Data for the study: Decrypting magnetic fabrics (AMS, AARM, AIRM) through the analysis of mineral shape fabrics and distribution anisotropy

Creator/Principal investigator(s)

Tobias Mattsson - Stockholm University, Department of Geological Sciences orcid

Benoît Petri - Université de Strasbourg, CNRS orcid

Bjarne Almqvist - Uppsala University, Department of Earth Sciences orcid

Description

Anisotropy of magnetic susceptibility (AMS) and anisotropy of remanence magnetization (AARM and AIRM) are efficient and versatile techniques to indirectly determine rock fabrics. Yet, deciphering the source of a magnetic fabric remains a crucial and challenging step, notably in the presence of ferrimagnetic phases. Here we use X-ray micro-computed tomography to directly compare magnetite and amphibole Shape-Preferred Orientation and spatial distribution data to AMS, AARM and AIRM data from five hypabyssal trachyandesite samples. This study thus reports quantitative petrofabric data on magnetite shape and distribution anisotropy on magnetic fabrics in igneous rocks. Our results have first-order implications for the interpretation of petrofabrics using magnetic methods.

Principal organisation

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CB-15.ams (3.13 KB)
CB-15_AMS.csv (1.04 KB)
CB-19.ams (3.13 KB)
CB-19_AMS.csv (1.03 KB)
CB-46.ams (3.75 KB)
CB-46_AMS.csv (1.21 KB)
CB-55.ams (6.88 KB)
CB-55_AMS.csv (2.09 KB)
CB-61.ams (3.75 KB)
CB-61_AMS.csv (1.19 KB)
CB15_A1.jr6 (7.05 KB)
CB19-A1.jr6 (10.57 KB)
CB46-A1.jr6 (6.81 KB)
CB55-A1.jr6 (6.72 KB)
CB61-B2.jr6 (7.21 KB)
CB_TX.csv (89.02 KB)
Info.txt (2.04 KB)
JR6_data.csv (15.68 KB)

Creator/Principal investigator(s)

Tobias Mattsson - Stockholm University, Department of Geological Sciences orcid

Benoît Petri - Université de Strasbourg, CNRS orcid

Bjarne Almqvist - Uppsala University, Department of Earth Sciences orcid

Identifiers

SND-ID: 2021-44

Description

Anisotropy of magnetic susceptibility (AMS) and anisotropy of remanence magnetization (AARM and AIRM) are efficient and versatile techniques to indirectly determine rock fabrics. Yet, deciphering the source of a magnetic fabric remains a crucial and challenging step, notably in the presence of ferrimagnetic phases. Here we use X-ray micro-computed tomography to directly compare magnetite and amphibole Shape-Preferred Orientation and spatial distribution data to AMS, AARM and AIRM data from five hypabyssal trachyandesite samples. This study thus reports quantitative petrofabric data on magnetite shape and distribution anisotropy on magnetic fabrics in igneous rocks. Our results have first-order implications for the interpretation of petrofabrics using magnetic methods.

Language

English

Time period(s) investigated

2018-06-01 — ongoing

Geographic spread

Geographic location: Argentina

Geographic description: Samples were collected from the Chachahuén volcanic complex in the Neuquèn basin in Argentina.

Data contains personal data

No

Funding

Funding agency: Swedish Research Council

Funding agency’s reference number: 2019-06300

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Version 1

Download citation

Download data

CB-15.ams (3.13 KB)
CB-15_AMS.csv (1.04 KB)
CB-19.ams (3.13 KB)
CB-19_AMS.csv (1.03 KB)
CB-46.ams (3.75 KB)
CB-46_AMS.csv (1.21 KB)
CB-55.ams (6.88 KB)
CB-55_AMS.csv (2.09 KB)
CB-61.ams (3.75 KB)
CB-61_AMS.csv (1.19 KB)
CB15_A1.jr6 (7.05 KB)
CB19-A1.jr6 (10.57 KB)
CB46-A1.jr6 (6.81 KB)
CB55-A1.jr6 (6.72 KB)
CB61-B2.jr6 (7.21 KB)
CB_TX.csv (89.02 KB)
Info.txt (2.04 KB)
JR6_data.csv (15.68 KB)

License

Creative Commons  Attribution 4.0 International (CC BY 4.0)

Data generated during the study: Decrypting magnetic fabrics (AMS, AARM, AIRM) through the analysis of mineral shape fabrics and distribution anisotropy

Citation

Tobias Mattsson, Benoît Petri, Bjarne Almqvist. Stockholm University, Department of Geological Sciences (2021). <em>Data generated during the study: Decrypting magnetic fabrics (AMS, AARM, AIRM) through the analysis of mineral shape fabrics and distribution anisotropy</em>. Swedish National Data Service. Version 1. <a href="https://doi.org/10.5878/s045-mt81">https://doi.org/10.5878/s045-mt81</a>

Creator/Principal investigator(s)

Tobias Mattsson - Stockholm University, Department of Geological Sciences orcid

Benoît Petri - Université de Strasbourg, CNRS orcid

Bjarne Almqvist - Uppsala University, Department of Earth Sciences orcid

Description

Data generated during the study Mattsson et al. 'Decrypting magnetic fabrics (AMS, AARM, AIRM) through the analysis of mineral shape fabrics and distribution anisotropy'

-MicroXCT mineral data extracted from the software Blob3D are given in spreadsheet named after the samples. The data files named TT_XX.xls can be opened with the software Tomofab (Petri et al. 2020). The data include extracted grain volume and XYZ position in mm, XYZ radius length in mm, and XYZ orientation in directional cosin

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Keywords

Data format / data structure

Text

Other

Data collection

Description of the mode of collection: Description of mode of collection given in description of data

Time period(s) for data collection: 2018-06-10

Instrument: Agico Kappabridge KLY5

Instrument: Agico Kappabridge MFK1-FA

Instrument: Nikon Metrology XT H 225 ST X-ray microtomograph

Instrument: AGICO’s LDA5 and PAM1

Instrument: MMPM 10

Instrument: Agico JR6-a spinner magnetometer

Time period(s) investigated

2018-06-01 — ongoing

Variables

80

Published: 2021-03-01