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Metadata Files

Data Publication

2D grain size data of sandstones from the 3.2 Ga old Moodies Group, Barberton Greenstone Belt (South Africa)

Reimann, Sebastian | Zametzer, Andreas | Heubeck, Christoph

GFZ Data Services

(2023)

Descriptions

The Moodies Group (ca. 3.22-3.21 Ga) of the Barberton Greenstone Belt (BGB), South Africa, is the uppermost and youngest unit of the BGB, the largest and best-preserved Greenstone belt in the basement of the Kaapvaal Craton. It consists predominantly of fine- to coarse-grained, composi-tionally immature to mature, quartzose sandstones up to 3.6 km thick, with significant units of con-glomerates and siltstones and minor volcanic rocks and ferruginous sediments. The quartz-dominated Moodies sandstones mark long-term, large-scale access of surface systems to crust-stabilizing, high-level granitoid igneous rocks. 47 petrographic thin sections of sandstones from these sandstone units were analyzed for 2D grain size analyses. At least 500 measurements of long axes per thin were taken, using a Keyence VHX-6000 digital microscope. Samples which show significant grain boundary migration and subgrain rotation were excluded from this analysis (Passchier and Trouw, 2005). The data are presented as single ASCII file (tab-delimited text). The file 2022-023_Reimann-et-al_2D-grain-size-data.txt contains measurements of grains long axes from thin sections.
47 petrographic thin sections of sandstones from these sandstone units were analyzed for 2D grain size analyses. At least 500 measurements of long axes per thin were taken, using a Keyence VHX-6000 digital microscope. Samples which show significant grain boundary migration and subgrain rotation were excluded from this analysis (Passchier and Trouw, 2005). The determination of grain size from 2D sections is widely discussed in literature (e.g., Gundersen and Jensen, 1985; Kellerhals et al., 1975; Rosenfeld et al., 1953) and requires correction. We used the approach described by Harrell and Eriksson (1979) who provide thin-section-to-sieve correla-tion equations for the correction of textural parameters and the correction of cumulative percen-tiles. Both approaches generate similar values which changes their classification rarely (Folk, 1974). The data is then compared to recent eolian sands and further discussed in Reimann et al. (2023) and Zametzer et al. (2023) to which these data are supplementary material.

Keywords


Originally assigned keywords
Archean
eolianites
2D grain size analysis
analysis > physicochemical analysis > granulometry
EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > AEOLIAN PROCESSES
Precambrian > Archean

Corresponding MSL vocabulary keywords
Archean

MSL enriched keywords
Precambrian
Archean
sedimentary rock
sandstone
Analyzed feature
grain size and configuration
grain size
mudstone
siltstone
minerals
silicate minerals
tectosilicates
quartz
intraplate setting
cratonisation
craton
deformation microstructure
crystal plastic microstructure
subgrains
Inferred parameter
inferred mechanisms
inferred recrystallization mechanisms
subgrain rotation
grain boundary migration

MSL enriched sub domains i

microscopy and tomography

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=9f30d13d-2718-11ee-95b8-f851ad6d1e4b

Source publisher

GFZ Data Services


DOI

10.5880/fidgeo.2022.023


Creators

Reimann, Sebastian

Friedrich-Schiller-Universität Jena, Jena, Germany

ORCID:

https://orcid.org/0000-0001-9484-5044

Zametzer, Andreas

Friedrich-Schiller-Universität Jena, Jena, Germany | Timescales of Mineral Systems Group, The Institute for Geoscience Research (TIGeR), Curtin University, Perth, Australia

ORCID:

https://orcid.org/0000-0002-5700-3638

Heubeck, Christoph

Friedrich-Schiller-Universität Jena, Jena, Germany

ORCID:

https://orcid.org/0000-0002-2632-2644


Contributors

Reimann, Sebastian

ContactPerson

Friedrich-Schiller-Universität Jena, Jena, Germany

ORCID:

https://orcid.org/0000-0001-9484-5044

Zametzer, Andreas

ProjectMember

Friedrich-Schiller-Universität Jena, Jena, Germany | Timescales of Mineral Systems Group, The Institute for Geoscience Research (TIGeR), Curtin University, Perth, Australia

ORCID:

https://orcid.org/0000-0002-5700-3638

Heubeck, Christoph

Supervisor

Friedrich-Schiller-Universität Jena, Jena, Germany

ORCID:

https://orcid.org/0000-0002-2632-2644

Reimann, Sebastian

ContactPerson

Friedrich-Schiller-Universität Jena, Jena, Germany


References

10.25131/sajg.126.0016

https://hdl.handle.net/2152/22930

10.1306/74d70646-2b21-11d7-8648000102c1865d

10.1111/j.1365-2818.1985.tb02607.x

10.1306/212f7711-2b24-11d7-8648000102c1865d

10.1086/628046

https://link.springer.com/book/10.1007/3-540-29359-0

10.1086/626060


Citation

Reimann, S., Zametzer, A., & Heubeck, C. (2023). 2D grain size data of sandstones from the 3.2 Ga old Moodies Group, Barberton Greenstone Belt (South Africa) [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2022.023


Dates

Available:

2022-09-01

Created:

2022-05-09

Issued:

2023


Funding References

Funder name: Deutsche Forschungsgemeinschaft

Funder identifier: https://doi.org/10.13039/501100001659

Funder identifier type: Crossref Funder ID

Award number: He2418/17-1 and He2418/22-1


Rights

Creative Commons Attribution 4.0 International


Geo location(s)

Barberton Greenstone Belt


Spatial coordinates