Last 3000 years of geomagnetic field intensity from India: New reference palaeointensity data from two east coast archaeological sites and archaeomagnetic dating insights

Basavaiah, N.; Deenadayalan, K.; Babu, J.L.V. Mahesh; Kanu, M. O.; Kumar, K. Ch. V. Naga; Demudu, G.; Rao, K. Nageswara; Mallikarjunarao, N.

doi:10.1016/j.jasrep.2019.101943

Cited by 3 publications

(1 citation statement)

References 61 publications

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“…This includes the large and growing data set from Mexico (see, Hervé et al, 2019b,c;Mahgoub et al, 2019). New studies from India (Basavaiah et al, 2019;Deenadayalan et al, 2020), western Africa (Kapper et al, 2017(Kapper et al, , 2020 and eastern Africa (Osete et al, 2015) have contributed important intensity data from areas that are isolated from others globally. As we move closer to the equator the amount of available data shrinks with <2% of database entries from between 10  latitude.…”

Section: Spatial Distribution Of Archaeomagnetic Datamentioning

confidence: 99%

Global archaeomagnetic data: The state of the art and future challenges

Brown

Hervé

Korte

et al. 2021

Physics of the Earth and Planetary Interiors

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Section: Spatial Distribution Of Archaeomagnetic Datamentioning

confidence: 99%

Global archaeomagnetic data: The state of the art and future challenges

Brown

Hervé

Korte

et al. 2021

Physics of the Earth and Planetary Interiors

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Vein width measurement of groundwater on Earth's surface using Semiconductor Laser Light and Proton Precession Magnetometer

Dharmadhikari¹,

Muthekar²,

Mahajan³

et al. 2019

Journal of Applied Geophysics

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Rock-magnetic and archaeomagnetic investigations on archaeological artefacts from Maharashtra, India

Deenadayalan

Gawali

Lakshmi

et al. 2020

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Archaeointensity and rock-magnetic studies were undertaken on 49 baked clay artefacts from four archaeological sites (Ter, Junnar, Nalasopara and Kanheri) in Maharashtra, India. Rock-magnetic properties, including bulk magnetic susceptibility, magnetic remanence and thermomagnetic analysis, indicate the presence of a low-coercivity magnetite in fine (superparamagnetic, single domain) grain-sizes. The ratio of anhysteretic remanent magnetization to saturation isothermal remanent magnetization, the reversible high-temperature susceptibility curves and the 3-axes isothermal remanent magnetization tests also indicate that the artefacts dominantly possess fine-grained magnetic particles, carrying a stable thermoremanent magnetization (TRM). Archaeointensity was estimated using Coe's modified Thellier method corresponding to the linear behaviour of natural remanent magnetization loss and TRM gained plots, which were evaluated with ThellierTool4.0 software. Cooling rate and anisotropy of the TRM corrections were applied and the corrected intensities were used to calculate a mean archaeointensity value for each one of the four sites. The new archaeointensity values were plotted along the existing Indian archaeointensity values derived only from archaeological artefacts, and were compared with the SHA.DIF.14k and ARCH10k.1 global models’ predictions. The present study aims to improve the overall understanding of Indian geomagnetic field variation in the past by providing new high-quality archaeointensity results. However, still more archaeointensity values are required to develop a reliable secular variation curve for India.

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Last 3000 years of geomagnetic field intensity from India: New reference palaeointensity data from two east coast archaeological sites and archaeomagnetic dating insights

Cited by 3 publications

References 61 publications

Global archaeomagnetic data: The state of the art and future challenges

Global archaeomagnetic data: The state of the art and future challenges

Vein width measurement of groundwater on Earth's surface using Semiconductor Laser Light and Proton Precession Magnetometer

Rock-magnetic and archaeomagnetic investigations on archaeological artefacts from Maharashtra, India

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Last 3000 years of geomagnetic field intensity from India: New reference palaeointensity data from two east coast archaeological sites and archaeomagnetic dating insights

Cited by 3 publications

References 61 publications

Global archaeomagnetic data: The state of the art and future challenges

Global archaeomagnetic data: The state of the art and future challenges

Vein width measurement of groundwater on Earth's surface using Semiconductor Laser Light and Proton Precession Magnetometer

Rock-magnetic and archaeomagnetic investigations on archaeological artefacts from Maharashtra, India

Contact Info

Product

Resources

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Last 3000 years of geomagnetic field intensity from India: New reference palaeointensity data from two east coast archaeological sites and archaeomagnetic dating insights