Magnetic mineral tracing of sediment provenance in the central Bengal Fan

doi:10.1016/j.margeo.2019.05.014

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋地质与地球物理研究室

	Magnetic mineral tracing of sediment provenance in the central Bengal Fan
	Xuea, Pengfei 1; Chang, Liao 1,2; Wang, Shishun 1; Liu, Shengfa 2,3; Li, Jinhua 2,4; Shi, Xuefa 2,3; Khokiattiwong, Somkiat 5; Kornkanitnan, Narumol 5
刊名	MARINE GEOLOGY
	2019-09
卷号	415
ISSN号	0025-3227
DOI	10.1016/j.margeo.2019.05.014
英文摘要	We present a comprehensive magnetic mineral analysis of surface sediments from 110 sites in the central Bengal Fan to trace sediment provenance. Multiple magnetic parameters, including magnetic mineralogy, concentration, and grain size were generated. Rock magnetic measurements indicate that the dominant magnetic minerals within the studied sediments are detrital magnetite and titanomagnetite, which is further confirmed directly by scanning electron microscope (SEM) and transmission electron microscope (TEM) observations on magnetic extracts. Fuzzy c-means clustering analysis of magnetic parameters indicates that the study area can be divided into three clusters. Considering the position of 'active valley', we further divide cluster 1 into clusters 1A and 1B. Cluster 1A primarily covers the west side of the 'active valley' with relatively high magnetic concentrations and dominantly coarse-grained magnetic minerals, which likely correspond to basaltic materials derived from the Deccan Plateau. From the Godavari river mouth to the inner Bay of Bengal, magnetic concentration gradually decreases with a fining trend of magnetic grain size. Clusters 1B, 2, and 3 are on the east side of the 'active valley', where magnetic concentration and magnetic grain size decrease with increasing distance to the 'active valley'. Combined with published data in the Indian region and the upper Bengal Fan, we suggest that the main provenances are the Himalayan and the Deccan Plateau, whose contributions to sediment distribution are quantitatively assessed. Our analysis suggests that the position of 'active valley' plays a key role in sediment distribution in the central Bengal Fan, while the effect of ocean currents is negligible.
资助项目	National Natural Science Foundation of China[41574060] ; National Natural Science Foundation of China[41722402] ; National Natural Science Foundation of China[41676054] ; National Natural Science Foundation of China[U1606401]
WOS研究方向	Geology ; Oceanography
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000481723500006
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/30127]
专题	业务部门_海洋地质与地球物理研究室
通讯作者	Chang, Liao; Shi, Xuefa
作者单位	1.Peking Univ, Sch Earth & Space Sci, Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China 3.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 5.Marine & Coastal Resources Res & Dev Inst, Dept Marine & Coastal Resources, Bangkok 10210, Thailand
推荐引用方式 GB/T 7714	Xuea, Pengfei,Chang, Liao,Wang, Shishun,et al. Magnetic mineral tracing of sediment provenance in the central Bengal Fan[J]. MARINE GEOLOGY,2019,415.
APA	Xuea, Pengfei.,Chang, Liao.,Wang, Shishun.,Liu, Shengfa.,Li, Jinhua.,...&Kornkanitnan, Narumol.(2019).Magnetic mineral tracing of sediment provenance in the central Bengal Fan.MARINE GEOLOGY,415.
MLA	Xuea, Pengfei,et al."Magnetic mineral tracing of sediment provenance in the central Bengal Fan".MARINE GEOLOGY 415(2019).