lake development. After ~5 ka ago, the region became arid, as inferred from lake regression and fluvial activity. Deposition of fluvial sediments lasted from ~5 ka to ~2 ka ago. At about 2 ka ago, incision of the Sala Us River was initiated into the underlying sediments, with a down-cutting rate of ~3–4 cm/yr. Since 2 ka ago, human activities also played an important role in causing environmental change in the region.

UOW Authors


  •   Li, Sheng-Hua (external author)
  •   Sun, Jimin (external author)
  •   Li, Bo

Publication Date


  • 2012

Geographic Focus


Citation


  • Li, S., Sun, J. & Li, B. (2012). Holocene environmental changes in central Inner Mongolia revealed by luminescence dating of sediments from the Sala Us River valley. The Holocene: a major interdisciplinary journal focusing on recent environmental change, 22 (4), 397-404.

Scopus Eid


  • 2-s2.0-84863285538

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1266&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/267

Number Of Pages


  • 7

Start Page


  • 397

End Page


  • 404

Volume


  • 22

Issue


  • 4

Abstract


  • Luminescence dating of the fluvial and lacustrine sediments from the Sala Us River valley at the south edge of the Mu Us Desert, central Inner Mongolia, is reported. The study region lies in the northwestern marginal zone of the east Asian summer monsoon and is sensitive to climate change. The dating results combined with environmental proxies indicate that the Holocene Climate Optimum period, took place from 8.5 to 5 ka ago and was marked by lake development. After ~5 ka ago, the region became arid, as inferred from lake regression and fluvial activity. Deposition of fluvial sediments lasted from ~5 ka to ~2 ka ago. At about 2 ka ago, incision of the Sala Us River was initiated into the underlying sediments, with a down-cutting rate of ~3–4 cm/yr. Since 2 ka ago, human activities also played an important role in causing environmental change in the region.

UOW Authors


  •   Li, Sheng-Hua (external author)
  •   Sun, Jimin (external author)
  •   Li, Bo

Publication Date


  • 2012

Geographic Focus


Citation


  • Li, S., Sun, J. & Li, B. (2012). Holocene environmental changes in central Inner Mongolia revealed by luminescence dating of sediments from the Sala Us River valley. The Holocene: a major interdisciplinary journal focusing on recent environmental change, 22 (4), 397-404.

Scopus Eid


  • 2-s2.0-84863285538

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1266&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/267

Number Of Pages


  • 7

Start Page


  • 397

End Page


  • 404

Volume


  • 22

Issue


  • 4