文献类型：期刊文献

英文题名：The Geochemistry and Bioturbation of Clay Sediments Associated with Amalgamated Crusts at the Gagua Ridge

作者：Chen, Shuai[1,2,3];Zeng, Zhigang[1,2,3];Wang, Xiaoyuan[1,2,3];Yin, Xuebo[1,3];Zhu, Bowen[1,4];Guo, Kun[2,5];Huang, Xin[2,6]

机构：[1]Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China;[2]Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266061, Shandong, Peoples R China;[3]Chinese Acad Sci, Ctr Ocean Mega Sci, 7 Nanhai Rd, Qingdao 266071, Shandong, Peoples R China;[4]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[5]Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Shandong, Peoples R China;[6]Guangdong Ocean Univ, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang 524088, Peoples R China

年份：2019

卷号：9

期号：3

外文期刊名：MINERALS

收录：SCI-EXPANDED(收录号：WOS:000464434500003)、、Scopus(收录号：2-s2.0-85064198732)、WOS

基金：This research was funded by the Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology (grant No. MMRKF201808), the National Programme on Global Change and Air-Sea Interaction (GASI-GEOGE-02), National Natural Science Foundation of China (41306053, 41476044, 41706052, 41325021), Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences (Grant No. MGE2015KG01, MGE2011KG09), Special Fund for the Taishan Scholar Program of Shandong Province (Grant No. ts201511061), and the AoShan Talents Program Supported by Qingdao National Laboratory for Marine Science and Technology (Grant No. 2015ASTP-0S17).

语种：英文

外文关键词：Gagua Ridge; amalgamated crusts; clay sediments; eolian dust; bioturbation

外文摘要：Based on the analysis of geochemical and mineralogical compositions, deep sea clay sediment characteristics and their material sources were examined in the eastern flank of the Gagua Ridge. The mineralogy mainly consists of detrital clay minerals, quartz, and authigenic phillipsite. There is scarce biogenic debris (siliceous or calcareous). The consolidated sediments are more enriched in Si, Al, K, Na, Li, Sc, Cr, Rb, and Cs than the associated crusts and nodules. The unmixed sediment samples were mainlycontributed by Asian eolian dust. The onset of the outer Fe-Mn crust growth nearly coincides with the Central Asia aridification event at similar to 3.5 Ma, which resulted in an abrupt increase in eolian flux of Asian dust. Intensified surface primary productivity is assumed to bring more metals to deep waters, and eventually facilitate the outer Fe-Mn crust formation. Authigenic phillipsite may come from the alteration of local basic volcanic glasses and cause excess Al, high Al/Ti, and low Si/Al ratios. However, phillipsites hardly affect the abundance of rare earth elements (REEs) and their patterns. In addition, the investigation of two kinds of burrows inside the consolidated sediments reveals that the inner nodules of the amalgamated crusts may remain on the oxic sediment surface, due to frequent benthic activities.