IOCAS-IR  > 海洋地质与环境重点实验室
Paleoclimatic evolution of the SW and NE South China Sea and its relationship with spectral reflectance data over various age scales
Liu, Chang1; Clift, Peter D.2,3; Giosan, Liviu4; Miao, Yunfa2,5; Warny, Sophie2; Wan, Shiming6
2019-07-01
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume525Pages:25-43
Corresponding AuthorLiu, Chang(liu@iodp.tamu.edu)
AbstractSpectral analysis of sediment from International Ocean Discovery Program (IODP) Site U1433 in the South China Sea can be used to constrain humidity and temperature through time by constructing hematite/goethite records spanning the last 10 million years. Records in the southwest and northern parts of this basin show long-term contrasting trends, despite the fact that geochemical evidence for alteration is similar in both parts of the basin, i.e. towards less alteration since 10 Ma. However, contrasting clay mineral assemblages in the northern and southwestern areas do suggest long-term changes in the relative climate of Indochina and southern China. We interpret this to reflect the northward migration of the ITCZ since the Miocene resulting in a progressive drying of Indochina and increasingly wet conditions in South China. Sediment believed to be supplied from the Mekong River (IODP Site U1433) shows increasing chemical weathering at a time of long-term drying of the climate. This probably reflects increasing chemical weathering driven by slower transport and despite reduced rates of chemical alteration in the context of a colder, drier climate since the Miocene. In general hematite/goethite data are consistent with pollen constraints from the same drill site that show colder conditions with increasing hematite/goethite since 3 Ma and with a transition to apparently wetter conditions since the mid-Pleistocene transition (MPT). This implies that most of the sediment in the southwestern basin is weathered and eroded during warmer, wetter interglacial phases, at least since the MPT.
KeywordHematite/Goethite Chemical weathering Intertropical convergence zone (ITCZ) IODP Exp. 349 Clay mineralogy Bulk geochemistry
DOI10.1016/j.palaeo.2019.02.019
Indexed BySCI
Language英语
Funding ProjectGSA Graduate Student Research grant ; USSSP ; Charles T. McCord Chair in Petroleum Geology at Louisiana State University
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000468711700003
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/161413
Collection海洋地质与环境重点实验室
Corresponding AuthorLiu, Chang
Affiliation1.Texas A&M Univ, Int Ocean Discovery Program, College Stn, TX 77845 USA
2.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA
3.Yunnan Univ, Res Ctr Earth Syst Sci, Kunming, Yunnan, Peoples R China
4.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02540 USA
5.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China
6.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Liu, Chang,Clift, Peter D.,Giosan, Liviu,et al. Paleoclimatic evolution of the SW and NE South China Sea and its relationship with spectral reflectance data over various age scales[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2019,525:25-43.
APA Liu, Chang,Clift, Peter D.,Giosan, Liviu,Miao, Yunfa,Warny, Sophie,&Wan, Shiming.(2019).Paleoclimatic evolution of the SW and NE South China Sea and its relationship with spectral reflectance data over various age scales.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,525,25-43.
MLA Liu, Chang,et al."Paleoclimatic evolution of the SW and NE South China Sea and its relationship with spectral reflectance data over various age scales".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 525(2019):25-43.
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