Variations in erosion intensity and soil maturity as revealed by mineral magnetism of sediments from an alpine lake in monsoon-dominated central east China and their implications for environmental changes over the past 5500 years

Bibliographic Data

ID12267158
AuthorsHongya Wang (0000-0003-3816-1101, Peking University, corresponding author), Ying Cheng (0000-0001-7732-9806, Peking University), Yao Luo (0000-0003-1463-8438, Peking University), Zhang Cai-na (Peking University), Cai’na Zhang (Peking University), Lei Deng (0000-0001-8695-534X, Peking University), Xiuyun Yang (0000-0003-2463-6225, Peking University), Hongyan Liu (0000-0002-6721-4439, Peking University)
Year2019
Volume29
Issue12
Pages1835-1855
Publication date2019-08-07
Peer ReviewedYes
Open AccessYes
TypeARTICLE
VenueThe Holocene (JOURNAL)
Journal identifiersISSN: 0959-6836 • E-ISSN: 1477-0911
PublisherSAGE Publishing (PUBLISHER • US)
DOI10.1177/0959683619865583
OpenAlexW2967434703
LanguageEN
Citations received1
References cited49

Measurements of mineral magnetism were performed on a sediment sequence recovered from Foye Chi, an alpine lake (3410 m a.s.l.) on the southern slope of the Taibai Mountain (3767 m a.s.l.), the highest mountain in east mainland China (east of 105°E) influenced by East Asian summer monsoon (EASM) and East Asian winter monsoon (EAWM). Mineral magnetism were also measured for surface sediments from the lake, rock debris, surface soils and a soil profile from its catchment and surface soils at the elevations of 600–3767 m a.s.l. of the southern slope of the Mountain. AMS 14 C dating, analyses of pollen, particle size, TOC, TN and δ 13 N org were conducted for the sediment sequence while pollen analysis was also made for the surface-sediment sample. Variations in χ lf , χ ARM , IRM 300mT and SIRM of the sediment sequence were attributed to changes in erosion intensity, while those in IRM 20mT /ARM and particularly χ ARM /SIRM to changes in soil maturity. With aid of the other data, the magnetic data of the sediment sequence revealed environmental changes over the past ~5520 years. The weighted χ ARM /SIRM values of the sediment sequence in comparison with χ ARM /SIRM of the surface soils distributed on different elevations allowed estimating the altitudes where the present environments are similar to the past ones for different periods of the past ~5520 years. The reconstructed environmental changes are generally in agreement with the centennial-scale variability of EASM indicated by a stalagmite 18 O record and with that of EAWM indicated by an 18 O record of planktonic foraminiferal

Climatology · East Asian Monsoon · Erosion · Geography · Geomorphology · Hydrology (agriculture · Monsoon · Physical geography · Sediment · Soil water · Geological formations and processes · Geology and Paleoclimatology Research · Geomagnetism and Paleomagnetism Studies · Geology · Soil Science