Zhong, Y; Wilson, D; Liu, J; Wan, S; Bao, R; Liu, J; Zhang, Y; ... Liu, Q; + view all Zhong, Y; Wilson, D; Liu, J; Wan, S; Bao, R; Liu, J; Zhang, Y; Wang, X; Liu, Y; Liu, X; Zhao, Y; Li, S; Liu, Q; - view fewer (2021) Contrasting sensitivity of weathering proxies to Quaternary climate and sea-level fluctuations on the southern slope of the South China Sea. Geophysical Research Letters , 48 (24) , Article e2021GL096433. 10.1029/2021GL096433.

Preview

Text Wilson_Geophysical Research Letters - 2021.pdf Download (2MB) | Preview

Abstract

Tropical marginal seas host important sedimentary archives that may be exploited to reveal past changes in continental erosion, chemical weathering, and ocean dynamics. However, these records can be challenging to interpret due to the complex interactions between climate and particulate transport across ocean margins. For the southern South China Sea over the last 90 Kyr, we observe a contrasting temporal relationship between the deposition of clay minerals and magnetic minerals, which were associated with two different hydrodynamic modes. Fine-grained clay minerals can be carried in suspension by ocean currents, leading to a rapid response to regional climate-driven inputs. In contrast, changes in magnetic mineralogy were linked to glacial-interglacial sea level variability, from which we infer a control by bedload transport and resuspension. Overall, this study indicates that the transfer pathways and mechanisms imparted by varying hydrodynamic conditions exert a substantial influence on the distribution of terrigenous material in continental margin sediments.

Download activity - last month

Export as JSONXMLCSV

Download activity - last 12 months

Export as JSONCSVXML

Downloads by country - last 12 months

Export as CSVXMLJSON

Archive Staff Only

View Item