Mineralogy of sediments in the Mariana Trench controlled by environmental conditions of the West Pacific since the Last Glacial Maximum

doi:10.1016/j.jseaes.2023.105553

IOCAS-IR > 海洋地质与环境重点实验室

	Mineralogy of sediments in the Mariana Trench controlled by environmental conditions of the West Pacific since the Last Glacial Maximum
	Lai, Weibo 1,3; Liu, Xiting 1,2; Tian, Jiwei 4; Wang, Houjie 1,2; Zhang, Jin 5; Huang, Jie 2,5; Wan, Shiming2,5
	2023-04-01
发表期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
卷号	245 页码:10
通讯作者	Liu, Xiting([email protected])
摘要	The trench represents an important sink of sediments as a result of the "funneling effect", however, the mineralogy of trench sediments and its response to environmental conditions is still not well understood. To fill this knowledge gap, we present a 3.2-m-long sedimentary record of core MT03, which was collected from the southern slope of the "Challenger Deep" in the Mariana Trench at a water depth of 8300 m. The results document that the minerals in the bulk sediments mainly include quartz, feldspar, mica, pyrite, apatite, and clay minerals. The clay minerals are mainly composed of smectite and illite, which are respectively derived from volcanic matter and Asian aeolian dust. At the bottom of the core, the increased aeolian input, which is reflected by high illite/smectite ratios, led to the blooming of diatoms and the formation of laminated diatom mats during the Last Glacial Maximum. During this period, the anaerobic oxidation of abundant organic matter led to an anoxic environment in the sediment where the authigenic pyrite precipitated. In the middle and upper sections of the core, the decrease in contents of organic carbon and authigenic pyrite indicates that the sedimentary environ-ment became oxic, which is attributed to low productivity caused by reduced input of the aeolian dust in the deglacial period and Holocene. Therefore, our new findings indicate that the mineralogy of trench sediments is sensitive to the evolution of paleoclimate and paleoceanography, providing a new perspective to study the environmental evolution of the West Pacific.
关键词	Mariana Trench Paleoclimate Mineralogy Clay mineral Last Glacial Maximum
DOI	10.1016/j.jseaes.2023.105553
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[91858203]; National Natural Science Foundation of China[41976053]; National Natural Science Foundation of China[42276060]; Natural Science Foundation of Shandong Province[ZR2021YQ26]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000924348100001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	LAMINATED DIATOM MATS ; ELEMENT GEOCHEMISTRY ; ORGANIC-MATTER ; SOUTH ; CLAY ; ACCUMULATION ; PRODUCTIVITY ; PHOSPHORUS ; ATLANTIC ; MANTLE
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/183480
专题	海洋地质与环境重点实验室
通讯作者	Liu, Xiting
作者单位	1.Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Technol, Minist Educ, Qingdao 266100, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 4.Ocean Univ China, Key Lab Phys Oceanog, Minist Educ, Qingdao 266100, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Lai, Weibo,Liu, Xiting,Tian, Jiwei,et al. Mineralogy of sediments in the Mariana Trench controlled by environmental conditions of the West Pacific since the Last Glacial Maximum[J]. JOURNAL OF ASIAN EARTH SCIENCES,2023,245:10.
APA	Lai, Weibo.,Liu, Xiting.,Tian, Jiwei.,Wang, Houjie.,Zhang, Jin.,...&Wan, Shiming.(2023).Mineralogy of sediments in the Mariana Trench controlled by environmental conditions of the West Pacific since the Last Glacial Maximum.JOURNAL OF ASIAN EARTH SCIENCES,245,10.
MLA	Lai, Weibo,et al."Mineralogy of sediments in the Mariana Trench controlled by environmental conditions of the West Pacific since the Last Glacial Maximum".JOURNAL OF ASIAN EARTH SCIENCES 245(2023):10.