Magnetostratigraphic framework and magnetic properties of modern sediment in the Yellow River Delta

Wang WanZhang1,2; Zhou LiangYong3,4; Duan ZongQi1,8; Jiang ZhaoXia5,8; Liu JianXing6,8; Liu QingSong7,8

2019-05

10.6038/cjg2019M0158

CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION   影响因子和分区

0001-5733

Magnetostratigraphic and rock magnetic studies have been conducted on sediments Core Z07 from the Yellow River Delta. Constrained by the deposition rate and paleomagnetic secular variation curves, we constructed a reliable chronological framework. Rock magnetic results indicate that the main magnetic minerals are single domain (SD) magnetites with considerable amount of superparamgnetic (SP) particles. The grain size and concentration of magnetic particles in sediments change significantly with depths. Compared to the bottom sediment, the uppermost part has lower concentrations of SP and SD ferrimagnetic grains. We attribute these changes occurred around 2003 mainly to the Water and Sediment Regulation Scheme (WSRS) project launched by the Chinese government, which focuses on solving the sedimentation reservoir problems at the lower reaches of the Yellow River. Along with the continuous implementations of WSRS, the erosion rate of lower reach of the Yellow River increased. It became a new sediment source and the median grain size of suspended sediment in Lijin station increased accordingly, which results in elevated sediment loads. Therefore, this new source of sediment may cause the differences of magnetic properties around 2003.

Modern Yellow River delta Magnetostratigraphy Environmental magnetism Sedimentary environmental evolution

SCI ; EI

中文

通讯

国家基金委-山东省联合基金项目-海洋地质过程与环境(U1606401)%国家重点研发计划(2016YFA0601903)%亚洲大陆边缘项目“全球变化与海气相互作用”专项(GASI-GEOGE-03)%国家自然科学基金(41430962,41506075)

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000467308600016

SCIENCE PRESS

20192907187060

Deposition rates ; Grain size and shape ; Lithology ; Magnetic properties ; Magnetism ; Magnetite ; Reservoirs (water) ; Rivers

Reservoirs:441.2 ; Geology:481.1 ; Soil Mechanics and Foundations:483 ; Magnetism: Basic Concepts and Phenomena:701.2

GEOSCIENCES

Web of Science

dqwlxb201905016

1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China Geol Survey, Qingdao Inst Marine Geol, Qingdao 266071, Shandong, Peoples R China
4.China Geol Survey, Key Lab Coastal Wetland Biogeosci, Qingdao 266071, Shandong, Peoples R China
5.Ocean Univ China, Key Lab Submarine Geosci & Prospecting Tech, MOE, Coll Marine Geosci, Qingdao 266100, Shandong, Peoples R China
6.SOA, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China
7.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China
8.Qingdao Natl Oceanog Lab Marine Sci & Technol, Lab Marine Geol & Environm, Qingdao 266237, Shandong, Peoples R China

Wang WanZhang,Zhou LiangYong,Duan ZongQi,et al. Magnetostratigraphic framework and magnetic properties of modern sediment in the Yellow River Delta[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2019,62(5):1772-1788.

Wang WanZhang,Zhou LiangYong,Duan ZongQi,Jiang ZhaoXia,Liu JianXing,&Liu QingSong.(2019).Magnetostratigraphic framework and magnetic properties of modern sediment in the Yellow River Delta.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,62(5),1772-1788.

Wang WanZhang,et al."Magnetostratigraphic framework and magnetic properties of modern sediment in the Yellow River Delta".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 62.5(2019):1772-1788.