Recording Fidelity of Relative Paleointensity Characteristics in the North Pacific Ocean

Gai, Congcong1,2,3; Liu, Yanguang4,5; Shi, Xuefa4,5; Sun, Chunqing6; Jiang, Xiaodong1,5; Liu, Jianxing4,5; Zhong, Yi1,5; Liu, Qingsong1,5,7

2021-07-01

10.1029/2021JB022068

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH   影响因子和分区

2169-9313

2169-9356

North Pacific Ocean sediments are important archives of geomagnetic field and paleoenvironmental evolutions, yet late Quaternary sedimentary sequences in the North Pacific Ocean are less explored because of generally low sedimentation rates and the challenge of dating sediments deposited below the calcite compensation depth. Core NP02 sediments from the North Pacific Ocean contain three visible tephra layers, which are identified as the To-Of, Spfa-1, and Kt-3 tephra, respectively. An age model for core NP02 is established based on tephra correlation and one radiocarbon date, which gives a mean sedimentation rate of similar to 11.6 cm/kyr. Magnetic analyses suggest the dominance of two remanence carriers; detrital vortex state and biogenic single domain magnetite. Variable depth offsets between the relative paleointensity (RPI) signals carried by the two remanence carriers adds a negligible age error (<0.5 kyr) to the core NP02 RPI record. Pronounced RPI amplitude variations are observed, and the Rockall and Laschamp excursions are identified in the core NP02 RPI record based on the age model. The fidelity of the core NP02 RPI record is further verified by comparison with other RPI stacks and records, and we demonstrate that the RPI variations can assist in chronology refinement.

SCI

英语

第一 ; 通讯

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000678880700009

AMER GEOPHYSICAL UNION

GEOSCIENCES

Web of Science

1.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Ctr Marine Magnetism, Shenzhen, Peoples R China
2.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
4.First Inst Oceanog, Key Lab Marine Sedimentol & Environm Geol, Minist Nat Resources, Qingdao, Peoples R China
5.Lab Marine Geol, Pilot Natl Lab Marine Sci & Technol, Qingdao, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China
7.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China

Gai, Congcong,Liu, Yanguang,Shi, Xuefa,et al. Recording Fidelity of Relative Paleointensity Characteristics in the North Pacific Ocean[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(7).

Gai, Congcong.,Liu, Yanguang.,Shi, Xuefa.,Sun, Chunqing.,Jiang, Xiaodong.,...&Liu, Qingsong.(2021).Recording Fidelity of Relative Paleointensity Characteristics in the North Pacific Ocean.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(7).

Gai, Congcong,et al."Recording Fidelity of Relative Paleointensity Characteristics in the North Pacific Ocean".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.7(2021).