Results 141 to 150 of about 15,483 (211)

Flare-driven habitability: Expanding life's potential around low-mass stars. [PDF]

Innovation (Camb)
Gao DY, Liu HG, Yang M, Zhou JL.
europepmc   +1 more source

Diverging Mineral Chemistry of Iron and Nickel Throughout Earth's Changing Redox Conditions Reveals Foundation for Their Evolution as Protein Cofactors. [PDF]

Life (Basel)
Jelen BI, Peralta Y, Morrison SM, Christensen B, Moore EK.   +4 more
europepmc   +1 more source

Insights into Sudbury's deep architecture: a revised geodynamic model for Earth's largest ore-bearing impact structure. [PDF]

Sci Rep
Haugaard R, Spray JG, Adetunji AQ, Vayavur R, Hamilton MA, Snyder D, Cheraghi S, Ayer J, Henry K, Jørgensen TRC, Serafini G, Smith R, Gibson L.   +12 more
europepmc   +1 more source

Organic geochemical evidence for life in Archean rocks identified by pyrolysis-GC-MS and supervised machine learning. [PDF]

Proc Natl Acad Sci U S A
Wong ML, Prabhu A, Alexander CO, Cleaves HJ, Cody GD, Hystad G, Bermanec M, Bleeker W, Boyce CK, Corpolongo A, Czaja AD, Das S, Gaines RR, Gregory DD, Jaszczak JA, Javaux EJ, Jodder J, Knoll AH, Van Kranendonk M, Maloney KM, Noffke N, Rainbird R, Slaughter E, Stüeken EE, Summons RE, Westall F, Wiemann J, Xiao S, Hazen RM.   +28 more
europepmc   +1 more source

Variable redox states of sulfur in porphyry copper-fertile arc magmas. [PDF]

Sci Adv
Meng X, Simon AC, Mao J, Konecke BA, Kitajima K, Neill OK.   +5 more
europepmc   +1 more source

Revisiting the Eoarchean Akilia quartz-pyroxene rock with potassium isotopes: Implications for early-ocean sedimentation. [PDF]

Proc Natl Acad Sci U S A
Long ZY, Moynier F, Dai W, van Zuilen M, Deng J, Qiu KF.   +5 more
europepmc   +1 more source

An Archean atmosphere rich in sulfur biomolecules. [PDF]

Proc Natl Acad Sci U S A
Reed NW, Christensen CM, Surratt JD, McGlynn SE, Wing BA, Neubauer C, Tolbert MA, Browne EC.   +7 more
europepmc   +1 more source

Resurrected nitrogenases recapitulate canonical N-isotope biosignatures over two billion years. [PDF]

Nat Commun
Rucker HR, Bubphamanee K, Harris DF, Konhauser K, Seefeldt LC, Buick R, Kaçar B.   +6 more
europepmc   +1 more source

Archean Photoautotrophy: Some Alternatives and Limits

Origins of Life, 1979
From the Archean geological record, one can infer that photoautotrophy evolved early in earth history; however the nature of this photosynthesis -- whether it was predominately or cyanobacterial -- is less clearly understood. General agreement tht the earth's atmosphere did not become oxygen rich before the Early Proterozoic era places constraints on ...
Knoll, Andrew
openaire   +3 more sources

Picrite evidence for more Fe in Archean mantle reservoirs

Earth and Planetary Science Letters, 1999
Recently discovered Archean amphibolites at the Lake of the Enemy, N.T., Canada, have alkaline ferropicrite compositions (MgO ~14 wt%) with fractionated REE profiles (La/Yb = 10-15), high Nb/La ratios (1-2), and an average ε(Nd) value of +1.1 at 2.66 Ga,
William Davis, Don Francis
exaly   +2 more sources