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the claim

The Acasta Gneiss was metamorphosed between 3.58 and 4.031 billion years ago.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that the Acasta Gneiss was metamorphosed between 3.58 and 4.031 billion years ago?

Yes. Geological evidence from the Acasta Gneiss Complex confirms the presence of ancient crust spanning from approximately 4.0 billion years ago into the Eoarchean.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

The analysis

The retrieved papers consistently reference the Acasta Gneiss as containing some of Earth's oldest rocks, with radiometric dating and isotopic analyses placing its formation and early metamorphic/magmatic history within the claimed timeframe (around 4.0 Ga and younger).

Evidence for · 3
No evidence of supracrustal recycling in Si-O isotopes of Earth's oldest rocks 4 Ga ago.
2023
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Q, Z., L, Z., D, Z., AP, N., RN, M., Y, L., QL, L., HM, Y., B, F., CJ, S., & XH, L. (2023). No evidence of supracrustal recycling in Si-O isotopes of Earth's oldest rocks 4 Ga ago.. doi.org. https://doi.org/10.1126/sciadv.adf0693

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More for · 2
Titanium isotopes constrain a magmatic transition at the Hadean-Archean boundary in the Acasta Gneiss Complex.
2020
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SM, A., JR, R., ND, G., AW, H., Z, Z., & N, D. (2020). Titanium isotopes constrain a magmatic transition at the Hadean-Archean boundary in the Acasta Gneiss Complex.. doi.org. https://doi.org/10.1126/sciadv.abc9959

Zircon geochemistry from early evolved terranes records coeval stagnant- and mobile-lid tectonic regimes.
2024
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EE, M., AM, B., TB, B., JW, V., H, R., J, O., & K, K. (2024). Zircon geochemistry from early evolved terranes records coeval stagnant- and mobile-lid tectonic regimes.. doi.org. https://doi.org/10.1073/pnas.2405378121

What does the evidence say?

The retrieved papers consistently reference the Acasta Gneiss as containing some of Earth's oldest rocks, with radiometric dating and isotopic analyses placing its formation and early metamorphic/magmatic history within the claimed timeframe (around 4.0 Ga and younger).

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