Telluric iron assemblages as a source of prebiotic phosphorus on the early Earth:Insights from Disko Island,Greenland  

作　　者：Oleg S.Vereshchagin Maya O.Khmelnitskaya Larisa V.Kamaeva Natalia S.Vlasenko Dmitrii V.Pankin Vladimir N.Bocharov Sergey N.Britvin 

机构地区：[1]Saint Petersburg State University,University Embankment 7-9,St.Petersburg 199034,Russia [2]Udmurt Federal Research Center,Ural Branch,Russian Academy of Sciences,Izhevsk 426067,Russia [3]Nanomaterial Research Center,Kola Science Centre,Russian Academy of Sciences,Apatity 184209,Russia

出　　处：《Geoscience Frontiers》2024年第5期415-429,共15页地学前缘（英文版）

基　　金：supported by the Russian Science Foundation(grant 23-77-10025).

摘　　要：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 phosphorus in the negative form of oxidation(e.g.,phosphides).The present paper is the first thorough investigation 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 Fe_(3)P,nickelphosphide Ni_(3)P,barringerite Fe_(2)P,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 reactive prebiotic phosphorus may have originated from shallow crustal rocks.

关 键 词：Prebiotic phosphorus Native iron PHOSPHIDE Reduced mineral assemblages 

分 类 号：P618.13[天文地球—矿床学]