Geology and Mars analog potential of the <2.7-billion-year-old Miralga impact structure, North Pole Dome, Pilbara Craton, Australia.

Alec R Brenner, Aaron J Cavosie, Jasmine Palma-Gomez, Joanna Li, Sophie-An Kingsbury Lee, Roger R Fu

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Article in Science advances, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Alec R BrennerDepartment of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA.ORCID 0000-0003-4739-7757

Aaron J CavosieSpace Science and Technology Centre, School of Earth and Planetary Science, Curtin University, Perth, WA, Australia.ORCID 0000-0001-6819-6810

Jasmine Palma-GomezDepartment of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA.

Joanna LiSmith College, Northampton, MA, USA.

Sophie-An Kingsbury LeeDepartment of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA.ORCID 0000-0002-5115-6115

Roger R FuDepartment of Earth and Planetary Sciences, Harvard University, Cambridge, MA, USA.ORCID 0000-0003-3635-2676

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

North Pole Dome (Pilbara Craton, Western Australia) contains unique geological analogs to early Earth and Mars. Recently discovered shatter cones in 3.47-billion-year-old (Ga) rocks reveal that it is also the site of an ancient meteorite impact. Initial reports claimed that the impact occurred at 3.47 Ga and produced a ≥100-kilometer (km) crater; we show that these age and size estimates are inaccurate. Shatter cones are radially oriented over a 6.5-km-diameter area, defining a 16-km-wide structure. Shatter cones postdate regional structures and occur in younger overlying rocks, providing unambiguous evidence that the impact occurred after ~2.7 Ga. We also report the first shocked mineral from this site, the high-pressure TiO

Identifiers

PMID40632870

DOI10.1126/sciadv.adu5379

PMCPMC12239947

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