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Earth, Planets and Space

Table 3 Rock magnetic properties and bulk grain density of the studied volcanic rock samples from the Irabu knolls of the Okinawa Trough; 6K#562R1, 6K#569R4-1, 6K#569R4-2, and 6K#569R4-3

From: Seafloor hydrothermal alteration affecting magnetic properties of abyssal basaltic rocks: insights from back-arc lavas of the Okinawa Trough

Sample name

ρ (kg/m3)

σρ (kg/m3)

NRM (A/m)

σNRM (A/m)

K (SI)

σK (SI)

Q

Tc (°C)

x

Ms (Am2/kg)

Rep. Hcr/Hc

Rep. Mrs/Ms

Magnetic domain state

6K#562R1

2.89

0.01

13.0

3.2

0.0607

0.0016

7

420

0.26

1.81

2.72

0.10

PSD

6K#569R4-1

2.71

0.04

0.8

0.5

0.0021

0.0008

12

  

0.03

2.40

0.17

PSD

6K#569R4-2

2.85

0.02

88.7

6.5

0.0138

0.0013

202

420

0.26

0.63

1.18

0.47

SD

6K#569R4-3

2.89

0.01

28.2

16.2

0.0242

0.0098

37

540

0.06

1.25

1.83

0.24

PSD

  1. ρ, bulk grain density. σρ, standard deviation of ρ. NRM, natural remanent magnetization. σNRM, standard deviation of NRM. K, magnetic susceptibility. σK, standard deviation of K. Q, Koenigsberger ratio. Tc, Curie temperature. x, titanium content of Fe3-xTixO4 estimated from Curie temperature
  2. Ms saturation magnetization, Hcr remanent coercivity, Hc coercivity, Mr saturation remanent magnetization, Rep representative
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