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Metadata Files

Data Publication

Quantitative mineralogy, mineral chemistry and microtex-tural data on the UG2 chromitite intruded by iron-rich ul-tramafic pegmatite (IRUP) at the Thaba Mine, northwest-ern Bushveld Complex, South Africa

Zhou, Haoyang | Appelt, Oona | Tjallingii, Rik | Bachmann, Kai | Trumbull, Robert B.

GFZ Data Services

(2023)

Descriptions

Discordant iron-rich ultramafic pegmatites (IRUPs) intersect the UG2 chromitite at many places in the Bushveld Complex but the effects on ore grade and mineralogy have rarely been studied in detail. We investigated a drillcore profile through the UG2 layer affected by IRUP intrusions at Tha-ba mine, NW Bushveld. The work involved quantitative assessment of the ore mineralogy from mineral liberation analysis (MLA), chemical analyses of the main silicate and oxide minerals by elec-tron microprobe (EPMA) and micro-X-ray fluorescence (micro-XRF) element maps of the UG2-IRUP contacts. The data reveal features of UG2-IRUP interaction at different scales. The micro-XRF study of the contacts shows that a thin layer of Fe-Ti-Cr spinel and ilmenite formed on the IRUP side, while chromite on the UG2 side underwent grain coarsening with loss of interstitial space, and developed chemical gradients in Cr, Al, Fe and Ti. On a larger scale, the MLA data document changes in ore and gangue mineral assemblages through most of the meter-thick UG2 layer. This includes formation of secondary hydrous silicates, replacement of PGE- sulfides by PGE alloys and PGE- As-Sb-Bi-Te-Pb phases, and formation of secondary Ni-Cu-Fe sulfides after pentlandite and chalcopyrite.

Keywords


MSL enriched keywords
igneous rock - intrusive
acidic intrusive
pegmatite
minerals
chemical elements
iron
measured property
iron
Analyzed feature
mineralogy and composition
quantitative mineralogy
sulfide minerals
chalcopyrite
pentlandite
oxide mineral
chromite
ilmenite
spinel
equipment
electron probe micro-analyzer
x-ray spectrometer
x-ray fluorescence spectrometer
aluminium
chromium
Apparatus
microchemical analysis
electron probe micro analyser
Equipment
borehole drilling
drill core

MSL enriched sub domains i

geochemistry
microscopy and tomography
geo-energy test beds

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=ce26d0d3-ee30-11ec-9531-ca1f3ed77ce8

Source publisher

GFZ Data Services


DOI

10.5880/gfz.3.1.2022.005


Creators

Zhou, Haoyang

Natural History Museum, University of Oslo, Oslo, Norway | GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0002-0079-503X

Appelt, Oona

GFZ German Research Centre for Geosciences, Potsdam, Germany

Tjallingii, Rik

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0002-9723-3622

Bachmann, Kai

Helmholtz-Centre Dresden-Rossendorf, Helmholtz Institute Freiberg of Resource Technology, Freiberg, Germany

Trumbull, Robert B.

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0002-1999-4653


Contributors

Microprobe Lab (GFZ German Research Centre For Geosciences, Germany)

HostingInstitution

GFZ German Research Centre for Geosciences, Potsdam, Germany

Laboratory For XRF Element Scanning ((GFZ German Research Centre For Geosciences, Germany)

HostingInstitution

GFZ German Research Centre for Geosciences, Potsdam, Germany

Trumbull, Robert B.

ContactPerson

GFZ German Research Centre for Geosciences, Potsdam, Germany


References

10.1007/s00126-023-01167-x

10.1017/s1431927617000460

10.3749/canmin.1700094

10.1016/j.minpro.2006.07.018

10.1007/s00710-014-0363-1


Citation

Zhou, H., Appelt, O., Tjallingii, R., Bachmann, K., & Trumbull, R. B. (2023). Quantitative mineralogy, mineral chemistry and microtex-tural data on the UG2 chromitite intruded by iron-rich ul-tramafic pegmatite (IRUP) at the Thaba Mine, northwest-ern Bushveld Complex, South Africa [Data set]. GFZ Data Services. https://doi.org/10.5880/GFZ.3.1.2022.005


Dates

Issued:

2023


Funding References

Funder name: Bundesministerium für Bildung und Forschung

Funder identifier: https://doi.org/10.13039/501100002347

Funder identifier type: Crossref Funder ID

Award number: 033R199

Award title: AMREP


Rights

Creative Commons Attribution 4.0 International


Geo location(s)

Thaba Mine, northwestern Bushveld Complex, South Africa