Role of dust fluxes in stimulating Ethmodiscus rex giant diatom blooms in the northwestern tropical Pacific during the Last Glacial Maximum
Role of dust fluxes in stimulating Ethmodiscus rex giant diatom blooms in the northwestern tropical Pacific during the Last Glacial Maximum
复制标题
末次盛冰期尘埃通量对刺激西北热带太平洋巨型硅藻华的作用
DOI：
10.1016/j.palaeo.2018.08.017
复制
发表时间：
2018-12
期刊：
影响因子：
--
通讯作者：
Duofu Chen
中科院分区：
文献类型：
--
作者：
Min Luo;Thomas J Algeo;Linying Chen;Xuefa Shi;Duofu Chen
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 diatomEthmodiscus 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 ofE. rexgiant 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.
登录
查看更多内容
影响因子：
5.3
作者：
T. Pettke;A. Halliday;C. Hall;D. Rea
通讯作者：
T. Pettke;A. Halliday;C. Hall;D. Rea
影响因子：
3.9
作者：
J. Woodhead
通讯作者：
J. Woodhead
DOI：
10.2973/odp.proc.sr.123.158.1992
发表时间：
1992-08
期刊：
--
影响因子：
--
作者：
T. Plank;J. Ludden
通讯作者：
T. Plank;J. Ludden
2.36 Ma以来东亚季风降水与热带太平洋ENSO系统的共同演化：西菲律宾海高分辨率粘土矿物记录的新见解
影响因子：
5.3
作者：
Yu Zhaojie;Wan Shiming;Colin Christophe;Yan Hong;Bonneau Lucile;Liu Zhifei;Song Lina;Sun Hanjie;Xu Zhaokai;Jiang Xuejun;Li Anchun;Li Tiegang
通讯作者：
Li Tiegang
来自热带西太平洋的霸王龙叠层硅藻垫的硅同位素组成：对末次盛冰期期间硅酸盐循环的影响
影响因子：
--
作者：
Xiong Zhifang;Li Tiegang;Algeo Thomas;Doering Kristin;Frank Martin;Brzezinski Mark A.;Chang Fengming;Opfergelt Sophie;Crosta Xavier;Jiang Fuqing;Wan Shiming;Zhai Bin
通讯作者：
Zhai Bin