(Table T1) Magnetic properties of MORB from ODP Leg 187 sites ...

The core samples of mid-ocean-ridge basalts (including Indian and Pacific type) recovered from the Southeast Indian Ridge (SEIR) area near the Australian Antarctic Discordance during Ocean Drilling Program Leg 187 were studied using rock magnetism, mineralogy, and petrography methods. On the basis o...

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Bibliographic Details
Main Authors: Shau, Yen-Hong, Torii, Masayuki, Horng, Chorng-Shern, Liang, Wen-Tzong
Format: Dataset
Language:English
Published: PANGAEA 2004
Subjects:
Event label
Sample code/label
Sample ID
Sample comment
Depth, relative
NRM, Intensity
Magnetic susceptibility, volume
Hysteresis, saturation remanence, per unit volume
Hysteresis, saturation magnetization, per unit volume
Hysteresis, saturation magnetization/ saturation remanence
Coercive force
Coercivity of remanence
Coercivity of remanence/coercive force
Curie temperature
Drilling/drill rig
DSDP/ODP/IODP sample designation
Magnetometer, spinner SMD-88
Bartington MS2 magnetic susceptibility meter
Magnetometer
Leg187
Joides Resolution
Ocean Drilling Program ODP
Antarctic
Pacific
Indian
Southeast Indian Ridge
Australian-Antarctic Discordance
Antarc*
Online Access:https://dx.doi.org/10.1594/pangaea.780754
https://doi.pangaea.de/10.1594/PANGAEA.780754
Description
Summary:The core samples of mid-ocean-ridge basalts (including Indian and Pacific type) recovered from the Southeast Indian Ridge (SEIR) area near the Australian Antarctic Discordance during Ocean Drilling Program Leg 187 were studied using rock magnetism, mineralogy, and petrography methods. On the basis of thermomagnetic analyses and low-temperature magnetometry, the dominant magnetic carrier in most of the basalt samples (pillow basalts) is characterized as titanomaghemite, which presumably formed by low-temperature oxidation of primary titanomagnetite. Some samples from unaltered massive basalts contain nearly unoxidized titanomagnetite as the main magnetic mineral. A metadiabase sample showing greenschist facies metamorphism contains magnetic minerals dominated by magnetite. The pillow basalts contain titanomaghemite ranging from stable single-domain to pseudosingle-domain (PSD) grains, and the majority are characterized by a single stable component of remanence. The massive basalts show hysteresis features of ... : Mantle province and sample depth data are from Shipboard Scientific Party (2001, doi:10.2973/odp.proc.ir.187.101.2001). ...

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