首页|Telluric iron assemblages as a source of prebiotic phosphorus on the early Earth:Insights from Disko Island,Greenland
Telluric iron assemblages as a source of prebiotic phosphorus on the early Earth:Insights from Disko Island,Greenland
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Phosphorus is one of the key elements,which determined the emergence of primordial life on our planet.The source of prebiotic phosphorus was most likely to be easily soluble compounds containing phospho-rus in the negative form of oxidation(e.g.,phosphides).The present paper is the first thorough investi-gation of phosphide-bearing mineral assemblages confined to telluric(terrestrial)native iron from volcanic rocks of Disko Island,Greenland.Phosphorus speciation in given assemblages varies from the solid solution in native iron(up to 0.3 wt.％P),different phosphides-schreibersite Fe3P,nickelphosphide Ni3P,barringerite Fe2P,and phosphates,including fluorapatite,anhydrous Fe-Na phosphates,phosphoran olivine and pyroxene(up to 1 wt.％P).The diversity of observed phosphorus speciation can be explained by the steep changes of redox conditions during subsurface crystallization of iron-phosphide-bearing lavas.Based on the available data on likely redox conditions on the early Earth,we hypothesize that reac-tive prebiotic phosphorus may have originated from shallow crustal rocks.
Prebiotic phosphorusNative ironPhosphideReduced mineral assemblages
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