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Evidence for diverse anaerobic metabolisms in 3.7-billion-year-old marine detrital sediments

Organic debris from organisms living in the ocean water column was used as substrate for microbes carrying out anaerobic respiration within the oldest known detrital sediments on Earth, according to isotopic and petrological analysis.

Austin Jarl Boyd
Magnus August Ravn Harding
Tue Hassenkam
ResearchOpen Access13 Jan 2026
Communications Earth & Environment

P: 1-10
Visualizing RNA polymers produced by hot wet-dry cycling

Tue Hassenkam
David Deamer
ResearchOpen Access23 Jun 2022
Scientific Reports

Volume: 12, P: 1-11
PICH and TOP3A cooperate to induce positive DNA supercoiling

PICH and Topoisomerase 3a together introduce positive supercoiling into DNA, which could aid efficient sister-chromatid disjunction during mitosis.

Anna H. Bizard
Jean-Francois Allemand
Ian D. Hickson
Research01 Apr 2019
Nature Structural & Molecular Biology

Volume: 26, P: 267-274
Sacrificial bonds and hidden length dissipate energy as mineralized fibrils separate during bone fracture

Georg E. Fantner
Tue Hassenkam
Paul K. Hansma
Research17 Jul 2005
Nature Materials

Volume: 4, P: 612-616
Preserved carbon isotope compositions in 3.7 billion year old detrital organic matter from the Isua Supracrustal Belt

Detrital biogenic graphite may signal the Earth’s oldest evidence of life, according to the results from carbon isotope analysis of graphite in 3.7-billion-year-old sediments from the Isua Supracrustal Belt in Southwest Greenland, using secondary ion mass spectrometry.

Magnus A. R. Harding
Austin Jarl Boyd
Tue Hassenkam
ResearchOpen Access28 Mar 2025
Communications Earth & Environment

Volume: 6, P: 1-11
Amide groups in 3.7 billion years old liquid inclusions

Magnus August Ravn Harding
Austin Jarl Boyd
Tue Hassenkam
ResearchOpen Access05 Oct 2024
Scientific Reports

Volume: 14, P: 1-10
Elements of Eoarchean life trapped in mineral inclusions

In situ infrared spectroscopy maps the occurrences of chemical bonds within tiny inclusions in 3,700-million-year-old metasedimentary rocks from West Greenland, finding greater evidence for organic life at this early date.

T. Hassenkam
M. P. Andersson
M. T. Rosing
Research24 Jul 2017
Nature

Volume: 548, P: 78-81
3.7 billion year old detrital sediments in Greenland are consistent with active plate tectonics in the Eoarchean

The Isua Supercrustal Belt in Greenland hosts sedimentary rocks that were deposited 3.7 billion years ago in the forearc environment of an active convergent plate boundary, suggesting subduction-related plate tectonics in the Eoarchean, as indicated by geochemical data and tectonostratigraphic analyses of an 80-m drill core.

Austin Jarl Boyd
Minik T. Rosing
Tue Hassenkam
ResearchOpen Access15 Apr 2024
Communications Earth & Environment

Volume: 5, P: 1-7

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