Role of dust fluxes in stimulating Ethmodiscus rex giant diatom blooms in the northwestern tropical Pacific during the Last Glacial Maximum

doi:10.1016/j.palaeo.2018.08.017

	Role of dust fluxes in stimulating Ethmodiscus rex giant diatom blooms in the northwestern tropical Pacific during the Last Glacial Maximum
	Luo, Min 1,2; Algeo, Thomas J.3; Chen, Linying 1,4; Shi, Xuefa 2,5; Chen, Duofu 1,4
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2018-12-15
卷号	511 页码:319-331
关键词	Sr-Nd isotopes Clay-mineral assemblages Mariana Trench Eolian dust Giant diatom blooms Prevailing Westerlies
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2018.08.017
英文摘要	The strontium (Sr) and neodymium (Nd) isotope compositions and clay-mineral assemblages of the lithogenic fraction of sediments in the southern Mariana Trench together with major- and trace-elements concentrations of bulk sediments have been determined to trace the sediment provenance and investigate the relationship between Asian dust input and blooms of the giant diatom Ethmodiscus rex (E. rex). Enrichment of barium (Ba) in relative to upper continental crust (UCC) and low average Rb/K ratios in all study cores point to both hydrothermal and volcaniclastic inputs to the sediments. Both the Sr-Nd isotope compositions and the clay-mineral assemblages of the lithogenic fraction reflect a two-component mixing system consisting of Mariana arc volcaniclastics and Asian eolian dust. Decreases in smectite content and kaolinite/chlorite ratio and increases in illite content and illite/kaolinite ratio just preceding the formation of laminated diatom mats (LDMs) suggest changes in the source of the eolian dust from eastern Asian deserts (EADs) to central Asian deserts (CADs) at the onset of the Last Glacial Maximum (LGM) which stimulated the blooming of E. rex giant diatom. These observations suggest a potential causal linkage among atmospheric circulation patterns, the sources of Asian eolian dust, and marine productivity. We postulate that intensified eolian dust input sourced from CADs may have played a greater role in promoting biological productivity in the oligotrophic northwestern tropical Pacific Ocean during the LGM than previously realized.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDB06030102]
WOS关键词	CLAY MINERAL DISTRIBUTION ; SOUTHERN MARIANA TROUGH ; WESTERN PHILIPPINE SEA ; EAST-ASIAN MONSOON ; LONG-RANGE TRANSPORT ; NORTH-PACIFIC ; EQUATORIAL PACIFIC ; SURFACE SEDIMENTS ; DEEP-SEA ; EOLIAN DUST
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000452583600019
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25454]
专题	自然资源部第一海洋研究所
通讯作者	Chen, Duofu
作者单位	1.Shanghai Ocean Univ, Coll Marine Sci, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Univ Cincinnati, Dept Geol, Cincinnati, OH 45221 USA 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China 5.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	Luo, Min,Algeo, Thomas J.,Chen, Linying,et al. Role of dust fluxes in stimulating Ethmodiscus rex giant diatom blooms in the northwestern tropical Pacific during the Last Glacial Maximum[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2018,511:319-331.
APA	Luo, Min,Algeo, Thomas J.,Chen, Linying,Shi, Xuefa,&Chen, Duofu.(2018).Role of dust fluxes in stimulating Ethmodiscus rex giant diatom blooms in the northwestern tropical Pacific during the Last Glacial Maximum.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,511,319-331.
MLA	Luo, Min,et al."Role of dust fluxes in stimulating Ethmodiscus rex giant diatom blooms in the northwestern tropical Pacific during the Last Glacial Maximum".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 511(2018):319-331.