Cited by 105Geological and Geochemical AnalysisPaleontology and Stratigraphy of FossilsGeochemistry and Elemental Analysis

SHRIMP U–Pb zircon ages of tuffaceous mudrocks in the Brockman Iron Formation of the Hamersley Range, Western Australia

Pickard, A. L.·2002·Australian Journal of Earth Sciences

Abstract

Tuffaceous mudrocks are common in the banded iron‐formations (BIF) of the Brockman Iron Formation. These tuffaceous mudrocks are either stilpnomelane‐rich or siliceous. Their compositions reflect bimodal volcanic activity in the vicinity of the Hamersley BIF depositional site. They also contain complex zircon populations that record resedimentation, syndepositional volcanism and post‐depositional isotopic disturbance. The best estimates of depositional age are obtained from siliceous tuffaceous mudrocks in the Joffre Member that contain 2459 ± 3 Ma and 2454 ± 3 Ma zircon populations most likely derived from felsic volcanism coeval with BIF deposition. These dates constrain the sedimentation rates for the ∼370 m‐thick Joffre Member BIF to >15 m per million years. Siliceous tuffaceous mudrocks are not present in the underlying ∼120 m‐thick Dales Gorge Member and it is uncertain whether previously reported ages of ca 2479–2470 Ma for this unit reflect detrital/xenocrystic or syndepositional zircon populations in resedimented stilpnomelane‐rich tuffaceous mudrocks. The increased abundance of tuffaceous mudrocks in the Joffre Member suggests that a pulse of enhanced igneous and hydrothermal activity accompanied deposition of the bulk of the Brockman Iron Formation BIF after ca 2460 Ma. This preceded and culminated in the emplacement of the 2449 ± 3 Ma large igneous province represented by BIF and igneous rocks of the Weeli Wolli Formation and Woongarra Rhyolite.

Integrity signals

Registry

Crossref · 10.1046/j.1440-0952.2002.00933.x

Cites

27 of 27 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Pickard, A. L.
Affiliations
The University of Western Australia (AU)
Corresponding author
Pickard, A. L.
Venue
Australian Journal of Earth Sciences
Published
2002-06
Volume
49
Issue
3
Pages
491-507
ISSN
  • 0812-0099 (ISSN-L)
  • 1440-0952
OpenAlex
W2102206761
Cited by
105
References
27
Citations by year
2026: 1 · 2025: 7 · 2024: 6 · 2023: 3 · 2022: 5 · 2021: 2 · 2020: 4 · 2019: 6 · 2018: 8 · 2017: 6 · 2016: 6 · 2015: 1 · 2014: 5 · 2013: 6 · 2012: 4
FWCI
5.40
Type
journal article
Language
en
Open access
closed
Locations
  • Australian Journal of Earth Sciences (publishedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion)
Funders
  • Minerals and Energy Research Institute of Western Australia
  • Curtin University of Technology
  • Geological Survey of Western Australia
Topics
  • Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
Keywords
banded iron formations, Hamersley Range, zircon U-Pb geochronology, stilpnomelane, sedimentation rate, resedimentation, felsic volcanism, large igneous provinces, Precambrian stratigraphy, hydrothermal activity

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review