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Metadata Files

Data Publication

Differentiating between hydrothermal and diagenetic carbonates using rare earth element and yttrium (REE+Y) geochemistry: A case study from the Paleoproterozoic George Fisher massive sulphide Zn deposit

Rieger, Philip | Magnall, Joseph M. | Gleeson, Sarah A. | Oelze, Marcus | Wilke, Franziska D.H. | Lilly, Richard

GFZ Data Services

(2021)

Descriptions

Carbonate minerals are ubiquitous in most sediment-hosted mineral deposits. These deposits can contain a variety of carbonate types with complex paragenetic relationships. When normalized to chondritic values (CN), rare-earth elements and yttrium (REE+YCN) can be used to constrain fluid chemistry and fluid-rock interaction processes in both low- and high-temperature settings. Unlike other phases (e.g., pyrite), the application of in situ laser ablation-inductively coupled plasma-mass spectroscopy (LA-ICP-MS) data to the differentiation of pre-ore and hydrothermal carbonates remains relatively untested. To assess the potential applicability of carbonate in situ REE+Y data, we combined transmitted light and cathodoluminescence (CL) petrography with LA-ICP-MS analysis of carbonate mineral phases from (1) the Proterozoic George Fisher clastic dominated (CD-type) massive sulfide deposit and from (2) correlative, barren host rock lithologies (Urquhart Shale Formation). The REE+YCN composition of pre-ore calcite suggests it formed during diagenesis from diagenetic pore fluids derived from ferruginous, anoxic seawater. Hydrothermal and hydrothermally altered calcite and dolomite from George Fisher is generally more LREE depleted than the pre-ore calcite, whole-rock REE concentrations, and shale reference values. We suggest this is the result of hydrothermal alteration by saline Cl--rich mineralizing fluids. Furthermore, the presence of both positive and negative Eu/Eu* values in calcite and dolomite indicates that the mineralizing fluids were relatively hot (>250°C) and cooled below 200-250°C during ore formation. This study confirms the hypothesis that in situ REE+Y data can be used to differentiate between pre-ore and hydrothermal carbonate and provide important constraints on the conditions of ore formation.

Keywords


Originally assigned keywords
rare earth elements
CD-type massive sulphide deposit
SEDEX massive sulphide deposit
hydrothermal alteration
hydrothermal ore formation
Proterozoic
sedimentary basin
Mount Isa
George Fisher
Carpentaria Province
EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > MARINE GEOCHEMISTRY
In Situ/Laboratory Instruments > Spectrometers/Radiometers > LA-ICP-MS

Corresponding MSL vocabulary keywords
Proterozoic

MSL enriched keywords
Precambrian
Proterozoic
minerals
carbonate minerals
Paleoproterozoic
measured property
yttrium
zinc
sedimentary rock
dolomite
mudstone
shale
sulfide minerals
pyrite
calcite
dolomite
Measured property
coupled mechanical-chemical effects
Measured property
fluid-rock interaction
equipment
mass spectrometer
inductively coupled plasma-mass spectrometer
laser ablation-inductively coupled plasma-mass spectrometry
Technique
imaging (2D)
cathodoluminescence (CL) imaging

MSL enriched sub domains i

geochemistry
rock and melt physics
analogue modelling of geologic processes
microscopy and tomography

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=74c33094-b25f-11eb-9603-497c92695674

Source publisher

GFZ Data Services


DOI

10.5880/gfz.3.1.2020.005


Creators

Rieger, Philip

GFZ German Research Centre for Geosciences, Potsdam, Germany | Institute of Geological Sciences, Freie Universität Berlin, Berlin, Germany

ORCID:

https://orcid.org/0000-0001-7888-0077

Magnall, Joseph M.

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0002-7868-3038

Gleeson, Sarah A.

GFZ German Research Centre for Geosciences, Potsdam, Germany | Institute of Geological Sciences, Freie Universität Berlin, Berlin, Germany

ORCID:

https://orcid.org/0000-0002-5314-4281

Oelze, Marcus

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0002-3950-6629

Wilke, Franziska D.H.

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0002-3463-6176

Lilly, Richard

Department of Earth Sciences, University of Adelaide, Adelaide, Australia

ORCID:

https://orcid.org/0000-0001-9111-2056


Contributors

Elemental Mapping By LA-ICP-MS (GFZ German Research Centre For Geosciences, Germany)

HostingInstitution

GFZ German Research Centre for Geosciences, Potsdam, Germany

Rieger, Philip

ContactPerson

GFZ German Research Centre for Geosciences, Potsdam, Germany


References

10.1007/s00126-021-01056-1

10.1039/c1ja10172b

10.1111/j.1751-908x.2007.00104.x


Citation

Rieger, P., Magnall, J. M., Gleeson, S. A., Oelze, M., Wilke, F. D. H., & Lilly, R. (2021). Differentiating between hydrothermal and diagenetic carbonates using rare earth element and yttrium (REE+Y) geochemistry: A case study from the Paleoproterozoic George Fisher massive sulphide Zn deposit [Data set]. GFZ Data Services. https://doi.org/10.5880/GFZ.3.1.2020.005


Dates

Issued:

2021


Rights

Creative Commons Attribution 4.0 International