History of Asian eolian input to the Sea of Japan since 15 Ma; links to Tibetan uplift or global cooling?

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doi: 10.1016/j.epsl.2017.06.053
Author(s): Shen Xingyan; Wan Shiming; France-Lanord, Christian; Clift, Peter D.; Tada, Ryuji; Révillon, Sidonie; Shi Xuefa; Zhao Debo; Liu Yanguang; Yin Xuebo; Song Zehua; Li Anchun
Author Affiliation(s): Primary:
Chinese Academy of Sciences, Institute of Oceanology, Qingdao, China
Other:
Université de Lorraines, France
Louisiana State University, United States
University of Tokyo, Japan
Institut Universitaire Européen de la Mer, France
Qingdao National Laboratory for Marine Science and Technology, China
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, Vol.474, p.296-308. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. Includes appendix. 65 refs.; illus., incl. 3 tables, sketch map
Summary: We present high-resolution analyses of clay mineral assemblages combined with analysis of Sr-Nd-Pb isotopic compositions of the <2 µm silicate fraction of sediments from Integrated Ocean Drilling Program (IODP) Site U1430 in the southern Sea of Japan, in order to trace the sources of clay minerals and reconstruct proxy records of past changes in Asian eolian input to the basin since 15 Ma. The clay mineral assemblages at IODP Site U1430 mainly consist of smectite (∼51%) and illite (∼36%), with minor kaolinite (∼7%) and chlorite (∼6%). Provenance analysis suggests that the fine-grained sediment at the study site is a two end-member mixture of eolian dust from Central Asia and fluvial input from the Japanese islands. The Central Asian end member supplied illite-rich and high 87Sr/86Sr and low εNd(0) eolian dust to the study site by wind, while the Japanese end member, characterized by young volcanic rocks, contributed smectite-rich, low 87Sr/86Sr and high εNd(0) weathering products via rivers. The ratio of illite/smectite and εNd(0) values of clay-sized silicate sediments at Site U1430 were used as proxies for tracing the changing strength of central Asian eolian input to the Sea of Japan, and thus reconstruct the aridification history of its source region. Our study presents for the first time a continuous, high-resolution record that highlights the four-step drying of Central Asia that occurred at ∼11.8 Ma, 8 Ma, 3.5 Ma and 1.2 Ma. Considered the nature and timing of major climatic and tectonic events in Asia, we conclude that the strengthened aridification of Central Asia starting at ∼11.8 Ma was possibly driven by the combined effect of Tibetan surface uplift and global cooling, whereas the rapid drying at ∼8 Ma was caused primarily by the uplift of the northern Tibetan Plateau. In contrast, global cooling, overwhelming the influence of Tibetan Plateau uplift, has become the primary control on Central Asia aridification since ∼3.5 Ma.
Year of Publication: 2017
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Alkaline earth metals; Aridification; Asia; Cenozoic; Chlorite; Chlorite group; Clay minerals; Expedition 346; IODP Site U1430; Illite; Integrated Ocean Drilling Program; Isotope ratios; Isotopes; Japan Sea; Kaolinite; Lead; Metals; Miocene; Neodymium; Neogene; North Pacific; Northwest Pacific; Pacific Ocean; Paleoclimatology; Quaternary; Rare earths; Sheet silicates; Silicates; Smectite; Sr-87/Sr-86; Stable isotopes; Strontium; Tertiary; Tibetan Plateau; Transport; Ulleung Basin; Uplifts; West Pacific; Wind transport
Coordinates: N375409 N375410 E1313215 E1313215
Record ID: 2017076611
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands