IGGCAS OpenIR  > 地球与行星物理院重点实验室
Analysis of an Updated Paleointensity Database (Q(PI)-PINT) for 65-200 Ma: Implications for the Long-Term History of Dipole Moment Through the Mesozoic
Kulakov, E., V1; Sprain, C. J.2,3; Doubrovine, P., V1; Smirnov, A., V4,5; Paterson, G. A.2,6; Hawkins, L.2; Fairchild, L.7; Piispa, E. J.8; Biggin, A. J.2
2019-10-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN2169-9313
Volume124Issue:10Pages:9999-10022
AbstractThe global paleointensity database for 65-200 Ma was analyzed using a modified suite of paleointensity quality criteria (Q(PI)) such that the likely reliability of measurements is assessed objectively and as consistently as possible across the diverse data set. This interval was chosen because of dramatic extremes of geomagnetic polarity reversal frequency ranging from greater than 10 reversals per million years in the Jurassic hyperactivity period (155-171 Ma) to effectively zero during the Cretaceous Normal Superchron (CNS; 84-126 Ma). Various attempts to establish a relationship between the strength of Earth's magnetic field and the reversal frequency have been made by previous studies, but no consensus has yet been reached primarily because of large uncertainties in paleointensity estimates and sensitivity of these estimates to data selection approaches. It is critical to overcome this problem because the evolution of the dipole moment is a first order constraint on the behavior of the geodynamo. Here we show that conventional statistical tests and Bayesian changepoint modeling consistently indicate the strongest median/average virtual dipole moment during the CNS. In addition, the CNS and Jurassic hyperactivity period are characterized by the highest and lowest percentage of virtual dipole moments exceeding the overall median for the 65- to 200-Ma interval, respectively. These observations suggest that the superchron dynamo was able to generate stronger fields than the dynamo operating in the frequently reversing regime. While the precise mechanism remains unclear, our results are compatible with the hypothesis that field strength and reversal rate variation are controlled by changes in core-mantle boundary thermochemical conditions.
Keywordgeodynamo superchron geomagnetic field reversal dipole moment variation
DOI10.1029/2018JB017287
Funding OrganizationResearch Council of Norway ; Research Council of Norway ; Natural Environment Research Council (NERC) ; Natural Environment Research Council (NERC) ; NSFC ; NSFC ; Leverhulme Trust ; Leverhulme Trust ; NERC ; NERC ; Research Council of Norway ; Research Council of Norway ; Natural Environment Research Council (NERC) ; Natural Environment Research Council (NERC) ; NSFC ; NSFC ; Leverhulme Trust ; Leverhulme Trust ; NERC ; NERC ; Research Council of Norway ; Research Council of Norway ; Natural Environment Research Council (NERC) ; Natural Environment Research Council (NERC) ; NSFC ; NSFC ; Leverhulme Trust ; Leverhulme Trust ; NERC ; NERC ; Research Council of Norway ; Research Council of Norway ; Natural Environment Research Council (NERC) ; Natural Environment Research Council (NERC) ; NSFC ; NSFC ; Leverhulme Trust ; Leverhulme Trust ; NERC ; NERC
WOS KeywordEARTHS MAGNETIC-FIELD ; CRETACEOUS NORMAL SUPERCHRON ; SUBMARINE BASALTIC GLASS ; REVERSAL FREQUENCY ; GEOMAGNETIC-FIELD ; ABSOLUTE PALAEOINTENSITIES ; MANTLE CONVECTION ; STORMBERG LAVAS ; INTENSITY ; PALAEOMAGNETISM
Language英语
Funding ProjectResearch Council of Norway[223272] ; Natural Environment Research Council (NERC)[NE/P017266/1] ; NSFC[41574063] ; Leverhulme Trust[RL-2016-080] ; NERC[NE/P00170X/1]
Funding OrganizationResearch Council of Norway ; Research Council of Norway ; Natural Environment Research Council (NERC) ; Natural Environment Research Council (NERC) ; NSFC ; NSFC ; Leverhulme Trust ; Leverhulme Trust ; NERC ; NERC ; Research Council of Norway ; Research Council of Norway ; Natural Environment Research Council (NERC) ; Natural Environment Research Council (NERC) ; NSFC ; NSFC ; Leverhulme Trust ; Leverhulme Trust ; NERC ; NERC ; Research Council of Norway ; Research Council of Norway ; Natural Environment Research Council (NERC) ; Natural Environment Research Council (NERC) ; NSFC ; NSFC ; Leverhulme Trust ; Leverhulme Trust ; NERC ; NERC ; Research Council of Norway ; Research Council of Norway ; Natural Environment Research Council (NERC) ; Natural Environment Research Council (NERC) ; NSFC ; NSFC ; Leverhulme Trust ; Leverhulme Trust ; NERC ; NERC
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000498770200002
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95855
Collection地球与行星物理院重点实验室
Corresponding AuthorKulakov, E., V
Affiliation1.Univ Oslo, Ctr Earth Evolut & Dynam, Oslo, Norway
2.Univ Liverpool, Dept Earth Ocean & Ecol Sci, Liverpool, Merseyside, England
3.Univ Florida, Dept Geol Sci, Gainesville, FL USA
4.Michigan Technol Univ, Dept Geol & Min Engn & Sci, Houghton, MI 49931 USA
5.Michigan Technol Univ, Dept Phys, Houghton, MI 49931 USA
6.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Inst Geol & Geophys, Beijing, Peoples R China
7.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA
8.Yachay Tech Univ, Sch Geol Sci & Engn, Ibarra, Ecuador
Recommended Citation
GB/T 7714
Kulakov, E., V,Sprain, C. J.,Doubrovine, P., V,et al. Analysis of an Updated Paleointensity Database (Q(PI)-PINT) for 65-200 Ma: Implications for the Long-Term History of Dipole Moment Through the Mesozoic[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2019,124(10):9999-10022.
APA Kulakov, E., V.,Sprain, C. J..,Doubrovine, P., V.,Smirnov, A., V.,Paterson, G. A..,...&Biggin, A. J..(2019).Analysis of an Updated Paleointensity Database (Q(PI)-PINT) for 65-200 Ma: Implications for the Long-Term History of Dipole Moment Through the Mesozoic.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,124(10),9999-10022.
MLA Kulakov, E., V,et al."Analysis of an Updated Paleointensity Database (Q(PI)-PINT) for 65-200 Ma: Implications for the Long-Term History of Dipole Moment Through the Mesozoic".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 124.10(2019):9999-10022.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Kulakov, E., V]'s Articles
[Sprain, C. J.]'s Articles
[Doubrovine, P., V]'s Articles
Baidu academic
Similar articles in Baidu academic
[Kulakov, E., V]'s Articles
[Sprain, C. J.]'s Articles
[Doubrovine, P., V]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Kulakov, E., V]'s Articles
[Sprain, C. J.]'s Articles
[Doubrovine, P., V]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.